53b7b9109147dc5771f4556aea304f52fb7dff5e6126cbeb8118bb153628deea

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 12:41

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General

Target

2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe
Size

42KB
MD5

7db4e2ff9ea52819c02d2c2bf683d0c2
SHA1

a9573fbbbd5b5e5961d12d245c335fbc51a43755
SHA256

53b7b9109147dc5771f4556aea304f52fb7dff5e6126cbeb8118bb153628deea
SHA512

6874f74eae99cf0d99ca32621ebf1a92d620f12d64764bb364a4ccfcfcef229f85e5e8a390728ff717910e4b3e22eb94cc19c9e9fb9b71acfdc5343003c4f507
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqtm:bCDOw9aMDooc+vAqtm

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2724-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b0000000232f0-13.dat	CryptoLocker_rule2
behavioral2/memory/2724-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4764-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4764-27-0x0000000008000000-0x000000000800A000-memory.dmp	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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4764	lossy.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 2724 wrote to memory of 4764	2724	2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe	84
PID 2724 wrote to memory of 4764	2724	2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe	84
PID 2724 wrote to memory of 4764	2724	2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_7db4e2ff9ea52819c02d2c2bf683d0c2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2724
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4764

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\lossy.exe

Filesize
42KB

MD5
23681a75eff1d28adb06fd9babac7346

SHA1
5fb1dee3a6c826c30f21d573cd3428aa79826c33

SHA256
3738c03862a999059114c585972e77f7e0e90726f766fadae41d636ffde9c828

SHA512
f29b8e7b8f2031a14b4d5f3948b7bf3f3c49d8c1f7969b197c59ff7a71f1b41bdb2acddbb118a252a1b1490d4190609cedb6c184f7fa79c8add138c7524febf6

Download Submit
memory/2724-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2724-1-0x0000000001F00000-0x0000000001F06000-memory.dmp

Filesize
24KB

Download
memory/2724-2-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2724-9-0x0000000001F00000-0x0000000001F06000-memory.dmp

Filesize
24KB

Download
memory/2724-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4764-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4764-21-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/4764-26-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/4764-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download