9212692346b2607184e7a510ea7dd4700c96cd3c7567a5b7e0aef4fee3635332

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 03:24

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General

Target

2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe
Size

42KB
MD5

0504754cc6c21bcde03258c555ec4e5b
SHA1

ac6e473648af61dba28a033fab6ff9a1263d366a
SHA256

9212692346b2607184e7a510ea7dd4700c96cd3c7567a5b7e0aef4fee3635332
SHA512

3e7241ba4720357ae8d81770af585bf76e6bae7a43a49745b4b360ecad12caa1c64fbc84db85969420c73a4e25c0fe3e7b02e2575d4015fd66dd085ff7b78078
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAx:b/pYayGig5HjS3NPAx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e970-12.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4400	retln.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 4400	1740	2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe	87
PID 1740 wrote to memory of 4400	1740	2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe	87
PID 1740 wrote to memory of 4400	1740	2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_0504754cc6c21bcde03258c555ec4e5b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Filesize
42KB

MD5
618fb51cfedb0b7aeb32f10b76f48742

SHA1
9fd3c5b7df49f1ccd56d93f4b97da84ac47e25c7

SHA256
f8ba8ee12d5532b0bb1b049830eab22b35dbe90f3134129780758dfec4b8f325

SHA512
184ce562d1a9c80b4c3224a502295769c595d13d8d1f956cca60378a2c45187311b84b786d1cdff155f55fdbc51b03089cc61a9b8fe5ed194219c818c73ad85f

Download Submit
memory/1740-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1740-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1740-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4400-21-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download