wannacry | bae676adf235b1ec80ef24c7db5531ce7ac1a3c74124bbe405e9f4c98d358624

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
25-08-2024 03:58

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General

Target

bff0aa6595e3fc250a32ada5ca1c0cfe_JaffaCakes118.dll
Size

5.0MB
MD5

bff0aa6595e3fc250a32ada5ca1c0cfe
SHA1

c9b1d78fe33b96b883af27aa01bc55fb52a22bb6
SHA256

bae676adf235b1ec80ef24c7db5531ce7ac1a3c74124bbe405e9f4c98d358624
SHA512

34ded1f942eaca5c96b664e1c2d65ab73f0dea8589390027a0c569d7a03aa7590fb168bca797c0a19efb5468d92b3cacde48dde6540c873680f42258dbec39a1
SSDEEP

12288:yvbLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DHeQYSUjEXFO:SbLgddQhfdmMSirYbcMNgef0QeQjG

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3196) 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
5096	mssecsvc.exe
2656	mssecsvc.exe
1452	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

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3572 wrote to memory of 948	3572	rundll32.exe	84
PID 3572 wrote to memory of 948	3572	rundll32.exe	84
PID 3572 wrote to memory of 948	3572	rundll32.exe	84
PID 948 wrote to memory of 5096	948	rundll32.exe	85
PID 948 wrote to memory of 5096	948	rundll32.exe	85
PID 948 wrote to memory of 5096	948	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bff0aa6595e3fc250a32ada5ca1c0cfe_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3572
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bff0aa6595e3fc250a32ada5ca1c0cfe_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:948
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:5096
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1452

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:2656

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
5935f949fac3bda42bd4804f1844d49d

SHA1
39fc4f70494507c5c240ad45794db06d1b5497d0

SHA256
2805f6018ef47934a84094ec9846d7628c793926b261bf96ce71d82c6a3740c2

SHA512
6f96c6ff9f77551dfe7b1db90caa0a4c740016ba3cccc703379bd298362c7e1dd0163639d1dbb6364f3d041fb396caaf870b299016abc9074d0c3dcd83cafdd2

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
8a8867441d89de126f8e9591e767af9b

SHA1
d1626e2852dc713e3268f5788783bc8d911df7cd

SHA256
1cbcbf5a77d2d235bfc6dcf769169f6b0d96c0377bcaa128589025bb9d8cec9a

SHA512
2a1de2ca77b529fcfe640436eaab51755a1c673a27ef6c06261ddee7df98df4b048ea645494f0a384253cfa5e277e1167cb294ebab7de00eed7cc57b4a6afedb

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