ac59dbdded8b11a7511dc44252160dd9e6cb5779098404cdbc25748a9fb2c7f9

General

Target

2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe
Size

88KB
MD5

749c8c00f4217a2eb80c22131c511a43
SHA1

5ea3361f9c6835b50a9c71746e7af35e6c63ea48
SHA256

ac59dbdded8b11a7511dc44252160dd9e6cb5779098404cdbc25748a9fb2c7f9
SHA512

948db032d31e6cb23877bb931481cee15aeb8be68c2d4133ec133aee15c6ba79684ad29eb54666c632926b6fd6bb12dc86f4b742cd1350c6739ea9f84986c4f6
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgdPq:AnBdOOtEvwDpj6zQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_rule2
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2536-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2536-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2196-29-0x0000000002420000-0x000000000242F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_set1
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2536-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2536-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2196-29-0x0000000002420000-0x000000000242F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000b000000012256-11.dat	UPX
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2536-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2536-27-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2536	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2196	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000b000000012256-11.dat	upx
behavioral1/memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2536-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2536-27-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 2196 wrote to memory of 2536	2196	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	28
PID 2196 wrote to memory of 2536	2196	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	28
PID 2196 wrote to memory of 2536	2196	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	28
PID 2196 wrote to memory of 2536	2196	2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_749c8c00f4217a2eb80c22131c511a43_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
89KB

MD5
66f10ac9dace5b27cf155f407a4d7a4d

SHA1
dfd2267ec7292c1bd65dc968a90303adbb2798ee

SHA256
f6b1b36871d15e0163e7d13cf25a2f189d5eea991c473d76df7867403cd9cc29

SHA512
22de73521c5a30e663bf3847e3b87b7d44189fd4b9ce1daf2d6b23722fe6ec4f8ff09de4ddb2c31e9438154d6aaaeb449acf1a7d03f293e99c81fe9ca04d2916

Download Submit
memory/2196-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2196-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2196-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/2196-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2196-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2196-16-0x0000000002420000-0x000000000242F000-memory.dmp

Filesize
60KB

Download
memory/2196-29-0x0000000002420000-0x000000000242F000-memory.dmp

Filesize
60KB

Download
memory/2536-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2536-19-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/2536-21-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/2536-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download

Analysis

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