20368db0de3ead3d953c42ad998bc9d70e1e2d609b9450c64955c9a7cefd5caf

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 04:12

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General

Target

2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe
Size

41KB
MD5

f095049d64961aa4dc3f6baf3f5dd8db
SHA1

ca5576b66ebf50f1c80031ef3a27e05dafaba8a5
SHA256

20368db0de3ead3d953c42ad998bc9d70e1e2d609b9450c64955c9a7cefd5caf
SHA512

764db3456be48595a72da4621a4fb33d280c1e3ec16105e0fb1b56a19d79d84dc4a4b1d3c66221fcabc8f3e9721ce33a0ca1f9a1808b0f9982f3ad6e6c711c48
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKHs:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/4400-16-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3156-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4400-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/4400-16-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3156-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4400-27-0x0000000008000000-0x000000000800F000-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:

2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

4400 hasfj.exe

pid	process
4400	hasfj.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3156-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/4400-16-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3156-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4400-27-0x0000000008000000-0x000000000800F000-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:

2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe

description	pid	process	target process
PID 3156 wrote to memory of 4400	3156	2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe	hasfj.exe
PID 3156 wrote to memory of 4400	3156	2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe	hasfj.exe
PID 3156 wrote to memory of 4400	3156	2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_f095049d64961aa4dc3f6baf3f5dd8db_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3156

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:4400

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\hasfj.exe
Filesize
41KB

MD5
2f887815fbeb6430053b0b959d4554fe

SHA1
bc872425bcd24966741bc899fda3fdaf080fd7cf

SHA256
ef1a8ac2fd0491811429bacf01218b85946bf21d3219198a052b4dd86e9cfd70

SHA512
8cc79a2f33b8cf2c70aaef65b22030e99e8a1c39c378f062dbbbbbaf2002dbccead5f6ed20d7b1824760a90b8a19bbcdf4d70a26a03cce37799c675e693ebad2

Download Submit
memory/3156-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3156-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3156-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/3156-9-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/3156-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4400-16-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4400-20-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/4400-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4400-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download