160a48216060c0c84241ef6376f8b735b9742dc1a54020749533a0f6f2247506

Analysis

max time kernel
14s
max time network
123s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
21/05/2024, 15:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
Size

33KB
MD5

3c88f406b1be6fb307748c01057ad6a1
SHA1

63c5207a2186771ed516e6789712cf75e915814d
SHA256

160a48216060c0c84241ef6376f8b735b9742dc1a54020749533a0f6f2247506
SHA512

daabe2e1ee2ef6bdbb72b78365311140777dc3609fcce30613e24e3af2c42b805462360c70b1d739f2d585655c8b060c765168dca656c29c5ee754eae9c48f24
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcs828:b/yC4GyNM01GuQMNXw2PSjSKkc9X

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c00000001315b-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2520	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2220	2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2220	2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
2520	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2520	2220	2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe	28
PID 2220 wrote to memory of 2520	2220	2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe	28
PID 2220 wrote to memory of 2520	2220	2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe	28
PID 2220 wrote to memory of 2520	2220	2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c88f406b1be6fb307748c01057ad6a1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
34KB

MD5
fdc8cd75175c26adb5ffbb8ae478761e

SHA1
9d800feed23d052ab7529689395e876ddc7d393f

SHA256
17208e1155e3d82328f1077b72b7622b072f2dc11338c969b7598ff0ea132765

SHA512
9430c2175cb80bff25e60e9eaa53a3a9623c5b6dd2cdd1eb66d3fa4ad8df73683d15eeafd5e1d56076251c96ec8b834f61fcce6cf1ccecefa5f84aac29dfbb2f

Download Submit
memory/2220-0-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/2220-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2220-8-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/2520-23-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download