6833120fb3c1f8ed2b8b55965a3fa8d29f14587b27e56919bfce614198fbc5fa

General

Target

2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe
Size

61KB
MD5

f5f2ce847cdd9a84fad3296145cb882e
SHA1

d7a24de3e23b856a9186f50c72f5d6240a6e5aca
SHA256

6833120fb3c1f8ed2b8b55965a3fa8d29f14587b27e56919bfce614198fbc5fa
SHA512

ff14c8d71d2a6bc04531a0e0d381f75d6e346180a453e7c762c9f2be18a686a0ab498f1204908289da1b81fb9dae25f69820ae9611e9a30239a69d8fc2825a47
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHNMhvV:1nK6a+qdOOtEvwDpjd

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1244-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1244-12-0x0000000002880000-0x0000000002890000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2368-24-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1244-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1244-12-0x0000000002880000-0x0000000002890000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2368-24-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1244-8-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1244-12-0x0000000002880000-0x0000000002890000-memory.dmp	UPX
behavioral1/memory/2368-24-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2368 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe

pid process

1244 2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe

pid	process
2368	asih.exe

pid	process
1244	2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1244-8-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1244-12-0x0000000002880000-0x0000000002890000-memory.dmp	upx
behavioral1/memory/2368-24-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2368-26-0x0000000000500000-0x000000000050F311-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_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe

description	pid	process	target process
PID 1244 wrote to memory of 2368	1244	2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe	asih.exe
PID 1244 wrote to memory of 2368	1244	2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe	asih.exe
PID 1244 wrote to memory of 2368	1244	2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe	asih.exe
PID 1244 wrote to memory of 2368	1244	2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_f5f2ce847cdd9a84fad3296145cb882e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1244

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2368

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

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Downloads

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

Filesize
62KB

MD5
1909d6c83116ae03e8c9d456befd0191

SHA1
d096c6ff7c75a7839e85750afc4699b473a280fe

SHA256
6b5b2ad98a0c418c3f3c7361cc1b97ba631b6fc5715d892ac8dc8a747d7e1784

SHA512
448f0c94a34d2ac0cb2956892b4ad3e6e5bad0eb8748b605f01221db1c8da23e2caf18c2839cee9153bf337df15bdf84bc24f85b66d2a992b8151063bf9afa9b

Download Submit
memory/1244-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1244-8-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1244-1-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/1244-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1244-12-0x0000000002880000-0x0000000002890000-memory.dmp

Filesize
64KB

Download
memory/2368-25-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2368-24-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2368-17-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2368-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads