72797515fad9bb5204634544938dbd7a88dcd7ab021f1181a944f2810f7a7f58

Analysis

max time kernel
18s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
19/03/2024, 14:43

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe
Size

41KB
MD5

973854a734d19c51bdb040de8895e212
SHA1

3aeccc66fcd69f7e0eeea9b19b8684e46871ff0c
SHA256

72797515fad9bb5204634544938dbd7a88dcd7ab021f1181a944f2810f7a7f58
SHA512

d6a707b39c8e774fa7f79d922927c795c42c2225b724741578eea935916477662db8633b336834640ead5d4e0009e3d0877772b0f268aaec95e042831611078a
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9Dm:b/pYayGig5HjS3NPA9Dm

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b00000001224f-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2148	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2932	2024-03-19_973854a734d19c51bdb040de8895e212_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
2932	2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe
2148	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2148	2932	2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe	28
PID 2932 wrote to memory of 2148	2932	2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe	28
PID 2932 wrote to memory of 2148	2932	2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe	28
PID 2932 wrote to memory of 2148	2932	2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-19_973854a734d19c51bdb040de8895e212_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2932
- 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:2148

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
6591abfbcd5f02e553e5793034c6b014

SHA1
aa26e250c45e42499f66938421bc4b7f3907238a

SHA256
99c12c8d080e8812f19ce62444e21ea3200d393cb5bb0664393c5fc8b9cf9e7c

SHA512
44e2d56e87ca964e0cd574d77cbab0689e46d0d71cc27f2a3b509bf6faa6b0fc59092d247103c327c726be9e8b0972988e159cdbe478cd51b728828c27a1d138

Download Submit
memory/2148-23-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2932-0-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2932-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2932-7-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download