740f9d30b40331d28b9db51662d1ad9963f4d1fc0ad9660f7a2617b874ea937b

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 13:22

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General

Target

2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe
Size

77KB
MD5

0b7160beb0b17ac2a3e58620750e5f28
SHA1

388fab1f5778d779842ea6cd7dfccd31b3a68a1e
SHA256

740f9d30b40331d28b9db51662d1ad9963f4d1fc0ad9660f7a2617b874ea937b
SHA512

c7e5f1fb2b87433078027c27fa91bc2be92afab381b9dbc3a796915f7954d1fa8ecb42716164a0d436924a3a6600fa3c91820fca22670230ef868ebaeb5dafd4
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUx3:T6a+rdOOtEvwDpjNtHPY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_rule2
behavioral2/memory/2800-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1284-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2800-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_set1
behavioral2/memory/2800-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1284-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2800-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97c-13.dat	UPX
behavioral2/memory/2800-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1284-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2800-27-0x0000000000500000-0x0000000000510000-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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2800	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97c-13.dat	upx
behavioral2/memory/2800-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1284-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2800-27-0x0000000000500000-0x0000000000510000-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 1284 wrote to memory of 2800	1284	2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe	85
PID 1284 wrote to memory of 2800	1284	2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe	85
PID 1284 wrote to memory of 2800	1284	2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_0b7160beb0b17ac2a3e58620750e5f28_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1284
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2800

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
77KB

MD5
a193d0b1beccda1e744d3e7841426b4a

SHA1
ac1a72c366d2869a8a53bdc5260923b6e61882d4

SHA256
c175c3bc62bd269d38b834c9e7a6864edde3ff1aed87aa8fc67394372ed5e2bc

SHA512
9bd0827947a5229080a178b6f288b585ea9c70fd37854f91202a94eb059830a00a4fec36b1035acc667f004448c95acdba8ecd3f92381737aa3e60e571871208

Download Submit
memory/1284-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1284-1-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/1284-2-0x0000000002300000-0x0000000002306000-memory.dmp

Filesize
24KB

Download
memory/1284-3-0x0000000002220000-0x0000000002226000-memory.dmp

Filesize
24KB

Download
memory/1284-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2800-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2800-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2800-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2800-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download