wannacry | 74f4a8e66cd56e53ca9a343cb189fab9af688f3840a20faa7503f3d37e29f482

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220718-en
resource tags

arch:x64arch:x86image:win10v2004-20220718-enlocale:en-usos:windows10-2004-x64system
submitted
20-07-2022 01:39

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General

Target

a49f1950d6e7ba759eb5b582fd93615e.dll
Size

5.0MB
MD5

a49f1950d6e7ba759eb5b582fd93615e
SHA1

f2046042d74f5ce2f9c53231d75ff89ac93a39aa
SHA256

74f4a8e66cd56e53ca9a343cb189fab9af688f3840a20faa7503f3d37e29f482
SHA512

24ffb245dfb168cd7675ab9f24f0a58183e9e2107917f1e82eb1720f69f5ea0e9221a271e7335c918903dd2fe6443cc44874ea9d361660819f42fa9c8f5c1993

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3288) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

1972 mssecsvc.exe
4640 mssecsvc.exe
1640 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 Scanning
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
1972	mssecsvc.exe
4640	mssecsvc.exe
1640	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 1680 wrote to memory of 5032	1680	rundll32.exe	rundll32.exe
PID 1680 wrote to memory of 5032	1680	rundll32.exe	rundll32.exe
PID 1680 wrote to memory of 5032	1680	rundll32.exe	rundll32.exe
PID 5032 wrote to memory of 1972	5032	rundll32.exe	mssecsvc.exe
PID 5032 wrote to memory of 1972	5032	rundll32.exe	mssecsvc.exe
PID 5032 wrote to memory of 1972	5032	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a49f1950d6e7ba759eb5b582fd93615e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a49f1950d6e7ba759eb5b582fd93615e.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:5032

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1972

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1640

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4640

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe

Filesize
3.6MB

MD5
4f2082112f45afcef2d9fd4fa5673e58

SHA1
5f926f458f621394c1cfce65d72d34a32846dd50

SHA256
1a6f8a619fde4602f18002572865b5e8b4afad43c32a49e6d0a409739cdeab79

SHA512
a34e897d7200bf90793bb70de0303ea464f22d22eb842040f2cf7e74078502d33067b69a87e82205ab751ed5c2cd4390715c35202c9dba9de76f61187ec1acf7

Download Submit
C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
4f2082112f45afcef2d9fd4fa5673e58

SHA1
5f926f458f621394c1cfce65d72d34a32846dd50

SHA256
1a6f8a619fde4602f18002572865b5e8b4afad43c32a49e6d0a409739cdeab79

SHA512
a34e897d7200bf90793bb70de0303ea464f22d22eb842040f2cf7e74078502d33067b69a87e82205ab751ed5c2cd4390715c35202c9dba9de76f61187ec1acf7

Download Submit
C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
4f2082112f45afcef2d9fd4fa5673e58

SHA1
5f926f458f621394c1cfce65d72d34a32846dd50

SHA256
1a6f8a619fde4602f18002572865b5e8b4afad43c32a49e6d0a409739cdeab79

SHA512
a34e897d7200bf90793bb70de0303ea464f22d22eb842040f2cf7e74078502d33067b69a87e82205ab751ed5c2cd4390715c35202c9dba9de76f61187ec1acf7

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a35f182e6d53b2961fee59261746f726

SHA1
51cd13eff08eca6a84e43717a7b09eff658cc437

SHA256
ca61efd76013c26beb9c1c51ecb105f990199709a3709a0413620f924b1c1aaf

SHA512
9e840a3599d0dc63e16b037b431b0e9aa3649fa1966b75bc9f0c890b89022390b4312f00a194e5b99a9751b883f2e9e6c6896fc57f520ddc7661791be850e060

Download Submit
memory/1972-131-0x0000000000000000-mapping.dmp

Download
memory/5032-130-0x0000000000000000-mapping.dmp

Download