cc2d145903dde6d9532b010c1de6039610b961bbdd970d2a98878590801ded87

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
23-05-2024 02:27

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General

Target

2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe
Size

66KB
MD5

34428f5106b42584f42c2e328c98f4ae
SHA1

37accf3a58603c374bdc937bfe06c72f7c7ba99a
SHA256

cc2d145903dde6d9532b010c1de6039610b961bbdd970d2a98878590801ded87
SHA512

d3522fa824f949e8deffd68d090335cdb17f280e1b2116b53d5d2d715ae5655382f36bd7f31d82fba8ac20640356639e01366a88bf7370ee197df9fef73ed439
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRL:1nK6a+qdOOtEvwDpjq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1892-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1892-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3388-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3388-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1892-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1892-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3388-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3388-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1892-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1892-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3388-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3388-27-0x0000000000500000-0x000000000050F311-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:

2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3388 asih.exe

pid	process
3388	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1892-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1892-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3388-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3388-27-0x0000000000500000-0x000000000050F311-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:

2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe

description	pid	process	target process
PID 1892 wrote to memory of 3388	1892	2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe	asih.exe
PID 1892 wrote to memory of 3388	1892	2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe	asih.exe
PID 1892 wrote to memory of 3388	1892	2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_34428f5106b42584f42c2e328c98f4ae_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1892

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3388

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
67KB

MD5
601187c755526daf69029b1383399364

SHA1
d40dadfbb092a667f7cd343563ff2a11dca638b8

SHA256
ee3a638ce1804d1315e46088916705cc1a8fb962f6022985124e56abf278fb17

SHA512
1dde9d413d1a337302043e3c716df52bb9df32c48c19f8a4e33e07885b8d7d50585640ac6cccc55de9d5f0819a8e5668cf21baf4019bca3c08f2c816b5e4c042

Download Submit
memory/1892-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1892-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1892-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1892-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1892-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3388-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3388-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3388-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3388-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download