b3bfe4753aa209e2a2d9ee67142b6da4ae4bbbcce50c4e4c4ac53be05a615cba

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
28-01-2024 07:36

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General

Target

2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe
Size

49KB
MD5

9f61c3cb7548aba19858108e9cff52a1
SHA1

3637818460e6228b0df67f067dcc7431e746823b
SHA256

b3bfe4753aa209e2a2d9ee67142b6da4ae4bbbcce50c4e4c4ac53be05a615cba
SHA512

cdab18cbd1f6d9853f1dda1c14345950c441b215a332bce24b465f588c711eb2728edc15a116162c1d485b6514e00579c4be60bf5d82f412ca6754f75dbad40f
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qn8pKIRy:79mqyNhQMOtEvwDpjBxe8TpXRy

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral1/memory/2264-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000d0000000122a8-11.dat	CryptoLocker_rule2
behavioral1/memory/2228-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2264-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral1/memory/2264-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000d0000000122a8-11.dat	CryptoLocker_set1
behavioral1/memory/2228-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2264-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
2228	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2264	2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe

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 2264 wrote to memory of 2228	2264	2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe	28
PID 2264 wrote to memory of 2228	2264	2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe	28
PID 2264 wrote to memory of 2228	2264	2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe	28
PID 2264 wrote to memory of 2228	2264	2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-28_9f61c3cb7548aba19858108e9cff52a1_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2228

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

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Downloads

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

Filesize
49KB

MD5
7d9d756ba4aab51e0f1f37ab8b7fbe3f

SHA1
accf63d204252d88798ffe048a813fd4f0561519

SHA256
ef4edac3edca05f575d81582f06f3ba74ac5513df912d3f9cef0cbc8509afd93

SHA512
6dce613b6f0115b48ec3a6ef0361f616d6fc2383874229c1e6e8fa48aff186bb7a4be132b9542b8a4d295637aa7107cf33540b5670d1f89173d53b7c253e8b82

Download Submit
memory/2228-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2228-18-0x0000000000390000-0x0000000000396000-memory.dmp

Filesize
24KB

Download
memory/2228-19-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2264-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2264-0-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2264-2-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/2264-9-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2264-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download