b6b1749d4af4fe4b3ca2b82ed9274394e2bde4850937fceba31dafe3d7578b28

Analysis

max time kernel
148s
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
03/06/2024, 00:01

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General

Target

2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe
Size

91KB
MD5

47a913a5845ebe1dcf4acc376458f6c1
SHA1

b523cf283f075a1121aec569a3847b6f95ed2773
SHA256

b6b1749d4af4fe4b3ca2b82ed9274394e2bde4850937fceba31dafe3d7578b28
SHA512

243368fff31b7aaa01381dd4d9f8f055741360bd6aed5e4728dc6a3820acf84c7f2505551f6121473e9603d9cad67398f6776ffc909fd687ad8ad0a70f06e17a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgddBD:AnBdOOtEvwDpj6zR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5056-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002327d-13.dat	CryptoLocker_rule2
behavioral2/memory/5056-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3392-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5056-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002327d-13.dat	CryptoLocker_set1
behavioral2/memory/5056-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3392-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5056-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000002327d-13.dat	UPX
behavioral2/memory/5056-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3392-26-0x0000000000500000-0x000000000050F000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3392	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5056-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000002327d-13.dat	upx
behavioral2/memory/5056-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3392-26-0x0000000000500000-0x000000000050F000-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 5056 wrote to memory of 3392	5056	2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe	82
PID 5056 wrote to memory of 3392	5056	2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe	82
PID 5056 wrote to memory of 3392	5056	2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_47a913a5845ebe1dcf4acc376458f6c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5056
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3392

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
91KB

MD5
897620b5b1fb9ca190928f0ffde4a22e

SHA1
f971dd13c1493d0d9c85ff126d71e67a1ea7981b

SHA256
2be25af956dd6aab9c185f1d76dcbe9a5aa11e096b0a81a455e13972d21eece8

SHA512
f4ebeea97d911e142fd484fbc6cf9c5b7b6fdd6045eeeca2677b72a0272a5319caee19a3c470c6b2b40509a04d4a35c78b28ce2f67a720b9e1fb70f01dad6d43

Download Submit
memory/3392-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3392-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3392-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5056-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5056-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5056-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5056-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5056-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download