f6bc5f104e5da876e7bf5e6481da3176c7408b0c5f4d328114ae718b19dc58ae

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2024, 19:09

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General

Target

2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe
Size

31KB
MD5

82a126a911af851bbccf5494583f51ce
SHA1

5560fae6b646460539dd40d48984ab498127846f
SHA256

f6bc5f104e5da876e7bf5e6481da3176c7408b0c5f4d328114ae718b19dc58ae
SHA512

42d7bd3cee1a39e1570f7ab2032792b0b44601e93ffa9f4dae15930b1327e407ee43d7a36464adc63a145c5345f655f03fde7ea32b1c481046eccb4ea7094360
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGXvv:bG74zYcgT/Ekd0ryfjkv

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1544-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b90-13.dat	CryptoLocker_rule2
behavioral2/memory/4856-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1544-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4856-27-0x0000000008000000-0x000000000800A000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4856	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 1544 wrote to memory of 4856	1544	2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe	84
PID 1544 wrote to memory of 4856	1544	2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe	84
PID 1544 wrote to memory of 4856	1544	2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_82a126a911af851bbccf5494583f51ce_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1544
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4856

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
31KB

MD5
54cbde494b9d473d2f3ee86395066913

SHA1
627964ae76defb988e607a46b7b3b3db3ac49dba

SHA256
c2d7b7e2ba6d444b2cf03bf051b427ec765ce2a0ed0961ac37c1f9774da98d22

SHA512
60db1a450012472416903cc495a99a6fd557a8ef793340d0ee91f0b8aac70b93e9e1b84b56f46d0d462d30066ee1679aa042706e5a28c3056a3083523488fa96

Download Submit
memory/1544-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1544-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1544-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/1544-8-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/1544-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4856-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4856-20-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4856-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download