wannacry | e9e8fa0e2ebf221bb07eb40cf7c9d408bd67b4ad92dbfb3efa7245bb0f763eed

General

Target
e9e8fa0e2ebf221bb07eb40cf7c9d408bd67b4ad92dbfb3efa7245bb0f763eed.dll
Size 5.0MB
Sample261027-eaxsssbs4k
SHA256 e9e8fa0e2ebf221bb07eb40cf7c9d408bd67b4ad92dbfb3efa7245bb0f763eed
MD5 b5898d55f8e279453474f57470538dc3
SHA1 ef143edce0f87e195a4da410921e5cc9b34a9c8a
SHA512 0f75445d62828b686f8bb0c3549f513ccdc1b59266e6278bba7207394adb7b9c0310577e55eba9a8d14b44b38ef3215cb19c315308b37198a8a9f0d12f891d0e
SSDEEP 49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhhPAMEc:TDqPoBhz1aRxcSUDk36SAEdhhP5
TLSH
T14236CF00E1E41A60E6F25EF626BACB10477ABE46995B9A5E1221504F0C73F1CDDE2F3D
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 (3364) 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
1384	mssecsvc.exe
2420	mssecsvc.exe
2360	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 700 wrote to memory of 1132	700	rundll32.exe	89
PID 1132 wrote to memory of 1384	1132	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9e8fa0e2ebf221bb07eb40cf7c9d408bd67b4ad92dbfb3efa7245bb0f763eed.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:700
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9e8fa0e2ebf221bb07eb40cf7c9d408bd67b4ad92dbfb3efa7245bb0f763eed.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1132
- - 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:1384
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2360

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:2420

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 8c698411ef4df07eefe047af4048eb03b1eeb88297e3e91e260a5ce92c36a24b
MD5 1966eabd9a93b138e9084395363e5202
SHA1 d7ea2ca4e999e60445be660dbaa0c6745452fd89
SHA512 ff0b8163ac4f6703128169839584ed8fc22c1b43d553cd8de2465d17aaf7e75cbdf2aeaeef15252f23e3eaabe140338589e3d90de4a1dad290be799e268b773a
SSDEEP 49152:XnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhhPAMEc:XDqPoBhz1aRxcSUDk36SAEdhhP5
TLSH
T1D206CF00E1E41A60E6F25EF626BACB10477ABE46995B9A5E1221504F0C73F1CDDE2F3D
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 a0e095ad4ca2794093439a08b59d0bc401905822d7b5c0048747c2f525749840
MD5 6dcbdc5eddbefff0e7411dc7a111f6bd
SHA1 f26a480957e8c1146c517ee78b4096dcea9c5927
SHA512 ca6f2b23c098217f41de70da0314e93b373974d3293ef5530c75c91db2f5c288e7f368e3123322cfd1cadfdeda63aed9a3cbf6709cbc792f7afcee83e702d65b
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhhPAMEc:QqPoBhz1aRxcSUDk36SAEdhhP5
TLSH
T1ADF5CE10D1E42B60E6F21EF626BADB104779BE46995B9A5E1221504F0C73F1CCEE2F2D
MD5 SHA1 SHA512 SSDEEP TLSH