wannacry | 60f2d2df3fc462ab21f6aac50edbd58f9f2aa2ce917d0eb7132bddf76845c39e

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
26-08-2024 04:12

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General

Target

c24245382f00395061b695c6156301e1_JaffaCakes118.dll
Size

5.0MB
MD5

c24245382f00395061b695c6156301e1
SHA1

dafb0bd90559adb8da2c816172202420fb24ba71
SHA256

60f2d2df3fc462ab21f6aac50edbd58f9f2aa2ce917d0eb7132bddf76845c39e
SHA512

5ba8d775e099b766e8dd1be677e30a278512f821ad2880d325a16020bf4badb11cb3fabf9ccd6c7f0ef6e8714a51ad8861ba2454f6c2b54ae3ac57d66498afee
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAME:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3351) 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
3964	mssecsvc.exe
708	mssecsvc.exe
1120	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 5072 wrote to memory of 388	5072	rundll32.exe	86
PID 5072 wrote to memory of 388	5072	rundll32.exe	86
PID 5072 wrote to memory of 388	5072	rundll32.exe	86
PID 388 wrote to memory of 3964	388	rundll32.exe	87
PID 388 wrote to memory of 3964	388	rundll32.exe	87
PID 388 wrote to memory of 3964	388	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c24245382f00395061b695c6156301e1_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5072
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c24245382f00395061b695c6156301e1_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:388
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3964
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1120

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:708

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
c6d62ea48e907a90d24991dd6d351362

SHA1
84da4f1bd3a269122bf87c3305f00b4cf30befda

SHA256
2744ff187491936c99101cda8a6a7e618ce570d1bffcabdb9d394643d937ffc1

SHA512
5f0d806b111967176de9a682192d6b4bf0f63baa4a511eacbeb66b0a80b279acbfd1aadb46d29b3b386b7bb7ffeb7d945601139322653b0a7d1a2cf7b12e5150

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
18cd1b0fa42b651602d7f2fe9be4496f

SHA1
2a2f6b6478716f0896fba98aec974dd928ee2924

SHA256
4f3b533069c1451dc13c82ad350820ccac8e907e356f2e89d960bdf1c8ab4b65

SHA512
7c4539b175e6c92fbd02c1780f66c7c21c3c481c0f130366f00c0d7304178ad5f3286f730613abe59323f4436610784ab128e7bb5eefabbd6959af05b29a36b0

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