c49436881502e471e88652290ba7e1f9f3ce9653280ba419d783f618a52e8b7b

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21/05/2024, 08:52

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General

Target

2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe
Size

33KB
MD5

f62acd278577188ad8a7456547cf3140
SHA1

1c6f3a434e6641e3f710c84dc3d171f04eda1c16
SHA256

c49436881502e471e88652290ba7e1f9f3ce9653280ba419d783f618a52e8b7b
SHA512

027f0e0f2aa599e9577d3968b1c81e6bc97b2574c75bac3990b9a7a519a56abf0cffb4d793aa2d0f40fdf093f0c6c90d91e53be4d53cee96f7f12cebeb391db3
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGXvx0:bG74zYcgT/Ekd0ryfjkO

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/560-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233e2-13.dat	CryptoLocker_rule2
behavioral2/memory/4476-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/560-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4476-27-0x0000000008000000-0x000000000800A000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4476	hasfj.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 560 wrote to memory of 4476	560	2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe	82
PID 560 wrote to memory of 4476	560	2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe	82
PID 560 wrote to memory of 4476	560	2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_f62acd278577188ad8a7456547cf3140_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:560
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4476

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\hasfj.exe

Filesize
33KB

MD5
c09cb31f3faf1928d6f6937dc7385de3

SHA1
2fb4edbf2bc08671dbbc133f510f9f4d712cb47b

SHA256
b3dfbe2f27d3a5dcda2ea2ce13d357d2ca89644251f0ef3128be69a4c98b732e

SHA512
baab3146cf85495e835f817f1239b5466f158574f95ca2c01f26c661ca5ba5033bbe074785647c12bb4d41120330f2a75330fba1fd1665e6df0c56bb9bad202e

Download Submit
memory/560-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/560-1-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/560-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/560-9-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/560-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4476-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4476-26-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/4476-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download