crimsonrat | 11c45925b64777eaa401a6c0f6a6f847fb80e82d8da8fdfe1156d28663fd9396

General

Target

11c45925b64777eaa401a6c0f6a6f847fb80e82d8da8fdfe1156d28663fd9396.doc
Size

3.0MB
MD5

d851a1c634cd8a63d9dcf0db5b84b200
SHA1

3208d7bc352771507837e075586e83216cc61be5
SHA256

11c45925b64777eaa401a6c0f6a6f847fb80e82d8da8fdfe1156d28663fd9396
SHA512

12444b6ade5beb5f658ade2553013eac17a8e766bf210e3914b0393ab2252752c89ca3c33705008916895d8ad070f8c8279d63e3eedb2323354c6c1d0a8a9a06

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000600000001ab65-293.dat	family_crimsonrat
behavioral2/files/0x000600000001ab65-294.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
3436	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
3572	WINWORD.EXE
3572	WINWORD.EXE
528	WINWORD.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3572	WINWORD.EXE
3572	WINWORD.EXE

Suspicious use of SetWindowsHookEx 23 IoCs

pid	Process
3572	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
528	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE
3572	WINWORD.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3572 wrote to memory of 3436	3572	WINWORD.EXE	73
PID 3572 wrote to memory of 3436	3572	WINWORD.EXE	73
PID 3572 wrote to memory of 3436	3572	WINWORD.EXE	73

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\11c45925b64777eaa401a6c0f6a6f847fb80e82d8da8fdfe1156d28663fd9396.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:3572
- C:\ProgramData\Remdias\hringarma.exe
  C:\ProgramData\Remdias\hringarma.exe
  2⤵
  - Executes dropped EXE
  PID:3436

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:528

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

Replay Monitor

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Downloads

memory/528-532-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/528-534-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/528-533-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/528-531-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/3436-295-0x0000000003C20000-0x0000000003C21000-memory.dmp

Filesize
4KB

Download
memory/3572-115-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/3572-259-0x0000016CE5530000-0x0000016CE5534000-memory.dmp

Filesize
16KB

Download
memory/3572-124-0x00007FF86F1F0000-0x00007FF86F200000-memory.dmp

Filesize
64KB

Download
memory/3572-122-0x00007FF86F1F0000-0x00007FF86F200000-memory.dmp

Filesize
64KB

Download
memory/3572-119-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/3572-118-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/3572-117-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download
memory/3572-116-0x00007FF8726E0000-0x00007FF8726F0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads