wannacry | e8578e18b2ad35198b4fb1a09914a41677f17071fc8fdede0474825a75f0d568

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
28-09-2024 12:48

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General

Target

fc5566ab098c75742a5b338466736767_JaffaCakes118.dll
Size

5.0MB
MD5

fc5566ab098c75742a5b338466736767
SHA1

9a3bf8693724166a7b9b03200e33bb41022defe3
SHA256

e8578e18b2ad35198b4fb1a09914a41677f17071fc8fdede0474825a75f0d568
SHA512

c9f5c66da366271253fde8e0c7a08dcda04302d445027e47940746fa8285dd4bc3a420842045b826ee1b71f647d84c140a70dbb921b6235b05c20bd5c0c60fac
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:+DqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3358) 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
4904	mssecsvc.exe
3592	mssecsvc.exe
5036	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 4476 wrote to memory of 2520	4476	rundll32.exe	82
PID 4476 wrote to memory of 2520	4476	rundll32.exe	82
PID 4476 wrote to memory of 2520	4476	rundll32.exe	82
PID 2520 wrote to memory of 4904	2520	rundll32.exe	83
PID 2520 wrote to memory of 4904	2520	rundll32.exe	83
PID 2520 wrote to memory of 4904	2520	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fc5566ab098c75742a5b338466736767_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fc5566ab098c75742a5b338466736767_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2520
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4904
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5036

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:3592

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
4cf4687db57bb306c5a6976178703ae8

SHA1
b9e78db1abb86a1663742881a94098feff65c7e6

SHA256
5a5fd3d6ed7fd42e23f243e9ce775b43dff7161d45c451e3a4e8fe4a1057cddb

SHA512
108dcf22f92bf1a739ec90e328c2369eb4ee2db24dcc1fbaea588da54b24b977765398f885d4d44b62a3f920a9eb5c0f021a3e3a78544e3cf57a09ec840fac26

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e68e21d147c21fdd1c40aed741554a15

SHA1
15410640500f30aa74c6cf7d550d8e5f0a7fb453

SHA256
315cca9401898ed966dfa6c410506c2b4d0d0ebdfe2428560e9475048eac3ed3

SHA512
167459f45d8420c4bd481d3e3df13927cd322c22f1f1e0fbf70739ed2e9baead8fd8cb6dad9501259cee79dd0aa0ab27caf566685e3f4da02811d7b7b91a9a7a

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