crimsonrat | cd0c624ff748d78e41c851356fbc9cc6945b426f65f64df08c7648eecc88c481

General

Target

cd0c624ff748d78e41c851356fbc9cc6945b426f65f64df08c7648eecc88c481.docm
Size

107KB
MD5

b0e7976f2e3dc8b7636462715740c00e
SHA1

de109f4be750fe0d7ed38300274d1e3b95e9c82a
SHA256

cd0c624ff748d78e41c851356fbc9cc6945b426f65f64df08c7648eecc88c481
SHA512

d76db5979eb9c2493a03298d4536b1be426a8d53710a520b0a33c7ec76bce3ed8118719d71885350331a5d371ad84a2e9947e39affb608eb2087ca1f69e9ea68

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001ab5a-329.dat	family_crimsonrat
behavioral2/files/0x000500000001ab5a-330.dat	family_crimsonrat

CrimsonRat
Crimson RAT is a malware linked to a Pakistani-linked threat actor.
rat crimsonrat

Executes dropped EXE 2 IoCs

pid	Process
3840	vndhragies.exe
1428	nwdhirgaur.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 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\ProcessorNameString	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
2668	WINWORD.EXE
2668	WINWORD.EXE

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE
2668	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2668 wrote to memory of 3840	2668	WINWORD.EXE	71
PID 2668 wrote to memory of 3840	2668	WINWORD.EXE	71
PID 3840 wrote to memory of 1428	3840	vndhragies.exe	72
PID 3840 wrote to memory of 1428	3840	vndhragies.exe	72

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\cd0c624ff748d78e41c851356fbc9cc6945b426f65f64df08c7648eecc88c481.docm" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2668
- C:\ProgramData\Hhlmdvs\vndhragies.exe
  C:\ProgramData\Hhlmdvs\vndhragies.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3840
- - C:\ProgramData\Hblface\nwdhirgaur.exe
    "C:\ProgramData\Hblface\nwdhirgaur.exe"
    3⤵
    - Executes dropped EXE
    PID:1428

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1428-333-0x00000000012D0000-0x00000000012E0000-memory.dmp

Filesize
64KB

Download
memory/1428-332-0x00000000012D0000-0x00000000012E0000-memory.dmp

Filesize
64KB

Download
memory/2668-118-0x00007FFE79D20000-0x00007FFE79D30000-memory.dmp

Filesize
64KB

Download
memory/2668-278-0x000002735B800000-0x000002735B804000-memory.dmp

Filesize
16KB

Download
memory/2668-123-0x00007FFE76C00000-0x00007FFE76C10000-memory.dmp

Filesize
64KB

Download
memory/2668-122-0x00007FFE76C00000-0x00007FFE76C10000-memory.dmp

Filesize
64KB

Download
memory/2668-119-0x00007FFE79D20000-0x00007FFE79D30000-memory.dmp

Filesize
64KB

Download
memory/2668-115-0x00007FFE79D20000-0x00007FFE79D30000-memory.dmp

Filesize
64KB

Download
memory/2668-117-0x00007FFE79D20000-0x00007FFE79D30000-memory.dmp

Filesize
64KB

Download
memory/2668-116-0x00007FFE79D20000-0x00007FFE79D30000-memory.dmp

Filesize
64KB

Download
memory/3840-291-0x0000000002970000-0x0000000002972000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads