darkcomet | 9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
25-07-2022 00:13

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General

Target

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Size

253KB
MD5

c46471072e24a8522a63f1ce3196c75e
SHA1

f33ed92ed09fe3f731cff93bf36c651fecc51d35
SHA256

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6
SHA512

d0b69024301ba28be9efa5c75bca6bc345c50711cbd9e31563bf65c972df21165f92166689b94cb980fbaade47e1b7708d80fe9c3f85003067a4710e547637b2

Score

10^/10

darkcomet guest16 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

letomaniydh.ddns.net:1604

letomaniydh.ddns.net:27015

192.168.0.47:27015

Mutex

DC_MUTEX-3F06PJ9

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
Jnj0qClCtnH3
install
true
offline_keylogger
false
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:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.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"	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.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-1-5-21-2660308776-3705150086-26593515-1000\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

880 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

2296 attrib.exe
4768 attrib.exe

pid	process
880	msdcsc.exe

pid	process
2296	attrib.exe
4768	attrib.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4688-133-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
C:\Windows\MSDCSC\msdcsc.exe	upx
C:\Windows\MSDCSC\msdcsc.exe	upx
behavioral2/memory/880-138-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral2/memory/880-141-0x0000000000400000-0x00000000004BA000-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:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.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 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\MSDCSC\\msdcsc.exe"	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe

Drops file in Windows directory 3 IoCs

Processes:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe

description	ioc	process
File created	C:\Windows\MSDCSC\msdcsc.exe	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
File opened for modification	C:\Windows\MSDCSC\msdcsc.exe	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
File opened for modification	C:\Windows\MSDCSC\	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.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:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

880 msdcsc.exe

pid	process
880	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeSecurityPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeTakeOwnershipPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeLoadDriverPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeSystemProfilePrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeSystemtimePrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeProfSingleProcessPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeIncBasePriorityPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeCreatePagefilePrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeBackupPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeRestorePrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeShutdownPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeDebugPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeSystemEnvironmentPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeChangeNotifyPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeRemoteShutdownPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeUndockPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeManageVolumePrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeImpersonatePrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeCreateGlobalPrivilege	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: 33	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: 34	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: 35	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: 36	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
Token: SeIncreaseQuotaPrivilege	880	msdcsc.exe
Token: SeSecurityPrivilege	880	msdcsc.exe
Token: SeTakeOwnershipPrivilege	880	msdcsc.exe
Token: SeLoadDriverPrivilege	880	msdcsc.exe
Token: SeSystemProfilePrivilege	880	msdcsc.exe
Token: SeSystemtimePrivilege	880	msdcsc.exe
Token: SeProfSingleProcessPrivilege	880	msdcsc.exe
Token: SeIncBasePriorityPrivilege	880	msdcsc.exe
Token: SeCreatePagefilePrivilege	880	msdcsc.exe
Token: SeBackupPrivilege	880	msdcsc.exe
Token: SeRestorePrivilege	880	msdcsc.exe
Token: SeShutdownPrivilege	880	msdcsc.exe
Token: SeDebugPrivilege	880	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	880	msdcsc.exe
Token: SeChangeNotifyPrivilege	880	msdcsc.exe
Token: SeRemoteShutdownPrivilege	880	msdcsc.exe
Token: SeUndockPrivilege	880	msdcsc.exe
Token: SeManageVolumePrivilege	880	msdcsc.exe
Token: SeImpersonatePrivilege	880	msdcsc.exe
Token: SeCreateGlobalPrivilege	880	msdcsc.exe
Token: 33	880	msdcsc.exe
Token: 34	880	msdcsc.exe
Token: 35	880	msdcsc.exe
Token: 36	880	msdcsc.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 4688 wrote to memory of 1204	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	cmd.exe
PID 4688 wrote to memory of 1204	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	cmd.exe
PID 4688 wrote to memory of 1204	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	cmd.exe
PID 4688 wrote to memory of 5048	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	cmd.exe
PID 4688 wrote to memory of 5048	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	cmd.exe
PID 4688 wrote to memory of 5048	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	cmd.exe
PID 1204 wrote to memory of 2296	1204	cmd.exe	attrib.exe
PID 1204 wrote to memory of 2296	1204	cmd.exe	attrib.exe
PID 1204 wrote to memory of 2296	1204	cmd.exe	attrib.exe
PID 5048 wrote to memory of 4768	5048	cmd.exe	attrib.exe
PID 5048 wrote to memory of 4768	5048	cmd.exe	attrib.exe
PID 5048 wrote to memory of 4768	5048	cmd.exe	attrib.exe
PID 4688 wrote to memory of 880	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	msdcsc.exe
PID 4688 wrote to memory of 880	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	msdcsc.exe
PID 4688 wrote to memory of 880	4688	9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe	msdcsc.exe
PID 880 wrote to memory of 4188	880	msdcsc.exe	iexplore.exe
PID 880 wrote to memory of 4188	880	msdcsc.exe	iexplore.exe
PID 880 wrote to memory of 4188	880	msdcsc.exe	iexplore.exe
PID 880 wrote to memory of 4204	880	msdcsc.exe	explorer.exe
PID 880 wrote to memory of 4204	880	msdcsc.exe	explorer.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	msdcsc.exe	notepad.exe
PID 880 wrote to memory of 4156	880	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

2296 attrib.exe
4768 attrib.exe

pid	process
2296	attrib.exe
4768	attrib.exe

C:\Users\Admin\AppData\Local\Temp\9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe
"C:\Users\Admin\AppData\Local\Temp\9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4688

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:1204

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2296

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:5048

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4768

C:\Windows\MSDCSC\msdcsc.exe
"C:\Windows\MSDCSC\msdcsc.exe"
2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:880

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
3⤵
PID:4188

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
3⤵
PID:4204

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:4156

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Windows\MSDCSC\msdcsc.exe
Filesize
253KB

MD5
c46471072e24a8522a63f1ce3196c75e

SHA1
f33ed92ed09fe3f731cff93bf36c651fecc51d35

SHA256
9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6

SHA512
d0b69024301ba28be9efa5c75bca6bc345c50711cbd9e31563bf65c972df21165f92166689b94cb980fbaade47e1b7708d80fe9c3f85003067a4710e547637b2

Download Submit
C:\Windows\MSDCSC\msdcsc.exe
Filesize
253KB

MD5
c46471072e24a8522a63f1ce3196c75e

SHA1
f33ed92ed09fe3f731cff93bf36c651fecc51d35

SHA256
9dba654fc2787dcfaddb3aeb91a6439dc90426b4018314fff12e849ad55425a6

SHA512
d0b69024301ba28be9efa5c75bca6bc345c50711cbd9e31563bf65c972df21165f92166689b94cb980fbaade47e1b7708d80fe9c3f85003067a4710e547637b2

Download Submit
memory/880-135-0x0000000000000000-mapping.dmp

Download
memory/880-138-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/880-141-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1204-130-0x0000000000000000-mapping.dmp

Download
memory/2296-132-0x0000000000000000-mapping.dmp

Download
memory/4156-140-0x0000000000000000-mapping.dmp

Download
memory/4204-139-0x0000000000000000-mapping.dmp

Download
memory/4688-133-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/4768-134-0x0000000000000000-mapping.dmp

Download
memory/5048-131-0x0000000000000000-mapping.dmp

Download