b81ac905cf95ea885d23ca3dc04aadf990918dc57e5e671ea53f925e2896e7e2

Analysis

max time kernel
13s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 07:35

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General

Target

2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe
Size

34KB
MD5

63a255ba2161eccedf74ee312c42bda6
SHA1

744ec005642d7dbaff7207092b257d24f91c3645
SHA256

b81ac905cf95ea885d23ca3dc04aadf990918dc57e5e671ea53f925e2896e7e2
SHA512

aefa8d6639ecd22157c729588beda48d9fc848026f4c523810c8aca232aa68823720b045cd576073674debb8186dd4ee83b56c4043c6486576d7dd1e71fe6bd8
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQA3U:b/yC4GyNM01GuQMNXw2PSjHC02ltAk

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000c000000012258-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1808	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2340	2024-02-23_63a255ba2161eccedf74ee312c42bda6_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
2340	2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe
1808	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 1808	2340	2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe	28
PID 2340 wrote to memory of 1808	2340	2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe	28
PID 2340 wrote to memory of 1808	2340	2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe	28
PID 2340 wrote to memory of 1808	2340	2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_63a255ba2161eccedf74ee312c42bda6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2340
- 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:1808

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

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Downloads

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

Filesize
34KB

MD5
05f13aa1dbf1193e7ae65f01c2f7a4ac

SHA1
77753b6c348bf7940bbc2ef1bd141dd6268e5014

SHA256
4187f3fe8a335ec4e1497acc32c70d83ae2675da71251ac68b0594b0cce15c26

SHA512
6788ea8c56ff5577c8102e8f1f543adbe43e1d7d5857b5d1f33a3780818422b6eefd3b364ec33917ecc06a8897f0876e6a3c4fa1f23979cdc3c306a84e023804

Download Submit
memory/1808-18-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2340-0-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2340-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2340-2-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download