77ace20567647b3a313499ca3594bd9e2f5f4dd1c0054dfa2651312f4c811f00

General

Target

2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe
Size

66KB
MD5

51aaac98b1aa6f36346325c14101f4b9
SHA1

993d9eab513278c4bd6bb12b72a160461f249e3d
SHA256

77ace20567647b3a313499ca3594bd9e2f5f4dd1c0054dfa2651312f4c811f00
SHA512

04ad8f3efe32f9c56156669de23fd074cf80c8f6e242dc84256d2ad152de46fb227abb50152c9a8a663c0404158b41fa47816659420d3e343adc2581193a9a89
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYZ8xn:1nK6a+qdOOtEvwDpjp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2104-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2104-13-0x0000000002420000-0x0000000002430000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1912-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2104-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2104-13-0x0000000002420000-0x0000000002430000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/1912-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2104-8-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2104-13-0x0000000002420000-0x0000000002430000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/1912-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1912 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe

pid process

2104 2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe

pid	process
1912	asih.exe

pid	process
2104	2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2104-8-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2104-13-0x0000000002420000-0x0000000002430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/1912-26-0x0000000000500000-0x000000000050F311-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

Processes:

2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe

description	pid	process	target process
PID 2104 wrote to memory of 1912	2104	2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe	asih.exe
PID 2104 wrote to memory of 1912	2104	2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe	asih.exe
PID 2104 wrote to memory of 1912	2104	2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe	asih.exe
PID 2104 wrote to memory of 1912	2104	2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_51aaac98b1aa6f36346325c14101f4b9_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1912

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

Loading Replay Monitor...

Downloads

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

Filesize
66KB

MD5
fdfdf01dfef04f4704f8b1754e9adcf2

SHA1
4ea8710bb730817748bc7916472d79ac70b2fbb8

SHA256
b3bfc7c8562e1e239147ee1f09f5d34123b427c9cf8a1a8af8a193270b8dd1ae

SHA512
919c2d7a736cf92503f31ea0f55ac01270c0bbab9a83b59405dedb5ed0e12bdb6dc3f73a7193851007f255d607ad517d9c51cf4788e054b58b063233fb361880

Download Submit
memory/1912-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1912-18-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/1912-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/1912-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2104-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2104-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2104-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2104-8-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2104-13-0x0000000002420000-0x0000000002430000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads