darkcomet | bfde67e71eab28fc1cc25eacaf168501dedece8019809821089dec5f86b903e3

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-12-2024 23:21

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General

Target

bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe
Size

683KB
MD5

bfb94a22e0f5045db42f865e693922a5
SHA1

892559195539ad0bac06ad5ee952ce1e3f63b828
SHA256

bfde67e71eab28fc1cc25eacaf168501dedece8019809821089dec5f86b903e3
SHA512

30b37cad07eb65e46f4a1d2314b0bfcea245468ea1e5cf848f5e62fb5dc9f06a7d01ab052aac2085c30c2a4e2d5cb3808c0713e71c715c4f72a3d02b4538abdb
SSDEEP

12288:4HLUMuiv9RgfSjAzRtyzerBfBwUX0v0q5UnZ9c7BeZ1Et3BYuV2AnF2J1Dy:CtAR2erBfBwUg8Z9CeZeBeDI

Score

10^/10

darkcomet discovery persistence rat trojan upx

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

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\\system32\\Windupdt\\winupdate.exe"	server.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	server.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
3968	server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\messenger = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	server.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\messenger = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	notepad.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/4476-37-0x0000000000400000-0x00000000004AD000-memory.dmp	autoit_exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Windupdt\winupdate.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\winupdate.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\	server.exe
File created	C:\Windows\SysWOW64\Windupdt\winupdate.exe	notepad.exe
File created	C:\Windows\SysWOW64\server.exe	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\server.exe	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3968 set thread context of 1740	3968	server.exe	85

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4476-0-0x0000000000400000-0x00000000004AD000-memory.dmp	upx
behavioral2/memory/4476-37-0x0000000000400000-0x00000000004AD000-memory.dmp	upx

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 6 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe

Checks processor information in registry 2 TTPs 8 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	server.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	server.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	server.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1740	explorer.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3968	server.exe
Token: SeSecurityPrivilege	3968	server.exe
Token: SeTakeOwnershipPrivilege	3968	server.exe
Token: SeLoadDriverPrivilege	3968	server.exe
Token: SeSystemProfilePrivilege	3968	server.exe
Token: SeSystemtimePrivilege	3968	server.exe
Token: SeProfSingleProcessPrivilege	3968	server.exe
Token: SeIncBasePriorityPrivilege	3968	server.exe
Token: SeCreatePagefilePrivilege	3968	server.exe
Token: SeBackupPrivilege	3968	server.exe
Token: SeRestorePrivilege	3968	server.exe
Token: SeShutdownPrivilege	3968	server.exe
Token: SeDebugPrivilege	3968	server.exe
Token: SeSystemEnvironmentPrivilege	3968	server.exe
Token: SeChangeNotifyPrivilege	3968	server.exe
Token: SeRemoteShutdownPrivilege	3968	server.exe
Token: SeUndockPrivilege	3968	server.exe
Token: SeManageVolumePrivilege	3968	server.exe
Token: SeImpersonatePrivilege	3968	server.exe
Token: SeCreateGlobalPrivilege	3968	server.exe
Token: 33	3968	server.exe
Token: 34	3968	server.exe
Token: 35	3968	server.exe
Token: 36	3968	server.exe
Token: SeIncreaseQuotaPrivilege	1740	explorer.exe
Token: SeSecurityPrivilege	1740	explorer.exe
Token: SeTakeOwnershipPrivilege	1740	explorer.exe
Token: SeLoadDriverPrivilege	1740	explorer.exe
Token: SeSystemProfilePrivilege	1740	explorer.exe
Token: SeSystemtimePrivilege	1740	explorer.exe
Token: SeProfSingleProcessPrivilege	1740	explorer.exe
Token: SeIncBasePriorityPrivilege	1740	explorer.exe
Token: SeCreatePagefilePrivilege	1740	explorer.exe
Token: SeBackupPrivilege	1740	explorer.exe
Token: SeRestorePrivilege	1740	explorer.exe
Token: SeShutdownPrivilege	1740	explorer.exe
Token: SeDebugPrivilege	1740	explorer.exe
Token: SeSystemEnvironmentPrivilege	1740	explorer.exe
Token: SeChangeNotifyPrivilege	1740	explorer.exe
Token: SeRemoteShutdownPrivilege	1740	explorer.exe
Token: SeUndockPrivilege	1740	explorer.exe
Token: SeManageVolumePrivilege	1740	explorer.exe
Token: SeImpersonatePrivilege	1740	explorer.exe
Token: SeCreateGlobalPrivilege	1740	explorer.exe
Token: 33	1740	explorer.exe
Token: 34	1740	explorer.exe
Token: 35	1740	explorer.exe
Token: 36	1740	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1740	explorer.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4476 wrote to memory of 3968	4476	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe	82
PID 4476 wrote to memory of 3968	4476	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe	82
PID 4476 wrote to memory of 3968	4476	bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe	82
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 4856	3968	server.exe	84
PID 3968 wrote to memory of 1740	3968	server.exe	85
PID 3968 wrote to memory of 1740	3968	server.exe	85
PID 3968 wrote to memory of 1740	3968	server.exe	85
PID 3968 wrote to memory of 1740	3968	server.exe	85
PID 3968 wrote to memory of 1740	3968	server.exe	85
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 3968 wrote to memory of 3356	3968	server.exe	86
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87
PID 1740 wrote to memory of 2132	1740	explorer.exe	87

C:\Users\Admin\AppData\Local\Temp\bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bfb94a22e0f5045db42f865e693922a5_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Windows\SysWOW64\server.exe
  "C:\Windows\SysWOW64\server.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3968
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - Adds Run key to start application
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    PID:4856
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Checks BIOS information in registry
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1740
  - - C:\Windows\SysWOW64\notepad.exe
      C:\Windows\SysWOW64\notepad.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:2132
- - C:\Windows\SysWOW64\notepad.exe
    C:\Windows\SysWOW64\notepad.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3356

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\AppData\Local\Temp\autC8B0.tmp

Filesize
43KB

MD5
c18e9035408a53c4ef4e8d164cbe6585

SHA1
847fdb8725ae7e7f669831cc43b071da6f348196

SHA256
23d26eeb782540c5d4a5c32e544d24b4b53ddcd0703202032a3fd5d6dc4a369a

SHA512
e1dd579222436f0861cc90ef7ed2742cde4a42b310dcd3ea9e7e74ed2df488608377db04443deef0b4f41e24c546cb41a306a2497001b5626103f4aaad28482a

Download Submit
C:\Windows\SysWOW64\server.exe

Filesize
659KB

MD5
e2f8d8d627f63abdae6d2c9d513725eb

SHA1
e0b871cbe0786d9c057595e89c3e54aa7eedd765

SHA256
5d6c4d410c64bafb84ff29f6011c54540b304b19b57ddd179e4321f41aac99f9

SHA512
1ee10bdb74158ef9577ffb994679ca57e1b77cbac61213c91ce6df7314f1bbc395ba243ae65acea30703fcd2863f3353bbfca45d865845ee286553afcaf07f41

Download Submit
memory/1740-31-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-33-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-38-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-26-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-28-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-25-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-29-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-34-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/1740-35-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/2132-32-0x0000000001210000-0x0000000001211000-memory.dmp

Filesize
4KB

Download
memory/3356-27-0x0000000000680000-0x0000000000681000-memory.dmp

Filesize
4KB

Download
memory/3968-20-0x0000000002470000-0x0000000002471000-memory.dmp

Filesize
4KB

Download
memory/3968-30-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/4476-0-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4476-37-0x0000000000400000-0x00000000004AD000-memory.dmp

Filesize
692KB

Download
memory/4856-22-0x0000000000E70000-0x0000000000E71000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads