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
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

Processes:

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

pid process

3424 {34184A33-0407-212E-3320-09040709E2C2}.exe
Executes dropped EXE 2 IoCs

Processes:

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

pid process

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

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

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

Processes:

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

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

Processes:

a9c7211eb7e2a5bacb6256554ca760fc.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

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

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

C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
Filesize
412KB

MD5
a9c7211eb7e2a5bacb6256554ca760fc

SHA1
a7c811659c1062b42a6d29cbed1cca8d38e6af6d

SHA256
3386dcb841b528ec70cb2c44ef5eaed7a12eaee4afcc69047f0770303bdb9fdb

SHA512
c19c5d87c67fd73f07ddb303ea3627b460cfd57d0ee36a1d9694cec0ace699bef0ab46d8faa5d935de2132deaa17a3f629db5f28d561ec8207f89eda1603c374

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