darkcomet | 21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f

Analysis

max time kernel
156s
max time network
191s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
25/11/2022, 12:02

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General

Target

21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Size

725KB
MD5

3c45aba0cf13fc126080746089671fe5
SHA1

fca0930cc8287ba9b4ea886b04838c08cb8953f6
SHA256

21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f
SHA512

00d0d986472aefa041736acd0fb03bf2046728d59d283fdf95a348d819ba5afc3ad121dc94968915d4b004be396ab8ef1bb6b41735ca9ba5c8cb22a0dcdde9b4
SSDEEP

12288:Q9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLd9Ek5C/hXR:0Z1xuVVjfFoynPaVBUR8f+kN1PEBJR

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

zinou2015.no-ip.org:1604

zinou2015.no-ip.org:200

127.0.0.1:1604

192.168.1.55:1604

Mutex

DC_MUTEX-NEB41P4

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
vy5EsbUCWrFB
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

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"	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

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

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

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

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

Executes dropped EXE 1 IoCs

pid	Process
1120	msdcsc.exe

Loads dropped DLL 2 IoCs

pid	Process
892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe

Windows security modification 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\MSDCSC\\msdcsc.exe"	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\MSDCSC\msdcsc.exe	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
File opened for modification	C:\Windows\MSDCSC\msdcsc.exe	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
File opened for modification	C:\Windows\MSDCSC\	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeSecurityPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeTakeOwnershipPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeLoadDriverPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeSystemProfilePrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeSystemtimePrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeProfSingleProcessPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeIncBasePriorityPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeCreatePagefilePrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeBackupPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeRestorePrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeShutdownPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeDebugPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeSystemEnvironmentPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeChangeNotifyPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeRemoteShutdownPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeUndockPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeManageVolumePrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeImpersonatePrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeCreateGlobalPrivilege	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: 33	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: 34	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: 35	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
Token: SeIncreaseQuotaPrivilege	1120	msdcsc.exe
Token: SeSecurityPrivilege	1120	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1120	msdcsc.exe
Token: SeLoadDriverPrivilege	1120	msdcsc.exe
Token: SeSystemProfilePrivilege	1120	msdcsc.exe
Token: SeSystemtimePrivilege	1120	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1120	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1120	msdcsc.exe
Token: SeCreatePagefilePrivilege	1120	msdcsc.exe
Token: SeBackupPrivilege	1120	msdcsc.exe
Token: SeRestorePrivilege	1120	msdcsc.exe
Token: SeShutdownPrivilege	1120	msdcsc.exe
Token: SeDebugPrivilege	1120	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1120	msdcsc.exe
Token: SeChangeNotifyPrivilege	1120	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1120	msdcsc.exe
Token: SeUndockPrivilege	1120	msdcsc.exe
Token: SeManageVolumePrivilege	1120	msdcsc.exe
Token: SeImpersonatePrivilege	1120	msdcsc.exe
Token: SeCreateGlobalPrivilege	1120	msdcsc.exe
Token: 33	1120	msdcsc.exe
Token: 34	1120	msdcsc.exe
Token: 35	1120	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1120	msdcsc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 892 wrote to memory of 1120	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe	27
PID 892 wrote to memory of 1120	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe	27
PID 892 wrote to memory of 1120	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe	27
PID 892 wrote to memory of 1120	892	21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe	27

C:\Users\Admin\AppData\Local\Temp\21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.exe
"C:\Users\Admin\AppData\Local\Temp\21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f.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:892
- C:\Windows\MSDCSC\msdcsc.exe
  "C:\Windows\MSDCSC\msdcsc.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Windows security bypass
  - Executes dropped EXE
  - Windows security modification
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1120

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\MSDCSC\msdcsc.exe

Filesize
725KB

MD5
3c45aba0cf13fc126080746089671fe5

SHA1
fca0930cc8287ba9b4ea886b04838c08cb8953f6

SHA256
21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f

SHA512
00d0d986472aefa041736acd0fb03bf2046728d59d283fdf95a348d819ba5afc3ad121dc94968915d4b004be396ab8ef1bb6b41735ca9ba5c8cb22a0dcdde9b4

Download Submit
C:\Windows\MSDCSC\msdcsc.exe

Filesize
725KB

MD5
3c45aba0cf13fc126080746089671fe5

SHA1
fca0930cc8287ba9b4ea886b04838c08cb8953f6

SHA256
21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f

SHA512
00d0d986472aefa041736acd0fb03bf2046728d59d283fdf95a348d819ba5afc3ad121dc94968915d4b004be396ab8ef1bb6b41735ca9ba5c8cb22a0dcdde9b4

Download Submit
\Windows\MSDCSC\msdcsc.exe

Filesize
725KB

MD5
3c45aba0cf13fc126080746089671fe5

SHA1
fca0930cc8287ba9b4ea886b04838c08cb8953f6

SHA256
21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f

SHA512
00d0d986472aefa041736acd0fb03bf2046728d59d283fdf95a348d819ba5afc3ad121dc94968915d4b004be396ab8ef1bb6b41735ca9ba5c8cb22a0dcdde9b4

Download Submit
\Windows\MSDCSC\msdcsc.exe

Filesize
725KB

MD5
3c45aba0cf13fc126080746089671fe5

SHA1
fca0930cc8287ba9b4ea886b04838c08cb8953f6

SHA256
21141cac5e3560a73ab9f343f72dcae129c2f635f6a5e9ef1b0918d1df94fa5f

SHA512
00d0d986472aefa041736acd0fb03bf2046728d59d283fdf95a348d819ba5afc3ad121dc94968915d4b004be396ab8ef1bb6b41735ca9ba5c8cb22a0dcdde9b4

Download Submit
memory/892-54-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads