c1b0b73522044590f0305ede558de83733d28285fba05b0a84d6b34d3bed5843

Analysis

max time kernel
150s
max time network
146s
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 14:27

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General

Target

2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe
Size

32KB
MD5

7751e6ea23103e588776ab9035d9b6a5
SHA1

a3601388ee42685f2a156a3e96e7fc957e29d199
SHA256

c1b0b73522044590f0305ede558de83733d28285fba05b0a84d6b34d3bed5843
SHA512

e3596cfcb814fe0e49ef75c48e5aba44cd15cc95196cc58ffcce952513a5c7dba3eb3a3e12ea03a8010db80c1bf1c265657df77f424a1a6f93848cc55e3c1b43
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGXvx9:bG74zYcgT/Ekd0ryfjkL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1652-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/1652-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/740-26-0x0000000008000000-0x000000000800A000-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

Processes:

2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

740 hasfj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
740	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe

description	pid	process	target process
PID 1652 wrote to memory of 740	1652	2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe	hasfj.exe
PID 1652 wrote to memory of 740	1652	2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe	hasfj.exe
PID 1652 wrote to memory of 740	1652	2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_7751e6ea23103e588776ab9035d9b6a5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:740

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
32KB

MD5
0b68d780788fd2c57a1515f62cbcfdeb

SHA1
0268aa75dfd21b53281856cc4aae294e64a8fef0

SHA256
e493052c2b41a71e04e1a022a3e3e26f74375699eb4a34ba1c86dc88663c0d34

SHA512
6ea6a50c4016197f2ea1706799f6bc655487903b9a19e8c9d6d3b70ef255d64da66fc3c2d75227d822f91a733b027c81f751383c618943ee4e3eb435a49ec38e

Download Submit
memory/740-19-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/740-25-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/740-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1652-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1652-1-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/1652-2-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/1652-9-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/1652-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download