wannacry | f1e276efe42dcb89b2c061bb14c68c9db8d15bc1647f849475e1796992eacbf5

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
14/09/2024, 01:03

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General

Target
df36dea50835289e2bfaa623724a5c23_JaffaCakes118.dll
Size 5.0MB
Sample240914-behmwszbja
SHA256 f1e276efe42dcb89b2c061bb14c68c9db8d15bc1647f849475e1796992eacbf5
MD5 df36dea50835289e2bfaa623724a5c23
SHA1 d78fab0eeeca60fe2a4269ddc1e81b4b35472d01
SHA512 7281cd01b9a3efa41fd107abb55dbd3b0bdff92b7d42e51addd14998752a958dac3621f050a173adb5e753f53992861a3170577faddaf4fba8675bbb2a3d7ade
SSDEEP 98304:TDqPoBhz1aRxcSUDk36SAEdhvnUxuxZwLFGjaOgdN:TDqPe1Cxcxk3ZAETKOS02Oy
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3276) 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
2576	mssecsvc.exe
3708	mssecsvc.exe
1096	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
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 2916 wrote to memory of 4840	2916	rundll32.exe	83
PID 2916 wrote to memory of 4840	2916	rundll32.exe	83
PID 2916 wrote to memory of 4840	2916	rundll32.exe	83
PID 4840 wrote to memory of 2576	4840	rundll32.exe	84
PID 4840 wrote to memory of 2576	4840	rundll32.exe	84
PID 4840 wrote to memory of 2576	4840	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\df36dea50835289e2bfaa623724a5c23_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\df36dea50835289e2bfaa623724a5c23_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4840
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2576
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1096

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:3708

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 e69f1c60f66b43b8536f267af27456b9022ebfda4e5a694b42d0d07fe9c67ee1
MD5 d97fa7effec66c70c1a804e56ee2d6f9
SHA1 66b2e23045a3528ef5a97112da44233462bbbf2b
SHA512 76965a2a0ba4974988efdc1344d6639ec71be178f59f79b9bf9fbcf5cee2810d0016207e11c4679c4c3ee18e14afc75397c2ec4033ea72973bbe014a90b79f16
SSDEEP 98304:XDqPoBhz1aRxcSUDk36SAEdhvnUxuxZwLFGjaOgdNI:XDqPe1Cxcxk3ZAETKOS02OyI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 3e190b7c5993fa42c58ca7233b5f46be6fd1621a2ab1256c93ec0398bf322424
MD5 a545c54887b60c7ae0468d102ff79221
SHA1 1db8fac4a5931060c88c077f575fbbe0e421c90a
SHA512 877e2787fb798786c94d2fe7ef7860c88c4e1980f00a91d788e5c70643181a7a8deeecb529f81419971ae02957b2ad1699a808c5214d3acf75d47acc356fc3df
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvnUxuxZwLFGjaOgdNj:QqPe1Cxcxk3ZAETKOS02Oyj
MD5 SHA1 SHA512 SSDEEP