wannacry | e8b0cf1c2cbaa415e564afc05ce5db0e01ef1fcfb308a3e303a70482a6cced18

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 09:10

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General

Target

f5ac93d521cfd625d87b50b492a1ff77_JaffaCakes118.dll
Size

5.0MB
MD5

f5ac93d521cfd625d87b50b492a1ff77
SHA1

25ff4dfa446ad77f0803515171346db172aec684
SHA256

e8b0cf1c2cbaa415e564afc05ce5db0e01ef1fcfb308a3e303a70482a6cced18
SHA512

eee683ce8fc0bb0aebc983534f29039b463424fbadce5936502d4e8609df4062343399bed2e3de96015d0f04cb99d02ae3d6a10d446b7241c9c46cfc6ea2cd1c
SSDEEP

49152:SnAQqMSPbcBVONRx+TSqTdX1HkQo6SAAR:+DqPoBeRxcSUDk36SAE

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3278) 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
2536	mssecsvc.exe
2856	mssecsvc.exe
4760	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 820 wrote to memory of 4516	820	rundll32.exe	84
PID 820 wrote to memory of 4516	820	rundll32.exe	84
PID 820 wrote to memory of 4516	820	rundll32.exe	84
PID 4516 wrote to memory of 2536	4516	rundll32.exe	85
PID 4516 wrote to memory of 2536	4516	rundll32.exe	85
PID 4516 wrote to memory of 2536	4516	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f5ac93d521cfd625d87b50b492a1ff77_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:820
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f5ac93d521cfd625d87b50b492a1ff77_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4516
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2536
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4760

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:2856

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
c55a841fb8f3cc45b1aee019f7171f13

SHA1
3fc6e608a3cfb2d9ae6b26ce5a3f73ebec49005a

SHA256
fd8032cd34e8dd7b5e883caffd9d93f718e2f9967d09c98aafeb0827534ec9c8

SHA512
b04923139898024f2fbdd20699f3ac70b6aed2451fcf1edea4691429bb583826f3183ac10030773069645f6930d13feca14a5ef7b397d65a857fe2845532b680

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
d959a0de68213cf8b146af398b839685

SHA1
d4a43ce02a078e5b53a43b875c0d458de1b3fd4b

SHA256
799876d844bb49622f63d5fbc7b40cfc521f07aed6e534d38a864c7b3ca7475e

SHA512
eebf8d0aa625fae297aa6a223e30c8bcf2f39d5c7d28d4d6ff6f73b080d212d8f8be2dceba646d563b6e201b4e45cdba53e984ead472286c37dc24c5ce12fa98

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