darkcomet | 61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc

Analysis

max time kernel
152s
max time network
43s
platform
windows7_x64
resource
win7-20220715-en
resource tags

arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
submitted
30-07-2022 20:29

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General

Target

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Size

658KB
MD5

674f4d8ef4964657adf1aa84d1a4bd22
SHA1

fd837d847f4840edb6cc1218f1ea59a7813bfc96
SHA256

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc
SHA512

eea4f665c5233d8ecfaecf3fbc59b52d9a5dc62b8ce4d2c17c261d53d75841756df27a1f1ae96d63bcade4bd6213599d92f975d5df809b7669a47ca4a7126d84

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

cometka321.ddns.net:1604

Mutex

DC_MUTEX-JZ5G2G4

Attributes

InstallPath
Windows\msdcsc.exe
gencode
TjzE59HsqfK5
install
true
offline_keylogger
true
persistence
true
reg_key
WindowsUpdate

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:

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.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\\Windows\\msdcsc.exe"	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.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

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

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

Windows security bypass 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

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

msdcsc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\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

1700 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

1496 attrib.exe
1600 attrib.exe

pid	process
1700	msdcsc.exe

pid	process
1496	attrib.exe
1600	attrib.exe

Loads dropped DLL 2 IoCs

Processes:

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe

pid	process
1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.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\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exemsdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windows\\msdcsc.exe"	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windows\\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 behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

1700 msdcsc.exe

pid	process
1700	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeSecurityPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeTakeOwnershipPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeLoadDriverPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeSystemProfilePrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeSystemtimePrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeProfSingleProcessPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeIncBasePriorityPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeCreatePagefilePrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeBackupPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeRestorePrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeShutdownPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeDebugPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeSystemEnvironmentPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeChangeNotifyPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeRemoteShutdownPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeUndockPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeManageVolumePrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeImpersonatePrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeCreateGlobalPrivilege	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: 33	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: 34	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: 35	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
Token: SeIncreaseQuotaPrivilege	1700	msdcsc.exe
Token: SeSecurityPrivilege	1700	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1700	msdcsc.exe
Token: SeLoadDriverPrivilege	1700	msdcsc.exe
Token: SeSystemProfilePrivilege	1700	msdcsc.exe
Token: SeSystemtimePrivilege	1700	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1700	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1700	msdcsc.exe
Token: SeCreatePagefilePrivilege	1700	msdcsc.exe
Token: SeBackupPrivilege	1700	msdcsc.exe
Token: SeRestorePrivilege	1700	msdcsc.exe
Token: SeShutdownPrivilege	1700	msdcsc.exe
Token: SeDebugPrivilege	1700	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1700	msdcsc.exe
Token: SeChangeNotifyPrivilege	1700	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1700	msdcsc.exe
Token: SeUndockPrivilege	1700	msdcsc.exe
Token: SeManageVolumePrivilege	1700	msdcsc.exe
Token: SeImpersonatePrivilege	1700	msdcsc.exe
Token: SeCreateGlobalPrivilege	1700	msdcsc.exe
Token: 33	1700	msdcsc.exe
Token: 34	1700	msdcsc.exe
Token: 35	1700	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1700 msdcsc.exe

pid	process
1700	msdcsc.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 1464 wrote to memory of 1888	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1888	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1888	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1888	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1876	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1876	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1876	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1464 wrote to memory of 1876	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	cmd.exe
PID 1888 wrote to memory of 1600	1888	cmd.exe	attrib.exe
PID 1888 wrote to memory of 1600	1888	cmd.exe	attrib.exe
PID 1888 wrote to memory of 1600	1888	cmd.exe	attrib.exe
PID 1888 wrote to memory of 1600	1888	cmd.exe	attrib.exe
PID 1876 wrote to memory of 1496	1876	cmd.exe	attrib.exe
PID 1876 wrote to memory of 1496	1876	cmd.exe	attrib.exe
PID 1876 wrote to memory of 1496	1876	cmd.exe	attrib.exe
PID 1876 wrote to memory of 1496	1876	cmd.exe	attrib.exe
PID 1464 wrote to memory of 1700	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	msdcsc.exe
PID 1464 wrote to memory of 1700	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	msdcsc.exe
PID 1464 wrote to memory of 1700	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	msdcsc.exe
PID 1464 wrote to memory of 1700	1464	61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe	msdcsc.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	msdcsc.exe	notepad.exe
PID 1700 wrote to memory of 1692	1700	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

1496 attrib.exe
1600 attrib.exe

pid	process
1496	attrib.exe
1600	attrib.exe

C:\Users\Admin\AppData\Local\Temp\61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe
"C:\Users\Admin\AppData\Local\Temp\61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1464

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:1888

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc.exe" +s +h
3⤵
- Sets file to hidden
- 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:1876

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:1496

C:\Users\Admin\AppData\Local\Temp\Windows\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\Windows\msdcsc.exe"
2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- 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:1700

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:1692

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Modify Existing Service

T1031

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Disabling Security Tools

T1089

Hidden Files and Directories

T1158

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Windows\msdcsc.exe
Filesize
658KB

MD5
674f4d8ef4964657adf1aa84d1a4bd22

SHA1
fd837d847f4840edb6cc1218f1ea59a7813bfc96

SHA256
61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc

SHA512
eea4f665c5233d8ecfaecf3fbc59b52d9a5dc62b8ce4d2c17c261d53d75841756df27a1f1ae96d63bcade4bd6213599d92f975d5df809b7669a47ca4a7126d84

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows\msdcsc.exe
Filesize
658KB

MD5
674f4d8ef4964657adf1aa84d1a4bd22

SHA1
fd837d847f4840edb6cc1218f1ea59a7813bfc96

SHA256
61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc

SHA512
eea4f665c5233d8ecfaecf3fbc59b52d9a5dc62b8ce4d2c17c261d53d75841756df27a1f1ae96d63bcade4bd6213599d92f975d5df809b7669a47ca4a7126d84

Download Submit
\Users\Admin\AppData\Local\Temp\Windows\msdcsc.exe
Filesize
658KB

MD5
674f4d8ef4964657adf1aa84d1a4bd22

SHA1
fd837d847f4840edb6cc1218f1ea59a7813bfc96

SHA256
61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc

SHA512
eea4f665c5233d8ecfaecf3fbc59b52d9a5dc62b8ce4d2c17c261d53d75841756df27a1f1ae96d63bcade4bd6213599d92f975d5df809b7669a47ca4a7126d84

Download Submit
\Users\Admin\AppData\Local\Temp\Windows\msdcsc.exe
Filesize
658KB

MD5
674f4d8ef4964657adf1aa84d1a4bd22

SHA1
fd837d847f4840edb6cc1218f1ea59a7813bfc96

SHA256
61aa788c92173825ed5c7898d6b475fb7263851324dd2e0051ef6691a42466dc

SHA512
eea4f665c5233d8ecfaecf3fbc59b52d9a5dc62b8ce4d2c17c261d53d75841756df27a1f1ae96d63bcade4bd6213599d92f975d5df809b7669a47ca4a7126d84

Download Submit
memory/1464-54-0x0000000075021000-0x0000000075023000-memory.dmp

Filesize
8KB

Download
memory/1496-58-0x0000000000000000-mapping.dmp

Download
memory/1600-57-0x0000000000000000-mapping.dmp

Download
memory/1692-65-0x0000000000000000-mapping.dmp

Download
memory/1700-61-0x0000000000000000-mapping.dmp

Download
memory/1876-56-0x0000000000000000-mapping.dmp

Download
memory/1888-55-0x0000000000000000-mapping.dmp

Download