3f3356b3163529e9591d0734bd3891a2895683eec557ad1b68e44191ef6d7904

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29-04-2024 12:34

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General

Target

2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe
Size

42KB
MD5

7a7146545bac4d4dab3cc6d44374c846
SHA1

af89cdd318370b9620266c14e6847e62e7c6b166
SHA256

3f3356b3163529e9591d0734bd3891a2895683eec557ad1b68e44191ef6d7904
SHA512

1d9a07674da27c991c66454f59784e389329e4d1b68d082d7b24002044d0211ee08c275e2745b3a1c9a3d0462c06b2ac27ccc49d225df136777c486d989138aa
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAv:b/pYayGig5HjS3NPAv

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b52-12.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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1788	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 4948 wrote to memory of 1788	4948	2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe	84
PID 4948 wrote to memory of 1788	4948	2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe	84
PID 4948 wrote to memory of 1788	4948	2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_7a7146545bac4d4dab3cc6d44374c846_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1788

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
8048be8d0a49593e77e7aaf18a09bf54

SHA1
ba353717a40e53483d9b0e766f24544e6d6d0c8a

SHA256
6d8a1e369bff6378c1e906792ab6ef59fc3e898480103f340fb90e54db18f99d

SHA512
d37edb3e7650e5b51e37f15d1fedd7f884c43bdd271df59e400c9be54491137c306519fc3e0db03a3661c6c80f50179894e2e68749b8e73b41bf8c9c6ade89ea

Download Submit
memory/1788-25-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4948-0-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4948-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4948-8-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download