wannacry | e4e2cd1dd0441222a603c461a038411f6389b2921d6ccd30f9eb681b56a030cc

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13-08-2024 18:45

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General

Target

944ab019a42c553cb734ef14135164e2_JaffaCakes118.dll
Size

5.0MB
MD5

944ab019a42c553cb734ef14135164e2
SHA1

728547bc93f13257bf88a2826f601dcd28401979
SHA256

e4e2cd1dd0441222a603c461a038411f6389b2921d6ccd30f9eb681b56a030cc
SHA512

b636cf7fa05d3de61770d528fc848193afca64ca8f1a687b777a3150a9949ace4d349fe18d6a526bd9a085b610de1a0da6b971470a4dbf2a310ab9933a164519
SSDEEP

98304:+DWPoBzz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DWP41Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3232) 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
3996	mssecsvc.exe
2644	mssecsvc.exe
4232	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 4912 wrote to memory of 2032	4912	rundll32.exe	84
PID 4912 wrote to memory of 2032	4912	rundll32.exe	84
PID 4912 wrote to memory of 2032	4912	rundll32.exe	84
PID 2032 wrote to memory of 3996	2032	rundll32.exe	85
PID 2032 wrote to memory of 3996	2032	rundll32.exe	85
PID 2032 wrote to memory of 3996	2032	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\944ab019a42c553cb734ef14135164e2_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\944ab019a42c553cb734ef14135164e2_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3996
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4232

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:2644

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
fbeeee0c8724a0cfcb62da7b1efb69b6

SHA1
87e403c78dc64cfdaef85b484689ce56ad223829

SHA256
134c9839b425e212a7528d4ef83bb285ada52ca0f21df4f55d6d232f8a8cff0f

SHA512
00747eae4b11f3a26e74a2504d22cc587abcb928f86b68010002ab2e2267f8f0b4348b097bfdd9e28f1abf67fbb61462dfcfc82c1eceeae8b4bc9a2adfe586e0

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
7dc624fcf5891d44b82d0c436e33ed5d

SHA1
93c04f328b1747983ed0d409e0378f6c0713901e

SHA256
24f6448aa0fbf52818b7d7223d85fa05799a6b186b2b1f71b51bc0afa2027818

SHA512
095ffdcf2844209ecef4284b211e1ce9c96aa5d95420e5f2b7e5683c3024e1fb5b7f7e68264e7575599aa8242323b2de6ef8bf5a96a532196915e3ffd6d00d08

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