d00d15e8d056df5922602481f235467b1503654ea2c42c5422816d368e2010b0

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 12:31

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General

Target

2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe
Size

40KB
MD5

a23b16b7fe8a993891f28c68d0a6d857
SHA1

c195d3138ae494844c04a6df1248e22ea516277b
SHA256

d00d15e8d056df5922602481f235467b1503654ea2c42c5422816d368e2010b0
SHA512

9f8c8e4b07198b428e64507f7e589da301a402dfd36d5622ccb29e708aa4621f86066a0162cda77b70efaae21702df43903e457471026824267f6d40587d1c80
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAI:b/pYayGig5HjS3NPAI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023208-12.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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1608	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 1544 wrote to memory of 1608	1544	2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe	85
PID 1544 wrote to memory of 1608	1544	2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe	85
PID 1544 wrote to memory of 1608	1544	2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_a23b16b7fe8a993891f28c68d0a6d857_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1544
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1608

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
40KB

MD5
69a03b18074bafa6237ee867cec8ab3f

SHA1
ea7fc4ef10593f30bfb968138b77c957dbea68e3

SHA256
e7578d0265c81f99437ed63243d00443a4c416b9136c10c96cf26a589e52493c

SHA512
304c9c6a231bb634d4c321848827f734dc69baabc52376d96727f1880032f8a5271fed225d35143a47e42f83bde8819d54a07286c56a5842a731e7ffc49f2229

Download Submit
memory/1544-0-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1544-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1544-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/1608-20-0x0000000002020000-0x0000000002026000-memory.dmp

Filesize
24KB

Download