f34c13a2a6f92947c93dd3015c702862d7fc5d74d7791d0250eabdd85fc81aad

Analysis

max time kernel
149s
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
02/06/2024, 04:38

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General

Target

2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe
Size

88KB
MD5

958da012bd185b5676faec41cc41fdb9
SHA1

a879dd6a1c93418081a530b06599041d7b89f287
SHA256

f34c13a2a6f92947c93dd3015c702862d7fc5d74d7791d0250eabdd85fc81aad
SHA512

bb9fe6fe574a8209f231510f0b1a67efe271f8912b68a5302dc1f5b84b7161a4dd134311f98330fcebd512c404793e493c1a768b17ead2d83110da4d3f2324dc
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODZ:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1068-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/1068-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4764-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1068-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023298-13.dat	CryptoLocker_set1
behavioral2/memory/1068-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4764-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1068-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0006000000023298-13.dat	UPX
behavioral2/memory/1068-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4764-27-0x0000000000500000-0x000000000050F000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4764	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1068-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0006000000023298-13.dat	upx
behavioral2/memory/1068-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4764-27-0x0000000000500000-0x000000000050F000-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 1068 wrote to memory of 4764	1068	2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe	81
PID 1068 wrote to memory of 4764	1068	2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe	81
PID 1068 wrote to memory of 4764	1068	2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_958da012bd185b5676faec41cc41fdb9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1068
- 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
89KB

MD5
8ec079d9d3a8e1ed067ee9de407013b5

SHA1
dcc871dd4cb3ce9bcd3ac698d59de4e6dd0cf4d2

SHA256
91267f60f3961e670bfee6a2f5707eba404e45f8863245e96ab6f5f3b06baee8

SHA512
4ef2ec2739fa2dbc5324d84c2c7ecfe4829023d95ae3290613ec04811c5b62bd2bf08d5861aa659c75efc5acb67c38f9cda60c0b431199953e08735745852a9e

Download Submit
memory/1068-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1068-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1068-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1068-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1068-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4764-20-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/4764-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4764-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download