wannacry | a04d2515ca561bc2d19f529de920b896c359ccce7f33294638dc86842e6934c7

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
17/09/2024, 22:30

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General

Target
e7d28ea7b3975ea3d03b60ac3aadc04d_JaffaCakes118.dll
Size 5.0MB
Sample240917-2et9ssyang
SHA256 a04d2515ca561bc2d19f529de920b896c359ccce7f33294638dc86842e6934c7
MD5 e7d28ea7b3975ea3d03b60ac3aadc04d
SHA1 06b60942196774105f1790ed180a5f9bf6dc14d4
SHA512 1cb7dc2434c629d3506c03a44a61a972ff9f905da68e8ebe5d72657757e90fbb7eb1fdb6cbb3d1b14686088a413737c3859f625705dda35dabcdaf34fe51610c
SSDEEP 98304:+DqPoBhz1aRxcSUDk36SAd593R8yAVp2H:+DqPe1Cxcxk3ZAdzR8yc4H
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 (3296) 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
748	mssecsvc.exe
3504	mssecsvc.exe
1144	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 3492 wrote to memory of 4208	3492	rundll32.exe	82
PID 3492 wrote to memory of 4208	3492	rundll32.exe	82
PID 3492 wrote to memory of 4208	3492	rundll32.exe	82
PID 4208 wrote to memory of 748	4208	rundll32.exe	83
PID 4208 wrote to memory of 748	4208	rundll32.exe	83
PID 4208 wrote to memory of 748	4208	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e7d28ea7b3975ea3d03b60ac3aadc04d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3492
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e7d28ea7b3975ea3d03b60ac3aadc04d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4208
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:748
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1144

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:3504

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 e3fd4837e0f9c694476d7e238099b27066a31ce585dc3e2d05dd2eafe18880cf
MD5 10ffef63dc7a3e0ce02ec7a0302d1b6d
SHA1 ddfd3467e7d8eefe6ae0773ec3c2cfa0899ca255
SHA512 f1de1d54a2d06e273e8155ae92309ee2357723229a62932554e6df302403afa67a2bee9dc061d0cdbeb13d1618e43a9a63c2a192c4918cc4455db3e856fc482d
SSDEEP 98304:yDqPoBhz1aRxcSUDk36SAd593R8yAVp2HI:yDqPe1Cxcxk3ZAdzR8yc4HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 64da98abf4fb68313b4240654f524644562fcf21ef55f3263b330a4ae5b6c251
MD5 1e3b4a99db0b565bafecfa70eb3465ad
SHA1 4c39e3d690f08e5f0b3dcdb1a61038a61c0dd9f3
SHA512 0395c1c737037e77c637064fa777e99a9ee47e0fb634d406d91af30e58f06428f1359d65621dc5945cd82a83cb152d851b291ec0af3323beff26772308215489
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAd593R8yAVp2Hj:QqPe1Cxcxk3ZAdzR8yc4Hj
MD5 SHA1 SHA512 SSDEEP