f658b27c6341221442d65f4f1c14f09bcdcd40c73c5e81b863773486468765f0

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 16:45

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General

Target

2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe
Size

59KB
MD5

6e16802668d1dd95e21d6a65f65be195
SHA1

2fd04914abd2bb1cadd248e93bf91034dbe3ddd9
SHA256

f658b27c6341221442d65f4f1c14f09bcdcd40c73c5e81b863773486468765f0
SHA512

89f330821776df3fb35c21a235eeeb080e1d1411a61565965b529d027ef18166e0e6c33ab4d5860a02b6f946f330aa6a91f0defd38df35f8818ae028b73a611a
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAPj8:H6QFElP6n+gou9cvMOtEvwDpjCpVXJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4848-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4264-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4848-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4264-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4848-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4264-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4848-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4264-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4848-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4264-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4848-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4264-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4264 asih.exe

pid	process
4264	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4848-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4264-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4848-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4264-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe

description	pid	process	target process
PID 4848 wrote to memory of 4264	4848	2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe	asih.exe
PID 4848 wrote to memory of 4264	4848	2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe	asih.exe
PID 4848 wrote to memory of 4264	4848	2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_6e16802668d1dd95e21d6a65f65be195_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4848

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4264

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
59KB

MD5
cf7050c7360a4b0278ccc6e83a8dc606

SHA1
e3bdc1018b3a7eb908eaa015c80172af96c15b3a

SHA256
4b8bf342eab71808995746a7a61cee98c1a3c0cb113e8ed92de85d4abfeef442

SHA512
113b407101c00448126813226f1b22772b5a83deff5c69825ce9a23cfc9ed1f686447d2547fc3950a9f495212b17a079aaf57ad12b9f7166ee4b30466489dcb5

Download Submit
memory/4264-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4264-26-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4264-21-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4264-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4848-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4848-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4848-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4848-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4848-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download