wannacry | 7763b6250f600f368046030fcf8f2b1f859230703aaaf8430af8328a9ef7d15e

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-09-2024 16:48

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General

Target

f26b46cc433aed4de0582355b4a7c58d_JaffaCakes118.dll
Size

5.0MB
MD5

f26b46cc433aed4de0582355b4a7c58d
SHA1

5e4a6a44cb6d7267d258a740795a8b4f379cf53c
SHA256

7763b6250f600f368046030fcf8f2b1f859230703aaaf8430af8328a9ef7d15e
SHA512

feeedc5a303dee11f7f53c30da88db4a5088b80d7d24b83de70f9d063ffff6098531088df7825799d8b6bdd06dbdeff99d84be58ceccd1a2725a3175cffb0840
SSDEEP

24576:JbLgdeQhfdfO6LLuYAMEcpcL7nEaut/8uME7A4kqAH1pNZtA0p+9XEk:JnjQTAMEcaEau3R8yAH1plAH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3287) 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
2052	mssecsvc.exe
2672	mssecsvc.exe
2552	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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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

Modifies data under HKEY_USERS 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 1780 wrote to memory of 3008	1780	rundll32.exe	29
PID 3008 wrote to memory of 2052	3008	rundll32.exe	30
PID 3008 wrote to memory of 2052	3008	rundll32.exe	30
PID 3008 wrote to memory of 2052	3008	rundll32.exe	30
PID 3008 wrote to memory of 2052	3008	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f26b46cc433aed4de0582355b4a7c58d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1780
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f26b46cc433aed4de0582355b4a7c58d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2052
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2552

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2672

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
1135fbfbe829a6856c6d1efe7a295896

SHA1
6ebaf4c8780d298c4100027f5a7fdcdb6bce3104

SHA256
8a06645d0f1a7f9fdf466a6b748ffc2c392d3f757f6eb66932b72ffb3bf61106

SHA512
cea7548ff3c4e51a82012338aca2b3d2a8d85b5a600c5cd0a4f57bf307a32a533448d0c19826239e455762ff9afcb4f510fe5869101c000296c7834d3448b66f

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ee358d031d5245343d07adf01a9de91c

SHA1
e2898fb0fabfa3c24678cd80464e27a91d690db6

SHA256
948bf1408def8719a2afd27a3073321bd58d7ce0454b97f4c6e17f5ffdb5c870

SHA512
67933597b87655bd9e94acd0d5c06876eb3cf02e8c25b1a6f83f5b35ba93a1cb4fbe9a97d5e164e549d773497e19b11c413933da02d552af1c600b60d3035fde

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