wannacry | f48583b02557fd2b1cea800f78feefedb5c8a55407e3d47ccdcb0795972d656e

Analysis

max time kernel
150s
max time network
156s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03-06-2024 16:24

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General

Target

926f3cd8824b8c54a03535c2a84b2ab7_JaffaCakes118.dll
Size

5.0MB
MD5

926f3cd8824b8c54a03535c2a84b2ab7
SHA1

ad851086b2f99d366fa81c2933450ac88970a8c1
SHA256

f48583b02557fd2b1cea800f78feefedb5c8a55407e3d47ccdcb0795972d656e
SHA512

8682f734a216fdc607ee2a8fdd70abe310db6c6b90e4b90d7c175c182631d7815095e0f4e5af4c49adee9c9ef39102e621d4e0ad93612a9063556ea2aa7447b4
SSDEEP

98304:+8qPoBhz1aRxcSUDk36SAvxWa9s3R8yAVp2H:+8qPe1Cxcxk3ZAYakR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3296) 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

2984 mssecsvc.exe
2924 mssecsvc.exe
2680 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
2984	mssecsvc.exe
2924	mssecsvc.exe
2680	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 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2344 wrote to memory of 2952	2344	rundll32.exe	rundll32.exe
PID 2952 wrote to memory of 2984	2952	rundll32.exe	mssecsvc.exe
PID 2952 wrote to memory of 2984	2952	rundll32.exe	mssecsvc.exe
PID 2952 wrote to memory of 2984	2952	rundll32.exe	mssecsvc.exe
PID 2952 wrote to memory of 2984	2952	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\926f3cd8824b8c54a03535c2a84b2ab7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2344

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\926f3cd8824b8c54a03535c2a84b2ab7_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2952

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2984

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2680

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:2924

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
d7f304f00423af6e72265bd4dda5bc9b

SHA1
ed7bb35e7a726dd2dbc48dc63e77a9650973ea9e

SHA256
1ffa214b95f9e985a59bfe161dfd157b3be206080d7d0109356a56a665aef865

SHA512
aa5f3b99bf989228116172289c67ecb970bdcacdc0d563044832fd3bef39410143b72e1801210bf52a25cdbd26985d5a7719bef0d48ce8fdf8487481ed36e86a

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
635212243c6088aa3a61841a30c45a51

SHA1
295965d036c7432770b52581ac170934245aa1a9

SHA256
56275a34e70f74bb2db6708acd3765a421a0b6dcbdd44a02319bcb585556d20f

SHA512
bcdc3f9577aa7df151154f9e2bcded69cf852cc7ef5b2a78ecb50828c26b73df83b757d561bfd88e7bc62603c68f27bc3b44df9baf06acabedc25f3886609a9a

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