crimsonrat | bf6705b2148f8f49bfd231de2de8939ad4686f34c0e0f6db7168be3dd8269689

Analysis

max time kernel
153s
max time network
154s
platform
windows7_x64
resource
win7-en-20211208
submitted
21/01/2022, 23:13

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General

Target

cnic.exe
Size

1.1MB
MD5

d13d2599e21ec94b45320ec1ab7511de
SHA1

db0e8a599b37a4b462e380a2be3f0cbd3b8f2ca4
SHA256

706ca8e074ad04777a408b845ed56c1d675902cc2ef0aa6cca29430e967ba7af
SHA512

4982f4b3571878f011e4013558e523ee0a661b55b411b110f835c36bbe286421f7dfb998583efed60e03ae43c646a45574c2aaeb8cce7ef450f204bd4de284c9

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0006000000012608-57.dat	family_crimsonrat
behavioral1/files/0x0006000000012608-58.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
1676	ravighruam.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\PROGRA~3\AdobMR\ravighruam.exe	cnic.exe
File opened for modification	C:\PROGRA~3\AdobMR\ravighruam.exe	cnic.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
608	AcroRd32.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
608	AcroRd32.exe
608	AcroRd32.exe
608	AcroRd32.exe
608	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1776 wrote to memory of 1676	1776	cnic.exe	27
PID 1776 wrote to memory of 1676	1776	cnic.exe	27
PID 1776 wrote to memory of 1676	1776	cnic.exe	27
PID 1776 wrote to memory of 608	1776	cnic.exe	28
PID 1776 wrote to memory of 608	1776	cnic.exe	28
PID 1776 wrote to memory of 608	1776	cnic.exe	28
PID 1776 wrote to memory of 608	1776	cnic.exe	28

C:\Users\Admin\AppData\Local\Temp\cnic.exe
"C:\Users\Admin\AppData\Local\Temp\cnic.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1776
- C:\ProgramData\AdobMR\ravighruam.exe
  "C:\ProgramData\AdobMR\ravighruam.exe"
  2⤵
  - Executes dropped EXE
  PID:1676
- 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\cnic.exe_6 .pdf"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:608

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

Replay Monitor

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Downloads

memory/608-62-0x0000000076C61000-0x0000000076C63000-memory.dmp

Filesize
8KB

Download
memory/1676-59-0x000007FEF2CA0000-0x000007FEF3D36000-memory.dmp

Filesize
16.6MB

Download
memory/1676-61-0x0000000000260000-0x0000000000400000-memory.dmp

Filesize
1.6MB

Download
memory/1676-60-0x0000000000260000-0x0000000000400000-memory.dmp

Filesize
1.6MB

Download
memory/1776-54-0x0000000001FD0000-0x0000000001FD2000-memory.dmp

Filesize
8KB

Download
memory/1776-55-0x000007FEF2CA0000-0x000007FEF3D36000-memory.dmp

Filesize
16.6MB

Download
memory/1776-56-0x0000000001FD6000-0x0000000001FF5000-memory.dmp

Filesize
124KB

Download