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Trojan.Siggen13.11405

Added to the Dr.Web virus database: 2021-04-22

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Classes\projects\shell\open\command] '' = '"%LOCALAPPDATA%\Programs\teamwork-projects-desktop\Teamwork Desktop.exe" "%1"'
Malicious functions
Injects code into
the following user processes:
  • teamwork desktop.exe
Modifies file system
Creates the following files
  • %TEMP%\nsx196.tmp\system.dll
  • %APPDATA%\teamwork desktop\partitions\projects\code cache\wasm\index-dir\temp-index
  • %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\temp-index
  • %APPDATA%\teamwork desktop\code cache\wasm\index
  • %APPDATA%\teamwork desktop\code cache\js\index
  • %APPDATA%\teamwork desktop\local storage\leveldb\log
  • %APPDATA%\teamwork desktop\local storage\leveldb\000001.dbtmp
  • %APPDATA%\teamwork desktop\local storage\leveldb\manifest-000001
  • %APPDATA%\teamwork desktop\partitions\projects\code cache\wasm\index
  • %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index
  • %APPDATA%\teamwork desktop\partitions\projects\local storage\leveldb\log
  • %APPDATA%\teamwork desktop\partitions\projects\local storage\leveldb\000001.dbtmp
  • %APPDATA%\teamwork desktop\partitions\projects\local storage\leveldb\manifest-000001
  • %HOMEPATH%\desktop\teamwork desktop.lnk
  • %TEMP%\nsx196.tmp\winshell.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\uninstall teamwork desktop.exe
  • %APPDATA%\teamwork desktop\code cache\wasm\index-dir\temp-index
  • %LOCALAPPDATA%\teamwork-projects-desktop-updater\package.7z
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\vulkan-1.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\vk_swiftshader.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\swiftshader\libglesv2.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\swiftshader\libegl.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\resources\elevate.exe
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\libglesv2.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\libegl.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\ffmpeg.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\d3dcompiler_47.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\teamwork desktop.exe
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\vk_swiftshader_icd.json
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\v8_context_snapshot.bin
  • %APPDATA%\microsoft\windows\start menu\programs\teamwork desktop.lnk
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\pt-pt.pak
  • %APPDATA%\teamwork desktop\gpucache\index
  • %APPDATA%\teamwork desktop\4ca29336-7876-4a7e-b676-264c2e3d1df3.tmp
  • %APPDATA%\teamwork desktop\8756b19e-4206-436e-ae67-81d0b5648620.tmp
  • %APPDATA%\teamwork desktop\ce31e155-98e1-4c10-a09f-9188f7c9e191.tmp
  • %APPDATA%\teamwork desktop\partitions\projects\b4551f98-f56a-43e3-97a0-8b7bfe1b5acf.tmp
  • %APPDATA%\teamwork desktop\partitions\projects\cache\f_000001
  • %APPDATA%\teamwork desktop\en-us-9-0.bdic
  • %APPDATA%\teamwork desktop\cache\f_000001
  • %APPDATA%\teamwork desktop\dictionaries\en-us-9-0.bdic
  • %APPDATA%\teamwork desktop\fontlookuptablecache\font_unique_name_table.pb
  • %APPDATA%\teamwork desktop\.updaterid
  • %APPDATA%\teamwork desktop\partitions\projects\gpucache\data_3
  • %APPDATA%\teamwork desktop\partitions\projects\gpucache\data_2
  • %APPDATA%\teamwork desktop\partitions\projects\gpucache\data_1
  • %APPDATA%\teamwork desktop\partitions\projects\gpucache\data_0
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\snapshot_blob.bin
  • %APPDATA%\teamwork desktop\code cache\js\index-dir\temp-index
  • %APPDATA%\teamwork desktop\cache\data_2
  • %APPDATA%\teamwork desktop\cache\data_1
  • %APPDATA%\teamwork desktop\cache\data_0
  • %APPDATA%\teamwork desktop\cache\index
  • %APPDATA%\teamwork desktop\partitions\projects\cache\data_3
  • %APPDATA%\teamwork desktop\partitions\projects\cache\data_2
  • %APPDATA%\teamwork desktop\partitions\projects\cache\data_1
  • %APPDATA%\teamwork desktop\partitions\projects\cache\data_0
  • %APPDATA%\teamwork desktop\partitions\projects\cache\index
  • %APPDATA%\teamwork desktop\partitions\projects\cookies
  • %APPDATA%\teamwork desktop\partitions\projects\cookies-journal
  • %APPDATA%\teamwork desktop\gpucache\data_3
  • %APPDATA%\teamwork desktop\gpucache\data_2
  • %APPDATA%\teamwork desktop\gpucache\data_1
  • %APPDATA%\teamwork desktop\cache\data_3
  • %APPDATA%\teamwork desktop\gpucache\data_0
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\resources\app.asar
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\resources\app-update.yml
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\resources.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\bn.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\fr.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\fil.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\fi.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\fa.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\et.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\es.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\es-419.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\en-us.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\en-gb.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\el.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\de.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\da.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\cs.pak
  • %APPDATA%\teamwork desktop\partitions\projects\ed7dc9d7-6250-4349-ab7d-5c7abe793592.tmp
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\he.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\bg.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ar.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\am.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\icudtl.dat
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\chrome_200_percent.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\chrome_100_percent.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\licenses.chromium.html
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\license.electron.txt
  • %TEMP%\nsx196.tmp\nsis7z.dll
  • %TEMP%\nsx196.tmp\package.7z
  • %TEMP%\nsx196.tmp\inetc.dll
  • %TEMP%\nsx196.tmp\nsprocess.dll
  • %TEMP%\nsx196.tmp\spiderbanner.dll
  • %TEMP%\nsx196.tmp\stdutils.dll
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ca.pak
  • %APPDATA%\teamwork desktop\partitions\projects\gpucache\index
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\hi.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\id.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\hr.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\zh-tw.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\zh-cn.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\vi.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\uk.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\tr.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\th.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\te.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ta.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\sw.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\sv.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\sr.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\sl.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\sk.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\hu.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ru.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\gu.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\pt-br.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\pl.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\nl.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\nb.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ms.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\mr.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ml.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\lv.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\lt.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ko.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\kn.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ja.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\it.pak
  • %LOCALAPPDATA%\programs\teamwork-projects-desktop\locales\ro.pak
  • %TEMP%\3632f0b5-e636-4af3-8264-8a2f9d533b22.tmp
Deletes the following files
  • %TEMP%\nsx196.tmp\inetc.dll
  • %TEMP%\nsx196.tmp\nsis7z.dll
  • %TEMP%\nsx196.tmp\nsprocess.dll
  • %TEMP%\nsx196.tmp\spiderbanner.dll
  • %TEMP%\nsx196.tmp\stdutils.dll
  • %TEMP%\nsx196.tmp\system.dll
  • %TEMP%\nsx196.tmp\winshell.dll
  • %APPDATA%\teamwork desktop\preferences~rf8649b.tmp
  • %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\the-real-index~rf92396.tmp
  • %APPDATA%\teamwork desktop\partitions\projects\network persistent state~rf94172.tmp
  • %APPDATA%\teamwork desktop\network persistent state~rf941df.tmp
Moves the following files
  • from %TEMP%\nsx196.tmp\package.7z to %LOCALAPPDATA%\teamwork-projects-desktop-updater\package.7z
  • from %APPDATA%\teamwork desktop\partitions\projects\local storage\leveldb\000001.dbtmp to %APPDATA%\teamwork desktop\partitions\projects\local storage\leveldb\current
  • from %APPDATA%\teamwork desktop\local storage\leveldb\000001.dbtmp to %APPDATA%\teamwork desktop\local storage\leveldb\current
  • from %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\temp-index to %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\the-real-index
  • from %APPDATA%\teamwork desktop\partitions\projects\code cache\wasm\index-dir\temp-index to %APPDATA%\teamwork desktop\partitions\projects\code cache\wasm\index-dir\the-real-index
  • from %APPDATA%\teamwork desktop\code cache\js\index-dir\temp-index to %APPDATA%\teamwork desktop\code cache\js\index-dir\the-real-index
  • from %APPDATA%\teamwork desktop\code cache\wasm\index-dir\temp-index to %APPDATA%\teamwork desktop\code cache\wasm\index-dir\the-real-index
  • from %APPDATA%\teamwork desktop\partitions\projects\b4551f98-f56a-43e3-97a0-8b7bfe1b5acf.tmp to %APPDATA%\teamwork desktop\partitions\projects\preferences
  • from %APPDATA%\teamwork desktop\ce31e155-98e1-4c10-a09f-9188f7c9e191.tmp to %APPDATA%\teamwork desktop\preferences
  • from %APPDATA%\teamwork desktop\preferences to %APPDATA%\teamwork desktop\preferences~rf8649b.tmp
  • from %APPDATA%\teamwork desktop\4ca29336-7876-4a7e-b676-264c2e3d1df3.tmp to %APPDATA%\teamwork desktop\network persistent state
  • from %APPDATA%\teamwork desktop\partitions\projects\ed7dc9d7-6250-4349-ab7d-5c7abe793592.tmp to %APPDATA%\teamwork desktop\partitions\projects\network persistent state
  • from %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\the-real-index to %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\the-real-index~rf92396.tmp
  • from %APPDATA%\teamwork desktop\partitions\projects\network persistent state to %APPDATA%\teamwork desktop\partitions\projects\network persistent state~rf94172.tmp
  • from %APPDATA%\teamwork desktop\network persistent state to %APPDATA%\teamwork desktop\network persistent state~rf941df.tmp
Substitutes the following files
  • %APPDATA%\teamwork desktop\preferences
  • %APPDATA%\teamwork desktop\partitions\projects\code cache\js\index-dir\the-real-index
Network activity
Connects to
  • 'tw#####.s3.amazonaws.com':443
  • 'microsoft.com':80
  • 're####ctor.gvt1.com':443
  • 'te###ork.com':443
  • 'x.##2.us':80
TCP
  • 'tw#####.s3.amazonaws.com':443
  • 're####ctor.gvt1.com':443
  • 'r5######aigzrn7l.gvt1.com':443
  • 'r5######i5h7lner.gvt1.com':443
  • 'te###ork.com':443
UDP
  • DNS ASK tw#####.s3.amazonaws.com
  • DNS ASK microsoft.com
  • DNS ASK re####ctor.gvt1.com
  • DNS ASK r5######aigzrn7l.gvt1.com
  • DNS ASK r5######i5h7lner.gvt1.com
  • DNS ASK te###ork.com
  • DNS ASK x.##2.us
  • 'r5######aigzrn7l.gvt1.com':443
  • 'r5######i5h7lner.gvt1.com':443
Miscellaneous
Searches for the following windows
  • ClassName: '#32770' WindowName: ''
  • ClassName: 'Chrome_MessageWindow' WindowName: '%APPDATA%\Teamwork Desktop'
Creates and executes the following
  • '%LOCALAPPDATA%\programs\teamwork-projects-desktop\teamwork desktop.exe'
  • '%LOCALAPPDATA%\programs\teamwork-projects-desktop\teamwork desktop.exe' --type=gpu-process --field-trial-handle=1000,3542330579425399539,8626535815179128064,131072 --enable-features=WebComponentsV0Enabled --disable-features=CookiesWithoutSameSiteMustBeSecure,SameSi...
  • '%LOCALAPPDATA%\programs\teamwork-projects-desktop\teamwork desktop.exe' --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1000,3542330579425399539,8626535815179128064,131072 --enable-features=WebComponentsV0Enabled --disable-featur...
  • '%LOCALAPPDATA%\programs\teamwork-projects-desktop\teamwork desktop.exe' --type=renderer --field-trial-handle=1000,3542330579425399539,8626535815179128064,131072 --enable-features=WebComponentsV0Enabled --disable-features=CookiesWithoutSameSiteMustBeSecure,SameSiteB...

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

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