darkcomet | b318e5a667e00640834bb2838ecafff4f4675f70353a316a18b8a977f5b16ede

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
22-08-2024 18:45

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General

Target

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Size

284KB
MD5

b8b8d03a76d2958751fb424687274111
SHA1

c173daff1d63b0fa6d0197274f36e4873641b18e
SHA256

b318e5a667e00640834bb2838ecafff4f4675f70353a316a18b8a977f5b16ede
SHA512

b28fe05e20356d3c363e7d0f939cbde56621436870d1bdf5a40a1e2f3d8a6ab25bb7d54c13b2aebb0212008fc7da3d2bba13f10980c4992b3831f76a85744897
SSDEEP

6144:zD7cY2fgssM7Wirg9KXylmRiL+QMeC/i6isqX7UovnONztByipwxZLC:zl8E4w5huat7UovONzbXwnC

Score

10^/10

darkcomet latentbot windowsupdate discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

WindowsUpdate

darkcomet30.zapto.org:1604

Mutex

DC_MUTEX-HWJ5RPM

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
u8WfmXdmtQFA
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

Extracted

Family

latentbot

darkcomet30.zapto.org

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
LatentBot
Modular trojan written in Delphi which has been in-the-wild since 2013.
trojan latentbot

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.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"	b8b8d03a76d2958751fb424687274111_JaffaCakes118.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:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid	Process
1552	msdcsc.exe

UPX packed file 18 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2696-0-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/files/0x000700000002340d-6.dat	upx
behavioral2/memory/2696-15-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-17-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-18-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-19-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-20-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-21-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-22-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-23-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-24-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-25-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-26-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-27-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-28-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-29-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-30-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral2/memory/1552-31-0x0000000000400000-0x00000000004CA000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exemsdcsc.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exemsdcsc.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSecurityPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSystemtimePrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeBackupPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeRestorePrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeShutdownPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeDebugPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeUndockPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeManageVolumePrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeImpersonatePrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 33	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 34	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 35	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 36	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	1552	msdcsc.exe
Token: SeSecurityPrivilege	1552	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1552	msdcsc.exe
Token: SeLoadDriverPrivilege	1552	msdcsc.exe
Token: SeSystemProfilePrivilege	1552	msdcsc.exe
Token: SeSystemtimePrivilege	1552	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1552	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1552	msdcsc.exe
Token: SeCreatePagefilePrivilege	1552	msdcsc.exe
Token: SeBackupPrivilege	1552	msdcsc.exe
Token: SeRestorePrivilege	1552	msdcsc.exe
Token: SeShutdownPrivilege	1552	msdcsc.exe
Token: SeDebugPrivilege	1552	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1552	msdcsc.exe
Token: SeChangeNotifyPrivilege	1552	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1552	msdcsc.exe
Token: SeUndockPrivilege	1552	msdcsc.exe
Token: SeManageVolumePrivilege	1552	msdcsc.exe
Token: SeImpersonatePrivilege	1552	msdcsc.exe
Token: SeCreateGlobalPrivilege	1552	msdcsc.exe
Token: 33	1552	msdcsc.exe
Token: 34	1552	msdcsc.exe
Token: 35	1552	msdcsc.exe
Token: 36	1552	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid	Process
1552	msdcsc.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

description	pid	Process	procid_target
PID 2696 wrote to memory of 1552	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	95
PID 2696 wrote to memory of 1552	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	95
PID 2696 wrote to memory of 1552	2696	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	95

C:\Users\Admin\AppData\Local\Temp\b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2696
- C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
  "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1552

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
284KB

MD5
b8b8d03a76d2958751fb424687274111

SHA1
c173daff1d63b0fa6d0197274f36e4873641b18e

SHA256
b318e5a667e00640834bb2838ecafff4f4675f70353a316a18b8a977f5b16ede

SHA512
b28fe05e20356d3c363e7d0f939cbde56621436870d1bdf5a40a1e2f3d8a6ab25bb7d54c13b2aebb0212008fc7da3d2bba13f10980c4992b3831f76a85744897

Download Submit
memory/1552-22-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-31-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-21-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-16-0x00000000005B0000-0x00000000005B1000-memory.dmp

Filesize
4KB

Download
memory/1552-17-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-18-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-19-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-20-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-30-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-29-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-24-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-23-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-25-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-26-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-27-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1552-28-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2696-1-0x00000000006B0000-0x00000000006B1000-memory.dmp

Filesize
4KB

Download
memory/2696-15-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2696-0-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download