aca1a0c73b75bba9b5d1d0de1a026f27b71d7458ecbb2752303cba49b271e348

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/03/2024, 23:29

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
Size

59KB
MD5

57973aca44473d723dd9b977242214d8
SHA1

0091bdb5732b03a27eb8174c5d2200be206d9dd7
SHA256

aca1a0c73b75bba9b5d1d0de1a026f27b71d7458ecbb2752303cba49b271e348
SHA512

7850d7722ab9c1a3cb66d0a35ae94d7b09a3a23ae0bbc308aef1789b8d36628da40461474cfdc1d45f16fb62823ca7815e2a55c5f0baa1b04d27c8aa5fada6ea
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb614v:BbdDmjr+OtEvwDpjMs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2800-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e980-13.dat	CryptoLocker_rule2
behavioral2/memory/1132-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1132-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1132-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2800-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e980-13.dat	UPX
behavioral2/memory/1132-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1132-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1132	asih.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 2800 wrote to memory of 1132	2800	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	87
PID 2800 wrote to memory of 1132	2800	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	87
PID 2800 wrote to memory of 1132	2800	2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_57973aca44473d723dd9b977242214d8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1132

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
59KB

MD5
3f0372f4e0152bef3455d8c3a87a033e

SHA1
b9b9a1cf9db4883808fee561d8bf7429e1cb3446

SHA256
a400e03046e77a5c70552b39d298c84612af72f9484631862c4ea0be1751d568

SHA512
fda24246f3843f273b1b462f6e6af9f40feb1f78af0fb1169a1e356801a44fa11f146afc161a702015da442752dcac70c748d437afda0bd4d06c117191b3eac0

Download Submit
memory/1132-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1132-21-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1132-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1132-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2800-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2800-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2800-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2800-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2800-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download