wannacry | bc3fa3aa010bd5abbd65b30a8c8b8ef5353d3ea550985ceb74b0b2af3cb2a7c7

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19-05-2024 18:48

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General

Target

5ae5baa664e07d14aed5dfebbefba84b_JaffaCakes118.dll
Size

5.0MB
MD5

5ae5baa664e07d14aed5dfebbefba84b
SHA1

38b14ab595ad454b4ad0c42fb33f271d74b5a03d
SHA256

bc3fa3aa010bd5abbd65b30a8c8b8ef5353d3ea550985ceb74b0b2af3cb2a7c7
SHA512

eb4f6f51cf8bbbce35c65ce38dd0f083290e8c7a9acc3e9517d2a4df863aebda15fa46d1edee5e7b67465af2479a20a16a81895a291406e4584ba4606ae571ca
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9s3R8yAVp2H:+DqPe1Cxcxk3ZAEUacR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3268) 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

3820 mssecsvc.exe
3932 mssecsvc.exe
1144 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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

pid	process
3820	mssecsvc.exe
3932	mssecsvc.exe
1144	tasksche.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 5 IoCs

Processes:

mssecsvc.exe

description	ioc	process
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1008 wrote to memory of 4544	1008	rundll32.exe	rundll32.exe
PID 1008 wrote to memory of 4544	1008	rundll32.exe	rundll32.exe
PID 1008 wrote to memory of 4544	1008	rundll32.exe	rundll32.exe
PID 4544 wrote to memory of 3820	4544	rundll32.exe	mssecsvc.exe
PID 4544 wrote to memory of 3820	4544	rundll32.exe	mssecsvc.exe
PID 4544 wrote to memory of 3820	4544	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5ae5baa664e07d14aed5dfebbefba84b_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1008

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5ae5baa664e07d14aed5dfebbefba84b_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4544

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3820

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1144

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3932

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
271614d5e0e6a2a4e7d8c003e6874390

SHA1
e1cc9f3d32e62b3c1f5057f987e8504cec7b1585

SHA256
05bd3b58e31c3070ce34ac8d7f7dfff4c687cdca12a2ce4ad6a1733eb4c86115

SHA512
745dbcd15ff11adfaa0d0535d294879cc5ffaa558eb85003efe9e11e28a859f06a986fa24706b27196f29488283af456c29501603a145d3c4296d7cd3096934b

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
8bbc10d1351a924955ce282a8dccc640

SHA1
6995d53c64729fa35969f7e747f8129469a3d0f1

SHA256
be7944d0d4141c1de8f077f10c27e1d0fe5734e2b3083e645069d36cef986faf

SHA512
883a190d6614034dc722b3495097d97363e7340d3f1c024b8284ca837ddf3bf1a74decd83a6d63fe2a19f8af3b740ddedda29d94c241a080e8ccc54b6fb47b16

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