wannacry | 0b63a547f7b13e87bbfce8d2517d7433e485e9f6355c5fd4461e3505a8120afc

Analysis

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

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-01-2025 22:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

ef1a139863c90dc1fbdbc3036256e913.dll
Size

5.0MB
MD5

ef1a139863c90dc1fbdbc3036256e913
SHA1

136ced5acf410a009f9056d2d254cf39b039a228
SHA256

0b63a547f7b13e87bbfce8d2517d7433e485e9f6355c5fd4461e3505a8120afc
SHA512

387abc25cb99b69ee5404007f4c1edac3c145c61b3730e697e7d0c4842e2f3a2cbefd7669f1ffad7fe426556d11e01df655a1e30176069e4310eb74dbc3e8373
SSDEEP

98304:TDqPoBhz1aRxcSUDk1xWa9P593R8yAVp2H:TDqPe1CxcxkuadzR8yc4H

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 (3327) 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
4752	mssecsvc.exe
4088	mssecsvc.exe
3252	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

System Location Discovery: System Language Discovery 1 TTPs 3 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

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 6 IoCs

description	pid	Process	procid_target
PID 2884 wrote to memory of 4704	2884	rundll32.exe	83
PID 2884 wrote to memory of 4704	2884	rundll32.exe	83
PID 2884 wrote to memory of 4704	2884	rundll32.exe	83
PID 4704 wrote to memory of 4752	4704	rundll32.exe	84
PID 4704 wrote to memory of 4752	4704	rundll32.exe	84
PID 4704 wrote to memory of 4752	4704	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ef1a139863c90dc1fbdbc3036256e913.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2884
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ef1a139863c90dc1fbdbc3036256e913.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4704
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4752
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3252

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:4088

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
5eebe844531d50a5d01dba3fbd3d50c5

SHA1
538f21abaf8548a6ac79fdd5d73e3b2d7324df38

SHA256
7da48d207d5f874159e2b8949b08c721cdeca402ec7dadd1680495ec606a83e9

SHA512
5e3cd0ecf4b4452da5de41eb0a8aec9371c36511f541569436bcc96d4988cdef409ed19e834d16a059a539c2e0cd75a594245d95442dc6762884eaf04030ab3a

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
02de29eea7bd9c1b72072e6d56972d02

SHA1
608b9806718ab51e256f88ee933e1508b595cec5

SHA256
9b342e607deb452aa94ff3bfdca464a299caa148b13799d3e944061476e11763

SHA512
593890db89d9c0086428385c4cce7baab1d09eb32e566ac35f75561cde9c1ff00d0ed0acdc03c8431de4ad3ac360dfa80d9bb5faefe0fbbf7c458ee7b5e66be7

Download Submit