6c7a0b370c4356488b97dc5e242b4153b9820d5bf20dd11d9dbb0f7f38da201b

General

Target

2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe
Size

74KB
MD5

8ccc302902f66f163af206baae709628
SHA1

4ca4de9c0d893f4734fc4d7959ee12713a0c3fb1
SHA256

6c7a0b370c4356488b97dc5e242b4153b9820d5bf20dd11d9dbb0f7f38da201b
SHA512

bf6a417b04bd8ea75e95cb95f14df22feb329354f2d66a2c8a7637699fa1f0317fef59ddab9717c13f73afa4d45612fff61d6a412a8b821c6ec63ac58187cf18
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalVr5:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2496-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000c00000001225d-11.dat	CryptoLocker_rule2
behavioral1/memory/2496-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2496-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2496-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000c00000001225d-11.dat	CryptoLocker_set1
behavioral1/memory/2496-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2496-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2496-1-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/files/0x000c00000001225d-11.dat	UPX
behavioral1/memory/2496-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	UPX
behavioral1/memory/2976-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2496-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2976	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2496	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2496-1-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/files/0x000c00000001225d-11.dat	upx
behavioral1/memory/2496-13-0x0000000001F20000-0x0000000001F30000-memory.dmp	upx
behavioral1/memory/2976-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2496-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2976-27-0x0000000000500000-0x000000000050F311-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 4 IoCs

description	pid	Process	procid_target
PID 2496 wrote to memory of 2976	2496	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	28
PID 2496 wrote to memory of 2976	2496	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	28
PID 2496 wrote to memory of 2976	2496	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	28
PID 2496 wrote to memory of 2976	2496	2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_8ccc302902f66f163af206baae709628_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2976

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
74KB

MD5
164ab32656c998dfdccd08bb8cdc98ba

SHA1
d50a496b5d213ba57e78fbd29834f5d79494f6fe

SHA256
51b546728c67f8a4cc910dc9711b813d6f82d6d25052b862d18807ac4284a4d8

SHA512
4c6716272455e445bde55183f215638d6961b2a8905b7dfd0d5f84b5dcb9d5832181423063997e72e0e7294dd6839d712a8602ecbf4235ce5f150c101333db78

Download Submit
memory/2496-0-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2496-1-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2496-2-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2496-9-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2496-13-0x0000000001F20000-0x0000000001F30000-memory.dmp

Filesize
64KB

Download
memory/2496-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2976-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2976-26-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2976-19-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2976-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

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