Analysis
- max time kernel
90s - max time network
130s - platform
windows10_x64 - resource
win10v20210408 - submitted
05/05/2021, 18:58
Static task
static1
Behavioral task
behavioral1
Sample
6c905b18c6865b7bfa638c7c46620f59.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
6c905b18c6865b7bfa638c7c46620f59.exe
Resource
win10v20210408
General
- Target 6c905b18c6865b7bfa638c7c46620f59.exe
- Size 831KB
- Sample210505-p1a3z3bcfe
- SHA256 50164e878b632fdf08b4f0de2060872ede8970238cbcfc55e32bfc1f81dfb4e2
- MD5 6c905b18c6865b7bfa638c7c46620f59
- SHA1 c856c712600d862651259e3a13f033ae3e159bd7
- SHA512 fa55ed2547d90657e62b31ffdf4023372dd7609e8c3783ee6bbb744aa7daf8a84c71d2fe745bcf83324ba07d5c8dafb64eac395ae3639e493d6474686b0ea92a
- MD5 SHA1 SHA512
Malware Config
Signatures
- Deletes Windows Defender Definitions 2 TTPs 1 IoCs
Uses mpcmdrun utility to delete all AV definitions.
pid Process 4892 mpcmdrun.exe - Djvu Ransomware
Ransomware which is a variant of the STOP family.
- 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 4 IoCs
pid Process 1012 updatewin1.exe 584 updatewin2.exe 1384 5.exe 4400 updatewin1.exe - Loads dropped DLL 2 IoCs
pid Process 1384 5.exe 1384 5.exe - Modifies file permissions 1 TTPs 1 IoCs
pid Process 4260 icacls.exe - Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
- 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\\419a62d6-0187-4f93-82b4-c06bdf515dfa\\6c905b18c6865b7bfa638c7c46620f59.exe\" --AutoStart" 6c905b18c6865b7bfa638c7c46620f59.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 11 api.2ip.ua 12 api.2ip.ua 21 api.2ip.ua - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 14 IoCs
pid pid_target Process procid_target 1760 1384 WerFault.exe 83 1508 1384 WerFault.exe 83 2340 1384 WerFault.exe 83 2504 1384 WerFault.exe 83 2672 1384 WerFault.exe 83 3004 1384 WerFault.exe 83 3060 1384 WerFault.exe 83 3632 1384 WerFault.exe 83 4304 1384 WerFault.exe 83 4312 1384 WerFault.exe 83 4008 1384 WerFault.exe 83 4416 1384 WerFault.exe 83 4428 1384 WerFault.exe 83 4408 1384 WerFault.exe 83 - 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 1532 timeout.exe - Kills process with taskkill 1 IoCs
pid Process 4592 taskkill.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 6c905b18c6865b7bfa638c7c46620f59.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 6c905b18c6865b7bfa638c7c46620f59.exe - Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4652 6c905b18c6865b7bfa638c7c46620f59.exe 4652 6c905b18c6865b7bfa638c7c46620f59.exe 4276 6c905b18c6865b7bfa638c7c46620f59.exe 4276 6c905b18c6865b7bfa638c7c46620f59.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1760 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 1508 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2340 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2504 WerFault.exe 2672 WerFault.exe 2672 WerFault.exe - Suspicious use of AdjustPrivilegeToken 20 IoCs
description pid Process Token: SeRestorePrivilege 1760 WerFault.exe Token: SeBackupPrivilege 1760 WerFault.exe Token: SeDebugPrivilege 1760 WerFault.exe Token: SeDebugPrivilege 1508 WerFault.exe Token: SeDebugPrivilege 2340 WerFault.exe Token: SeDebugPrivilege 2504 WerFault.exe Token: SeDebugPrivilege 2672 WerFault.exe Token: SeDebugPrivilege 3004 WerFault.exe Token: SeDebugPrivilege 3060 WerFault.exe Token: SeDebugPrivilege 3632 WerFault.exe Token: SeDebugPrivilege 4304 WerFault.exe Token: SeDebugPrivilege 4312 WerFault.exe Token: SeDebugPrivilege 4008 WerFault.exe Token: SeDebugPrivilege 4416 WerFault.exe Token: SeDebugPrivilege 4428 WerFault.exe Token: SeDebugPrivilege 4408 WerFault.exe Token: SeDebugPrivilege 4592 taskkill.exe Token: SeDebugPrivilege 2648 powershell.exe Token: SeDebugPrivilege 4968 powershell.exe Token: SeDebugPrivilege 2212 powershell.exe - Suspicious use of WriteProcessMemory 41 IoCs
description pid Process procid_target PID 4652 wrote to memory of 4260 4652 6c905b18c6865b7bfa638c7c46620f59.exe 75 PID 4652 wrote to memory of 4260 4652 6c905b18c6865b7bfa638c7c46620f59.exe 75 PID 4652 wrote to memory of 4260 4652 6c905b18c6865b7bfa638c7c46620f59.exe 75 PID 4652 wrote to memory of 4276 4652 6c905b18c6865b7bfa638c7c46620f59.exe 76 PID 4652 wrote to memory of 4276 4652 6c905b18c6865b7bfa638c7c46620f59.exe 76 PID 4652 wrote to memory of 4276 4652 6c905b18c6865b7bfa638c7c46620f59.exe 76 PID 4276 wrote to memory of 1012 4276 6c905b18c6865b7bfa638c7c46620f59.exe 80 PID 4276 wrote to memory of 1012 4276 6c905b18c6865b7bfa638c7c46620f59.exe 80 PID 4276 wrote to memory of 1012 4276 6c905b18c6865b7bfa638c7c46620f59.exe 80 PID 4276 wrote to memory of 584 4276 6c905b18c6865b7bfa638c7c46620f59.exe 81 PID 4276 wrote to memory of 584 4276 6c905b18c6865b7bfa638c7c46620f59.exe 81 PID 4276 wrote to memory of 584 4276 6c905b18c6865b7bfa638c7c46620f59.exe 81 PID 4276 wrote to memory of 1384 4276 6c905b18c6865b7bfa638c7c46620f59.exe 83 PID 4276 wrote to memory of 1384 4276 6c905b18c6865b7bfa638c7c46620f59.exe 83 PID 4276 wrote to memory of 1384 4276 6c905b18c6865b7bfa638c7c46620f59.exe 83 PID 1012 wrote to memory of 4400 1012 updatewin1.exe 96 PID 1012 wrote to memory of 4400 1012 updatewin1.exe 96 PID 1012 wrote to memory of 4400 1012 updatewin1.exe 96 PID 1384 wrote to memory of 3928 1384 5.exe 100 PID 1384 wrote to memory of 3928 1384 5.exe 100 PID 1384 wrote to memory of 3928 1384 5.exe 100 PID 3928 wrote to memory of 4592 3928 cmd.exe 102 PID 3928 wrote to memory of 4592 3928 cmd.exe 102 PID 3928 wrote to memory of 4592 3928 cmd.exe 102 PID 4400 wrote to memory of 2648 4400 updatewin1.exe 103 PID 4400 wrote to memory of 2648 4400 updatewin1.exe 103 PID 4400 wrote to memory of 2648 4400 updatewin1.exe 103 PID 3928 wrote to memory of 1532 3928 cmd.exe 106 PID 3928 wrote to memory of 1532 3928 cmd.exe 106 PID 3928 wrote to memory of 1532 3928 cmd.exe 106 PID 4400 wrote to memory of 4968 4400 updatewin1.exe 107 PID 4400 wrote to memory of 4968 4400 updatewin1.exe 107 PID 4400 wrote to memory of 4968 4400 updatewin1.exe 107 PID 4968 wrote to memory of 2212 4968 powershell.exe 109 PID 4968 wrote to memory of 2212 4968 powershell.exe 109 PID 4968 wrote to memory of 2212 4968 powershell.exe 109 PID 4400 wrote to memory of 4892 4400 updatewin1.exe 111 PID 4400 wrote to memory of 4892 4400 updatewin1.exe 111 PID 4400 wrote to memory of 1216 4400 updatewin1.exe 113 PID 4400 wrote to memory of 1216 4400 updatewin1.exe 113 PID 4400 wrote to memory of 1216 4400 updatewin1.exe 113
Processes
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C:\Users\Admin\AppData\Local\Temp\6c905b18c6865b7bfa638c7c46620f59.exe"C:\Users\Admin\AppData\Local\Temp\6c905b18c6865b7bfa638c7c46620f59.exe"1⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4652 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\419a62d6-0187-4f93-82b4-c06bdf515dfa" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
PID:4260
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C:\Users\Admin\AppData\Local\Temp\6c905b18c6865b7bfa638c7c46620f59.exe"C:\Users\Admin\AppData\Local\Temp\6c905b18c6865b7bfa638c7c46620f59.exe" --Admin IsNotAutoStart IsNotTask2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4276 -
C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\updatewin1.exe"C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\updatewin1.exe"3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1012 -
C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\updatewin1.exe"C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\updatewin1.exe" --Admin4⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4400 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exepowershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned5⤵
- Suspicious use of AdjustPrivilegeToken
PID:2648
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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}"5⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4968 -
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.ps16⤵
- Suspicious use of AdjustPrivilegeToken
PID:2212
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C:\Program Files\Windows Defender\mpcmdrun.exe"C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all5⤵
- Deletes Windows Defender Definitions
PID:4892
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""5⤵PID:1216
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C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\updatewin2.exe"C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\updatewin2.exe"3⤵
- Drops file in Drivers directory
- Executes dropped EXE
PID:584
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C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\5.exe"C:\Users\Admin\AppData\Local\174491bd-0eef-48b5-83a0-9a6b0ea23068\5.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1384 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 9124⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1760
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 9164⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1508
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 10764⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2340
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 10804⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2504
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 10604⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2672
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 11364⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:3004
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 14204⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:3060
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 14604⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:3632
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 14244⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:4304
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 17124⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:4312
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 14444⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:4008
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 15884⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:4416
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 17284⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:4428
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1384 -s 19604⤵
- Program crash
- Suspicious use of AdjustPrivilegeToken
PID:4408
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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\174491bd-0eef-48b5-83a0-9a6b0ea23068\5.exe" & del C:\ProgramData\*.dll & exit4⤵
- Suspicious use of WriteProcessMemory
PID:3928 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im 5.exe /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4592
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C:\Windows\SysWOW64\timeout.exetimeout /t 65⤵
- Delays execution with timeout.exe
PID:1532
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