wannacry | 2225462661583a82237c6a78755623b47f32fc41a2467da7c5988ce2bd8a8795

General

Target
2225462661583a82237c6a78755623b47f32fc41a2467da7c5988ce2bd8a8795.dll
Size 5.0MB
Sample261002-ghd2rssvev
SHA256 2225462661583a82237c6a78755623b47f32fc41a2467da7c5988ce2bd8a8795
MD5 4d8bd329ab433bbfe2f41fc7a0bc60d5
SHA1 8182efed59317c8eb57528c273fbe532252cbe51
SHA512 e40965b7dd6857a414f9897e647455c9b6d37249a2e0ba9a50583b77252efa1f7c133860186c5277f4386188bbc95baa014256c4209c7caf33329dc4a0c419fb
SSDEEP 98304:+DqPo41aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqP11Cxcxk3ZAEUadzR8yc4H
TLSH
T181363354A26CA2BCF0510D7440A38A7EB7B37C69DBBA9F1F47C4866A0D53B4B5BD0B01
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Family: Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3317) 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
2768	mssecsvc.exe
5808	mssecsvc.exe
4060	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

Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	mssecsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	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 2 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 5280	1668	rundll32.exe	89
PID 5280 wrote to memory of 2768	5280	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2225462661583a82237c6a78755623b47f32fc41a2467da7c5988ce2bd8a8795.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\2225462661583a82237c6a78755623b47f32fc41a2467da7c5988ce2bd8a8795.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5280
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Reads the TCP/IP host and domain name from the registry
    - System Location Discovery: System Language Discovery
    PID:2768
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4060

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:5808

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

2

T1046

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 1750e79d442f1ffcb652ca40b891b4b01bb217f6678a8fbc1ad3f36b99cd36e1
MD5 61b06242c025d1859dc2b6b9b44f918c
SHA1 8a10bb075ce185b584d241d3e0dc0e5985742f41
SHA512 53fd0de3a7e58c4c4088ea27aaf33190277fd740e78b3c10268ebe257d388896d7a29efb16559bca5db8918981740aad82e047bc1e1724e75e34a9d2023d3c6a
SSDEEP 98304:yDqPo41aRxcSUDk36SAEdhvxWa9P593R8yAVp2HI:yDqP11Cxcxk3ZAEUadzR8yc4HI
TLSH
T1E0063354A26CA2BCF0510D7440A38A7EB7B37C69DBBA9F1F47C4866A0D53B4B5BD0B01
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 9f5c3a89974673a019631c3fc51d554f4ba60002166cfeb20dd083fdfadfd5a8
MD5 718170570ba0d0e032d3b6566b4841cc
SHA1 5db04468d8c4237daad5855410d0ef2f7f037042
SHA512 a8883d97424cd3313ea3b58d630f06f70d0867b597b2ae5c08dd21f751412372c647acf50544f439c052e053c2d0ce28f7af4ae057995c59e37adbfd2b97032a
SSDEEP 98304:QqPo41aRxcSUDk36SAEdhvxWa9P593R8yAVp2Hj:QqP11Cxcxk3ZAEUadzR8yc4Hj
TLSH
T1B8F533A4D231B76CF1A10DB50196C5AF3B8664B5EFEB6F2A96C445AF0C80E5F4FC0581
MD5 SHA1 SHA512 SSDEEP TLSH