darkcomet | 327f07cd24c80890ccb59b357c3b3b43f2677611b79e75a48fea41bd13f9c4bd

General

Target

JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe
Size

308KB
MD5

2f1a1badc1a79faf8a4a0431c263579b
SHA1

1e6e83589b5bfc0d537f133c4700957f24e8f61e
SHA256

327f07cd24c80890ccb59b357c3b3b43f2677611b79e75a48fea41bd13f9c4bd
SHA512

f2011b65ff171f9bd1f345817ca2b762fc67de8daea13fd3c3faf3515f6a21cd5b3fd6bf3634f7bd579dae8cb708d4915a711823b83704ddb5f26d4f9c902a88
SSDEEP

6144:C0M4E7FBVUlcGFpbUY9R+rBywLWbvOm8b8yhKJgobfKycJ4nu:C3bnVUlcGjZWynvLHygLKyuK

Score

10^/10

darkcomet guest16 discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

severfin.no-ip.biz:10111

Mutex

DC_MUTEX-KW3265T

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
cm7bvMvxrvgA
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
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:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	svchost.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
4748	svchost.exe
3560	msdcsc.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Java.exe"	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1216 set thread context of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4748-5-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4748-9-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4748-13-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4748-11-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4748-15-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4748-14-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/4748-31-0x0000000000400000-0x00000000004B7000-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 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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

description	pid	Process
Token: SeDebugPrivilege	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe
Token: SeIncreaseQuotaPrivilege	4748	svchost.exe
Token: SeSecurityPrivilege	4748	svchost.exe
Token: SeTakeOwnershipPrivilege	4748	svchost.exe
Token: SeLoadDriverPrivilege	4748	svchost.exe
Token: SeSystemProfilePrivilege	4748	svchost.exe
Token: SeSystemtimePrivilege	4748	svchost.exe
Token: SeProfSingleProcessPrivilege	4748	svchost.exe
Token: SeIncBasePriorityPrivilege	4748	svchost.exe
Token: SeCreatePagefilePrivilege	4748	svchost.exe
Token: SeBackupPrivilege	4748	svchost.exe
Token: SeRestorePrivilege	4748	svchost.exe
Token: SeShutdownPrivilege	4748	svchost.exe
Token: SeDebugPrivilege	4748	svchost.exe
Token: SeSystemEnvironmentPrivilege	4748	svchost.exe
Token: SeChangeNotifyPrivilege	4748	svchost.exe
Token: SeRemoteShutdownPrivilege	4748	svchost.exe
Token: SeUndockPrivilege	4748	svchost.exe
Token: SeManageVolumePrivilege	4748	svchost.exe
Token: SeImpersonatePrivilege	4748	svchost.exe
Token: SeCreateGlobalPrivilege	4748	svchost.exe
Token: 33	4748	svchost.exe
Token: 34	4748	svchost.exe
Token: 35	4748	svchost.exe
Token: 36	4748	svchost.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 1216 wrote to memory of 4748	1216	JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe	85
PID 4748 wrote to memory of 3560	4748	svchost.exe	86
PID 4748 wrote to memory of 3560	4748	svchost.exe	86
PID 4748 wrote to memory of 3560	4748	svchost.exe	86

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_2f1a1badc1a79faf8a4a0431c263579b.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1216
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\svchost.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4748
- - C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
34KB

MD5
e118330b4629b12368d91b9df6488be0

SHA1
ce90218c7e3b90df2a3409ec253048bb6472c2fd

SHA256
3a0f2936b8c45e8ba3458d69d7859a63844469e698652e15fb56639d32f40cc9

SHA512
ac91c04cb20223dbaaf594440cb778dff36e857921be427c8528ba4c6cdb3e8bf8e71e1ae8af7bde9c04ff5b97b379231625bc1a2b66aba2f98cd340cd8a94b0

Download Submit
memory/1216-0-0x0000000074962000-0x0000000074963000-memory.dmp

Filesize
4KB

Download
memory/1216-1-0x0000000074960000-0x0000000074F11000-memory.dmp

Filesize
5.7MB

Download
memory/1216-2-0x0000000074960000-0x0000000074F11000-memory.dmp

Filesize
5.7MB

Download
memory/1216-18-0x0000000074960000-0x0000000074F11000-memory.dmp

Filesize
5.7MB

Download
memory/4748-13-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4748-9-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4748-11-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4748-15-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4748-14-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4748-16-0x00000000025C0000-0x00000000025C1000-memory.dmp

Filesize
4KB

Download
memory/4748-5-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/4748-31-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads