bac29e0cc20672b8fe80b3f1282037f93fb0a48fa068bc79c1031ddae6dfb9b1

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
04-02-2024 03:30

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General

Target

2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe
Size

40KB
MD5

37eaf28e8d0f5397914213b88f831bf3
SHA1

0ff1d68884d8dc21b49786a28eee53821ebf2d11
SHA256

bac29e0cc20672b8fe80b3f1282037f93fb0a48fa068bc79c1031ddae6dfb9b1
SHA512

7a9d1ac39487aa48b12e77c4226a76acfa109d20cdc27ddaa6fd9a6cf243de590cfebc4981a96759211b27ca8b7cbbd51d1355784e8bb9156e5f9fd47ea4d69b
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAah:b/pYayGig5HjS3NPAq

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023226-12.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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2584	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 4148 wrote to memory of 2584	4148	2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe	86
PID 4148 wrote to memory of 2584	4148	2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe	86
PID 4148 wrote to memory of 2584	4148	2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-04_37eaf28e8d0f5397914213b88f831bf3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2584

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
41KB

MD5
e9fa1a0e8bec07ad0d421ba46063fb45

SHA1
3284318582bcd578ffaca594af0f73921e50343f

SHA256
9b3cffac396fa99456574d56dd31cf8895310c2d80a880630f7173b077003cff

SHA512
1252adec8c1593ed7604d30b33697b0058a6c5bdd1ea4a8f1f0672863640c49990f7ecfdb0f5a0aa9f4381ddc64b3ddc505669d8757771193c3f9081268e2293

Download Submit
memory/2584-20-0x0000000000700000-0x0000000000706000-memory.dmp

Filesize
24KB

Download
memory/4148-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4148-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4148-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download