crimsonrat | 4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e

Analysis

max time kernel
137s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
20-04-2022 04:18

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General

Target

4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe
Size

59KB
MD5

04f60dd495708663a410f38db90a5592
SHA1

b2a517f140c0064dd7384c0aeee0c0471bcad126
SHA256

4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e
SHA512

5058fed79826dc45acd7f77cfd3c080dbd708ddcda565c41d8c9e38bcd5aca9551b426abfe6033301833dd7f98783ff0d8da14b514e820de780295758376ecdc

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/files/0x00060000000231bd-132.dat	family_crimsonrat
behavioral2/files/0x00060000000231bd-133.dat	family_crimsonrat

CrimsonRat
Crimson RAT is a malware linked to a Pakistani-linked threat actor.
rat crimsonrat

Executes dropped EXE 1 IoCs

Processes:

ithmrdrvas.exe

pid	Process
1836	ithmrdrvas.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.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 2 IoCs

Processes:

4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe

description	pid	Process	procid_target
PID 3660 wrote to memory of 1836	3660	4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe	86
PID 3660 wrote to memory of 1836	3660	4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe	86

C:\Users\Admin\AppData\Local\Temp\4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe
"C:\Users\Admin\AppData\Local\Temp\4075ae09b2cad5580286fb104acdbc0bfff1168e1f49057049807af7ec11957e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3660
- C:\ProgramData\Dhonvdh\ithmrdrvas.exe
  "C:\ProgramData\Dhonvdh\ithmrdrvas.exe"
  2⤵
  - Executes dropped EXE
  PID:1836

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Dhonvdh\ithmrdrvas.exe

Filesize
9.3MB

MD5
8930f5a56afe4a9f02c01c6c6b647da0

SHA1
b1000f35e9150d59b0849a662d35f69e67294a51

SHA256
09aaf5e962480a6412c5523f6705489e5aee2f2bd3e42491074b903d0f5d3d3d

SHA512
05ed5347ffd7bfd1692d7f61f1a051d9377710abdd366ef05ca399566d01cb3bb4065a0693f85ca1e5455452ce3cda2a795f73f259ba3158492f2fb62165b1dc

Download Submit
C:\ProgramData\Dhonvdh\ithmrdrvas.exe

Filesize
9.3MB

MD5
8930f5a56afe4a9f02c01c6c6b647da0

SHA1
b1000f35e9150d59b0849a662d35f69e67294a51

SHA256
09aaf5e962480a6412c5523f6705489e5aee2f2bd3e42491074b903d0f5d3d3d

SHA512
05ed5347ffd7bfd1692d7f61f1a051d9377710abdd366ef05ca399566d01cb3bb4065a0693f85ca1e5455452ce3cda2a795f73f259ba3158492f2fb62165b1dc

Download Submit
memory/1836-131-0x0000000000000000-mapping.dmp

Download
memory/1836-134-0x0000000001550000-0x0000000001560000-memory.dmp

Filesize
64KB

Download
memory/1836-136-0x0000000001550000-0x0000000001560000-memory.dmp

Filesize
64KB

Download
memory/3660-130-0x0000000000EE0000-0x0000000000EE2000-memory.dmp

Filesize
8KB

Download
memory/3660-135-0x0000000000EE2000-0x0000000000EE4000-memory.dmp

Filesize
8KB

Download