wannacry | 99c7b66c0df1b9225da8e149c6557767f9afb7341ee89491638ecc9769555bd2

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 03:19

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General

Target

8df901b394371435f697f65468303eb3.dll
Size

5.0MB
MD5

8df901b394371435f697f65468303eb3
SHA1

9b6db81939b0b43b202f31c1f56de72fbfb7fb11
SHA256

99c7b66c0df1b9225da8e149c6557767f9afb7341ee89491638ecc9769555bd2
SHA512

3a94a223fc316f56fbd9e3603fcaa300ca1a5ab22e2dd3132f1009cbdca96a5e72a93c1ed42ac5d4174a183102caee6eedb0cbd68bc469a851aa38e93cb2d539

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3086) 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

4544 mssecsvc.exe
1740 mssecsvc.exe
1672 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
4544	mssecsvc.exe
1740	mssecsvc.exe
1672	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 2632 wrote to memory of 2228	2632	rundll32.exe	rundll32.exe
PID 2632 wrote to memory of 2228	2632	rundll32.exe	rundll32.exe
PID 2632 wrote to memory of 2228	2632	rundll32.exe	rundll32.exe
PID 2228 wrote to memory of 4544	2228	rundll32.exe	mssecsvc.exe
PID 2228 wrote to memory of 4544	2228	rundll32.exe	mssecsvc.exe
PID 2228 wrote to memory of 4544	2228	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8df901b394371435f697f65468303eb3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2632

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8df901b394371435f697f65468303eb3.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2228

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4544

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1672

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1740

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
6ed8f46cab5a3dfe36054fe65b30026e

SHA1
62620d4f3e08aeccd95878c683090e60b7a6a221

SHA256
ebb9a19d9b280d560a651a089cd7148559c3a72b301cb8036cc4ed22259c587d

SHA512
3d9d6e6585f859daf083cec0231955d4a04d185468f15336f39f958837a3f19c223f8d47405b72f4e0088ad9c7c053067a94b939a1635d8eb8d76015b5d3be05

Download Submit
C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
6ed8f46cab5a3dfe36054fe65b30026e

SHA1
62620d4f3e08aeccd95878c683090e60b7a6a221

SHA256
ebb9a19d9b280d560a651a089cd7148559c3a72b301cb8036cc4ed22259c587d

SHA512
3d9d6e6585f859daf083cec0231955d4a04d185468f15336f39f958837a3f19c223f8d47405b72f4e0088ad9c7c053067a94b939a1635d8eb8d76015b5d3be05

Download Submit
C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
6ed8f46cab5a3dfe36054fe65b30026e

SHA1
62620d4f3e08aeccd95878c683090e60b7a6a221

SHA256
ebb9a19d9b280d560a651a089cd7148559c3a72b301cb8036cc4ed22259c587d

SHA512
3d9d6e6585f859daf083cec0231955d4a04d185468f15336f39f958837a3f19c223f8d47405b72f4e0088ad9c7c053067a94b939a1635d8eb8d76015b5d3be05

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
65f2298f3612c8ddf837b938c942cd7b

SHA1
fdf7a4694f5912630e6c24fd449870fa37fce3f9

SHA256
5c9e2b6c604f4a43845a261e6385866e20a3aaa7f59f595537e17812f33ed5db

SHA512
b313685298ddd7aea0abb5cc5212466464c3677781c65c66201851d760c247f8c36145a3f6cb35344d086b7bbeb86186dd39ea5c8a4216adcab1e86ada169d75

Download Submit
memory/2228-130-0x0000000000000000-mapping.dmp

Download
memory/4544-131-0x0000000000000000-mapping.dmp

Download