wannacry | 0a547edd3c73c87c7796377bee53ed0024edb35a9c9c1e4a62735909643a4ca2

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
25-09-2024 15:58

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General

Target

f65b4cc9a87df1dd14918f8d295af7ea_JaffaCakes118.dll
Size

5.0MB
MD5

f65b4cc9a87df1dd14918f8d295af7ea
SHA1

397e761ab1ae29c593b88199150d38e7bd7e5782
SHA256

0a547edd3c73c87c7796377bee53ed0024edb35a9c9c1e4a62735909643a4ca2
SHA512

7ee60ab115c68fa1a37b4cd5c74d4d8f852d17d8dca13e66af615a96303f6fb3e4a6399db14c28acda6eccd71b0c7d039e399126cf2d171b2361751a4f658828
SSDEEP

98304:d8qPonhz1aRxcSUDkuxWa9P593R8yAVp2H:d8qPM1CxcxkhadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3307) 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
640	mssecsvc.exe
3828	mssecsvc.exe
404	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 4072 wrote to memory of 2476	4072	rundll32.exe	82
PID 4072 wrote to memory of 2476	4072	rundll32.exe	82
PID 4072 wrote to memory of 2476	4072	rundll32.exe	82
PID 2476 wrote to memory of 640	2476	rundll32.exe	83
PID 2476 wrote to memory of 640	2476	rundll32.exe	83
PID 2476 wrote to memory of 640	2476	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f65b4cc9a87df1dd14918f8d295af7ea_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4072
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f65b4cc9a87df1dd14918f8d295af7ea_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2476
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:640
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:404

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3828

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
bf914d1d0fb0f1dfd5fbb11ad151635e

SHA1
3eee822a80e45b5e5213ab76e4352c68d8d4f452

SHA256
684776549b3dee267f9de4e6dff872db586b7bf598fb0a12ec8502f27a8f585f

SHA512
0bac688199ec50ef9fea640778a2dbbb50f6cab3fcd221fcbc9eb51a8d0b9ae211f94580238abb466c1cf8850edec051d627503e2735625df740754b0e53007e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
fd8c1e7fd01012f3af5fe6b77066a95f

SHA1
ef75e7626e63144fbdcd2e475362bfd8fc323598

SHA256
bf2ed6dd2a7bb1ea1c9acf3f0ca2f32ba41e5083d6af10140259f0b439bf2ec3

SHA512
29f0bb27a1e51dec26df80c5433d5bbffe8f9391ea7ca15df4de747b3341403f3fd43f438bc13f4b103adfd12232428069040d5eb39ed099714b8a5fa720f534

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