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

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

Executes dropped EXE 2 IoCs

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

Loads dropped DLL 2 IoCs

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

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

description	pid	Process	procid_target
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	28
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	28
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	28
PID 1756 wrote to memory of 2260	1756	a769c781e3748314825f3effbd176b9b.exe	28
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	29
PID 2260 wrote to memory of 3048	2260	{34184A33-0407-212E-3320-09040709E2C2}.exe	29

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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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads