964fc076da04186e2ab0cf014f6a58d61071dd15b295d694a29316f9f9f093c1

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
30-05-2024 20:24

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General

Target

2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe
Size

40KB
MD5

91cf1b92349f64a8169570ea20db670e
SHA1

376a39892823b1fff8333089729dbf79f25a868c
SHA256

964fc076da04186e2ab0cf014f6a58d61071dd15b295d694a29316f9f9f093c1
SHA512

23f9ac6ea8f744ab274cd2386757336cbfe184050e125bcfe88b9f4d1125ece29bf83322b61a204000cc04a18a8205a5c721e874d795bca29d6ce61275c6ed44
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYldw:qDdFJy3QMOtEvwDpjjWMl7T6dw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_rule2
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000900000002328e-13.dat	CryptoLocker_set1
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000900000002328e-13.dat	UPX
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1612	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000900000002328e-13.dat	upx
behavioral2/memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1612-27-0x0000000000500000-0x0000000000510000-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 1800 wrote to memory of 1612	1800	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	83
PID 1800 wrote to memory of 1612	1800	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	83
PID 1800 wrote to memory of 1612	1800	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1612

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
40KB

MD5
4efbd955f1e8553dae887538e529da5c

SHA1
b543d7fcc2d95a5e8c37269ee7b2c7dbc9d4d355

SHA256
1d8cb7900918328a7f1a6dd39c9a1d2f3af96e8053aceac70b559d10d9b6324d

SHA512
cbbbd81b7dc5029af2e8ce80cdd4230e590cd43b17de1d93591832ffe64686f48d9749bcf628a512c3e719002be4a96c4cb6dfbc88d9a1a7771c6785d57099ad

Download Submit
memory/1612-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1612-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/1612-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1612-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1800-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1800-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1800-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1800-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1800-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download