wannacry | d243449d988ac7aa72ba11b19c453180c8a866d58b19a2316580fa56fa6de5db

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 15:57

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General

Target

c550bb3bf70dd6c92584eb9efd28bd20_JaffaCakes118.dll
Size

5.0MB
MD5

c550bb3bf70dd6c92584eb9efd28bd20
SHA1

e24cea987579cf2779c75387329a8bd5a312f84e
SHA256

d243449d988ac7aa72ba11b19c453180c8a866d58b19a2316580fa56fa6de5db
SHA512

d8d811c2b00a94ab337a960724c69016113c4380a82d22ae35c97588180d8ab4f55c1d15a41601f35ffbd65967741f86b33a0c480ad3e89dcb83bb8f47600da1
SSDEEP

49152:SnAQGpQ6v+cS/8qOxOWbVrlC7J6UNBq4JwAXLy30hQn/+qE3EFOmH:+DGpZ885j8JXBqAwAXWkhQWh3EFOM

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3237) 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
1384	mssecsvc.exe
3924	mssecsvc.exe
3152	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
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 1676	1936	rundll32.exe	84
PID 1936 wrote to memory of 1676	1936	rundll32.exe	84
PID 1936 wrote to memory of 1676	1936	rundll32.exe	84
PID 1676 wrote to memory of 1384	1676	rundll32.exe	85
PID 1676 wrote to memory of 1384	1676	rundll32.exe	85
PID 1676 wrote to memory of 1384	1676	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c550bb3bf70dd6c92584eb9efd28bd20_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c550bb3bf70dd6c92584eb9efd28bd20_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1676
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1384
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3152

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:3924

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

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
f8b99975b5ac5aa053326d8810319334

SHA1
83f967a31821f521c195097ab8c74cc79c1b4385

SHA256
da7872255460dc111e93e530a20f317c97b5253ad0c77acea08ca7783242b8b7

SHA512
226311b531bd25c9dca118c4ca7ab92bcbe11328e7b89bc7fa9263c5d1d6fe636bad8ef30916d6c939db2da465b884d1cb8ebfa927902e5e3e0a0ffcf6278531

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e91af2e4499714307e1f11ecc884b6c8

SHA1
c9a02799f5b69258d015216e932c2b70a7cd2708

SHA256
62436eb4641b0ab0f4571c8f1f3da06b776810c8ca717b7d39ced8f0cfe1f42d

SHA512
5b828e6cd821f723c5b4a612f33605791d399d5b2e87ec72500207bb76ccd70f98b0b9d326f445cc9b404a05ed57b792133cce83f38f73e62c28710a25ae610b

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