6934a9ee12b9a291a5ddd539e033e7e71872fc2e67b93317ed964116464ae972

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
29-05-2024 01:24

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General

Target

2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe
Size

41KB
MD5

a2e9b8c9c08c42204b16ecac24acb7f3
SHA1

6261ed66ca57319374fdf926e05dbf726b43135d
SHA256

6934a9ee12b9a291a5ddd539e033e7e71872fc2e67b93317ed964116464ae972
SHA512

2f623b874a9c49b26bf3e64552e84269c2e24867334cfe14997bb66453c147024cd8a6bd2509073bcc98105e7aa8fd0b2370fd91ca176af5b0e40eae01647cfc
SSDEEP

768:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKsmoX:ba6YcA/Xk3wXFXSqAJqX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2040-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023442-13.dat	CryptoLocker_rule2
behavioral2/memory/2040-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4080-26-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2040-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0008000000023442-13.dat	UPX
behavioral2/memory/2040-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4080-26-0x0000000008000000-0x000000000800F000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4080	hasfj.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2040-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0008000000023442-13.dat	upx
behavioral2/memory/2040-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4080-26-0x0000000008000000-0x000000000800F000-memory.dmp	upx

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 2040 wrote to memory of 4080	2040	2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe	85
PID 2040 wrote to memory of 4080	2040	2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe	85
PID 2040 wrote to memory of 4080	2040	2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_a2e9b8c9c08c42204b16ecac24acb7f3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4080

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
41KB

MD5
ee09a313db17a60979db62736bb00573

SHA1
67f6a03648322238b6b49f6f6ff4f9469f2cfd46

SHA256
565f4281f31a4967c24cae81b4c5f1641b17ef2e30d1e133aa3f83da9ad172e2

SHA512
344cf17a7d6dfa475362da6fdbfeaccd264cf3bd65100ff89614a1f5d6163d5ccc8a1d976c918d38998a4e787185918e3567d1e17118682ac65141fb59f32d48

Download Submit
memory/2040-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/2040-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/2040-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/2040-9-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/2040-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4080-25-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4080-19-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4080-26-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download