crimsonrat | f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3

General

Target

f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe
Size

1.1MB
MD5

29fca616297a9c37e800cdc7b654bc6a
SHA1

40e353837ce0924b3b86badabfafe7597929aff9
SHA256

f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3
SHA512

2532bbce592e94a8eac3668da048dc87ccf632cdc65d2edfeda380f767e71f21854fa53354463b1d980fdedeab1ec5ac11f244da035c8f66e9a14397adf0fcb1

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001ab49-120.dat	family_crimsonrat
behavioral2/files/0x000500000001ab49-121.dat	family_crimsonrat

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

Executes dropped EXE 1 IoCs

pid	Process
3596	udhgariwe.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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000_Classes\Local Settings	f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
1012	WINWORD.EXE
1012	WINWORD.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3596	udhgariwe.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
1012	WINWORD.EXE
1012	WINWORD.EXE
1012	WINWORD.EXE
1012	WINWORD.EXE
1012	WINWORD.EXE
1012	WINWORD.EXE
1012	WINWORD.EXE
1012	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 3596	2792	f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe	71
PID 2792 wrote to memory of 3596	2792	f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe	71
PID 2792 wrote to memory of 1012	2792	f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe	72
PID 2792 wrote to memory of 1012	2792	f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe	72

C:\Users\Admin\AppData\Local\Temp\f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe
"C:\Users\Admin\AppData\Local\Temp\f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2792
- C:\ProgramData\Dathlas\udhgariwe.exe
  "C:\ProgramData\Dathlas\udhgariwe.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3596
- C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
  "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\f29895d3fd197101aa284f5076a40e4e951614a7faaf214254488879b2e235f3_6 .docx" /o ""
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:1012

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/1012-124-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Filesize
64KB

Download
memory/1012-125-0x00007FFD79DC0000-0x00007FFD79DD0000-memory.dmp

Filesize
64KB

Download
memory/2792-118-0x0000000000D50000-0x0000000000D52000-memory.dmp

Filesize
8KB

Download
memory/2792-119-0x0000000000D52000-0x0000000000D54000-memory.dmp

Filesize
8KB

Download
memory/3596-122-0x000002A303E10000-0x000002A3047B8000-memory.dmp

Filesize
9.7MB

Download
memory/3596-123-0x000002A304BA0000-0x000002A304BA2000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads