darkcomet | ccc3f642afaddf0144949679f5228ab215a2784dc814a874b4aba67b22a14c2a

General

Target

JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Size

543KB
MD5

10f08c93a2b6b591e89042bc3f693080
SHA1

d501b8b53904b0b114b75d2951e1fc22c5a99b39
SHA256

ccc3f642afaddf0144949679f5228ab215a2784dc814a874b4aba67b22a14c2a
SHA512

7df55762f1ca3e5ddfab0143fdbb832356598ac1a8984b5e7c97cdcaaa22adabaffc47981b7a10ed189a508566e58bdc03c7b28826bbafab062e65bb1464bc09
SSDEEP

12288:uU63xdWrhwW0vYXeZ9m94tu6nlyYpqtr611s:kTohcvYXCDRpqtrOs

Score

10^/10

darkcomet guest16 discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

darkcometger.zapto.org:21

Mutex

DC_MUTEX-474VLNK

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
Y1zERirQMAyb
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

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:\\Users\\Admin\\Desktop\\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-1-5-21-1170604239-850860757-3112005715-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
4444	svchost.exe
1936	msdcsc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1170604239-850860757-3112005715-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Desktop\\MSDCSC\\msdcsc.exe"	svchost.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4076 set thread context of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4444-12-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral2/memory/4444-9-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral2/memory/4444-13-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral2/memory/4444-15-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral2/memory/4444-16-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral2/memory/4444-17-0x0000000000400000-0x00000000004EA000-memory.dmp	upx
behavioral2/memory/4444-31-0x0000000000400000-0x00000000004EA000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
File created	C:\Windows\assembly\Desktop.ini	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.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 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	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious use of AdjustPrivilegeToken 31 IoCs

description	pid	Process
Token: SeDebugPrivilege	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Token: 33	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Token: SeIncBasePriorityPrivilege	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Token: SeIncreaseQuotaPrivilege	4444	svchost.exe
Token: SeSecurityPrivilege	4444	svchost.exe
Token: SeTakeOwnershipPrivilege	4444	svchost.exe
Token: SeLoadDriverPrivilege	4444	svchost.exe
Token: SeSystemProfilePrivilege	4444	svchost.exe
Token: SeSystemtimePrivilege	4444	svchost.exe
Token: SeProfSingleProcessPrivilege	4444	svchost.exe
Token: SeIncBasePriorityPrivilege	4444	svchost.exe
Token: SeCreatePagefilePrivilege	4444	svchost.exe
Token: SeBackupPrivilege	4444	svchost.exe
Token: SeRestorePrivilege	4444	svchost.exe
Token: SeShutdownPrivilege	4444	svchost.exe
Token: SeDebugPrivilege	4444	svchost.exe
Token: SeSystemEnvironmentPrivilege	4444	svchost.exe
Token: SeChangeNotifyPrivilege	4444	svchost.exe
Token: SeRemoteShutdownPrivilege	4444	svchost.exe
Token: SeUndockPrivilege	4444	svchost.exe
Token: SeManageVolumePrivilege	4444	svchost.exe
Token: SeImpersonatePrivilege	4444	svchost.exe
Token: SeCreateGlobalPrivilege	4444	svchost.exe
Token: 33	4444	svchost.exe
Token: 34	4444	svchost.exe
Token: 35	4444	svchost.exe
Token: 36	4444	svchost.exe
Token: 33	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Token: SeIncBasePriorityPrivilege	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Token: 33	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
Token: SeIncBasePriorityPrivilege	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4076 wrote to memory of 4444	4076	JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe	87
PID 4444 wrote to memory of 1936	4444	svchost.exe	88
PID 4444 wrote to memory of 1936	4444	svchost.exe	88
PID 4444 wrote to memory of 1936	4444	svchost.exe	88

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_10f08c93a2b6b591e89042bc3f693080.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4076
- C:\Users\Admin\AppData\Local\Temp\App\svchost.exe
  C:\Users\Admin\AppData\Local\Temp\\App\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:4444
- - C:\Users\Admin\Desktop\MSDCSC\msdcsc.exe
    "C:\Users\Admin\Desktop\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1936

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\App\svchost.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/4076-0-0x00000000755A2000-0x00000000755A3000-memory.dmp

Filesize
4KB

Download
memory/4076-1-0x00000000755A0000-0x0000000075B51000-memory.dmp

Filesize
5.7MB

Download
memory/4076-2-0x00000000755A0000-0x0000000075B51000-memory.dmp

Filesize
5.7MB

Download
memory/4076-34-0x00000000755A0000-0x0000000075B51000-memory.dmp

Filesize
5.7MB

Download
memory/4076-33-0x00000000755A2000-0x00000000755A3000-memory.dmp

Filesize
4KB

Download
memory/4444-13-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/4444-15-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/4444-16-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/4444-17-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/4444-18-0x00000000025E0000-0x00000000025E1000-memory.dmp

Filesize
4KB

Download
memory/4444-31-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/4444-9-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download
memory/4444-12-0x0000000000400000-0x00000000004EA000-memory.dmp

Filesize
936KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads