5ab3680bbf2b723a8f7177ee56c70c58bff76ec71fded77d877b0525fe0b1d76

Analysis

max time kernel
5s
max time network
144s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-02-2024 01:35

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General

Target

2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe
Size

34KB
MD5

4b1301486cb8657dad2401864c183e62
SHA1

6abfed205222cc2215ed822d400dcd15e2ebce11
SHA256

5ab3680bbf2b723a8f7177ee56c70c58bff76ec71fded77d877b0525fe0b1d76
SHA512

0424f00eca7058ad887e63f04df7c2caa154210b749792b2a54c076bf7c36955e6c8f677af02647a8e9d928b1776524df2fc0a2026b9c6ebaa14193faa248875
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQA15O:b/yC4GyNM01GuQMNXw2PSjHC02ltA7O

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x0009000000012261-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
1640	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2328	2024-02-24_4b1301486cb8657dad2401864c183e62_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
2328	2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe
1640	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 1640	2328	2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe	28
PID 2328 wrote to memory of 1640	2328	2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe	28
PID 2328 wrote to memory of 1640	2328	2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe	28
PID 2328 wrote to memory of 1640	2328	2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-24_4b1301486cb8657dad2401864c183e62_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2328
- 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:1640

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
2503cc02b7297c789d5594e2552ab663

SHA1
6d9018d055dcb22f54d7a4210c95afc44c8ebe8c

SHA256
f5a424732988998797e393a784bdeb6b4374116bcba1774d6627981cfd3f52ba

SHA512
e16a0dedf3f49af6870bae9c4b13251f6011a2cf7f2f579e3838680061b71df16bf2e85392f1520dad12e0ebe96a70cf1a7013552f1d22c097942c87e17fdab6

Download Submit
memory/1640-16-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2328-0-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2328-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2328-6-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download