820b5051307905cd5f45c4e04c189b0ad7416087ddc7719986eff66c1e723f47

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 20:40

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe
Size

64KB
MD5

4c5979661e45723ff817bda7aaf169fb
SHA1

cac491fa335490d6919c3bd0d4e9e19a37b13cb7
SHA256

820b5051307905cd5f45c4e04c189b0ad7416087ddc7719986eff66c1e723f47
SHA512

c1dac45ce5068053dbe22989eff5fa00c4e940bf238b8996a66a48b2bf36ddeb0ac70ba3bfeeeb5bcfd626819f4d54d44e41bc86069ba4113208fe7a06e12ca2
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiR:BbdDmjr+OtEvwDpjM8w

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2248-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2248-13-0x0000000000650000-0x0000000000660000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2248-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2248-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2248-13-0x0000000000650000-0x0000000000660000-memory.dmp	UPX
behavioral1/memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2772 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe

pid process

2248 2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2772	asih.exe

pid	process
2248	2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe

description	pid	process	target process
PID 2248 wrote to memory of 2772	2248	2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe	asih.exe
PID 2248 wrote to memory of 2772	2248	2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe	asih.exe
PID 2248 wrote to memory of 2772	2248	2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe	asih.exe
PID 2248 wrote to memory of 2772	2248	2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_4c5979661e45723ff817bda7aaf169fb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2772

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
64KB

MD5
eaff7b294976563ae2a02bddf01bd509

SHA1
6e7d9153ae4949351dfe6e677bab83070299b65a

SHA256
549295a09f6459c528978b1f3b0631290ca63176060cf71f19b898407ebb420f

SHA512
dbd56f0e0f725e695115ae4c76b63ab3d39d224960bdf209318ebe61baef878737518d8c30a2005ca3a7a9bbc16f1436e1aaf8e2d4c09aa6e0ef4779a1423388

Download Submit
memory/2248-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2248-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2248-3-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2248-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2248-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2248-13-0x0000000000650000-0x0000000000660000-memory.dmp

Filesize
64KB

Download
memory/2772-19-0x0000000000380000-0x0000000000386000-memory.dmp

Filesize
24KB

Download
memory/2772-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download