darkcomet | b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1

Analysis

max time kernel
155s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01-10-2022 23:49

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General

Target

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Size

690KB
MD5

93087bd40c4e1550f856510c08a5f332
SHA1

41349653394e7c8e332b082dce0ded7c61d3a69c
SHA256

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1
SHA512

2c61b745340e9b88d48467f175e3fc4a810b2adf4ee486adec200963ffb579841ead96c8edde0c311cdb979f8639836b63f1bfc1b2d47a07846636ff4964ca7b
SSDEEP

12288:Z9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hqs:jZ1xuVVjfFoynPaVBUR8f+kN10EBx

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

203.192.205.71:80

Mutex

DC_MUTEX-8HQU40W

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
s8dkdk5qgUVM
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:

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.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\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

msdcsc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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

1104 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

4704 attrib.exe
2504 attrib.exe

pid	process
1104	msdcsc.exe

pid	process
4704	attrib.exe
2504	attrib.exe

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:

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.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:

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.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:

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

1104 msdcsc.exe

pid	process
1104	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeSecurityPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeTakeOwnershipPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeLoadDriverPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeSystemProfilePrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeSystemtimePrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeProfSingleProcessPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeIncBasePriorityPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeCreatePagefilePrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeBackupPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeRestorePrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeShutdownPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeDebugPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeSystemEnvironmentPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeChangeNotifyPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeRemoteShutdownPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeUndockPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeManageVolumePrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeImpersonatePrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeCreateGlobalPrivilege	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: 33	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: 34	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: 35	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: 36	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
Token: SeIncreaseQuotaPrivilege	1104	msdcsc.exe
Token: SeSecurityPrivilege	1104	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1104	msdcsc.exe
Token: SeLoadDriverPrivilege	1104	msdcsc.exe
Token: SeSystemProfilePrivilege	1104	msdcsc.exe
Token: SeSystemtimePrivilege	1104	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1104	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1104	msdcsc.exe
Token: SeCreatePagefilePrivilege	1104	msdcsc.exe
Token: SeBackupPrivilege	1104	msdcsc.exe
Token: SeRestorePrivilege	1104	msdcsc.exe
Token: SeShutdownPrivilege	1104	msdcsc.exe
Token: SeDebugPrivilege	1104	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1104	msdcsc.exe
Token: SeChangeNotifyPrivilege	1104	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1104	msdcsc.exe
Token: SeUndockPrivilege	1104	msdcsc.exe
Token: SeManageVolumePrivilege	1104	msdcsc.exe
Token: SeImpersonatePrivilege	1104	msdcsc.exe
Token: SeCreateGlobalPrivilege	1104	msdcsc.exe
Token: 33	1104	msdcsc.exe
Token: 34	1104	msdcsc.exe
Token: 35	1104	msdcsc.exe
Token: 36	1104	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1104 msdcsc.exe

pid	process
1104	msdcsc.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 4928 wrote to memory of 1968	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	cmd.exe
PID 4928 wrote to memory of 1968	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	cmd.exe
PID 4928 wrote to memory of 1968	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	cmd.exe
PID 4928 wrote to memory of 644	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	cmd.exe
PID 4928 wrote to memory of 644	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	cmd.exe
PID 4928 wrote to memory of 644	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	cmd.exe
PID 1968 wrote to memory of 4704	1968	cmd.exe	attrib.exe
PID 1968 wrote to memory of 4704	1968	cmd.exe	attrib.exe
PID 1968 wrote to memory of 4704	1968	cmd.exe	attrib.exe
PID 644 wrote to memory of 2504	644	cmd.exe	attrib.exe
PID 644 wrote to memory of 2504	644	cmd.exe	attrib.exe
PID 644 wrote to memory of 2504	644	cmd.exe	attrib.exe
PID 4928 wrote to memory of 1104	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	msdcsc.exe
PID 4928 wrote to memory of 1104	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	msdcsc.exe
PID 4928 wrote to memory of 1104	4928	b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe	msdcsc.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	msdcsc.exe	notepad.exe
PID 1104 wrote to memory of 100	1104	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

4704 attrib.exe
2504 attrib.exe

pid	process
4704	attrib.exe
2504	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe
"C:\Users\Admin\AppData\Local\Temp\b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4928

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:1968

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4704

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:644

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2504

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1104

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:100

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

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
690KB

MD5
93087bd40c4e1550f856510c08a5f332

SHA1
41349653394e7c8e332b082dce0ded7c61d3a69c

SHA256
b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1

SHA512
2c61b745340e9b88d48467f175e3fc4a810b2adf4ee486adec200963ffb579841ead96c8edde0c311cdb979f8639836b63f1bfc1b2d47a07846636ff4964ca7b

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
690KB

MD5
93087bd40c4e1550f856510c08a5f332

SHA1
41349653394e7c8e332b082dce0ded7c61d3a69c

SHA256
b761254c3627c7839e7dd94cb339699af7c8bd1f6400535afeb86b20190ee0d1

SHA512
2c61b745340e9b88d48467f175e3fc4a810b2adf4ee486adec200963ffb579841ead96c8edde0c311cdb979f8639836b63f1bfc1b2d47a07846636ff4964ca7b

Download Submit
memory/100-139-0x0000000000000000-mapping.dmp

Download
memory/644-133-0x0000000000000000-mapping.dmp

Download
memory/1104-136-0x0000000000000000-mapping.dmp

Download
memory/1968-132-0x0000000000000000-mapping.dmp

Download
memory/2504-135-0x0000000000000000-mapping.dmp

Download
memory/4704-134-0x0000000000000000-mapping.dmp

Download