cryptolocker | 7160b2b41f1b7d0b6546663586ad8207c13a5e240d23cbedbfc9ba81ac406d1a

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
04-03-2024 03:15

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General

Target

a769c781e3748314825f3effbd176b9b.exe
Size

400KB
MD5

a769c781e3748314825f3effbd176b9b
SHA1

23b605d66164573492da31bcdffccc01fd9d3957
SHA256

7160b2b41f1b7d0b6546663586ad8207c13a5e240d23cbedbfc9ba81ac406d1a
SHA512

8456c3718f529d17e182b865e8c8fb2c00f43abfaa4eabd024bafa6874ddc90a4eb624229ddbad5e9f0e244ff0de107fbef116038cb72fff13f703b46145c536
SSDEEP

6144:VWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvCvgCSng:VWkEuCaNT85I2vCMX5l+ZRv9CD

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

2260 {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

2260 {34184A33-0407-212E-3320-09040709E2C2}.exe
3048 {34184A33-0407-212E-3320-09040709E2C2}.exe
Loads dropped DLL 2 IoCs

Processes:

a769c781e3748314825f3effbd176b9b.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

pid process

1756 a769c781e3748314825f3effbd176b9b.exe
2260 {34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2260	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
2260	{34184A33-0407-212E-3320-09040709E2C2}.exe
3048	{34184A33-0407-212E-3320-09040709E2C2}.exe

pid	process
1756	a769c781e3748314825f3effbd176b9b.exe
2260	{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-1-5-21-2248906074-2862704502-246302768-1000\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

Processes:

a769c781e3748314825f3effbd176b9b.exe{34184A33-0407-212E-3320-09040709E2C2}.exe

description	pid	process	target process
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	{34184A33-0407-212E-3320-09040709E2C2}.exe

C:\Users\Admin\AppData\Local\Temp\a769c781e3748314825f3effbd176b9b.exe
"C:\Users\Admin\AppData\Local\Temp\a769c781e3748314825f3effbd176b9b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1756

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\a769c781e3748314825f3effbd176b9b.exe"
2⤵
- Deletes itself
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2260

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:3048

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
400KB

MD5
a769c781e3748314825f3effbd176b9b

SHA1
23b605d66164573492da31bcdffccc01fd9d3957

SHA256
7160b2b41f1b7d0b6546663586ad8207c13a5e240d23cbedbfc9ba81ac406d1a

SHA512
8456c3718f529d17e182b865e8c8fb2c00f43abfaa4eabd024bafa6874ddc90a4eb624229ddbad5e9f0e244ff0de107fbef116038cb72fff13f703b46145c536

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