wannacry | bc1190d376de9ae22138d00199970385ff23cfe466552c37cc426c55354035fd

General

Target
bc1190d376de9ae22138d00199970385ff23cfe466552c37cc426c55354035fd.dll
Size 5.0MB
Sample261027-chh89scd95
SHA256 bc1190d376de9ae22138d00199970385ff23cfe466552c37cc426c55354035fd
MD5 323bdbafbe51f8aa30d768498732dec7
SHA1 8ae1eff8e378575c4d31a5a69dadfc33bb694cad
SHA512 7ce93e02df2ed6a032d3ef056545a59642131ead62fb1eef17ffe476a0cc2bb355f2bc4bf30c2de57b59f91caf3523b6a89fcdffb57b28f5b98c3469f634d124
SSDEEP 49152:SnscSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvSlAH:+sfoBhz1aRxcSUDk36SAEdhvS2H
TLSH
T15536236530A8C0B4D107197444EBCB62F6B6BC2917B6694FBFC04B7E2E63B92E714742
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 (3358) 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
3400	mssecsvc.exe
4872	mssecsvc.exe
3736	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1324 wrote to memory of 4460	1324	rundll32.exe	88
PID 4460 wrote to memory of 3400	4460	rundll32.exe	89

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\bc1190d376de9ae22138d00199970385ff23cfe466552c37cc426c55354035fd.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\bc1190d376de9ae22138d00199970385ff23cfe466552c37cc426c55354035fd.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4460
- - 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:3400
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3736

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:4872

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

Replay Monitor

Loading Replay Monitor...

Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 fa0a7f0a9d11834acf3dad73e978b11f5e42e7ef423acbb17120a6fce7c8f447
MD5 4b0c682bd7a2def8ec8d49d240931979
SHA1 fd24ba01d6bbbeafd78b8408fa0896cfb98b0c92
SHA512 1c7e8afee63cbb30a66ecb80c7e64e8edf2b6c75a1eb4c8d4dd280e6aa745528297e6858f9647b6252f31a4a62f356e8d74691c71b7e92c2c2cc5be577b5d824
SSDEEP 49152:2nscSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvSlAHI:ysfoBhz1aRxcSUDk36SAEdhvS2HI
TLSH
T12306236530A8C0B4D107197444EBCB62F6B6BC2927B6694FBFC04B7E2E63B91E714742
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 fbe779d70fc505dd260dbff698e62eeb32e9ffed20f50b2505cb6963bf3a09f1
MD5 51d82a9e8de793bbac61aa001ad7d8f9
SHA1 11b684a3695ca7f7f31bd6c35243e03cee6de5a2
SHA512 a6fabdfb0e9c768e3f2b5dae420b01fbe62dc2fee7b42a5f22b735d1bdcfb1e6d3bac68c55f484bf52eed4c48c557a427541263d22bcb2ec44723c274e837a77
SSDEEP 49152:XcSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvm:XfoBhz1aRxcSUDk36SAEdhvm
TLSH
T1B39523B570A1D075D207187444EACA63B5A5B4362BEB3D4BFFC00E7E7A61BA6D301782
MD5 SHA1 SHA512 SSDEEP TLSH