wannacry | 655b2581303778df55a5f50edeb62e237ac93187f69168feb2102741a75d8c1b

Analysis

max time kernel
150s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19/05/2024, 22:28

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General

Target
5bcf369a4097b8056922510ad87e79e2_JaffaCakes118.dll
Size 5.0MB
Sample240519-2dspksdh63
SHA256 655b2581303778df55a5f50edeb62e237ac93187f69168feb2102741a75d8c1b
MD5 5bcf369a4097b8056922510ad87e79e2
SHA1 37c351addc6665ea4a00c7d82d7072042b814bf3
SHA512 9a38561cacd885cdc85487d0fcf2e8b4d2ac39438d5ea6c870df9f2544567992624502b68326fc68018da7ca1b60de105578b6a78ec54bf133356118dcd4e8ce
SSDEEP 49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQ:TDqPoBhz1aRxcSUDk
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 (3244) 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
116	mssecsvc.exe
736	mssecsvc.exe
2388	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

Modifies data under HKEY_USERS 5 IoCs

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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3576 wrote to memory of 2960	3576	rundll32.exe	83
PID 3576 wrote to memory of 2960	3576	rundll32.exe	83
PID 3576 wrote to memory of 2960	3576	rundll32.exe	83
PID 2960 wrote to memory of 116	2960	rundll32.exe	84
PID 2960 wrote to memory of 116	2960	rundll32.exe	84
PID 2960 wrote to memory of 116	2960	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5bcf369a4097b8056922510ad87e79e2_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3576
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5bcf369a4097b8056922510ad87e79e2_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2960
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:116
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2388

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

mssecsvc.exe

Path C:\WINDOWS\mssecsvc.exe
Size 3.6MB
SHA256 8fb5c80c995c40e0a64dd13dedffb17061968b54c4be43d4d7feed1fdc79abda
MD5 3e00e530b237ba2a197c7537e3b72c38
SHA1 928f7390c71aa53a9bcda12acb0b22f681261c54
SHA512 22c53c36be4c923820a80f608dd28c968e316962bf054528657b38202b250120cda6d51844b75a3bede4bbfaf81faf0508fbd99a70e9343938728de0d7d3a95c
SSDEEP 49152:XnAQqMSPbcBVQej/1INRx+TSqTdX1HkQ:XDqPoBhz1aRxcSUDk
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 7473c398611ef8dd88f13039a4da33368ed0ac5ff02ec7c96b1d17420288652d
MD5 7ecb4baf9506742fbb1b7c6d2dd1504c
SHA1 b2c64143fb2771bb6e56b9fdf9aabd32ea027a10
SHA512 f5cf7bfc3da1102508a7244721a2fffe4ced382cccc9ba921dc97a44533f824489ded9ca069984e49178244efefeaa28c3dda397dde21cff91357c65de6269d2
SSDEEP 24576:nQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPVXmiHkQg6eB:nQqMSPbcBVQej/1INRx+TSqTdX1HkQ
MD5 SHA1 SHA512 SSDEEP