darkcomet | f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24

General

Target

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Size

887KB
MD5

6e91f9d1c4b9fcf81c4a30e99358fde0
SHA1

4eeaf371809f8078e7ed0dc18e196e72c505f871
SHA256

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24
SHA512

b462cd0cd1d42a7081f254a118f75b58fab8750fd2348155eb04ba932274715899615bf05f8e0e923bb9abe02041ee582158c1e77e8c2df8d9efbd25fc00c3fe
SSDEEP

12288:HWzsaCUc+TcN09kaTUfucrmdztxZcSHg0yJnsumdjANlKk1F:2zs1wmaTU4dRxvgTJsjViB

Score

10^/10

darkcomet guest16 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

hackdarkcomet.ddns.net:1604

Mutex

DC_MUTEX-BRR8PJY

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
PglT1bwfgHY5
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:

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe

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"	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.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

Executes dropped EXE 2 IoCs

Processes:

msdcsc.exemsdcsc.exe

pid process

1212 msdcsc.exe
1788 msdcsc.exe

pid	process
1212	msdcsc.exe
1788	msdcsc.exe

UPX packed file 7 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2040-55-0x0000000000400000-0x00000000004BE000-memory.dmp	upx
behavioral1/memory/2040-57-0x0000000000400000-0x00000000004BE000-memory.dmp	upx
behavioral1/memory/2040-59-0x0000000000400000-0x00000000004BE000-memory.dmp	upx
behavioral1/memory/2040-61-0x0000000000400000-0x00000000004BE000-memory.dmp	upx
behavioral1/memory/2040-62-0x0000000000400000-0x00000000004BE000-memory.dmp	upx
behavioral1/memory/1788-77-0x0000000000400000-0x00000000004BE000-memory.dmp	upx
behavioral1/memory/1788-78-0x0000000000400000-0x00000000004BE000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe

pid	process
2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\msdcsc.exe"	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exemsdcsc.exe

description	pid	process	target process
PID 1932 set thread context of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1212 set thread context of 1788	1212	msdcsc.exe	msdcsc.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exef77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exemsdcsc.exemsdcsc.exe

description	pid	process
Token: SeDebugPrivilege	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeIncreaseQuotaPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeSecurityPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeTakeOwnershipPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeLoadDriverPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeSystemProfilePrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeSystemtimePrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeProfSingleProcessPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeIncBasePriorityPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeCreatePagefilePrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeBackupPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeRestorePrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeShutdownPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeDebugPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeSystemEnvironmentPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeChangeNotifyPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeRemoteShutdownPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeUndockPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeManageVolumePrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeImpersonatePrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeCreateGlobalPrivilege	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: 33	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: 34	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: 35	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
Token: SeDebugPrivilege	1212	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	1788	msdcsc.exe
Token: SeSecurityPrivilege	1788	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1788	msdcsc.exe
Token: SeLoadDriverPrivilege	1788	msdcsc.exe
Token: SeSystemProfilePrivilege	1788	msdcsc.exe
Token: SeSystemtimePrivilege	1788	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1788	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1788	msdcsc.exe
Token: SeCreatePagefilePrivilege	1788	msdcsc.exe
Token: SeBackupPrivilege	1788	msdcsc.exe
Token: SeRestorePrivilege	1788	msdcsc.exe
Token: SeShutdownPrivilege	1788	msdcsc.exe
Token: SeDebugPrivilege	1788	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1788	msdcsc.exe
Token: SeChangeNotifyPrivilege	1788	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1788	msdcsc.exe
Token: SeUndockPrivilege	1788	msdcsc.exe
Token: SeManageVolumePrivilege	1788	msdcsc.exe
Token: SeImpersonatePrivilege	1788	msdcsc.exe
Token: SeCreateGlobalPrivilege	1788	msdcsc.exe
Token: 33	1788	msdcsc.exe
Token: 34	1788	msdcsc.exe
Token: 35	1788	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1788 msdcsc.exe

pid	process
1788	msdcsc.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exef77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exemsdcsc.exe

description	pid	process	target process
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 1932 wrote to memory of 2040	1932	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
PID 2040 wrote to memory of 1212	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	msdcsc.exe
PID 2040 wrote to memory of 1212	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	msdcsc.exe
PID 2040 wrote to memory of 1212	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	msdcsc.exe
PID 2040 wrote to memory of 1212	2040	f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe
PID 1212 wrote to memory of 1788	1212	msdcsc.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
"C:\Users\Admin\AppData\Local\Temp\f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1932

C:\Users\Admin\AppData\Local\Temp\f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
C:\Users\Admin\AppData\Local\Temp\f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24.exe
2⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2040

C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1212

C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
4⤵
- Modifies firewall policy service
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1788

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Filesize
887KB

MD5
6e91f9d1c4b9fcf81c4a30e99358fde0

SHA1
4eeaf371809f8078e7ed0dc18e196e72c505f871

SHA256
f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24

SHA512
b462cd0cd1d42a7081f254a118f75b58fab8750fd2348155eb04ba932274715899615bf05f8e0e923bb9abe02041ee582158c1e77e8c2df8d9efbd25fc00c3fe

Download Submit
C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Filesize
887KB

MD5
6e91f9d1c4b9fcf81c4a30e99358fde0

SHA1
4eeaf371809f8078e7ed0dc18e196e72c505f871

SHA256
f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24

SHA512
b462cd0cd1d42a7081f254a118f75b58fab8750fd2348155eb04ba932274715899615bf05f8e0e923bb9abe02041ee582158c1e77e8c2df8d9efbd25fc00c3fe

Download Submit
C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Filesize
887KB

MD5
6e91f9d1c4b9fcf81c4a30e99358fde0

SHA1
4eeaf371809f8078e7ed0dc18e196e72c505f871

SHA256
f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24

SHA512
b462cd0cd1d42a7081f254a118f75b58fab8750fd2348155eb04ba932274715899615bf05f8e0e923bb9abe02041ee582158c1e77e8c2df8d9efbd25fc00c3fe

Download Submit
\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Filesize
887KB

MD5
6e91f9d1c4b9fcf81c4a30e99358fde0

SHA1
4eeaf371809f8078e7ed0dc18e196e72c505f871

SHA256
f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24

SHA512
b462cd0cd1d42a7081f254a118f75b58fab8750fd2348155eb04ba932274715899615bf05f8e0e923bb9abe02041ee582158c1e77e8c2df8d9efbd25fc00c3fe

Download Submit
\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Filesize
887KB

MD5
6e91f9d1c4b9fcf81c4a30e99358fde0

SHA1
4eeaf371809f8078e7ed0dc18e196e72c505f871

SHA256
f77ec75d9c444361b57f286bd40726bedeb8106ab18c02ff6a59ef2e3f4e5f24

SHA512
b462cd0cd1d42a7081f254a118f75b58fab8750fd2348155eb04ba932274715899615bf05f8e0e923bb9abe02041ee582158c1e77e8c2df8d9efbd25fc00c3fe

Download Submit
memory/1212-76-0x0000000072A80000-0x000000007302B000-memory.dmp

Filesize
5.7MB

Download
memory/1212-65-0x0000000000000000-mapping.dmp

Download
memory/1788-70-0x00000000004B8820-mapping.dmp

Download
memory/1788-78-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/1788-77-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/1932-60-0x0000000073FC0000-0x000000007456B000-memory.dmp

Filesize
5.7MB

Download
memory/1932-54-0x0000000075F51000-0x0000000075F53000-memory.dmp

Filesize
8KB

Download
memory/2040-62-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/2040-55-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/2040-56-0x00000000004B8820-mapping.dmp

Download
memory/2040-57-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/2040-59-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download
memory/2040-61-0x0000000000400000-0x00000000004BE000-memory.dmp

Filesize
760KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads