wannacry | 8149cb8f94b70e380d601f9b172f8e2f764bf417eba0e1d21b3d0e3f4e6eed80

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23/05/2024, 07:53

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General

Target
6a416e51d940fac6e43b7dcdf9d300b7_JaffaCakes118.dll
Size 5.0MB
Sample240523-jrfm3aaa46
SHA256 8149cb8f94b70e380d601f9b172f8e2f764bf417eba0e1d21b3d0e3f4e6eed80
MD5 6a416e51d940fac6e43b7dcdf9d300b7
SHA1 61813e4c6453a5e29984330b9793f1d5bc8d65f7
SHA512 0879129c136bf3ed8664ee6c1ddd1135d5ea35756c156fd34235070aa165a3583b073153e3a05da47ad82a91fa7a3911d0043571ba8816dc774b5d6da6bfc59d
SSDEEP 49152:znAQqMSPbcBVQej/1pxJM0H9PAMEcaEau3R8yAH1plAH:TDqPoBhz1pxWa9P593R8yAVp2H
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 (3297) 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
2456	mssecsvc.exe
2452	mssecsvc.exe
3148	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 4616 wrote to memory of 2432	4616	rundll32.exe	85
PID 4616 wrote to memory of 2432	4616	rundll32.exe	85
PID 4616 wrote to memory of 2432	4616	rundll32.exe	85
PID 2432 wrote to memory of 2456	2432	rundll32.exe	86
PID 2432 wrote to memory of 2456	2432	rundll32.exe	86
PID 2432 wrote to memory of 2456	2432	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6a416e51d940fac6e43b7dcdf9d300b7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\6a416e51d940fac6e43b7dcdf9d300b7_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2432
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2456
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3148

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2452

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 e220d42196477f47673da91c5da56d5c4bf11f02f86fa7195076b31e6cffdff9
MD5 43bb601210825a6e3452d6ac9f158bff
SHA1 2f50bcf101b7460b2f6d095d0984d9ae26c961ec
SHA512 ce9387810830b4d7d21f9ede311125796e3cf69a31bd4d9363bff4336f85af6599e7c28e6522af37e027d3f1da8c83e24933133f2f89f267a6aeb98e6ced0ead
SSDEEP 49152:XnAQqMSPbcBVQej/1pxJM0H9PAMEcaEau3R8yAH1plAHI:XDqPoBhz1pxWa9P593R8yAVp2HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 0f41a967917f442046234f596979644252813ce753bd23ef92868ea33f0ab491
MD5 6b48355a69f5e6760eb6eba36f117a7c
SHA1 8e3fbecc655342dc5e0258488d4669a167f08f3b
SHA512 6502aefc994895ff12761ec22908163c2cbadf4c187b47c01487c91b88f9fd3f85de7eb836e010bb7f0dea9db9adcf1540f15130ca993289f76bddcd61a57f73
SSDEEP 49152:nQqMSPbcBVQej/1pxJM0H9PAMEcaEau3R8yAH1plAHj:QqPoBhz1pxWa9P593R8yAVp2Hj
MD5 SHA1 SHA512 SSDEEP