wannacry | fb3144f536e4b1ee02ba4698c360e8fec5fd3ddde25f93c040a88858422c7590

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
18-09-2024 18:22

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General

Target

e9b7c0d4438a38ec814e5c194f777eae_JaffaCakes118.dll
Size

5.0MB
MD5

e9b7c0d4438a38ec814e5c194f777eae
SHA1

33407e8584e25c369d3c9effb356b560be97f9fe
SHA256

fb3144f536e4b1ee02ba4698c360e8fec5fd3ddde25f93c040a88858422c7590
SHA512

7733024f459abfe3eb3081524d385473744fb8a31626969f1f01437efe68fa82bf736e345c31c3b82d50dd4a9d14f061de63c1ebc61a67fbbee969fca2eac69a
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdh:TDqPoBhz1aRxcSUDk36SAEdh

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3241) 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
2492	mssecsvc.exe
3192	mssecsvc.exe
1292	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 2204 wrote to memory of 4848	2204	rundll32.exe	82
PID 2204 wrote to memory of 4848	2204	rundll32.exe	82
PID 2204 wrote to memory of 4848	2204	rundll32.exe	82
PID 4848 wrote to memory of 2492	4848	rundll32.exe	83
PID 4848 wrote to memory of 2492	4848	rundll32.exe	83
PID 4848 wrote to memory of 2492	4848	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9b7c0d4438a38ec814e5c194f777eae_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9b7c0d4438a38ec814e5c194f777eae_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4848
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2492
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1292

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:3192

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
61e45922d90f054d101fa2580afb76b6

SHA1
ff305983f3d2719d6c993a0f25c7f9e6cfa28705

SHA256
3390b4265f7ca133343dc761cd7996303a8b1de8bc7e3e19751c100539920d57

SHA512
7227b5c48a3384df524011d4ca814ee66e8ac3514a68dd996d3475d700261a931fde2cd1e830686fca16e31e1e9654ef85f29787e029e202742b63f41d10c139

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c85689d84c278a2fdd27a93a221a12d2

SHA1
93290a748287362ff4242b2b4dcf2fe01056c743

SHA256
f46a7bcc473cc83eb96a76fbeed8feb5c8729279f1c3d305d6713286d8917945

SHA512
50369826934d5cead77af96f6049b70bd7ad71e97960249a567fae8c6261442b477c724085b8a2c1c78228e0c81f0f784a2c6c4aeb76174a6b0bfb393407b13a

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