wannacry | 5d7c8a086732b2c1d968f1b6888923a7b874b5b1b7e09fe078c8c55feb421021

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
15-09-2024 15:35

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General

Target

e2d020e6ae743949b87756fc1c34215d_JaffaCakes118.dll
Size

5.0MB
MD5

e2d020e6ae743949b87756fc1c34215d
SHA1

8307a670bd5cbd866fde71d420a08979312b2d52
SHA256

5d7c8a086732b2c1d968f1b6888923a7b874b5b1b7e09fe078c8c55feb421021
SHA512

c920498ae3a47ac15527654549ee948dc6b93f1db738bedf61846a96cdb2563d2a3f99624c81c417dbb14ff5feb3c1a5a5895feb1ce3a6e3245ceae7430c775f
SSDEEP

49152:SnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEc:+8qPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3333) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Executes dropped EXE 3 IoCs

pid	Process
4312	mssecsvc.exe
1220	mssecsvc.exe
3044	tasksche.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 3052	2800	rundll32.exe	81
PID 2800 wrote to memory of 3052	2800	rundll32.exe	81
PID 2800 wrote to memory of 3052	2800	rundll32.exe	81
PID 3052 wrote to memory of 4312	3052	rundll32.exe	82
PID 3052 wrote to memory of 4312	3052	rundll32.exe	82
PID 3052 wrote to memory of 4312	3052	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e2d020e6ae743949b87756fc1c34215d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e2d020e6ae743949b87756fc1c34215d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4312
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3044

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1220

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
8909dbd5b9feba5b5a9cadc6e8d850b5

SHA1
1ebb6fd36521bdf8c15d13b921a9f576d89b1107

SHA256
508dcb3abfa56821f8ed720f616758ca467c49a32785be3311384579c2def1a5

SHA512
1f4d317090b075770a5f61d3b5a4e77f12dcc0e2ba54e73f69b0b3868f256ddfecad344549c50b9e54f94a81e73a43910c56635541d69095c927f78538ddb852

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
7fe62470dc5ee0e84ee02cd5526f7c49

SHA1
02ce9ec4aafca35def3c1cf3f20ec25bb1a793d5

SHA256
08d900ea71c177d36a5556be14111b208b45ffe9b08a813587a4cb3f5b191cf7

SHA512
e5809b14b3f2b070ec1824053b72859a24a23cfc538b4729fe1773a1b86d39e49e2c095522b9f075e4ef4809497c3abd44e23dec453a659f786f60419de30d0b

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