09198535db95b5fd418893b31db4b52f61408896f90a310ad58aa59f56db06f7

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:25

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe
Size

44KB
MD5

2d3c77623d6440450d82410b4bd7ed10
SHA1

b06d9f78dff098248380c12f1332ff6583b0937b
SHA256

09198535db95b5fd418893b31db4b52f61408896f90a310ad58aa59f56db06f7
SHA512

a6c779539c1598dcd56d76bd6c0563a5a5f55e9be1e359c1ae95fb778ef969e9a3adb847ed4415b3875515badf64f97302f88cfbef759dd4b8f65d35443a0468
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAI:b/pYayGig5HjS3NPAI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\retln.exe	CryptoLocker_rule2

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:

2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

3428 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3428	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe

description	pid	process	target process
PID 1852 wrote to memory of 3428	1852	2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe	retln.exe
PID 1852 wrote to memory of 3428	1852	2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe	retln.exe
PID 1852 wrote to memory of 3428	1852	2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_2d3c77623d6440450d82410b4bd7ed10_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1852

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:3428

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe
Filesize
45KB

MD5
0a3b5ebdeb8c3df6deb8e2e0ad8ac78b

SHA1
a2b07965fb78bfdd478d0931a3a9631414c7041f

SHA256
dfd75bba8adec3ce2a2ea5d023b7c3603273a0a9a823d2706773400d0ba7c7f0

SHA512
62352b8e9e89b74f4a4429de689b72b72db81a99270dad729ed827b9ffb0cdeca0fd41d8d38132b3cd41bfa2e9f7d7b25965eff417462cdfdb13922eb9b369a9

Download Submit
memory/1852-0-0x0000000002020000-0x0000000002026000-memory.dmp

Filesize
24KB

Download
memory/1852-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1852-1-0x0000000002020000-0x0000000002026000-memory.dmp

Filesize
24KB

Download