Analysis
- max time kernel
67s - max time network
137s - platform
windows10_x64 - resource
win10v20210408 - submitted
10/06/2021, 13:07
Static task
static1
Behavioral task
behavioral1
Sample
6b7829cb6f27c9382e48822f36ce2b03.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
6b7829cb6f27c9382e48822f36ce2b03.exe
Resource
win10v20210408
General
- Target 6b7829cb6f27c9382e48822f36ce2b03.exe
- Size 859KB
- Sample210610-e44hxmegjs
- SHA256 3e4676b65c821a9509ba52b43e12248a75cc8f68b212d9852786cc6424003d60
- MD5 6b7829cb6f27c9382e48822f36ce2b03
- SHA1 190cd052a6de77dfa081172a7917dde892632d97
- SHA512 3a1f2edd75ed62939cfe4a3becef1cf844fbd9e04786e007f13688812dd8f292561b2092153f1ab19d46fa1a20163805184ddbdea9dda8dbc23963525362909b
- MD5 SHA1 SHA512
Malware Config
Extracted
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vidar
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39.3
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517
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https://bandakere.tumblr.com
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profile_id
517
Signatures
- Deletes Windows Defender Definitions 2 TTPs 1 IoCs
Uses mpcmdrun utility to delete all AV definitions.
pid Process 2268 mpcmdrun.exe - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Vidar Stealer 4 IoCs
resource yara_rule behavioral2/memory/1868-143-0x00000000004680AD-mapping.dmp family_vidar behavioral2/memory/1868-142-0x0000000000400000-0x000000000049B000-memory.dmp family_vidar behavioral2/memory/1868-146-0x0000000000400000-0x000000000049B000-memory.dmp family_vidar behavioral2/memory/1780-145-0x0000000002090000-0x0000000002128000-memory.dmp family_vidar - Disables Task Manager via registry modification
- Downloads MZ/PE file
- Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\drivers\etc\hosts updatewin2.exe - Executes dropped EXE 5 IoCs
pid Process 3916 updatewin1.exe 2360 updatewin2.exe 1780 5.exe 812 updatewin1.exe 1868 5.exe - Loads dropped DLL 2 IoCs
pid Process 1868 5.exe 1868 5.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 936 icacls.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\c8477f60-c24f-4e5a-875d-a35815768079\\6b7829cb6f27c9382e48822f36ce2b03.exe\" --AutoStart" 6b7829cb6f27c9382e48822f36ce2b03.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 10 api.2ip.ua 11 api.2ip.ua 21 api.2ip.ua - Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 808 set thread context of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 4016 set thread context of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 1780 set thread context of 1868 1780 5.exe 87 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 5.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 5.exe - Delays execution with timeout.exe 1 IoCs
pid Process 1292 timeout.exe - Kills process with taskkill 1 IoCs
pid Process 3716 taskkill.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 6b7829cb6f27c9382e48822f36ce2b03.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 6b7829cb6f27c9382e48822f36ce2b03.exe - Suspicious behavior: EnumeratesProcesses 22 IoCs
pid Process 508 6b7829cb6f27c9382e48822f36ce2b03.exe 508 6b7829cb6f27c9382e48822f36ce2b03.exe 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 1868 5.exe 1868 5.exe 1868 5.exe 1868 5.exe 1868 5.exe 1868 5.exe 3052 powershell.exe 3052 powershell.exe 1868 5.exe 1868 5.exe 3052 powershell.exe 3052 powershell.exe 1780 powershell.exe 1780 powershell.exe 1780 powershell.exe 1036 powershell.exe 1036 powershell.exe 1036 powershell.exe - Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 3052 powershell.exe Token: SeDebugPrivilege 1780 powershell.exe Token: SeDebugPrivilege 3716 taskkill.exe Token: SeDebugPrivilege 1036 powershell.exe - Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 808 wrote to memory of 508 808 6b7829cb6f27c9382e48822f36ce2b03.exe 77 PID 508 wrote to memory of 936 508 6b7829cb6f27c9382e48822f36ce2b03.exe 79 PID 508 wrote to memory of 936 508 6b7829cb6f27c9382e48822f36ce2b03.exe 79 PID 508 wrote to memory of 936 508 6b7829cb6f27c9382e48822f36ce2b03.exe 79 PID 508 wrote to memory of 4016 508 6b7829cb6f27c9382e48822f36ce2b03.exe 80 PID 508 wrote to memory of 4016 508 6b7829cb6f27c9382e48822f36ce2b03.exe 80 PID 508 wrote to memory of 4016 508 6b7829cb6f27c9382e48822f36ce2b03.exe 80 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 4016 wrote to memory of 2168 4016 6b7829cb6f27c9382e48822f36ce2b03.exe 82 PID 2168 wrote to memory of 3916 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 83 PID 2168 wrote to memory of 3916 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 83 PID 2168 wrote to memory of 3916 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 83 PID 2168 wrote to memory of 2360 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 84 PID 2168 wrote to memory of 2360 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 84 PID 2168 wrote to memory of 2360 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 84 PID 2168 wrote to memory of 1780 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 85 PID 2168 wrote to memory of 1780 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 85 PID 2168 wrote to memory of 1780 2168 6b7829cb6f27c9382e48822f36ce2b03.exe 85 PID 3916 wrote to memory of 812 3916 updatewin1.exe 86 PID 3916 wrote to memory of 812 3916 updatewin1.exe 86 PID 3916 wrote to memory of 812 3916 updatewin1.exe 86 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 1780 wrote to memory of 1868 1780 5.exe 87 PID 812 wrote to memory of 3052 812 updatewin1.exe 88 PID 812 wrote to memory of 3052 812 updatewin1.exe 88 PID 812 wrote to memory of 3052 812 updatewin1.exe 88 PID 812 wrote to memory of 1780 812 updatewin1.exe 90 PID 812 wrote to memory of 1780 812 updatewin1.exe 90 PID 812 wrote to memory of 1780 812 updatewin1.exe 90 PID 1868 wrote to memory of 1296 1868 5.exe 92 PID 1868 wrote to memory of 1296 1868 5.exe 92 PID 1868 wrote to memory of 1296 1868 5.exe 92 PID 1296 wrote to memory of 3716 1296 cmd.exe 94 PID 1296 wrote to memory of 3716 1296 cmd.exe 94 PID 1296 wrote to memory of 3716 1296 cmd.exe 94 PID 1780 wrote to memory of 1036 1780 powershell.exe 95 PID 1780 wrote to memory of 1036 1780 powershell.exe 95 PID 1780 wrote to memory of 1036 1780 powershell.exe 95 PID 812 wrote to memory of 2268 812 updatewin1.exe 98 PID 812 wrote to memory of 2268 812 updatewin1.exe 98 PID 1296 wrote to memory of 1292 1296 cmd.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe"C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:808 -
C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe"C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe"2⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:508 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c8477f60-c24f-4e5a-875d-a35815768079" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:936
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C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe"C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4016 -
C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe"C:\Users\Admin\AppData\Local\Temp\6b7829cb6f27c9382e48822f36ce2b03.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2168 -
C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\updatewin1.exe"C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\updatewin1.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3916 -
C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\updatewin1.exe"C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\updatewin1.exe" --Admin6⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:812 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned7⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3052
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"7⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1780 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps18⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1036
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C:\Program Files\Windows Defender\mpcmdrun.exe"C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all7⤵
- Deletes Windows Defender Definitions
PID:2268
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""7⤵PID:1276
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C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\updatewin2.exe"C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\updatewin2.exe"5⤵
- Drops file in Drivers directory
- Executes dropped EXE
PID:2360
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C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\5.exe"C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\5.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1780 -
C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\5.exe"C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\5.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1868 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im 5.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\2262827b-78e3-499e-8921-6d66d28a0c54\5.exe" & del C:\ProgramData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im 5.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3716
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:1292
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