0d861d58a3c940bc66be2d598f233cffc59ef2c711b68ba1b63d435a1f2cf610

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13/05/2024, 14:50

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General

Target

2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe
Size

37KB
MD5

45f65b375fc4683a5deab122b8dd5cba
SHA1

a09cba61c82c27807b0ea300cd23f9fe928e747b
SHA256

0d861d58a3c940bc66be2d598f233cffc59ef2c711b68ba1b63d435a1f2cf610
SHA512

6969d9e7d422fc3f5e6ebb7ac57298ae28a33d0da9fef722bb0b8fa214f1bce41a042e5bbc85fea170b6ec42bbc21d3edf80018b25f6ddacd88b5c9abdac9e53
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8INBjP2TwWy:b/yC4GyNM01GuQMNXw2PSj1Pqq8oBjky

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000022f51-12.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3312	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 116 wrote to memory of 3312	116	2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe	82
PID 116 wrote to memory of 3312	116	2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe	82
PID 116 wrote to memory of 3312	116	2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-13_45f65b375fc4683a5deab122b8dd5cba_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:116
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3312

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
38KB

MD5
d5abb17f16fffdbd0ce7ab78a2bcce1b

SHA1
f807c6bfd5118c83dcd97ea0beb4f78bba598673

SHA256
76a137454d0fc026bb43e81adda5765951ee86cec6dfe8b835f30c9681b0461a

SHA512
40520886a533c1e6619ee8fc1e49cf6c1967e8e17e780a29d2d6ddefa078b123eb441b385bebdf4b01c615024070deb20bf090689bb3e7b923faac4cc251ba28

Download Submit
memory/116-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/116-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/116-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3312-25-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download