cryptolocker | ab097e8b19ec166a2ff65d10ab06a8d572216cee2b0c44ebe183a8cb60b2bae7

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
21-12-2023 21:06

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General

Target

0a92daa19f2cc77a21cdbf8db6d8bb68.exe
Size

684KB
MD5

0a92daa19f2cc77a21cdbf8db6d8bb68
SHA1

2074cf815217641a38f5243b8d35bc4e74ec8d31
SHA256

ab097e8b19ec166a2ff65d10ab06a8d572216cee2b0c44ebe183a8cb60b2bae7
SHA512

3c4f44578df40d952df7330ed9ab6e7df14a2332a864a894e1c34215ad4e4399f9959bf53c60c8e98de15d806630e2a72d622d2eeced3eac22d579fb0f9f45ec
SSDEEP

12288:gysoBJKquCdZ6hMDi2WgjbA+Jyrd/PaL7hc4cQFGI:GYJKqNdlDi2WOJMdea4vGI

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
2448	Avywuixyxmexxtr.exe

Executes dropped EXE 2 IoCs

pid	Process
2448	Avywuixyxmexxtr.exe
2804	Avywuixyxmexxtr.exe

Loads dropped DLL 3 IoCs

pid	Process
1452	0a92daa19f2cc77a21cdbf8db6d8bb68.exe
1452	0a92daa19f2cc77a21cdbf8db6d8bb68.exe
2448	Avywuixyxmexxtr.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1452 wrote to memory of 2448	1452	0a92daa19f2cc77a21cdbf8db6d8bb68.exe	28
PID 1452 wrote to memory of 2448	1452	0a92daa19f2cc77a21cdbf8db6d8bb68.exe	28
PID 1452 wrote to memory of 2448	1452	0a92daa19f2cc77a21cdbf8db6d8bb68.exe	28
PID 1452 wrote to memory of 2448	1452	0a92daa19f2cc77a21cdbf8db6d8bb68.exe	28
PID 2448 wrote to memory of 2804	2448	Avywuixyxmexxtr.exe	29
PID 2448 wrote to memory of 2804	2448	Avywuixyxmexxtr.exe	29
PID 2448 wrote to memory of 2804	2448	Avywuixyxmexxtr.exe	29
PID 2448 wrote to memory of 2804	2448	Avywuixyxmexxtr.exe	29

C:\Users\Admin\AppData\Local\Temp\0a92daa19f2cc77a21cdbf8db6d8bb68.exe
"C:\Users\Admin\AppData\Local\Temp\0a92daa19f2cc77a21cdbf8db6d8bb68.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1452
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\0a92daa19f2cc77a21cdbf8db6d8bb68.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2448
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w124
    3⤵
    - Executes dropped EXE
    PID:2804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe

Filesize
684KB

MD5
0a92daa19f2cc77a21cdbf8db6d8bb68

SHA1
2074cf815217641a38f5243b8d35bc4e74ec8d31

SHA256
ab097e8b19ec166a2ff65d10ab06a8d572216cee2b0c44ebe183a8cb60b2bae7

SHA512
3c4f44578df40d952df7330ed9ab6e7df14a2332a864a894e1c34215ad4e4399f9959bf53c60c8e98de15d806630e2a72d622d2eeced3eac22d579fb0f9f45ec

Download Submit
memory/1452-0-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/1452-1-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/1452-2-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/1452-14-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/2448-16-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/2448-15-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/2448-26-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/2448-30-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2804-22-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/2804-23-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download
memory/2804-27-0x0000000000400000-0x00000000004CF000-memory.dmp

Filesize
828KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads