wannacry | f37ea72f42c0f96a9a638a61dc80ea56cba6e416f08a6d66995d3414010d419d

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
11/05/2024, 05:01

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General

Target
32d9c2457554ed6c883eec0a7c5228a1_JaffaCakes118.dll
Size 5.0MB
Sample240511-fnkaashd22
SHA256 f37ea72f42c0f96a9a638a61dc80ea56cba6e416f08a6d66995d3414010d419d
MD5 32d9c2457554ed6c883eec0a7c5228a1
SHA1 68f6e1fe94e61e71d5125de5f24f5473726d0092
SHA512 4f6576ef0e88a69a57c44a13ea91d45718963e1fc5b14ac487f4c6fb6dc9b7337d86b6d25fdc51e9dae306d81d908b60ebb5b94ca5cdd5886a86b17d9c7b6232
SSDEEP 98304:TDqPoBhz1aRxcSUDk36SAEys+593R8yAVp2H:TDqPe1Cxcxk3ZAECzR8yc4H
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 (3373) 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
4160	mssecsvc.exe
624	mssecsvc.exe
5004	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1080 wrote to memory of 960	1080	rundll32.exe	82
PID 1080 wrote to memory of 960	1080	rundll32.exe	82
PID 1080 wrote to memory of 960	1080	rundll32.exe	82
PID 960 wrote to memory of 4160	960	rundll32.exe	83
PID 960 wrote to memory of 4160	960	rundll32.exe	83
PID 960 wrote to memory of 4160	960	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\32d9c2457554ed6c883eec0a7c5228a1_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1080
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\32d9c2457554ed6c883eec0a7c5228a1_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:960
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4160
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5004

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:624

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

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 fd4dee52b9b3d1f88da60f9afd9d5898b7aca5350449bad83ad9decd8ab2b8b0
MD5 c9df0c59d8d62f3cad3abf93a0ac0302
SHA1 abb093c67c498f1fb1fa9adc179163a16595003c
SHA512 1f577aa1d654f1f6a3de20fbe35aa4c14c108286b129c8d9443d9f167a219b54e774cf02de42ef9d1851d740792a11a634e6dd9bf1bdd9fa533fa150f994ec4a
SSDEEP 98304:XDqPoBhz1aRxcSUDk36SAEys+593R8yAVp2HI:XDqPe1Cxcxk3ZAECzR8yc4HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 3aacdf6cccc1d9d3bf5a99d328705c04d2fcce4557e06ac4494243c81b1da350
MD5 cfcfde8965410063a68b7f638bb0f766
SHA1 f152c2d9be199932b5f65bc815f3411da1b9e10c
SHA512 1f9ac9a9ebc1a794e7e30463272420858d1186da44edda882927dbc2cbd45a4585350953fbfa5ae53ab552d8901609257f7e973d1f89ae7ffa9bb5f97ca346ff
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEys+593R8yAVp2Hj:QqPe1Cxcxk3ZAECzR8yc4Hj
MD5 SHA1 SHA512 SSDEEP