wannacry | eedc35220eca2721d582c7dc3ec15e71d8e9f8edeedbd402b93bc27834d6d796

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
13-05-2024 21:01

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General

Target

3c8dec19fbfc6fae8b1761ff05ef9bb7_JaffaCakes118.dll
Size

5.0MB
MD5

3c8dec19fbfc6fae8b1761ff05ef9bb7
SHA1

5666db57416922573fc322175449a1845a7b4b23
SHA256

eedc35220eca2721d582c7dc3ec15e71d8e9f8edeedbd402b93bc27834d6d796
SHA512

ea6a61f59bedafaca9d1f12978a145ee0dba53c700870f706b1a71e6b72eac902a36d4c9fe2d4532f2d397171e3a67d9b2f8feae5a0941b6fab8f19fcaa2a5be
SSDEEP

98304:T8qPoBhz1aRxcSUDk36SAJ593R8yAVp2H:T8qPe1Cxcxk3ZAJzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3233) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2068 mssecsvc.exe
2692 mssecsvc.exe
2648 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

pid	process
2068	mssecsvc.exe
2692	mssecsvc.exe
2648	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2432 wrote to memory of 2132	2432	rundll32.exe	rundll32.exe
PID 2132 wrote to memory of 2068	2132	rundll32.exe	mssecsvc.exe
PID 2132 wrote to memory of 2068	2132	rundll32.exe	mssecsvc.exe
PID 2132 wrote to memory of 2068	2132	rundll32.exe	mssecsvc.exe
PID 2132 wrote to memory of 2068	2132	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c8dec19fbfc6fae8b1761ff05ef9bb7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2432

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c8dec19fbfc6fae8b1761ff05ef9bb7_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2132

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2068

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2648

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
24d01f3bfa891781d1623c620b1163af

SHA1
024792ae67ec3a0aba77a6f17011f9812a8c26d7

SHA256
7423e629da7e389dd48c3b5b8c835c0a2a9b0c9844c72c28185859a29ccd4f23

SHA512
e9d4dd88c5d1479e3b1ec20e82d51669a8daa64221ca5576186196439fa751b61e3165aba7f5893ec2777e830d104efad531230a0969a6589fc76c694765bad7

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
965fb58a6ecdfbc341d734b961ec6169

SHA1
d92dfcac42429de61564eb5827c6b5f40aba4421

SHA256
5a1290f0da419e81ecb1dad3729747d20753e49ca106cf160f602f4e47f137bf

SHA512
51f5fb4bfadd3de70d83f4c9809ca3b7acc343dd7a7f12873c3bacb18800795cb8992e2186eab288d1f5d0178e7e7368a14ea59d7494b98ea36ad35714033c2c

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