73c33b3fd2aabc6066343750b520c791031afc832869269a926a936ac36ad414

General

Target

2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe
Size

104KB
MD5

64fdc64c044746f778439ba1b1b97902
SHA1

d6070f79ac131f2484e733e96a371c7ec32871b4
SHA256

73c33b3fd2aabc6066343750b520c791031afc832869269a926a936ac36ad414
SHA512

9797a23b97ce2247903134c7a8c0954e89c7fdc23b7a9f4240a99ac9fc4cc522df460af762c87f320c0e63f0de7462fee7ec31f7393d66f83e68098b7a7ae5f3
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gkslc:1nK6a+qdOOtEvwDpjy

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1928-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2460-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-1-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1928-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2460-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1928-1-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1928-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2460-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2460 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe

pid process

1928 2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe

pid	process
2460	asih.exe

pid	process
1928	2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1928-1-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1928-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2460-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2460-26-0x0000000000500000-0x000000000050F311-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:

2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe

description	pid	process	target process
PID 1928 wrote to memory of 2460	1928	2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe	asih.exe
PID 1928 wrote to memory of 2460	1928	2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe	asih.exe
PID 1928 wrote to memory of 2460	1928	2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe	asih.exe
PID 1928 wrote to memory of 2460	1928	2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_64fdc64c044746f778439ba1b1b97902_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2460

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
105KB

MD5
9d94e687d257f29eff1b055fdc34ad42

SHA1
5b54dd416354c199b83d9e140ba2dd426d88063a

SHA256
17d204fbb2542bb291dcbde42736091ead9aee752ccb83a4ca97443d13422152

SHA512
3bc809692a152aa490f86977cf1fb6813337a9426ff604ce045e17b209a784993bf6b26409916403e4524f25f2205e21cc2d5e1ddfd9a4573f7c3a2fa7fc89ce

Download Submit
memory/1928-1-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1928-0-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1928-2-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1928-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1928-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2460-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2460-18-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2460-23-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads