wannacry | bf617a8d7e19719a7a568f9a80e79e34e1997c9e856bf61e1161e6dd7ad544bd

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
21-09-2024 20:26

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General

Target

f08c407de6e22ce3bbe53946f04b3709_JaffaCakes118.dll
Size

5.0MB
MD5

f08c407de6e22ce3bbe53946f04b3709
SHA1

5637e34b9b2c09d60db257f5b1686e825226ba95
SHA256

bf617a8d7e19719a7a568f9a80e79e34e1997c9e856bf61e1161e6dd7ad544bd
SHA512

43431f0a32597be007b17a51d89a9872d7fc6d4f2249ada09eb2810fc0a7dafefece83b3489ec07d878cef289de1a354b3bf806cea3bf4a743a30aba4f14e043
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAQ593R8yAVp2H:+DqPe1Cxcxk3ZAQzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3312) 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
4364	mssecsvc.exe
3352	mssecsvc.exe
4648	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\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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 4204	916	rundll32.exe	82
PID 916 wrote to memory of 4204	916	rundll32.exe	82
PID 916 wrote to memory of 4204	916	rundll32.exe	82
PID 4204 wrote to memory of 4364	4204	rundll32.exe	83
PID 4204 wrote to memory of 4364	4204	rundll32.exe	83
PID 4204 wrote to memory of 4364	4204	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f08c407de6e22ce3bbe53946f04b3709_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:916
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f08c407de6e22ce3bbe53946f04b3709_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4204
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4364
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4648

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:3352

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
d409956c355ccf276223cd5e55ce5a4d

SHA1
576981afb99f7b3dc61cccab842910886e6991e7

SHA256
953c1d65ffb029ff2b8b26dd67583c83861ef52b66db1f6b5db03dfc33044d97

SHA512
19bef5a9b03a28daa10a9d444c863122c0a90f4371eef2cce10197e6fb41db8791dc3e85070dc6b8846ae436ce2f63c1c278deed04b520260f2b2203636314d6

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
8ecf2a77fbc2a49749409dcc7fd8445c

SHA1
207663726684eb84d34d16df2a389b2892e333c5

SHA256
59c3d851ddff0463e6683b4353c23ce0fd67dfa2d7ffe259e806c1dafb69d6e2

SHA512
a8c567193cf2d1521f850789127bf2c814a7f95c2bd05899cf4a6a8b1dd25da9a7861c0f60f3172523f1c0302d27e88a79b3950d7ba086ecf4dfde5f6e7ad7e7

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