wannacry | 8894c72a0b866791306652940b2e214bfb2bdd204e887a365989a02a216baa4f

Analysis

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

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 14:57

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General

Target

c536e9cf3bc585a121dd8b3fa7195438_JaffaCakes118.dll
Size

5.0MB
MD5

c536e9cf3bc585a121dd8b3fa7195438
SHA1

0d7c501366205122942a915ae5a2d0fe2fa83074
SHA256

8894c72a0b866791306652940b2e214bfb2bdd204e887a365989a02a216baa4f
SHA512

9f1fa58e9ac1a5d67031fae2e1dd4d5f40c2940e2e9f2a8019c7a6ea282c2aac3df59a6d408df1f5bc9f98f326b72524877a19fa11ed40b48fe3ce58c3c9bddf
SSDEEP

6144:yE9l9yUqIYVTH5DgSg8ajldktM0XXrC2QhMV9qEBLIwYQuy8DLq1eN:yvbLgPlu7QhMbpIMu7L5N

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2124) 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
2780	mssecsvc.exe
2000	mssecsvc.exe
3616	tasksche.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 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4740 wrote to memory of 2776	4740	rundll32.exe	84
PID 4740 wrote to memory of 2776	4740	rundll32.exe	84
PID 4740 wrote to memory of 2776	4740	rundll32.exe	84
PID 2776 wrote to memory of 2780	2776	rundll32.exe	85
PID 2776 wrote to memory of 2780	2776	rundll32.exe	85
PID 2776 wrote to memory of 2780	2776	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c536e9cf3bc585a121dd8b3fa7195438_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4740
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c536e9cf3bc585a121dd8b3fa7195438_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2780
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3616

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2000

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
2002cb267acc51f922e6cbe12ca5e98d

SHA1
592a659209e92cadd7c20bc1a3aa92db3fc057bb

SHA256
ea363724a3d1ccf677b37139d078f55b727c9a7a75dbbf35881a83f3a750b359

SHA512
bd3c9106e3bac6235d2ba49f43b50d65deb321a6aabf21f57216ef13b07eaf666a47b52a266ca60a1c357457b04e14f0cd0bd3a9ea46f33258b9e367289cf59e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
367293bbb0287c5e4875f60ec25d1e3b

SHA1
b121c4ca6ab46c6715674094e9c1f549b43a4953

SHA256
af2a8d125bd2948bc63bab2339022777e79e0d72481eb49996b4f084373a653c

SHA512
8083bd43ad7675f0f4fdf62c17365ea74a8e27fde597cb1cf3dff0233e9a370e0f7641b42447e7ac313047561342c65d382c34a1e5eb296d1562036e1299e2c2

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