Analysis
- max time kernel
191s - max time network
227s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
14/10/2022, 10:02
Behavioral task
behavioral1
Sample
844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe
Resource
win7-20220901-en
windows7-x64
10 signatures
150 seconds
General
- Target 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe
- Size 251KB
- Sample221014-l21r4aade2
- SHA256 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d
- MD5 6d89f17a93725147c6f613ff4efcb340
- SHA1 d66e284e78c103aaa5829b581c8b348486a4b8e3
- SHA512 5e30d4707d489fb21a42b1c93238e4ad99cf372f15041b2bb1da312111f3565aa390be2e77e02e1485ff48492e33da57988d663625265b3762a464db467a169c
- SSDEEP 6144:ccNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL377:ccW7KEZlPzCy377
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
Family
-
darkcomet
Botnet
-
not a rat
C2
-
konedriver.zapto.org:3333
Mutex
-
DC_MUTEX-Y5E8LB3
Attributes
-
InstallPath
MSDCSC\msdcsc.exe
-
gencode
xWrcEfHfZmbo
-
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\\AppData\\Roaming\\MSDCSC\\msdcsc.exe" 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe - Executes dropped EXE 1 IoCs
pid Process 4548 msdcsc.exe -
resource yara_rule behavioral2/memory/4820-132-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/files/0x0007000000022e04-134.dat upx behavioral2/files/0x0007000000022e04-135.dat upx behavioral2/memory/4548-136-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/4820-137-0x0000000000400000-0x00000000004B7000-memory.dmp upx behavioral2/memory/4548-138-0x0000000000400000-0x00000000004B7000-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 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.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\\AppData\\Roaming\\MSDCSC\\msdcsc.exe" 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Set value (str) \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\msdcsc.exe" msdcsc.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\ 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe - Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeSecurityPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeTakeOwnershipPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeLoadDriverPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeSystemProfilePrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeSystemtimePrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeProfSingleProcessPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeIncBasePriorityPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeCreatePagefilePrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeBackupPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeRestorePrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeShutdownPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeDebugPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeSystemEnvironmentPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeChangeNotifyPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeRemoteShutdownPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeUndockPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeManageVolumePrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeImpersonatePrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeCreateGlobalPrivilege 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: 33 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: 34 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: 35 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: 36 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe Token: SeIncreaseQuotaPrivilege 4548 msdcsc.exe Token: SeSecurityPrivilege 4548 msdcsc.exe Token: SeTakeOwnershipPrivilege 4548 msdcsc.exe Token: SeLoadDriverPrivilege 4548 msdcsc.exe Token: SeSystemProfilePrivilege 4548 msdcsc.exe Token: SeSystemtimePrivilege 4548 msdcsc.exe Token: SeProfSingleProcessPrivilege 4548 msdcsc.exe Token: SeIncBasePriorityPrivilege 4548 msdcsc.exe Token: SeCreatePagefilePrivilege 4548 msdcsc.exe Token: SeBackupPrivilege 4548 msdcsc.exe Token: SeRestorePrivilege 4548 msdcsc.exe Token: SeShutdownPrivilege 4548 msdcsc.exe Token: SeDebugPrivilege 4548 msdcsc.exe Token: SeSystemEnvironmentPrivilege 4548 msdcsc.exe Token: SeChangeNotifyPrivilege 4548 msdcsc.exe Token: SeRemoteShutdownPrivilege 4548 msdcsc.exe Token: SeUndockPrivilege 4548 msdcsc.exe Token: SeManageVolumePrivilege 4548 msdcsc.exe Token: SeImpersonatePrivilege 4548 msdcsc.exe Token: SeCreateGlobalPrivilege 4548 msdcsc.exe Token: 33 4548 msdcsc.exe Token: 34 4548 msdcsc.exe Token: 35 4548 msdcsc.exe Token: 36 4548 msdcsc.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4548 msdcsc.exe - Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4820 wrote to memory of 4548 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe 80 PID 4820 wrote to memory of 4548 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe 80 PID 4820 wrote to memory of 4548 4820 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.exe"C:\Users\Admin\AppData\Local\Temp\844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d.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:4820 -
C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4548
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
- Size 251KB
- SHA256 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d
- MD5 6d89f17a93725147c6f613ff4efcb340
- SHA1 d66e284e78c103aaa5829b581c8b348486a4b8e3
- SHA512 5e30d4707d489fb21a42b1c93238e4ad99cf372f15041b2bb1da312111f3565aa390be2e77e02e1485ff48492e33da57988d663625265b3762a464db467a169c
- SSDEEP 6144:ccNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL377:ccW7KEZlPzCy377
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
- Size 251KB
- SHA256 844d33b194e5882d9bb2525b80c8fc33bd7f90bc57eb57f505955367c87b443d
- MD5 6d89f17a93725147c6f613ff4efcb340
- SHA1 d66e284e78c103aaa5829b581c8b348486a4b8e3
- SHA512 5e30d4707d489fb21a42b1c93238e4ad99cf372f15041b2bb1da312111f3565aa390be2e77e02e1485ff48492e33da57988d663625265b3762a464db467a169c
- SSDEEP 6144:ccNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL377:ccW7KEZlPzCy377
- MD5 SHA1 SHA512 SSDEEP