d5c8504b4703d11121f5b4bb384b6744003ef1e977c54c78248261a3ef064118

Analysis

max time kernel
122s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
14/02/2024, 12:14

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe
Size

41KB
MD5

acead2b433f1a84389c04925ece11cfc
SHA1

bcbb03c4f99cbea4ca8c6292b6dd13614acc175d
SHA256

d5c8504b4703d11121f5b4bb384b6744003ef1e977c54c78248261a3ef064118
SHA512

fbf65a93af2cc0901380a3349052524fe1bacffdb3b8045425e1dec22f1e98519a83d3e7c19d7bb98ac6a54b9c295df75b6b94d32c53c4e6c50910657a6fd118
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAC:b/pYayGig5HjS3NPAC

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000a000000012262-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2496	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1700	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1700	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe
2496	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2496	1700	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	28
PID 1700 wrote to memory of 2496	1700	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	28
PID 1700 wrote to memory of 2496	1700	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	28
PID 1700 wrote to memory of 2496	1700	2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_acead2b433f1a84389c04925ece11cfc_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2496

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\retln.exe

Filesize
41KB

MD5
ed6a532ec0fef1e9d41d38df6da32df0

SHA1
4f8c770b3b8be88e9d4c963d4127652a9e6ff171

SHA256
86f0b0535813c6ab1f969d6b1018642c424a3773b8ad1dd78e4429de9481a942

SHA512
22a4cf6ab964c4ee4c479d979fe20515afa4fc6f965c1b2a0e1e939b4a3b4f1f75524b0afd59168ac7027fb6fee23b3b303fc2de9049ca1b1e90d9b837e49062

Download Submit
memory/1700-0-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/1700-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1700-2-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2496-17-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download