cryptolocker | 3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
04-03-2024 03:17

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General

Target

a9c7211eb7e2a5bacb6256554ca760fc.exe
Size

412KB
MD5

a9c7211eb7e2a5bacb6256554ca760fc
SHA1

a7c811659c1062b42a6d29cbed1cca8d38e6af6d
SHA256

3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb
SHA512

c19c5d87c67fd73f07ddb303ea3627b460cfd57d0ee36a1d9694cec0ace699bef0ab46d8faa5d935de2132deaa17a3f629db5f28d561ec8207f89eda1603c374
SSDEEP

6144:EWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCBt933bpyjzx4oQDxS2g:EWkEuCaNT85I2vCMX5l+ZRvUtZC

Score

10^/10

cryptolocker persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
2032	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 2 IoCs

pid	Process
2032	{34184A33-0407-212E-3320-09040709E2C2}.exe
2620	{34184A33-0407-212E-3320-09040709E2C2}.exe

Loads dropped DLL 2 IoCs

pid	Process
2372	a9c7211eb7e2a5bacb6256554ca760fc.exe
2032	{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-1-5-21-3452737119-3959686427-228443150-1000\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 8 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2032	2372	a9c7211eb7e2a5bacb6256554ca760fc.exe	28
PID 2372 wrote to memory of 2032	2372	a9c7211eb7e2a5bacb6256554ca760fc.exe	28
PID 2372 wrote to memory of 2032	2372	a9c7211eb7e2a5bacb6256554ca760fc.exe	28
PID 2372 wrote to memory of 2032	2372	a9c7211eb7e2a5bacb6256554ca760fc.exe	28
PID 2032 wrote to memory of 2620	2032	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2032 wrote to memory of 2620	2032	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2032 wrote to memory of 2620	2032	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2032 wrote to memory of 2620	2032	{34184A33-0407-212E-3320-09040709E2C2}.exe	29

C:\Users\Admin\AppData\Local\Temp\a9c7211eb7e2a5bacb6256554ca760fc.exe
"C:\Users\Admin\AppData\Local\Temp\a9c7211eb7e2a5bacb6256554ca760fc.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2372
- 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
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w000000C8
    3⤵
    - Executes dropped EXE
    PID:2620

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

\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe

Filesize
412KB

MD5
a9c7211eb7e2a5bacb6256554ca760fc

SHA1
a7c811659c1062b42a6d29cbed1cca8d38e6af6d

SHA256
3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb

SHA512
c19c5d87c67fd73f07ddb303ea3627b460cfd57d0ee36a1d9694cec0ace699bef0ab46d8faa5d935de2132deaa17a3f629db5f28d561ec8207f89eda1603c374

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads