486399222a9aab5fa9c54c70018c438400eabf959d34dfe7cb73c91fe084b836

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2024, 09:43

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General

Target

2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe
Size

45KB
MD5

fad4faeeb5367238c2e60b8a7ea3b923
SHA1

1a312dccaa42f71b996edc0c0f8c23a97ee2c3ca
SHA256

486399222a9aab5fa9c54c70018c438400eabf959d34dfe7cb73c91fe084b836
SHA512

67f2c0ec8213f4f3f1ad20d9c6c4748b4c589866d79101bcb241db06e549103c5dbc92e20c623bdb90429230a691729e13ed26286b51bff33a110eff1b5672d8
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoPW:qmbhXDmjr5MOtEvwDpj5cDtKkQZQhW

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023220-13.dat	CryptoLocker_rule2
behavioral2/memory/4996-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3920-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4996-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4996-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3920-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4996-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023220-13.dat	UPX
behavioral2/memory/4996-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3920-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4996-27-0x0000000000500000-0x0000000000510000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4996	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 3920 wrote to memory of 4996	3920	2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe	85
PID 3920 wrote to memory of 4996	3920	2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe	85
PID 3920 wrote to memory of 4996	3920	2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-01_fad4faeeb5367238c2e60b8a7ea3b923_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4996

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\asih.exe

Filesize
45KB

MD5
3d746cfb4b50b937456eb45504b2df14

SHA1
c4bb09d193b326618de479e4f48160422815a310

SHA256
8cc7fa91d8e824d45bf46ef3c154e417b4be3ac5ac11c44dc274df517c079f7d

SHA512
38e075372e862b5e1d99ffed104cc62720b001ba5b1b3943ac585670088d6d75af6c45dbac83fd245292ed58db1cdd30dcc9c4c1c03d64a5c025f142d3d30e40

Download Submit
memory/3920-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3920-1-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/3920-2-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/3920-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3920-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4996-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4996-22-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/4996-20-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/4996-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download