61353dc03901181f46ccaad082c480d0537410d55d8c8cfce6f3fb1d168f2c3e

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/04/2024, 08:47

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe
Size

84KB
MD5

8b43dd80c07a44a43e1b5405542cffc6
SHA1

5274da1e81e25d0b4db6940debd6193ff694145f
SHA256

61353dc03901181f46ccaad082c480d0537410d55d8c8cfce6f3fb1d168f2c3e
SHA512

f05a5b6abd7221413fcdf615090d529486bc6448c6496fce0d94f7a0fa5274ee349977df3faec6a4266280285e67a4889028209a96b06a0a6ccdc06e52b7622b
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOT7vM5R0:T6a+rdOOtEvwDpjNZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000800000001227d-11.dat	CryptoLocker_rule2
behavioral1/memory/1976-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1248-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1248-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000800000001227d-11.dat	CryptoLocker_set1
behavioral1/memory/1976-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1248-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1248-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000800000001227d-11.dat	UPX
behavioral1/memory/1976-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1248-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1248-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
1248	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1976	2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000800000001227d-11.dat	upx
behavioral1/memory/1976-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1248-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1248-26-0x0000000000500000-0x0000000000510000-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 1976 wrote to memory of 1248	1976	2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe	28
PID 1976 wrote to memory of 1248	1976	2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe	28
PID 1976 wrote to memory of 1248	1976	2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe	28
PID 1976 wrote to memory of 1248	1976	2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-11_8b43dd80c07a44a43e1b5405542cffc6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
84KB

MD5
939ce39538a504ff280dc45d9a4b8394

SHA1
4c4eaa949beeac0e75a8c554200b2be38f8c8316

SHA256
c5066c12341c1fd03c7bf8178e02d61af66ab044fe7f836eb016449679c6585a

SHA512
4d5f04b498d2598d7cc0730ac236d1ba9d7973d3f94b4709ccfb030f30f6dff28f775b112784b1343283caac45381f309c366c601d277b0b6291d62f2ab90128

Download Submit
memory/1248-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1248-18-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/1248-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1248-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1976-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1976-1-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/1976-4-0x0000000000430000-0x0000000000436000-memory.dmp

Filesize
24KB

Download
memory/1976-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/1976-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download