crimsonrat | 230705996b567af8b2ed884e6c06cf2cf49a2cf5b4166a01c30d81de857627af

General

Target

230705996b567af8b2ed884e6c06cf2cf49a2cf5b4166a01c30d81de857627af.doc
Size

699KB
MD5

9039772c966690525d843413a752be7e
SHA1

d637f799d3f6a584074eaa12a3ed6da366f5450b
SHA256

230705996b567af8b2ed884e6c06cf2cf49a2cf5b4166a01c30d81de857627af
SHA512

c1efdcbee986075446b9469f828f6c0be71902490e81a3d9e64101aeabfc56220536894eb0a4145c619302a9c674b2a9f5877f5a892da7a8164b207f3050b501

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001ab31-318.dat	family_crimsonrat
behavioral2/files/0x000500000001ab31-319.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
1776	hringarma.exe

Checks processor information in registry 2 TTPs 6 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\~MHz	WINWORD.EXE
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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE

Enumerates system info in registry 2 TTPs 6 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
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

Suspicious behavior: AddClipboardFormatListener 3 IoCs

pid	Process
3704	WINWORD.EXE
3704	WINWORD.EXE
1808	WINWORD.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3704	WINWORD.EXE
3704	WINWORD.EXE

Suspicious use of SetWindowsHookEx 21 IoCs

pid	Process
3704	WINWORD.EXE
3704	WINWORD.EXE
3704	WINWORD.EXE
3704	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
1808	WINWORD.EXE
3704	WINWORD.EXE
1808	WINWORD.EXE
3704	WINWORD.EXE
3704	WINWORD.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3704 wrote to memory of 1776	3704	WINWORD.EXE	71
PID 3704 wrote to memory of 1776	3704	WINWORD.EXE	71
PID 3704 wrote to memory of 1776	3704	WINWORD.EXE	71

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\230705996b567af8b2ed884e6c06cf2cf49a2cf5b4166a01c30d81de857627af.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3704
- C:\ProgramData\Remdias\hringarma.exe
  C:\ProgramData\Remdias\hringarma.exe
  2⤵
  - Executes dropped EXE
  PID:1776

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /Automation -Embedding
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1808

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1776-320-0x0000000002CE0000-0x0000000002CE1000-memory.dmp

Filesize
4KB

Download
memory/1808-335-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/1808-631-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/1808-632-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/1808-633-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/1808-634-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/1808-349-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/1808-340-0x00007FF966FD0000-0x00007FF966FE0000-memory.dmp

Filesize
64KB

Download
memory/1808-339-0x00007FF966FD0000-0x00007FF966FE0000-memory.dmp

Filesize
64KB

Download
memory/1808-336-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/3704-116-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download
memory/3704-117-0x00007FF969B20000-0x00007FF969B30000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads