darkcomet | b318e5a667e00640834bb2838ecafff4f4675f70353a316a18b8a977f5b16ede

Analysis

max time kernel
149s
max time network
122s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-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

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid	Process
896	msdcsc.exe

Loads dropped DLL 2 IoCs

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

pid	Process
1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

UPX packed file 20 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1772-0-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/files/0x000b000000018671-5.dat	upx
behavioral1/memory/896-16-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/1772-13-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/1772-11-0x00000000037C0000-0x000000000388A000-memory.dmp	upx
behavioral1/memory/896-18-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-19-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-21-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-22-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-23-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-24-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-25-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-26-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-27-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-28-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-29-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-30-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-31-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-32-0x0000000000400000-0x00000000004CA000-memory.dmp	upx
behavioral1/memory/896-33-0x0000000000400000-0x00000000004CA000-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-1-5-21-3294248377-1418901787-4083263181-1000\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 46 IoCs

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exemsdcsc.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSecurityPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSystemtimePrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeBackupPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeRestorePrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeShutdownPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeDebugPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeUndockPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeManageVolumePrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeImpersonatePrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 33	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 34	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: 35	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	896	msdcsc.exe
Token: SeSecurityPrivilege	896	msdcsc.exe
Token: SeTakeOwnershipPrivilege	896	msdcsc.exe
Token: SeLoadDriverPrivilege	896	msdcsc.exe
Token: SeSystemProfilePrivilege	896	msdcsc.exe
Token: SeSystemtimePrivilege	896	msdcsc.exe
Token: SeProfSingleProcessPrivilege	896	msdcsc.exe
Token: SeIncBasePriorityPrivilege	896	msdcsc.exe
Token: SeCreatePagefilePrivilege	896	msdcsc.exe
Token: SeBackupPrivilege	896	msdcsc.exe
Token: SeRestorePrivilege	896	msdcsc.exe
Token: SeShutdownPrivilege	896	msdcsc.exe
Token: SeDebugPrivilege	896	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	896	msdcsc.exe
Token: SeChangeNotifyPrivilege	896	msdcsc.exe
Token: SeRemoteShutdownPrivilege	896	msdcsc.exe
Token: SeUndockPrivilege	896	msdcsc.exe
Token: SeManageVolumePrivilege	896	msdcsc.exe
Token: SeImpersonatePrivilege	896	msdcsc.exe
Token: SeCreateGlobalPrivilege	896	msdcsc.exe
Token: 33	896	msdcsc.exe
Token: 34	896	msdcsc.exe
Token: 35	896	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid	Process
896	msdcsc.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe

description	pid	Process	procid_target
PID 1772 wrote to memory of 896	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	31
PID 1772 wrote to memory of 896	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	31
PID 1772 wrote to memory of 896	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	31
PID 1772 wrote to memory of 896	1772	b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b8b8d03a76d2958751fb424687274111_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1772
- 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:896

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
284KB

MD5
b8b8d03a76d2958751fb424687274111

SHA1
c173daff1d63b0fa6d0197274f36e4873641b18e

SHA256
b318e5a667e00640834bb2838ecafff4f4675f70353a316a18b8a977f5b16ede

SHA512
b28fe05e20356d3c363e7d0f939cbde56621436870d1bdf5a40a1e2f3d8a6ab25bb7d54c13b2aebb0212008fc7da3d2bba13f10980c4992b3831f76a85744897

Download Submit
memory/896-28-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-33-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-21-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-16-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-22-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-32-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-17-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/896-18-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-20-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/896-23-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-31-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-30-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-19-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-24-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-25-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-26-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-27-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/896-29-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1772-0-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/1772-1-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/1772-15-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/1772-11-0x00000000037C0000-0x000000000388A000-memory.dmp

Filesize
808KB

Download
memory/1772-13-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download