darkcomet | 19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c

General

Target

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Size

253KB
MD5

f4a3645aaaa7b14f4dec9a9f2db0040e
SHA1

8430b2a225c8890a354024eb3273e5a21924aac2
SHA256

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c
SHA512

c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1

Score

10^/10

darkcomet guest16 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:888

Mutex

DC_MUTEX-3Y5WKVN

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
ELdwUcYkBbef
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe

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"	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

msdcsc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msdcsc.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

msdcsc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe

Disables Task Manager via registry modification
evasion
Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

1188 msdcsc.exe
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

2492 attrib.exe
220 attrib.exe

pid	process
1188	msdcsc.exe

pid	process
2492	attrib.exe
220	attrib.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/792-130-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe	upx
behavioral2/memory/792-136-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/1188-137-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/1188-141-0x0000000000400000-0x00000000004BA000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

1188 msdcsc.exe

pid	process
1188	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeSecurityPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeTakeOwnershipPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeLoadDriverPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeSystemProfilePrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeSystemtimePrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeProfSingleProcessPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeIncBasePriorityPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeCreatePagefilePrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeBackupPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeRestorePrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeShutdownPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeDebugPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeSystemEnvironmentPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeChangeNotifyPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeRemoteShutdownPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeUndockPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeManageVolumePrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeImpersonatePrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeCreateGlobalPrivilege	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: 33	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: 34	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: 35	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: 36	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
Token: SeIncreaseQuotaPrivilege	1188	msdcsc.exe
Token: SeSecurityPrivilege	1188	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1188	msdcsc.exe
Token: SeLoadDriverPrivilege	1188	msdcsc.exe
Token: SeSystemProfilePrivilege	1188	msdcsc.exe
Token: SeSystemtimePrivilege	1188	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1188	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1188	msdcsc.exe
Token: SeCreatePagefilePrivilege	1188	msdcsc.exe
Token: SeBackupPrivilege	1188	msdcsc.exe
Token: SeRestorePrivilege	1188	msdcsc.exe
Token: SeShutdownPrivilege	1188	msdcsc.exe
Token: SeDebugPrivilege	1188	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1188	msdcsc.exe
Token: SeChangeNotifyPrivilege	1188	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1188	msdcsc.exe
Token: SeUndockPrivilege	1188	msdcsc.exe
Token: SeManageVolumePrivilege	1188	msdcsc.exe
Token: SeImpersonatePrivilege	1188	msdcsc.exe
Token: SeCreateGlobalPrivilege	1188	msdcsc.exe
Token: 33	1188	msdcsc.exe
Token: 34	1188	msdcsc.exe
Token: 35	1188	msdcsc.exe
Token: 36	1188	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1188 msdcsc.exe

pid	process
1188	msdcsc.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exemsdcsc.execmd.execmd.exe

description	pid	process	target process
PID 792 wrote to memory of 988	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	cmd.exe
PID 792 wrote to memory of 988	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	cmd.exe
PID 792 wrote to memory of 988	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	cmd.exe
PID 792 wrote to memory of 244	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	cmd.exe
PID 792 wrote to memory of 244	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	cmd.exe
PID 792 wrote to memory of 244	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	cmd.exe
PID 792 wrote to memory of 1188	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	msdcsc.exe
PID 792 wrote to memory of 1188	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	msdcsc.exe
PID 792 wrote to memory of 1188	792	19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe	msdcsc.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 1188 wrote to memory of 1032	1188	msdcsc.exe	notepad.exe
PID 988 wrote to memory of 2492	988	cmd.exe	attrib.exe
PID 988 wrote to memory of 2492	988	cmd.exe	attrib.exe
PID 988 wrote to memory of 2492	988	cmd.exe	attrib.exe
PID 244 wrote to memory of 220	244	cmd.exe	attrib.exe
PID 244 wrote to memory of 220	244	cmd.exe	attrib.exe
PID 244 wrote to memory of 220	244	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

2492 attrib.exe
220 attrib.exe

pid	process
2492	attrib.exe
220	attrib.exe

C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe
"C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:792

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:988

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2492

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:244

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:220

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Modifies firewall policy service
- Disables RegEdit via registry modification
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1188

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:1032

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

1

T1031

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Hidden Files and Directories

2

T1158

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
253KB

MD5
f4a3645aaaa7b14f4dec9a9f2db0040e

SHA1
8430b2a225c8890a354024eb3273e5a21924aac2

SHA256
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c

SHA512
c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
253KB

MD5
f4a3645aaaa7b14f4dec9a9f2db0040e

SHA1
8430b2a225c8890a354024eb3273e5a21924aac2

SHA256
19e5a79bd2bb228fb166be53607fac6a3b48f7730cc4b0dd01e5f0e2f8485d1c

SHA512
c14c8aeb6147ad25f5089ff275762f21b066e781c7c2777a055adf11c15549e6dee729e577333d1221b6c61d3731c3824aeb0328650103c6edc77bf9a0cb18f1

Download Submit
memory/220-140-0x0000000000000000-mapping.dmp

Download
memory/244-132-0x0000000000000000-mapping.dmp

Download
memory/792-130-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/792-136-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/988-131-0x0000000000000000-mapping.dmp

Download
memory/1032-138-0x0000000000000000-mapping.dmp

Download
memory/1188-133-0x0000000000000000-mapping.dmp

Download
memory/1188-137-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1188-141-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2492-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads