20b60a59e076bdaeb3a509b7253b910be736a97369b22c7e7ab568b206304650

Analysis

max time kernel
10s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
03-06-2024 03:49

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe
Size

43KB
MD5

da0be173c974de20524378fe27bb5342
SHA1

0055ee621273ee58f2675d8cb278b7682c34d1ff
SHA256

20b60a59e076bdaeb3a509b7253b910be736a97369b22c7e7ab568b206304650
SHA512

7b7d2328870dfabec9af38150226a56d5b68f727ff397d84b96cf4b4ab413382c33d7e2c0992ff56ac41c15137daab5e4ee24c8a1dd36f1d6483bbe19ede7260
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAk:b/pYayGig5HjS3NPAk

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012280-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3060	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1632	2024-06-03_da0be173c974de20524378fe27bb5342_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
1632	2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe
3060	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1632 wrote to memory of 3060	1632	2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe	28
PID 1632 wrote to memory of 3060	1632	2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe	28
PID 1632 wrote to memory of 3060	1632	2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe	28
PID 1632 wrote to memory of 3060	1632	2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-03_da0be173c974de20524378fe27bb5342_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1632
- 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:3060

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
43KB

MD5
c19845a880aed8cd65cd970a697b5272

SHA1
7aa69610a2c3e722ff9c09ef2d41134e70780ed0

SHA256
0d4936082b1dedc9a4446dc3afe999cc5dcf5671f699f06275324572c49286ad

SHA512
e6b740c054b1b9a9fc0e31a728efaf2f61c58ca863828db6e74dbd6d06ea3e0dffc2beb662ce0d453df0f9afe062304691e6c02de8c8cf286cc100c55ef04bd1

Download Submit
memory/1632-0-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/1632-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1632-8-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/3060-23-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download