5bd7dd930c539bf98f4c1d2e0f9d0552b5519c890eb5edcc363fde636921eaa4

Analysis

max time kernel
149s
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
20-05-2024 22:38

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General

Target

2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe
Size

39KB
MD5

f6a07627c25346a25a4f3c7b7c5254d8
SHA1

979f1515c4f449232747857422d64dc78485a024
SHA256

5bd7dd930c539bf98f4c1d2e0f9d0552b5519c890eb5edcc363fde636921eaa4
SHA512

8e78992af7cea0a0fab77dfc3f8dd897d3f6926272819801e5107ea36c94c1e160582c79c7e7b38c02d340860cc772295d4e5ec70e4988a3740655cb2f23aeaf
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYoe:qDdFJy3QMOtEvwDpjjWMl7Tle

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3080-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2476-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2476-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3080-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2476-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2476-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3080-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2476-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2476-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2476 asih.exe

pid	process
2476	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3080-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2476-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2476-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe

description	pid	process	target process
PID 3080 wrote to memory of 2476	3080	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe
PID 3080 wrote to memory of 2476	3080	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe
PID 3080 wrote to memory of 2476	3080	2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-20_f6a07627c25346a25a4f3c7b7c5254d8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3080

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2476

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
6dd7cac5c8df24b93abe639c33366ac0

SHA1
5242af86f5f1af2e5ec793567deb29a502358acc

SHA256
6b8593cd56eb91e3388481c445101a6626409aba27e5616ea3262edfdb6c2036

SHA512
914e6c100bb8fa7419d2bb556ba8d50b22abe53f6ce4d03f41ec9dab3099e5ac10c9f4002436a79c26c3002345f38085423526269263cdf9d6aef9bac1b6b980

Download Submit
memory/2476-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2476-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2476-27-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2476-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3080-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3080-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3080-2-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/3080-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/3080-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download