cryptolocker | 6a2182ea1c216225c21a14ee4881a3c3fa6a6784bf118c7bac4f776eb38849fd

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20250207-en
resource tags

arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
submitted
24/02/2025, 17:30

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General

Target

2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe
Size

338KB
MD5

573799bdde2568a3072a371887c73f9c
SHA1

b58e183fb32054b46dc996bb5f86326acb7b80f0
SHA256

6a2182ea1c216225c21a14ee4881a3c3fa6a6784bf118c7bac4f776eb38849fd
SHA512

804c1c24d37b06480311cb92b1900f2b874925b2dd46ba4a248efa853a5dfb6055aca4546522fc128426d5e56119cc03e7462279211f1c0b9b292107f205a80c
SSDEEP

6144:sWmw0EuC40pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCxNT85I2vCMX5l+ZRv

Score

10^/10

cryptolocker discovery persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker
Cryptolocker family
cryptolocker

Deletes itself 1 IoCs

pid	Process
1620	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 2 IoCs

pid	Process
1620	{34184A33-0407-212E-3320-09040709E2C2}.exe
2300	{34184A33-0407-212E-3320-09040709E2C2}.exe

Loads dropped DLL 2 IoCs

pid	Process
2480	2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe
1620	{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-1-5-21-677481364-2238709445-1347953534-1000\Software\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Roaming\\{34184A33-0407-212E-3320-09040709E2C2}.exe"	{34184A33-0407-212E-3320-09040709E2C2}.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{34184A33-0407-212E-3320-09040709E2C2}.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	{34184A33-0407-212E-3320-09040709E2C2}.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2480 wrote to memory of 1620	2480	2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe	30
PID 2480 wrote to memory of 1620	2480	2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe	30
PID 2480 wrote to memory of 1620	2480	2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe	30
PID 2480 wrote to memory of 1620	2480	2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe	30
PID 1620 wrote to memory of 2300	1620	{34184A33-0407-212E-3320-09040709E2C2}.exe	31
PID 1620 wrote to memory of 2300	1620	{34184A33-0407-212E-3320-09040709E2C2}.exe	31
PID 1620 wrote to memory of 2300	1620	{34184A33-0407-212E-3320-09040709E2C2}.exe	31
PID 1620 wrote to memory of 2300	1620	{34184A33-0407-212E-3320-09040709E2C2}.exe	31

C:\Users\Admin\AppData\Local\Temp\2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2480
- 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\2025-02-24_573799bdde2568a3072a371887c73f9c_cryptolocker.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1620
- - 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
    - System Location Discovery: System Language Discovery
    PID:2300

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
338KB

MD5
573799bdde2568a3072a371887c73f9c

SHA1
b58e183fb32054b46dc996bb5f86326acb7b80f0

SHA256
6a2182ea1c216225c21a14ee4881a3c3fa6a6784bf118c7bac4f776eb38849fd

SHA512
804c1c24d37b06480311cb92b1900f2b874925b2dd46ba4a248efa853a5dfb6055aca4546522fc128426d5e56119cc03e7462279211f1c0b9b292107f205a80c

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads