wannacry | 05db4f6d2715f067d3b212bbbd91aafc4a6d66316ddd6e7e4a523f31841b4bc3

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
07-05-2024 10:31

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General

Target

20520a36e7273a3b6128369fa72c1aa7_JaffaCakes118.dll
Size

5.0MB
MD5

20520a36e7273a3b6128369fa72c1aa7
SHA1

02276c660f3622a32ed8c5ba9cd42a42269e2a17
SHA256

05db4f6d2715f067d3b212bbbd91aafc4a6d66316ddd6e7e4a523f31841b4bc3
SHA512

bcb2aa934e58f3f48c59dcf3c24ea41de1e83510382d790cd5b152161b037ee27c59bb546cbc82e0933782d8d0761a808ff9ce00fa9883907e7d7f677a6111f4
SSDEEP

98304:TDqPoBhzPyqRxcSUDk36SAEdhvxWa9P593RzPfwo:TDqPeaSxcxk3ZAEUadzRLfw

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3252) 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

3768 mssecsvc.exe
2120 mssecsvc.exe
3648 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
3768	mssecsvc.exe
2120	mssecsvc.exe
3648	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\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

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1260 wrote to memory of 3300	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 3300	1260	rundll32.exe	rundll32.exe
PID 1260 wrote to memory of 3300	1260	rundll32.exe	rundll32.exe
PID 3300 wrote to memory of 3768	3300	rundll32.exe	mssecsvc.exe
PID 3300 wrote to memory of 3768	3300	rundll32.exe	mssecsvc.exe
PID 3300 wrote to memory of 3768	3300	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\20520a36e7273a3b6128369fa72c1aa7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1260

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\20520a36e7273a3b6128369fa72c1aa7_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3300

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3768

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3648

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2120

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

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
12571b32d19fa9904c6f32767d4fcf0f

SHA1
e74311167a6217d18b072ff8d3db60500fc46ed5

SHA256
728074fb4460965c8453c0b5391f357a823d8dbbfe813de7537f47c457d41b17

SHA512
2743ccca3231567fbb05df4505c38f0a5ba76d5491d135526a644b8ccf03593bbf8ca845d6d0407ea000ab2b4d9a92e390ab400fe2b0090dbe8f9083125b197f

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
8c85005c14587a10a1b60b3937c13f53

SHA1
8d1f617f79c7a43eb1df16d5dbf636a08a1172cb

SHA256
cad50a877a8985ac024e9b4ac95f9b6f3a31dbfc5112d2dbca605af15c83a13a

SHA512
eb89c2a838aba2a74e8b196ca608e660a2863dd6dd0c11266f2c694beafc606d0bde6bc29c7ad7003a06715e46b58518001860224b6463e33fe807628e1c6591

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