Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
30/01/2023, 04:29
Behavioral task
behavioral1
Sample
a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe
Resource
win7-20221111-en
windows7-x64
10 signatures
150 seconds
General
- Target a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe
- Size 283KB
- Sample230130-e4m6fsag2t
- SHA256 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34
- MD5 b53682a01d1e2cb83c1c19ae24f9c764
- SHA1 d8c676bd8e93a6c5ddcb8f194b6fad9f9e06e2cb
- SHA512 0e925211ef75719b99119e701fd0eb383fc87fba7b11fb9c40b9afd90a7973190877cae16859f0e553f2434c2a7efdb4e65a4d4170dd53079c8219d69c58fbc0
- SSDEEP 6144:KcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37u:KcW7KEZlPzCy37u
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
Family
-
darkcomet
Botnet
-
Guest16
C2
-
legpkz.no-ip.biz:1604
Mutex
-
DC_MUTEX-6NLXV6K
Attributes
-
InstallPath
MSDCSC\msdcsc.exe
-
gencode
X1ANFxb7gNlw
-
install
true
-
offline_keylogger
true
-
persistence
true
-
reg_key
MicroUpdate
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe - Executes dropped EXE 1 IoCs
pid Process 2100 msdcsc.exe -
resource yara_rule behavioral2/memory/768-132-0x0000000000400000-0x00000000004C7000-memory.dmp upx behavioral2/files/0x000600000001e590-134.dat upx behavioral2/files/0x000600000001e590-135.dat upx behavioral2/memory/2100-136-0x0000000000400000-0x00000000004C7000-memory.dmp upx behavioral2/memory/768-137-0x0000000000400000-0x00000000004C7000-memory.dmp upx behavioral2/memory/2100-138-0x0000000000400000-0x00000000004C7000-memory.dmp upx - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" msdcsc.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe" a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe - Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeSecurityPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeTakeOwnershipPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeLoadDriverPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeSystemProfilePrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeSystemtimePrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeProfSingleProcessPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeIncBasePriorityPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeCreatePagefilePrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeBackupPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeRestorePrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeShutdownPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeDebugPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeSystemEnvironmentPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeChangeNotifyPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeRemoteShutdownPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeUndockPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeManageVolumePrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeImpersonatePrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeCreateGlobalPrivilege 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: 33 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: 34 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: 35 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: 36 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe Token: SeIncreaseQuotaPrivilege 2100 msdcsc.exe Token: SeSecurityPrivilege 2100 msdcsc.exe Token: SeTakeOwnershipPrivilege 2100 msdcsc.exe Token: SeLoadDriverPrivilege 2100 msdcsc.exe Token: SeSystemProfilePrivilege 2100 msdcsc.exe Token: SeSystemtimePrivilege 2100 msdcsc.exe Token: SeProfSingleProcessPrivilege 2100 msdcsc.exe Token: SeIncBasePriorityPrivilege 2100 msdcsc.exe Token: SeCreatePagefilePrivilege 2100 msdcsc.exe Token: SeBackupPrivilege 2100 msdcsc.exe Token: SeRestorePrivilege 2100 msdcsc.exe Token: SeShutdownPrivilege 2100 msdcsc.exe Token: SeDebugPrivilege 2100 msdcsc.exe Token: SeSystemEnvironmentPrivilege 2100 msdcsc.exe Token: SeChangeNotifyPrivilege 2100 msdcsc.exe Token: SeRemoteShutdownPrivilege 2100 msdcsc.exe Token: SeUndockPrivilege 2100 msdcsc.exe Token: SeManageVolumePrivilege 2100 msdcsc.exe Token: SeImpersonatePrivilege 2100 msdcsc.exe Token: SeCreateGlobalPrivilege 2100 msdcsc.exe Token: 33 2100 msdcsc.exe Token: 34 2100 msdcsc.exe Token: 35 2100 msdcsc.exe Token: 36 2100 msdcsc.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2100 msdcsc.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 768 wrote to memory of 2100 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe 81 PID 768 wrote to memory of 2100 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe 81 PID 768 wrote to memory of 2100 768 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe 81
Processes
-
C:\Users\Admin\AppData\Local\Temp\a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe"C:\Users\Admin\AppData\Local\Temp\a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34.exe"1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:768 -
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2100
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
- Size 283KB
- SHA256 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34
- MD5 b53682a01d1e2cb83c1c19ae24f9c764
- SHA1 d8c676bd8e93a6c5ddcb8f194b6fad9f9e06e2cb
- SHA512 0e925211ef75719b99119e701fd0eb383fc87fba7b11fb9c40b9afd90a7973190877cae16859f0e553f2434c2a7efdb4e65a4d4170dd53079c8219d69c58fbc0
- SSDEEP 6144:KcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37u:KcW7KEZlPzCy37u
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
- Size 283KB
- SHA256 a02b90223fa6c71c2c4f94129af9c91956f66d69746ba77767511eb42f0cbe34
- MD5 b53682a01d1e2cb83c1c19ae24f9c764
- SHA1 d8c676bd8e93a6c5ddcb8f194b6fad9f9e06e2cb
- SHA512 0e925211ef75719b99119e701fd0eb383fc87fba7b11fb9c40b9afd90a7973190877cae16859f0e553f2434c2a7efdb4e65a4d4170dd53079c8219d69c58fbc0
- SSDEEP 6144:KcNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37u:KcW7KEZlPzCy37u
- MD5 SHA1 SHA512 SSDEEP