darkcomet | 57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f

General

Target

57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe
Size

541KB
MD5

60a23c51894524a344bfecab6532dc7f
SHA1

fb84a84cb7e6ce0ecf8fc75ffcf162ddcaffcdd7
SHA256

57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f
SHA512

a43f13af5fc0beeec1802a8541cd79104766e82b4770221e0e8bfe78df48b04267d0b777a457badee7a548d90bcd7786048e616e666e566a80e20d8cf4a3ca52

Score

10^/10

darkcomet evasion persistence rat trojan upx

Malware Config

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:

Gekon.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\\Local\\Temp\\MSDC1SC\\msd1csc.exe"	Gekon.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

msd1csc.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msd1csc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msd1csc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msd1csc.exe

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Modify Existing Service
T1031

Processes:

msd1csc.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msd1csc.exe
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
Disables Task Manager via registry modification
evasion
Executes dropped EXE 2 IoCs

Processes:

Gekon.exemsd1csc.exe

pid process

3268 Gekon.exe
636 msd1csc.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	msd1csc.exe

pid	process
3268	Gekon.exe
636	msd1csc.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Gekon.exe	upx
C:\Users\Admin\AppData\Roaming\Gekon.exe	upx
C:\Users\Admin\AppData\Local\Temp\MSDC1SC\msd1csc.exe	upx
C:\Users\Admin\AppData\Local\Temp\MSDC1SC\msd1csc.exe	upx

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exeGekon.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	Gekon.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

msd1csc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msd1csc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msd1csc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Gekon.exemsd1csc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate1 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDC1SC\\msd1csc.exe"	Gekon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate1 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDC1SC\\msd1csc.exe"	msd1csc.exe

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

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

Gekon.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ Gekon.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msd1csc.exe

pid process

636 msd1csc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Gekon.exe

pid	process
636	msd1csc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

Gekon.exemsd1csc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3268	Gekon.exe
Token: SeSecurityPrivilege	3268	Gekon.exe
Token: SeTakeOwnershipPrivilege	3268	Gekon.exe
Token: SeLoadDriverPrivilege	3268	Gekon.exe
Token: SeSystemProfilePrivilege	3268	Gekon.exe
Token: SeSystemtimePrivilege	3268	Gekon.exe
Token: SeProfSingleProcessPrivilege	3268	Gekon.exe
Token: SeIncBasePriorityPrivilege	3268	Gekon.exe
Token: SeCreatePagefilePrivilege	3268	Gekon.exe
Token: SeBackupPrivilege	3268	Gekon.exe
Token: SeRestorePrivilege	3268	Gekon.exe
Token: SeShutdownPrivilege	3268	Gekon.exe
Token: SeDebugPrivilege	3268	Gekon.exe
Token: SeSystemEnvironmentPrivilege	3268	Gekon.exe
Token: SeChangeNotifyPrivilege	3268	Gekon.exe
Token: SeRemoteShutdownPrivilege	3268	Gekon.exe
Token: SeUndockPrivilege	3268	Gekon.exe
Token: SeManageVolumePrivilege	3268	Gekon.exe
Token: SeImpersonatePrivilege	3268	Gekon.exe
Token: SeCreateGlobalPrivilege	3268	Gekon.exe
Token: 33	3268	Gekon.exe
Token: 34	3268	Gekon.exe
Token: 35	3268	Gekon.exe
Token: 36	3268	Gekon.exe
Token: SeIncreaseQuotaPrivilege	636	msd1csc.exe
Token: SeSecurityPrivilege	636	msd1csc.exe
Token: SeTakeOwnershipPrivilege	636	msd1csc.exe
Token: SeLoadDriverPrivilege	636	msd1csc.exe
Token: SeSystemProfilePrivilege	636	msd1csc.exe
Token: SeSystemtimePrivilege	636	msd1csc.exe
Token: SeProfSingleProcessPrivilege	636	msd1csc.exe
Token: SeIncBasePriorityPrivilege	636	msd1csc.exe
Token: SeCreatePagefilePrivilege	636	msd1csc.exe
Token: SeBackupPrivilege	636	msd1csc.exe
Token: SeRestorePrivilege	636	msd1csc.exe
Token: SeShutdownPrivilege	636	msd1csc.exe
Token: SeDebugPrivilege	636	msd1csc.exe
Token: SeSystemEnvironmentPrivilege	636	msd1csc.exe
Token: SeChangeNotifyPrivilege	636	msd1csc.exe
Token: SeRemoteShutdownPrivilege	636	msd1csc.exe
Token: SeUndockPrivilege	636	msd1csc.exe
Token: SeManageVolumePrivilege	636	msd1csc.exe
Token: SeImpersonatePrivilege	636	msd1csc.exe
Token: SeCreateGlobalPrivilege	636	msd1csc.exe
Token: 33	636	msd1csc.exe
Token: 34	636	msd1csc.exe
Token: 35	636	msd1csc.exe
Token: 36	636	msd1csc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msd1csc.exe

pid process

636 msd1csc.exe

pid	process
636	msd1csc.exe

Suspicious use of WriteProcessMemory 57 IoCs

Processes:

57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exeGekon.execmd.execmd.exemsd1csc.exe

description	pid	process	target process
PID 2252 wrote to memory of 3268	2252	57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe	Gekon.exe
PID 2252 wrote to memory of 3268	2252	57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe	Gekon.exe
PID 2252 wrote to memory of 3268	2252	57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe	Gekon.exe
PID 3268 wrote to memory of 3396	3268	Gekon.exe	cmd.exe
PID 3268 wrote to memory of 3396	3268	Gekon.exe	cmd.exe
PID 3268 wrote to memory of 3396	3268	Gekon.exe	cmd.exe
PID 3268 wrote to memory of 4376	3268	Gekon.exe	cmd.exe
PID 3268 wrote to memory of 4376	3268	Gekon.exe	cmd.exe
PID 3268 wrote to memory of 4376	3268	Gekon.exe	cmd.exe
PID 3396 wrote to memory of 3800	3396	cmd.exe	attrib.exe
PID 3396 wrote to memory of 3800	3396	cmd.exe	attrib.exe
PID 3396 wrote to memory of 3800	3396	cmd.exe	attrib.exe
PID 4376 wrote to memory of 4520	4376	cmd.exe	attrib.exe
PID 4376 wrote to memory of 4520	4376	cmd.exe	attrib.exe
PID 4376 wrote to memory of 4520	4376	cmd.exe	attrib.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 2248	3268	Gekon.exe	notepad.exe
PID 3268 wrote to memory of 636	3268	Gekon.exe	msd1csc.exe
PID 3268 wrote to memory of 636	3268	Gekon.exe	msd1csc.exe
PID 3268 wrote to memory of 636	3268	Gekon.exe	msd1csc.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe
PID 636 wrote to memory of 4944	636	msd1csc.exe	notepad.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

msd1csc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	msd1csc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	msd1csc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	msd1csc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

3800 attrib.exe
4520 attrib.exe

pid	process
3800	attrib.exe
4520	attrib.exe

C:\Users\Admin\AppData\Local\Temp\57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe
"C:\Users\Admin\AppData\Local\Temp\57ea796132c2aaab208d837a2405013f5aff35f7808db136032540ca5af6388f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2252

C:\Users\Admin\AppData\Roaming\Gekon.exe
"C:\Users\Admin\AppData\Roaming\Gekon.exe"
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3268

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Roaming\Gekon.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:3396

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Roaming\Gekon.exe" +s +h
4⤵
- Views/modifies file attributes
PID:3800

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Roaming" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:4376

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Roaming" +s +h
4⤵
- Views/modifies file attributes
PID:4520

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:2248

C:\Users\Admin\AppData\Local\Temp\MSDC1SC\msd1csc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDC1SC\msd1csc.exe"
3⤵
- Modifies firewall policy service
- Modifies security service
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:636

C:\Windows\SysWOW64\notepad.exe
notepad
4⤵
PID:4944

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

2

T1031

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

7

T1112

Disabling Security Tools

2

T1089

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\AppData\Local\Temp\MSDC1SC\msd1csc.exe
Filesize
252KB

MD5
6f648790e3f364b7885b15a75dc84e90

SHA1
1e53de6d72c77796efc313becf40575cf0a464db

SHA256
30bcb57982cf131921d229ea13f6b1086bdd722266fde287609a31fb1896184a

SHA512
8bb05a9d42e65016fe171cd3d6ed38c06c7b990aad3efdb5494bd89dd29b2031b3bce3aeb4f4999052a4a6ba95a18465da15203fd599dd35935b7fd432d0aa40

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDC1SC\msd1csc.exe
Filesize
252KB

MD5
6f648790e3f364b7885b15a75dc84e90

SHA1
1e53de6d72c77796efc313becf40575cf0a464db

SHA256
30bcb57982cf131921d229ea13f6b1086bdd722266fde287609a31fb1896184a

SHA512
8bb05a9d42e65016fe171cd3d6ed38c06c7b990aad3efdb5494bd89dd29b2031b3bce3aeb4f4999052a4a6ba95a18465da15203fd599dd35935b7fd432d0aa40

Download Submit
C:\Users\Admin\AppData\Roaming\Gekon.exe
Filesize
252KB

MD5
6f648790e3f364b7885b15a75dc84e90

SHA1
1e53de6d72c77796efc313becf40575cf0a464db

SHA256
30bcb57982cf131921d229ea13f6b1086bdd722266fde287609a31fb1896184a

SHA512
8bb05a9d42e65016fe171cd3d6ed38c06c7b990aad3efdb5494bd89dd29b2031b3bce3aeb4f4999052a4a6ba95a18465da15203fd599dd35935b7fd432d0aa40

Download Submit
C:\Users\Admin\AppData\Roaming\Gekon.exe
Filesize
252KB

MD5
6f648790e3f364b7885b15a75dc84e90

SHA1
1e53de6d72c77796efc313becf40575cf0a464db

SHA256
30bcb57982cf131921d229ea13f6b1086bdd722266fde287609a31fb1896184a

SHA512
8bb05a9d42e65016fe171cd3d6ed38c06c7b990aad3efdb5494bd89dd29b2031b3bce3aeb4f4999052a4a6ba95a18465da15203fd599dd35935b7fd432d0aa40

Download Submit
memory/636-138-0x0000000000000000-mapping.dmp

Download
memory/2248-137-0x0000000000000000-mapping.dmp

Download
memory/3268-130-0x0000000000000000-mapping.dmp

Download
memory/3396-133-0x0000000000000000-mapping.dmp

Download
memory/3800-135-0x0000000000000000-mapping.dmp

Download
memory/4376-134-0x0000000000000000-mapping.dmp

Download
memory/4520-136-0x0000000000000000-mapping.dmp

Download
memory/4944-141-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads