darkcomet | cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81

General

Target

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Size

253KB
MD5

a4166b3570c3c1165c68c7ceb9aa8c65
SHA1

6f8637d1f10743a9e43abe646b44b7bb63abc1e7
SHA256

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81
SHA512

1953a35d3d6174aee555ffee66070ac02799f1410f7ced6692e3856b1b42e5cf5db4093d3f2feaeda5bd6fde568ae1ce97bfc829d69f31b8d89edff798d4d624

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:

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\MSDCSC\\msdcsc.exe"	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

msdcsc.exe

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

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Modify Existing Service
T1031

Processes:

msdcsc.exe

description ioc process

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

Disabling Security Tools
T1089

Modify Registry
T1112
Disables RegEdit via registry modification
evasion
Disables Task Manager via registry modification
evasion
Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

288 msdcsc.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"	msdcsc.exe

pid	process
288	msdcsc.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
\Windows\MSDCSC\msdcsc.exe	upx
\Windows\MSDCSC\msdcsc.exe	upx
C:\Windows\MSDCSC\msdcsc.exe	upx

Loads dropped DLL 2 IoCs

Processes:

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

pid	process
1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

msdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\MSDCSC\\msdcsc.exe"	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

Drops file in Windows directory 3 IoCs

Processes:

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe

description	ioc	process
File created	C:\Windows\MSDCSC\msdcsc.exe	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
File opened for modification	C:\Windows\MSDCSC\msdcsc.exe	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
File opened for modification	C:\Windows\MSDCSC\	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.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

288 msdcsc.exe

pid	process
288	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeSecurityPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeTakeOwnershipPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeLoadDriverPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeSystemProfilePrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeSystemtimePrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeProfSingleProcessPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeIncBasePriorityPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeCreatePagefilePrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeBackupPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeRestorePrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeShutdownPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeDebugPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeSystemEnvironmentPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeChangeNotifyPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeRemoteShutdownPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeUndockPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeManageVolumePrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeImpersonatePrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeCreateGlobalPrivilege	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: 33	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: 34	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: 35	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
Token: SeIncreaseQuotaPrivilege	288	msdcsc.exe
Token: SeSecurityPrivilege	288	msdcsc.exe
Token: SeTakeOwnershipPrivilege	288	msdcsc.exe
Token: SeLoadDriverPrivilege	288	msdcsc.exe
Token: SeSystemProfilePrivilege	288	msdcsc.exe
Token: SeSystemtimePrivilege	288	msdcsc.exe
Token: SeProfSingleProcessPrivilege	288	msdcsc.exe
Token: SeIncBasePriorityPrivilege	288	msdcsc.exe
Token: SeCreatePagefilePrivilege	288	msdcsc.exe
Token: SeBackupPrivilege	288	msdcsc.exe
Token: SeRestorePrivilege	288	msdcsc.exe
Token: SeShutdownPrivilege	288	msdcsc.exe
Token: SeDebugPrivilege	288	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	288	msdcsc.exe
Token: SeChangeNotifyPrivilege	288	msdcsc.exe
Token: SeRemoteShutdownPrivilege	288	msdcsc.exe
Token: SeUndockPrivilege	288	msdcsc.exe
Token: SeManageVolumePrivilege	288	msdcsc.exe
Token: SeImpersonatePrivilege	288	msdcsc.exe
Token: SeCreateGlobalPrivilege	288	msdcsc.exe
Token: 33	288	msdcsc.exe
Token: 34	288	msdcsc.exe
Token: 35	288	msdcsc.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 1088 wrote to memory of 1408	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1408	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1408	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1408	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1136	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1136	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1136	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1088 wrote to memory of 1136	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	cmd.exe
PID 1136 wrote to memory of 1636	1136	cmd.exe	attrib.exe
PID 1136 wrote to memory of 1636	1136	cmd.exe	attrib.exe
PID 1136 wrote to memory of 1636	1136	cmd.exe	attrib.exe
PID 1136 wrote to memory of 1636	1136	cmd.exe	attrib.exe
PID 1408 wrote to memory of 1600	1408	cmd.exe	attrib.exe
PID 1408 wrote to memory of 1600	1408	cmd.exe	attrib.exe
PID 1408 wrote to memory of 1600	1408	cmd.exe	attrib.exe
PID 1408 wrote to memory of 1600	1408	cmd.exe	attrib.exe
PID 1088 wrote to memory of 288	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	msdcsc.exe
PID 1088 wrote to memory of 288	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	msdcsc.exe
PID 1088 wrote to memory of 288	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	msdcsc.exe
PID 1088 wrote to memory of 288	1088	cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe	msdcsc.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe
PID 288 wrote to memory of 528	288	msdcsc.exe	notepad.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

msdcsc.exe

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

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1636 attrib.exe
1600 attrib.exe

pid	process
1636	attrib.exe
1600	attrib.exe

C:\Users\Admin\AppData\Local\Temp\cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe
"C:\Users\Admin\AppData\Local\Temp\cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1408
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81.exe" +s +h
    3⤵
    - Views/modifies file attributes
    PID:1600
- 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:1136
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Views/modifies file attributes
    PID:1636
- C:\Windows\MSDCSC\msdcsc.exe
  "C:\Windows\MSDCSC\msdcsc.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Executes dropped EXE
  - Windows security modification
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:288
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:528

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

2

T1158

Modify Existing Service

2

T1031

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Disabling Security Tools

2

T1089

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\MSDCSC\msdcsc.exe

MD5
a4166b3570c3c1165c68c7ceb9aa8c65

SHA1
6f8637d1f10743a9e43abe646b44b7bb63abc1e7

SHA256
cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81

SHA512
1953a35d3d6174aee555ffee66070ac02799f1410f7ced6692e3856b1b42e5cf5db4093d3f2feaeda5bd6fde568ae1ce97bfc829d69f31b8d89edff798d4d624

Download Submit
\Windows\MSDCSC\msdcsc.exe

MD5
a4166b3570c3c1165c68c7ceb9aa8c65

SHA1
6f8637d1f10743a9e43abe646b44b7bb63abc1e7

SHA256
cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81

SHA512
1953a35d3d6174aee555ffee66070ac02799f1410f7ced6692e3856b1b42e5cf5db4093d3f2feaeda5bd6fde568ae1ce97bfc829d69f31b8d89edff798d4d624

Download Submit
\Windows\MSDCSC\msdcsc.exe

MD5
a4166b3570c3c1165c68c7ceb9aa8c65

SHA1
6f8637d1f10743a9e43abe646b44b7bb63abc1e7

SHA256
cff9df67e143e90b061018071340e97fcc6a96807ca79ef0c980c3aa0dec8c81

SHA512
1953a35d3d6174aee555ffee66070ac02799f1410f7ced6692e3856b1b42e5cf5db4093d3f2feaeda5bd6fde568ae1ce97bfc829d69f31b8d89edff798d4d624

Download Submit
memory/288-67-0x0000000000000000-mapping.dmp

Download
memory/288-72-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/528-70-0x0000000000000000-mapping.dmp

Download
memory/528-73-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/1088-59-0x00000000753B1000-0x00000000753B3000-memory.dmp

Filesize
8KB

Download
memory/1088-60-0x0000000000240000-0x0000000000241000-memory.dmp

Filesize
4KB

Download
memory/1136-62-0x0000000000000000-mapping.dmp

Download
memory/1408-61-0x0000000000000000-mapping.dmp

Download
memory/1600-64-0x0000000000000000-mapping.dmp

Download
memory/1636-63-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads