wannacry | bc618b7ddd672c575e8a624d50d21a9ac6ce33df9ca62fb42f72d1a50b0e0489

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
28-09-2024 02:55

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General

Target

fb5de52c034669c51327ab62cc751ca3_JaffaCakes118.dll
Size

5.0MB
MD5

fb5de52c034669c51327ab62cc751ca3
SHA1

10f84fa83905dda60ecbb009abd48d236e6431c6
SHA256

bc618b7ddd672c575e8a624d50d21a9ac6ce33df9ca62fb42f72d1a50b0e0489
SHA512

0d5fd1a5619aaff0d45459e289cc8ff30701cc32ad44adfca7179bdc284ddca4d9ee3c52b12ad260a2749752af080ad7633e55e78eae0997644917802aed7cf1
SSDEEP

49152:SnjQqMSPbcBVQej/1INRx+TSqTdX1HkQYAMEcaEau3R8yAFHAD:+8qPoBhz1aRxcSUDkn593R8yA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3221) 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
4464	mssecsvc.exe
4920	mssecsvc.exe
4552	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 2748 wrote to memory of 904	2748	rundll32.exe	82
PID 2748 wrote to memory of 904	2748	rundll32.exe	82
PID 2748 wrote to memory of 904	2748	rundll32.exe	82
PID 904 wrote to memory of 4464	904	rundll32.exe	83
PID 904 wrote to memory of 4464	904	rundll32.exe	83
PID 904 wrote to memory of 4464	904	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fb5de52c034669c51327ab62cc751ca3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fb5de52c034669c51327ab62cc751ca3_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:904
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4464
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4552

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4920

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
ea8097eab115bd657a19c29ac3b37d86

SHA1
dfa70772d299e4074156edd79cfc40c9fc7de45f

SHA256
74ebf956d373dd23e9678bf4b9d884d011248e3a7ef4b4ee2b5481b11b791a18

SHA512
3b314ee9e0fb9d4dd69f436771cd6232940d5343aaf2f65126e394ea2765b857b64aa40233845b060f373ad74621c604a0598696e785427826a324ce28c6f058

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e2a2138a1b3a86f2709abb37791ce846

SHA1
9985c8a25c9036ecf3a003c160a4c456d7f387ca

SHA256
f9d6691d392786b9c1e8837591daaf088ad15d09703042813c3ec05658d8f42b

SHA512
b841be76136f17d392bd7447961ffd3bfbc114e1f073b38d5207032ffa9e77fd0d7654ee5532e6c71cab6bb4cbae3bf22b533387a13df58004ac1cadb65a21dc

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