crimsonrat | 071c2ac354452d484a37e7af15dd4685061dd4af93abad4308f41df673132ff0

General

Target

071c2ac354452d484a37e7af15dd4685061dd4af93abad4308f41df673132ff0.doc
Size

529KB
MD5

4c0e752600746b6d67cf1d49c103d64a
SHA1

438850c4611c409e816f6981569b6a1ed68d2720
SHA256

071c2ac354452d484a37e7af15dd4685061dd4af93abad4308f41df673132ff0
SHA512

fd0b993c7595751c7eff2a288b3503f4d16fb7466c65bc224abbc902b722082878c24ccfc8a8b8c24f52f8248996af13642092a0c5e5ebf2def60d78d5ebb811

Score

10^/10

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000001ab33-441.dat	family_crimsonrat
behavioral2/files/0x000500000001ab33-442.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
1296	ndnextgen.exe

Deletes itself 1 IoCs

pid	Process
3448	WINWORD.EXE

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

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\~WRD0000.tmp\:Zone.Identifier:$DATA	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
3448	WINWORD.EXE
3448	WINWORD.EXE

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3448	WINWORD.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

pid	Process
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE
3448	WINWORD.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3448 wrote to memory of 1296	3448	WINWORD.EXE	71
PID 3448 wrote to memory of 1296	3448	WINWORD.EXE	71
PID 3448 wrote to memory of 1296	3448	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\071c2ac354452d484a37e7af15dd4685061dd4af93abad4308f41df673132ff0.doc" /o ""
1⤵
- Deletes itself
- Checks processor information in registry
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: RenamesItself
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3448
- C:\ProgramData\Fdlrob\ndnextgen.exe
  C:\ProgramData\Fdlrob\ndnextgen.exe
  2⤵
  - Executes dropped EXE
  PID:1296

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

Loading Replay Monitor...

Downloads

memory/1296-443-0x0000000002AF0000-0x0000000002AF1000-memory.dmp

Filesize
4KB

Download
memory/3448-115-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Filesize
64KB

Download
memory/3448-116-0x00007FFE0CBA0000-0x00007FFE0CBB0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads