crimsonrat | 4710d1b4feab4e2a66bb0f19f9a0b274a74ddaca72e684bf7ef8b8b9bb05e8a8

Analysis

max time kernel
157s
max time network
134s
platform
windows7_x64
resource
win7-en-20211208
submitted
30-01-2022 15:09

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General

Target

Coast Guard HQ 10.exe
Size

1.0MB
MD5

b7c83538606a08f71107a5202acdb57a
SHA1

4bb1c28653a1754fd71d57d6deb51d281c21b43d
SHA256

7de78f7c806f828ef071a103b7be87636414635e008ea2463bf33077a466140a
SHA512

428fe43f1a9e9b7f81d68ebc1c1df9bd1eae7b25144d39def9f524a0250b39012b6c1d2044d4530d8413039d514da8148847018d216012d5cf560632587e4afd

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000700000001226a-56.dat	family_crimsonrat
behavioral1/files/0x000700000001226a-57.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
1204	rvlrarhsma.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\PROGRA~3\Rellhars\rvlrarhsma.exe	Coast Guard HQ 10.exe
File created	C:\PROGRA~3\Rellhars\rvlrarhsma.exe	Coast Guard HQ 10.exe

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

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1388	AcroRd32.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1388	AcroRd32.exe
1388	AcroRd32.exe
1388	AcroRd32.exe
1388	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 1204	1712	Coast Guard HQ 10.exe	27
PID 1712 wrote to memory of 1204	1712	Coast Guard HQ 10.exe	27
PID 1712 wrote to memory of 1204	1712	Coast Guard HQ 10.exe	27
PID 1712 wrote to memory of 1388	1712	Coast Guard HQ 10.exe	28
PID 1712 wrote to memory of 1388	1712	Coast Guard HQ 10.exe	28
PID 1712 wrote to memory of 1388	1712	Coast Guard HQ 10.exe	28
PID 1712 wrote to memory of 1388	1712	Coast Guard HQ 10.exe	28

C:\Users\Admin\AppData\Local\Temp\Coast Guard HQ 10.exe
"C:\Users\Admin\AppData\Local\Temp\Coast Guard HQ 10.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1712
- C:\ProgramData\Rellhars\rvlrarhsma.exe
  "C:\ProgramData\Rellhars\rvlrarhsma.exe"
  2⤵
  - Executes dropped EXE
  PID:1204
- C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
  "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\Documents\Coast Guard HQ 10-4 .pdf"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:1388

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1204-58-0x0000000002890000-0x0000000002892000-memory.dmp

Filesize
8KB

Download
memory/1204-59-0x000007FEEA990000-0x000007FEEBA26000-memory.dmp

Filesize
16.6MB

Download
memory/1204-61-0x0000000002896000-0x00000000028B5000-memory.dmp

Filesize
124KB

Download
memory/1388-60-0x0000000075D61000-0x0000000075D63000-memory.dmp

Filesize
8KB

Download
memory/1712-54-0x0000000000070000-0x0000000000182000-memory.dmp

Filesize
1.1MB

Download
memory/1712-55-0x000000001B250000-0x000000001B252000-memory.dmp

Filesize
8KB

Download