wannacry | 3c6433fe316f20bdba715677dfe8205e57a3c166b41712251f21f6d12287a16c

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
21-07-2024 11:01

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General

Target

3c6433fe316f20bdba715677dfe8205e57a3c166b41712251f21f6d12287a16c.dll
Size

5.0MB
MD5

3c63f9be8f7752de7f002ed0c3bdfddf
SHA1

7a0c5379a5e6ed41a8240e7f0e2005b1cd58d500
SHA256

3c6433fe316f20bdba715677dfe8205e57a3c166b41712251f21f6d12287a16c
SHA512

9b0ad7f482f709811a6febae0ce4f22baf2e6151f5684e072805affea866a874b8759823d6abcddcc9aa322fe3b5363aa6e1bf9da39052fe56a7105a79a1c782
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 (3161) 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

3400 mssecsvc.exe
3568 mssecsvc.exe
4052 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:

mssecsvc.exerundll32.exe

description ioc process

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

pid	process
3400	mssecsvc.exe
3568	mssecsvc.exe
4052	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4372 wrote to memory of 4180	4372	rundll32.exe	rundll32.exe
PID 4372 wrote to memory of 4180	4372	rundll32.exe	rundll32.exe
PID 4372 wrote to memory of 4180	4372	rundll32.exe	rundll32.exe
PID 4180 wrote to memory of 3400	4180	rundll32.exe	mssecsvc.exe
PID 4180 wrote to memory of 3400	4180	rundll32.exe	mssecsvc.exe
PID 4180 wrote to memory of 3400	4180	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c6433fe316f20bdba715677dfe8205e57a3c166b41712251f21f6d12287a16c.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4372

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3c6433fe316f20bdba715677dfe8205e57a3c166b41712251f21f6d12287a16c.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4180

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3400

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4052

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3568

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
441bbb7bed0a43129bf8bcf99fc64889

SHA1
20d871c1938f16036b79cb7eee8c747d4e3c47f9

SHA256
ad251857262c02bae7c4836172ba77af86a46b6d2442c9f158fcbb1226d9099c

SHA512
7d0008428f7d0af720e6c0672126178d54a0533c3c94b5a4649daffe3e8c8858704f08508c1f4cd58fcd19db3b33daa4bed8d216c8aaf51e5c4bd2f598217c05

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
34de8be969a83865dd37c378b7cea60d

SHA1
d3c07ba3907737c05af16ec1e1fbdb19e32680f8

SHA256
8184218abffccce34002ef7abca6ead0d717ec967870cd8e60304d00a5b4a999

SHA512
3a091f12c4feb491208d762a87d1351e3941d8d15934f067576e64a91f27aa006eae01ca00cce795652b07b909dd9f7f69fbb5a39c46db6222393bb4cc46077c

Download Submit