darkcomet | c90479e3c119aeeb0f48e665d648033ce8e7125a345ce78f7b71c12cf55f3720

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/02/2025, 01:45

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General

Target

JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Size

789KB
MD5

21d622626b25c17e938eb187443407a2
SHA1

43f935f2449c40b024f664f94c2b523f783f77aa
SHA256

c90479e3c119aeeb0f48e665d648033ce8e7125a345ce78f7b71c12cf55f3720
SHA512

b396032b3f78e37bdddf5b3c7c853d9c5ad9ef9171305d7f0684709f25a5142fe155f2c4c8e1c0f7e13e0f0193dbcab5d1ecb13375718a4262ce66ecadac4bcf
SSDEEP

24576:ej1Q2vvcjNrMbwT67tUP/3mXJYX7TwBimh/F2x:c1Q2vkjN4e6JUP/3YiXHaiAAx

Score

10^/10

darkcomet runescape discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

RUNESCAPE

kaizuma911.zapto.org:1604

Mutex

DC_MUTEX-JLH7DEA

Attributes

InstallPath
Windupdt\winupdate.exe
gencode
q8D�XJAZmQgV
install
true
offline_keylogger
true
persistence
false
reg_key
winupdater

rc4.plain

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"	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe

Checks BIOS information in registry 2 TTPs 1 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	JaffaCakes118_21d622626b25c17e938eb187443407a2.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-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\system32\\Windupdt\\winupdate.exe"	notepad.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Windupdt\winupdate.exe	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\winupdate.exe	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
File opened for modification	C:\Windows\SysWOW64\Windupdt\winupdate.exe	notepad.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2504 set thread context of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2504-0-0x0000000000400000-0x00000000004EC000-memory.dmp	upx
behavioral1/memory/2504-9-0x0000000000400000-0x00000000004EC000-memory.dmp	upx
behavioral1/files/0x000c0000000122e0-39.dat	upx

System Location Discovery: System Language Discovery 1 TTPs 3 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	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeSecurityPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeTakeOwnershipPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeLoadDriverPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeSystemProfilePrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeSystemtimePrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeProfSingleProcessPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeIncBasePriorityPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeCreatePagefilePrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeBackupPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeRestorePrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeShutdownPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeDebugPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeSystemEnvironmentPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeChangeNotifyPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeRemoteShutdownPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeUndockPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeManageVolumePrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeImpersonatePrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: SeCreateGlobalPrivilege	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: 33	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: 34	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
Token: 35	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 2504 wrote to memory of 3060	2504	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	31
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2300	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	32
PID 3060 wrote to memory of 2752	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	33
PID 3060 wrote to memory of 2752	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	33
PID 3060 wrote to memory of 2752	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	33
PID 3060 wrote to memory of 2752	3060	JaffaCakes118_21d622626b25c17e938eb187443407a2.exe	33

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_21d622626b25c17e938eb187443407a2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_21d622626b25c17e938eb187443407a2.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_21d622626b25c17e938eb187443407a2.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Adds Run key to start application
  - Drops file in System32 directory
  - 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:3060
- - 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:2300
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:2752

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:\Windows\SysWOW64\Windupdt\winupdate.exe

Filesize
789KB

MD5
21d622626b25c17e938eb187443407a2

SHA1
43f935f2449c40b024f664f94c2b523f783f77aa

SHA256
c90479e3c119aeeb0f48e665d648033ce8e7125a345ce78f7b71c12cf55f3720

SHA512
b396032b3f78e37bdddf5b3c7c853d9c5ad9ef9171305d7f0684709f25a5142fe155f2c4c8e1c0f7e13e0f0193dbcab5d1ecb13375718a4262ce66ecadac4bcf

Download Submit
memory/2300-36-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/2300-14-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/2504-9-0x0000000000400000-0x00000000004EC000-memory.dmp

Filesize
944KB

Download
memory/2504-0-0x0000000000400000-0x00000000004EC000-memory.dmp

Filesize
944KB

Download
memory/3060-6-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/3060-10-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/3060-12-0x0000000001C60000-0x0000000001C61000-memory.dmp

Filesize
4KB

Download
memory/3060-11-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/3060-7-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/3060-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3060-3-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download
memory/3060-42-0x0000000013140000-0x00000000131F6000-memory.dmp

Filesize
728KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads