964fc076da04186e2ab0cf014f6a58d61071dd15b295d694a29316f9f9f093c1

General

Target

2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe
Size

40KB
MD5

91cf1b92349f64a8169570ea20db670e
SHA1

376a39892823b1fff8333089729dbf79f25a868c
SHA256

964fc076da04186e2ab0cf014f6a58d61071dd15b295d694a29316f9f9f093c1
SHA512

23f9ac6ea8f744ab274cd2386757336cbfe184050e125bcfe88b9f4d1125ece29bf83322b61a204000cc04a18a8205a5c721e874d795bca29d6ce61275c6ed44
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYldw:qDdFJy3QMOtEvwDpjjWMl7T6dw

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000014f57-11.dat	CryptoLocker_rule2
behavioral1/memory/2908-13-0x00000000006B0000-0x00000000006C0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3060-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3060-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000014f57-11.dat	CryptoLocker_set1
behavioral1/memory/2908-13-0x00000000006B0000-0x00000000006C0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3060-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3060-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000a000000014f57-11.dat	UPX
behavioral1/memory/2908-13-0x00000000006B0000-0x00000000006C0000-memory.dmp	UPX
behavioral1/memory/3060-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3060-28-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
3060	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2908	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000a000000014f57-11.dat	upx
behavioral1/memory/2908-13-0x00000000006B0000-0x00000000006C0000-memory.dmp	upx
behavioral1/memory/3060-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/3060-28-0x0000000000500000-0x0000000000510000-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 2908 wrote to memory of 3060	2908	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	28
PID 2908 wrote to memory of 3060	2908	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	28
PID 2908 wrote to memory of 3060	2908	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	28
PID 2908 wrote to memory of 3060	2908	2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_91cf1b92349f64a8169570ea20db670e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3060

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

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

Filesize
40KB

MD5
4efbd955f1e8553dae887538e529da5c

SHA1
b543d7fcc2d95a5e8c37269ee7b2c7dbc9d4d355

SHA256
1d8cb7900918328a7f1a6dd39c9a1d2f3af96e8053aceac70b559d10d9b6324d

SHA512
cbbbd81b7dc5029af2e8ce80cdd4230e590cd43b17de1d93591832ffe64686f48d9749bcf628a512c3e719002be4a96c4cb6dfbc88d9a1a7771c6785d57099ad

Download Submit
memory/2908-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2908-1-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2908-2-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2908-3-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2908-13-0x00000000006B0000-0x00000000006C0000-memory.dmp

Filesize
64KB

Download
memory/2908-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3060-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3060-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3060-27-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/3060-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing