crimsonrat | 0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0

Analysis

max time kernel
134s
max time network
143s
platform
windows7_x64
resource
win7-en-20211208
submitted
30-01-2022 16:29

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General

Target

0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe
Size

1.0MB
MD5

7cf75ee5180b4896f93b762ea0057e04
SHA1

633004d24a7dca046f10e419cd83728fd6be4a77
SHA256

0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0
SHA512

4019a01efd5be0a0aef9708e4c359147efbdb4066da7f2418ea5632686ddaac29247d201b5cf154276d22dad7c7b8d61523cb049bde9bd6048133a06ee4c1eee

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000700000001221b-59.dat	family_crimsonrat
behavioral1/files/0x000700000001221b-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
384	rvmthgarna.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\PROGRA~3\Dharvdv\rvmthgarna.exe	0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe
File opened for modification	C:\PROGRA~3\Dharvdv\rvmthgarna.exe	0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 384	1624	0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe	27
PID 1624 wrote to memory of 384	1624	0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe	27
PID 1624 wrote to memory of 384	1624	0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe	27

C:\Users\Admin\AppData\Local\Temp\0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe
"C:\Users\Admin\AppData\Local\Temp\0ec4af0779080f9b0b534a6b1b6f1f09ee205cf49a4334046d683d1cce84d3a0.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1624
- C:\ProgramData\Dharvdv\rvmthgarna.exe
  "C:\ProgramData\Dharvdv\rvmthgarna.exe"
  2⤵
  - Executes dropped EXE
  PID:384

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/384-60-0x000007FEF1F60000-0x000007FEF2FF6000-memory.dmp

Filesize
16.6MB

Download
memory/384-61-0x0000000000BC0000-0x0000000000BC2000-memory.dmp

Filesize
8KB

Download
memory/384-62-0x0000000000BC6000-0x0000000000BE5000-memory.dmp

Filesize
124KB

Download
memory/1624-55-0x0000000000B60000-0x0000000000B62000-memory.dmp

Filesize
8KB

Download
memory/1624-56-0x000007FEF1F60000-0x000007FEF2FF6000-memory.dmp

Filesize
16.6MB

Download
memory/1624-57-0x0000000000B66000-0x0000000000B85000-memory.dmp

Filesize
124KB

Download