cryptolocker | 3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
04/03/2024, 03:17

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General

Target
a9c7211eb7e2a5bacb6256554ca760fc.exe
Size 412KB
Sample240304-ds3akahc65
SHA256 3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb
MD5 a9c7211eb7e2a5bacb6256554ca760fc
SHA1 a7c811659c1062b42a6d29cbed1cca8d38e6af6d
SHA512 c19c5d87c67fd73f07ddb303ea3627b460cfd57d0ee36a1d9694cec0ace699bef0ab46d8faa5d935de2132deaa17a3f629db5f28d561ec8207f89eda1603c374
SSDEEP 6144:EWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCBt933bpyjzx4oQDxS2g:EWkEuCaNT85I2vCMX5l+ZRvUtZC
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
3424	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 2 IoCs

pid	Process
3424	{34184A33-0407-212E-3320-09040709E2C2}.exe
2936	{34184A33-0407-212E-3320-09040709E2C2}.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3528 wrote to memory of 3424	3528	a9c7211eb7e2a5bacb6256554ca760fc.exe	88
PID 3528 wrote to memory of 3424	3528	a9c7211eb7e2a5bacb6256554ca760fc.exe	88
PID 3528 wrote to memory of 3424	3528	a9c7211eb7e2a5bacb6256554ca760fc.exe	88
PID 3424 wrote to memory of 2936	3424	{34184A33-0407-212E-3320-09040709E2C2}.exe	89
PID 3424 wrote to memory of 2936	3424	{34184A33-0407-212E-3320-09040709E2C2}.exe	89
PID 3424 wrote to memory of 2936	3424	{34184A33-0407-212E-3320-09040709E2C2}.exe	89

C:\Users\Admin\AppData\Local\Temp\a9c7211eb7e2a5bacb6256554ca760fc.exe
"C:\Users\Admin\AppData\Local\Temp\a9c7211eb7e2a5bacb6256554ca760fc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3528
- C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
  "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\a9c7211eb7e2a5bacb6256554ca760fc.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:3424
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w00000220
    3⤵
    - Executes dropped EXE
    PID:2936

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

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Downloads

{34184A33-0407-212E-3320-09040709E2C2}.exe

Path C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
Size 412KB
SHA256 3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb
MD5 a9c7211eb7e2a5bacb6256554ca760fc
SHA1 a7c811659c1062b42a6d29cbed1cca8d38e6af6d
SHA512 c19c5d87c67fd73f07ddb303ea3627b460cfd57d0ee36a1d9694cec0ace699bef0ab46d8faa5d935de2132deaa17a3f629db5f28d561ec8207f89eda1603c374
SSDEEP 6144:EWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCBt933bpyjzx4oQDxS2g:EWkEuCaNT85I2vCMX5l+ZRvUtZC
MD5 SHA1 SHA512 SSDEEP

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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