7932b1f55477751237688481e1b73656eaf12888e58fab9c109ce872b5ba9482

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 15:42

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General

Target

2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe
Size

97KB
MD5

713a5260b3a2c773c0f2ed212f211cae
SHA1

e7217636b43f6ef03b7ac870bd63dc37f3427745
SHA256

7932b1f55477751237688481e1b73656eaf12888e58fab9c109ce872b5ba9482
SHA512

444ed0c366f603110c2fdcdd9f12951deb7848feee75383778f72849d5ddb386e6f3669352bdc00dc62a4ea520f9f7440a2dc37961db800751b960ec2179ceed
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01F:AnBdOOtEvwDpj6zn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2364-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/3000-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2364-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3000-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2364-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/3000-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2364-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3000-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2364-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/3000-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2364-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/3000-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3000 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

pid process

2364 2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

pid	process
3000	asih.exe

pid	process
2364	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2364-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/3000-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2364-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/3000-26-0x0000000000500000-0x000000000050F000-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 4 IoCs

Processes:

2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe

description	pid	process	target process
PID 2364 wrote to memory of 3000	2364	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe
PID 2364 wrote to memory of 3000	2364	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe
PID 2364 wrote to memory of 3000	2364	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe
PID 2364 wrote to memory of 3000	2364	2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_713a5260b3a2c773c0f2ed212f211cae_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2364

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
97KB

MD5
48374b493ccf7f73893745c71ca2198c

SHA1
3dc8784b17c1ca25698376b637bb93dc071786a1

SHA256
82bbe8fb319b97c0deab5b4d4a18e335be0d7487c7c2d61036db388d18c9546d

SHA512
e8518da32ab427392709f67a827309a57303889545382215b89e1fbba4ac2e43b3d5a6fb5aa3017727d6c2e5e82c0487e2268c690a034578a98ba9878a0ed4d3

Download Submit
memory/2364-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2364-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2364-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2364-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2364-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3000-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3000-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/3000-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download