wannacry | 4f8b2591ae22c8cadaee061e46e6ad93f8912a06319b7454e19e85893fc7929e

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
23-08-2024 01:38

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General

Target

b9de290ef3ec191950f0550cf6d14a6f_JaffaCakes118.dll
Size

5.0MB
MD5

b9de290ef3ec191950f0550cf6d14a6f
SHA1

8926858b8703c0a303284ce5d8ae587e42c67324
SHA256

4f8b2591ae22c8cadaee061e46e6ad93f8912a06319b7454e19e85893fc7929e
SHA512

692178874f56991ec7c3970adc05df836c9786b51646aaa651ab1163d75864f188146c92209ba3417c143d9c0b0c7a7bf922b1b9b53c815f2abc2c764558bb2a
SSDEEP

49152:JnjJMSPbcBb/1INRx+TSqTdX1HkQo6SAARdhpk3R8yAH1plA:ddPoBL1aRxcSUDk36SAEdh+3R8yAVp2

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3303) 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
3608	mssecsvc.exe
2256	mssecsvc.exe
2244	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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5004	2244	WerFault.exe	91
1576	2244	WerFault.exe	91

System Location Discovery: System Language Discovery 1 TTPs 4 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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3400 wrote to memory of 2544	3400	rundll32.exe	86
PID 3400 wrote to memory of 2544	3400	rundll32.exe	86
PID 3400 wrote to memory of 2544	3400	rundll32.exe	86
PID 2544 wrote to memory of 3608	2544	rundll32.exe	87
PID 2544 wrote to memory of 3608	2544	rundll32.exe	87
PID 2544 wrote to memory of 3608	2544	rundll32.exe	87
PID 3608 wrote to memory of 2244	3608	mssecsvc.exe	91
PID 3608 wrote to memory of 2244	3608	mssecsvc.exe	91
PID 3608 wrote to memory of 2244	3608	mssecsvc.exe	91

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9de290ef3ec191950f0550cf6d14a6f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3400
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b9de290ef3ec191950f0550cf6d14a6f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3608
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2244
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2244 -s 220
        5⤵
        Program crash
        
        PID:5004
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2244 -s 224
        5⤵
        Program crash
        
        PID:1576

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2256

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2244 -ip 2244
1⤵
PID:2528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2244 -ip 2244
1⤵
PID:3312

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\tasksche.exe

Filesize
3.4MB

MD5
0d4019652b4a71bdfb941fe4a4b57eac

SHA1
674108e9ccd4d5ad28696a4d2d291822a07acdbb

SHA256
35e8518bd85fbef05aaf095984e0ca658595c3878c6b13dbd1ec6eab8dc64860

SHA512
b0e59c9463bad0b63e5a6bc4a09d00a0d92617e7be651c7ec5eedef06c53274f294d87da1471b3201f3cd88a7f10c5cb5b5ac019e664a08d0007d3e7dec3dd22

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C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
78f8bf2607bd58232157b444a11f1b14

SHA1
5d82908aa114e962d48cab4ce0485740a7f27a2e

SHA256
3309eca5ad0c78fe84377bd3d30627d7f969e6542012e97a53b5dc9ed1d2f227

SHA512
40197feda797b70647716f13099a8c3993c36c0f10ee2c0215144a11fe4af1cdce0a5775b03454889ab2e17cf8c8f6da6e47eb4024393c2db536778e84546acd

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