crimsonrat | 6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db

Analysis

max time kernel
126s
max time network
146s
platform
windows7_x64
resource
win7-en-20211208
submitted
30/01/2022, 16:09

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General

Target

6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe
Size

1.1MB
MD5

645d2fdc3d638b6e9eeeda9bf7bd332b
SHA1

380150520be6c22ec302d0f89ac1f312a7b2dfa6
SHA256

6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db
SHA512

a1ac538eaf42f522f05c04833d6bdb736489f6c702f5bb74435fcaa5b80241ad9e69a3088e9b16a665d1140cc4d5ba0f8326a6092147b0be93cb9cb705297539

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0006000000012634-58.dat	family_crimsonrat
behavioral1/files/0x0006000000012634-59.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
1804	ntharprmes.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\PROGRA~3\Rharbwd\ntharprmes.exe	6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe
File created	C:\PROGRA~3\Rharbwd\ntharprmes.exe	6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.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 536 wrote to memory of 1804	536	6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe	29
PID 536 wrote to memory of 1804	536	6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe	29
PID 536 wrote to memory of 1804	536	6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe	29

C:\Users\Admin\AppData\Local\Temp\6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe
"C:\Users\Admin\AppData\Local\Temp\6c917faa1a5ea5ae74525ace0c39c4a9208cb48f64372b8cd97c2e6e96a957db.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:536
- C:\ProgramData\Rharbwd\ntharprmes.exe
  "C:\ProgramData\Rharbwd\ntharprmes.exe"
  2⤵
  - Executes dropped EXE
  PID:1804

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/536-55-0x0000000000A90000-0x0000000000A92000-memory.dmp

Filesize
8KB

Download
memory/536-56-0x000007FEF2B90000-0x000007FEF3C26000-memory.dmp

Filesize
16.6MB

Download
memory/536-57-0x0000000000A96000-0x0000000000AB5000-memory.dmp

Filesize
124KB

Download
memory/1804-60-0x000007FEF2B90000-0x000007FEF3C26000-memory.dmp

Filesize
16.6MB

Download
memory/1804-61-0x0000000000B70000-0x0000000000B72000-memory.dmp

Filesize
8KB

Download
memory/1804-62-0x0000000000B76000-0x0000000000B95000-memory.dmp

Filesize
124KB

Download