cryptolocker | d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

Analysis

max time kernel
28s
max time network
22s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
09-09-2024 08:00

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General

Target

{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe
Size

338KB
MD5

04fb36199787f2e3e2135611a38321eb
SHA1

65559245709fe98052eb284577f1fd61c01ad20d
SHA256

d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9
SHA512

533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444
SSDEEP

6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

Score

10^/10

cryptolocker discovery persistence ransomware

Malware Config

Signatures

CryptoLocker
Ransomware family with multiple variants.
ransomware cryptolocker

Deletes itself 1 IoCs

pid	Process
1300	{34184A33-0407-212E-3320-09040709E2C2}.exe

Executes dropped EXE 2 IoCs

pid	Process
1300	{34184A33-0407-212E-3320-09040709E2C2}.exe
2496	{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-1-5-21-661032028-162657920-1226909816-1000\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	{71257279-042b-371d-a1d3-fbf8d2fadffa}.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 6 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1300	1672	{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe	81
PID 1672 wrote to memory of 1300	1672	{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe	81
PID 1672 wrote to memory of 1300	1672	{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe	81
PID 1300 wrote to memory of 2496	1300	{34184A33-0407-212E-3320-09040709E2C2}.exe	82
PID 1300 wrote to memory of 2496	1300	{34184A33-0407-212E-3320-09040709E2C2}.exe	82
PID 1300 wrote to memory of 2496	1300	{34184A33-0407-212E-3320-09040709E2C2}.exe	82

C:\Users\Admin\AppData\Local\Temp\{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe
"C:\Users\Admin\AppData\Local\Temp\{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1672
- 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\{71257279-042b-371d-a1d3-fbf8d2fadffa}.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1300
- - C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w00000234
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2496

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

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

Filesize
338KB

MD5
04fb36199787f2e3e2135611a38321eb

SHA1
65559245709fe98052eb284577f1fd61c01ad20d

SHA256
d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

SHA512
533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads