wannacry | fc7b58c22d9f27207af9c640c751dcab61fd90621ed9df95591d78b2758073f5

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-01-2025 03:46

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General

Target

fc7b58c22d9f27207af9c640c751dcab61fd90621ed9df95591d78b2758073f5.dll
Size

5.0MB
MD5

9cccad94729abbbd27c8071de58402b9
SHA1

0bbd3b74d2fae3564266b63fc251860e48bd77bd
SHA256

fc7b58c22d9f27207af9c640c751dcab61fd90621ed9df95591d78b2758073f5
SHA512

2209d4267c07de089fef98bcf4d6d5ff82cb5621e74da5650e620ffb5b68ae5148c92d355ce9accdb951d1f4a831ee08def663d43916de94e39284eadc24637f
SSDEEP

98304:+Dpz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DB1Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3276) 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

pid	Process
3824	mssecsvc.exe
4384	mssecsvc.exe
1096	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

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1980	1096	WerFault.exe	86

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe

Modifies data under HKEY_USERS 5 IoCs

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 9 IoCs

description	pid	Process	procid_target
PID 2444 wrote to memory of 2508	2444	rundll32.exe	83
PID 2444 wrote to memory of 2508	2444	rundll32.exe	83
PID 2444 wrote to memory of 2508	2444	rundll32.exe	83
PID 2508 wrote to memory of 3824	2508	rundll32.exe	84
PID 2508 wrote to memory of 3824	2508	rundll32.exe	84
PID 2508 wrote to memory of 3824	2508	rundll32.exe	84
PID 3824 wrote to memory of 1096	3824	mssecsvc.exe	86
PID 3824 wrote to memory of 1096	3824	mssecsvc.exe	86
PID 3824 wrote to memory of 1096	3824	mssecsvc.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fc7b58c22d9f27207af9c640c751dcab61fd90621ed9df95591d78b2758073f5.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fc7b58c22d9f27207af9c640c751dcab61fd90621ed9df95591d78b2758073f5.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2508
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3824
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1096
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1096 -s 220
        5⤵
        Program crash
        
        PID:1980

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1096 -ip 1096
1⤵
PID:3076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
25e8bf1ff6b34d9acc77b9991f68409a

SHA1
a7a8e6276085c8ee8b5ccd06c7d5e50c2ab09242

SHA256
77e60d31d67d5630139d1efddaefd95d9b2881be83c312d31381ef29a20d4773

SHA512
f298a44952308916e20fea593b7c234179b88df7a3269a5e48040b2e8efca72b9354c4eff88a2dd4cebc9a44c251c1a0face06ac2b8512e9eb1d221acca04fb9

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a848c62d74569affba05ee92d4033a36

SHA1
c2139d51d68e5244cf180ec047ff501226cb77bd

SHA256
c3f5e8d93aaed9bc2fd5fea724cd35c1affacb1679c1fdbb5acd3762582eb7b8

SHA512
a0e32e8e03183ecf687f546b64882bfba104067b68f13d1f9645c9c0b3b385e96719ed81701cb335b3f053a818c44c06e7f6ca6ccda3984590bf8fe67ea61896

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