crimsonrat | c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73

Analysis

max time kernel
141s
max time network
149s
platform
windows7_x64
resource
win7-20220414-en
submitted
20/04/2022, 04:18

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General

Target

c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe
Size

59KB
MD5

9882ba138b96b395eea3c3b542633f60
SHA1

185ba36c072edb8ed7494e889e88047808ff2f4f
SHA256

c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73
SHA512

c742360bc636925148f29f00ee7407d485b97c1bcffa40b8f92a885cfe7743ea65195d2842844574828c7720c1381b144755e59ded9eff4a97aa7aa127c0e7f4

Score

10^/10

crimsonrat rat

Malware Config

Signatures

CrimsonRAT Main Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00080000000122e3-57.dat	family_crimsonrat
behavioral1/files/0x00080000000122e3-58.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
1424	ithmrdrvas.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\PROGRA~3\Dhonvdh\ithmrdrvas.exe	c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe
File created	C:\PROGRA~3\Dhonvdh\ithmrdrvas.exe	c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.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 908 wrote to memory of 1424	908	c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe	28
PID 908 wrote to memory of 1424	908	c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe	28
PID 908 wrote to memory of 1424	908	c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe	28

C:\Users\Admin\AppData\Local\Temp\c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe
"C:\Users\Admin\AppData\Local\Temp\c2a635767c84df8471d4f614b9c35b2ba75070b0c9f8c3721fc0aaace79dcc73.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:908
- C:\ProgramData\Dhonvdh\ithmrdrvas.exe
  "C:\ProgramData\Dhonvdh\ithmrdrvas.exe"
  2⤵
  - Executes dropped EXE
  PID:1424

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

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/908-54-0x000007FEF2330000-0x000007FEF33C6000-memory.dmp

Filesize
16.6MB

Download
memory/908-55-0x0000000001DD6000-0x0000000001DF5000-memory.dmp

Filesize
124KB

Download
memory/1424-59-0x000007FEF2330000-0x000007FEF33C6000-memory.dmp

Filesize
16.6MB

Download
memory/1424-60-0x0000000000AE6000-0x0000000000B05000-memory.dmp

Filesize
124KB

Download