cryptolocker | 9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-12-2024 19:11

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General

Target

de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe
Size

355KB
MD5

de400607d06b41a6f8b0935c3607541d
SHA1

f9924a0eb4e715f2c5e370235d39f295b6f95aa8
SHA256

9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734
SHA512

4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e
SSDEEP

6144:MzsQe4NQnn7swHWLJwpFHBqZ4IBbe5RJ7GgcbjYkuyfRVnL:MzReciWLMFh4DYRJ7EYklpp

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
224	Avywuixyxmexxtr.exe

Executes dropped EXE 2 IoCs

pid	Process
224	Avywuixyxmexxtr.exe
2808	Avywuixyxmexxtr.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*CryptoLocker = "C:\\Users\\Admin\\AppData\\Local\\Avywuixyxmexxtr.exe"	Avywuixyxmexxtr.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	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Avywuixyxmexxtr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Avywuixyxmexxtr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3448 wrote to memory of 224	3448	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	82
PID 3448 wrote to memory of 224	3448	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	82
PID 3448 wrote to memory of 224	3448	de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe	82
PID 224 wrote to memory of 2808	224	Avywuixyxmexxtr.exe	84
PID 224 wrote to memory of 2808	224	Avywuixyxmexxtr.exe	84
PID 224 wrote to memory of 2808	224	Avywuixyxmexxtr.exe	84

C:\Users\Admin\AppData\Local\Temp\de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3448
- C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
  "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" "-rC:\Users\Admin\AppData\Local\Temp\de400607d06b41a6f8b0935c3607541d_JaffaCakes118.exe"
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:224
- - C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe
    "C:\Users\Admin\AppData\Local\Avywuixyxmexxtr.exe" -w258
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2808

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\Local\Avywuixyxmexxtr.exe

Filesize
355KB

MD5
de400607d06b41a6f8b0935c3607541d

SHA1
f9924a0eb4e715f2c5e370235d39f295b6f95aa8

SHA256
9ec4697891cc6c9add803044a29bdd9d05701509b9eddc370d4caf00c15ef734

SHA512
4c7949096a20017489635d5440ab46513ccf12fe9cb57a1a0b0fd609db9ccf624bf1623d254c2adba8c510f4fcda1dc6b521a6b66860f7904cc8baac45f8018e

Download Submit
memory/224-10-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/224-11-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/224-15-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/224-19-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2808-13-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2808-14-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/2808-16-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/3448-2-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/3448-1-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/3448-8-0x0000000000400000-0x0000000000465000-memory.dmp

Filesize
404KB

Download
memory/3448-9-0x000000000045B000-0x0000000000460000-memory.dmp

Filesize
20KB

Download
memory/3448-0-0x000000000045B000-0x0000000000460000-memory.dmp

Filesize
20KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads