wannacry | c93d64322829ede29e935e4b620b8c3777f4ea6ac8e72c127c2126b83e66ba2a

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Analysis

max time kernel
91s
max time network
92s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
17-05-2024 00:55

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General

Target

4d32605bc1a5c408f1a34b99fc38a893_JaffaCakes118.dll
Size

5.0MB
MD5

4d32605bc1a5c408f1a34b99fc38a893
SHA1

b77132e8981ce9c59cd5271ed230e8ab44ce43cd
SHA256

c93d64322829ede29e935e4b620b8c3777f4ea6ac8e72c127c2126b83e66ba2a
SHA512

8949c614a1ed3c9f87446e9bd2e073d06caa2b2190718160e13328ff9078a963005bb27ee12b35319584e404648a91de40aa7c260916d0d8ce69a9943a5004cf
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:+DqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1670) 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

2588 mssecsvc.exe
924 mssecsvc.exe
2276 tasksche.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

pid	process
2588	mssecsvc.exe
924	mssecsvc.exe
2276	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
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
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

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4100 wrote to memory of 4956	4100	rundll32.exe	rundll32.exe
PID 4100 wrote to memory of 4956	4100	rundll32.exe	rundll32.exe
PID 4100 wrote to memory of 4956	4100	rundll32.exe	rundll32.exe
PID 4956 wrote to memory of 2588	4956	rundll32.exe	mssecsvc.exe
PID 4956 wrote to memory of 2588	4956	rundll32.exe	mssecsvc.exe
PID 4956 wrote to memory of 2588	4956	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d32605bc1a5c408f1a34b99fc38a893_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4100

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4d32605bc1a5c408f1a34b99fc38a893_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4956

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2588

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2276

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:924

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3188

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
a81c3d7e35a3280005559ddcef569749

SHA1
13d8f78714b5c127a8c288ffdc81a1f6d0fe705a

SHA256
3983b27334df3aa1d3d7266323bc0551dee435be0e08966811d921cd5c86947b

SHA512
77c8c38ae0a19141375f9573485882386196a348e3246fbf3a32fd1087eb6a99e7897f50d10d02114d4c4b2b4480f226c9a9efcea63cc8d3df799af5ce883aff

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
6ea306ffbf10904cf1738b501ddb2635

SHA1
2b0a99db1c72bafe1ecac594bd92f9264f95c2d2

SHA256
75f2e5d3e43f3372d94a525ef96cf8f82568093679f7120ac68e49dc68d0e91e

SHA512
bea52683ebecde3c4813d41f766dd8919a5d0fd99ae22df3bfe54c76fd6ae716fddac63172b267e03dc72147fb00e8b1f517f853c0c99164f7b3388f64ddeb60

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