28d15af47253c8e74cdc4ee24dc6bae93c510a08d33ecc7e8577b4e456bd1189

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
01/02/2024, 15:28

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General

Target

2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe
Size

48KB
MD5

5e5fca34a2985db7e47f240b4587d25a
SHA1

b1e61412f4f0c007ed53b70944a4d190a509c1b0
SHA256

28d15af47253c8e74cdc4ee24dc6bae93c510a08d33ecc7e8577b4e456bd1189
SHA512

0dfa017c4563597c7dbc0b318e4e28651ee2d6bfee59b28c7298e4bb0b9e929b9c8cc5023a063f0e3c04045e157a2053e7d8cf1cab8fe5e3dcdcc94238f5f58a
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTB52Y:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6uY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4172-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231f2-13.dat	CryptoLocker_rule2
behavioral2/memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4172-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231f2-13.dat	UPX
behavioral2/memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4864-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4864	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 4172 wrote to memory of 4864	4172	2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe	85
PID 4172 wrote to memory of 4864	4172	2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe	85
PID 4172 wrote to memory of 4864	4172	2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-01_5e5fca34a2985db7e47f240b4587d25a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4864

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
48KB

MD5
0ba1fb1d297df4eaf8c1d149417ea4ac

SHA1
cba4713dc2e2637e9ae9861daca964cf6df60503

SHA256
43742b6dba8fc49c86ef70861c9bedff5aac08ab12c9df95b615462e5e0c6120

SHA512
407a725fb75273d0f776fb34b4e1ccf5a53916614d8068c52774e814024c197ed87075c9516bbb74b1576b557d95edd61ab6a5213037f8f4258cfeafca7afc0d

Download Submit
memory/4172-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4172-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4172-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4172-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4172-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4864-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4864-20-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/4864-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download