1e1b3a6dc8a201a3c4c76c974c91ce45a3e106e236aadc890cd4e47216d00326

Analysis

max time kernel
149s
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
06/03/2024, 05:45

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General

Target

2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe
Size

46KB
MD5

414d3d9ef97fb36290cf05571de4dfa8
SHA1

0888d4e9131fee41f437603d646aada4f822a398
SHA256

1e1b3a6dc8a201a3c4c76c974c91ce45a3e106e236aadc890cd4e47216d00326
SHA512

00137c776e250f63ec62a284c23099954c5221ebeef8f887d13df23719245bcfcb8b8dce98d38798247dd2fe81877d3d826fc2e7e252505e9a01aa6767af5772
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Mobpr:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ3

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1892-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000001e5eb-13.dat	CryptoLocker_rule2
behavioral2/memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4764-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4764-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1892-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000001e5eb-13.dat	UPX
behavioral2/memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4764-27-0x0000000000500000-0x0000000000510000-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4764	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 1892 wrote to memory of 4764	1892	2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe	88
PID 1892 wrote to memory of 4764	1892	2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe	88
PID 1892 wrote to memory of 4764	1892	2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-06_414d3d9ef97fb36290cf05571de4dfa8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1892
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4764

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
46KB

MD5
4f3e334cd132ca464b786aa85327bf4a

SHA1
b653644ec24a118d57a257b93dda038b66d559c7

SHA256
35d16c70121b34cfa13e8211cb7167ec177c46c11de9be857b508b6d14291b8e

SHA512
52ff1e73cd8deddc46c776c737b7fe28d83966e6a3e8ba9cf892229def8512733a41b7f471dc45c79a967fc378a1d7fc3fc31ecd376a0ba0b1b50bfc7a9558b2

Download Submit
memory/1892-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1892-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1892-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1892-3-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/1892-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4764-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4764-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4764-22-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/4764-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download