c758449b45bda0ecb28468c73b388c0840990569b81221fc406ad6c00189d163

Analysis

max time kernel
14s
max time network
123s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
12/03/2024, 19:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe
Size

42KB
MD5

4aeb7da6beef47128bdf3a9b10e7813f
SHA1

ea760bec1a7ca20b1a0d9dffb9cf10b5a12ffa92
SHA256

c758449b45bda0ecb28468c73b388c0840990569b81221fc406ad6c00189d163
SHA512

97484f382c725801578f07cd412077ef8d854dd84ddab46c09d48a427184eeb5ee7863ac2557159ef29d14f82c064146178ea0f60bfb4db63e12d0ab7228dd26
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAq2g8:b/pYayGig5HjS3NPAqj8

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000013a88-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
3048	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
1740	2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
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
1740	2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe
3048	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 3048	1740	2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe	28
PID 1740 wrote to memory of 3048	1740	2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe	28
PID 1740 wrote to memory of 3048	1740	2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe	28
PID 1740 wrote to memory of 3048	1740	2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_4aeb7da6beef47128bdf3a9b10e7813f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1740
- 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:3048

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

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
42KB

MD5
f46a47b581a567118146dd4a8c75bf6d

SHA1
ad59512603265f45788c54b7823a831af49b0fbc

SHA256
cfc41192d4fdc16f941b79f96ea87936dca48fb4e93c5bc713498d264ceb47db

SHA512
c4a3ab5700c1c786d8716cea307129e41c3e8fbbb45df3d3e50939e7abd49d8c64732fb9001f26a83e178ba3234b3c8b08e5b0722953ba13371360c6f25cf2cc

Download Submit
memory/1740-0-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1740-2-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/1740-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3048-23-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download