b653cf83b3fde16c9bc5f8817afe2eda6e5105502e7e505b466bc205de09bc40

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 04:27

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General

Target

2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe
Size

41KB
MD5

43bc089deb3de1b6a1812db4ea3dd60f
SHA1

f6d041e15282a310e61963ce748a54ee69a467a0
SHA256

b653cf83b3fde16c9bc5f8817afe2eda6e5105502e7e505b466bc205de09bc40
SHA512

0040704483ea1508674ccda8a5cdab0804db4d3d5e5b93860856bf12e4f0df6130689df6ee6b9f732db0d833e4ed44d1f1d3cb05490b7249261397dcaf27ded5
SSDEEP

384:ba74uGLLQRcsdeQ72ngEr4K7YmE8j6CQYnrz1ZhdaXFXSCVQTLfjDpXqxKH9:ba74zYcgT/EkdCQgpwXFXSqQXfj0xKd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1532-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/3240-18-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1532-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3240-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1532-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral2/memory/3240-18-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/1532-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/3240-27-0x0000000008000000-0x000000000800F000-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_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

3240 hasfj.exe

pid	process
3240	hasfj.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1532-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral2/memory/3240-18-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/1532-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/3240-27-0x0000000008000000-0x000000000800F000-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_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe

description	pid	process	target process
PID 1532 wrote to memory of 3240	1532	2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe	hasfj.exe
PID 1532 wrote to memory of 3240	1532	2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe	hasfj.exe
PID 1532 wrote to memory of 3240	1532	2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_43bc089deb3de1b6a1812db4ea3dd60f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1532

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:3240

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
f907c220c52cf58261ceb8e214fa6fe8

SHA1
8a5d86eade53de0d4c30dd60529d6b338541702b

SHA256
fa30f95decb04e19216ab79f015c17bc30b19094a21aa3abeaf8bb6c89efc522

SHA512
c65e0104c689ccdf9fe1f6d2e70a520300fbd71cdd33a538f2a09d9ecf2a0f67e7c992e4ba996c973195aea1f0c80adbfee36b5eafb0f6702f3a0fb31753d535

Download Submit
memory/1532-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1532-1-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1532-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/1532-9-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1532-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3240-18-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/3240-26-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3240-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download