wannacry | 5c2ef1f4187594e8141c6089d2e2fc2b3ca86060afb7210d65a2d241bf53c5f5

General

Target
5c2ef1f4187594e8141c6089d2e2fc2b3ca86060afb7210d65a2d241bf53c5f5.dll
Size 5.0MB
Sample261102-c5n32a119j
SHA256 5c2ef1f4187594e8141c6089d2e2fc2b3ca86060afb7210d65a2d241bf53c5f5
MD5 86d347a1d5013042c5585c95da316a46
SHA1 33927f28b84faf64eee1a835a1e57994d367c82b
SHA512 8a845e46585917429880a072464e47d26f22665b10331bf94d5c00e5b2d2dc24dcb3e6da683c43dc3fc1f6b252ace9548d389338a43fc47d01a62d7f4eac34ca
SSDEEP 12288:T1bLgmluCti62gaIMu7LocQhfYNvrTcbckPU82900Ve7zw+K+DH:RbLguriXd5cQdIvrYbcMNgef0Q
TLSH
T17736134536ACC0F5C127527094BB8A21F5B67C2E63B9560FBB904B6E3D23790AB21F53
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 (3366) 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
3932	mssecsvr.exe
4532	mssecsvr.exe
3812	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\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3480	3812	WerFault.exe	93

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\Domain	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	mssecsvr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	mssecsvr.exe

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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.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"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5028 wrote to memory of 3196	5028	rundll32.exe	89
PID 3196 wrote to memory of 3932	3196	rundll32.exe	90
PID 3932 wrote to memory of 3812	3932	mssecsvr.exe	93

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c2ef1f4187594e8141c6089d2e2fc2b3ca86060afb7210d65a2d241bf53c5f5.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\5c2ef1f4187594e8141c6089d2e2fc2b3ca86060afb7210d65a2d241bf53c5f5.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3196
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.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
    - Suspicious use of WriteProcessMemory
    PID:3932
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:3812
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3812 -s 544
        5⤵
        Program crash
        
        PID:3480

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.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:4532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 392 -p 3812 -ip 3812
1⤵
PID:4828

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

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 2.2MB
SHA256 06d5041694ce9aedcdf211614a002e3a32dc6bdbe447cc4a7ecb0691ee8f9cec
MD5 16416b726eaf59a850504c6a86bbf7d6
SHA1 be0ddca7bee3799c781ee66a3b600fd3c3d9c1a9
SHA512 0f5aec6f108db7e41a922e732c9ec78a8dbd1ce13573e91ff8c1ee0672a3cd802d57119a9ab5a27dbd0033f3fbedabbb1578f0139533fd7f58a7758cb60c1f0e
SSDEEP 12288:e1bLgmluCti62gaIMu7LocQhfYNvrTcbckPU82900Ve7zw+K+DH:QbLguriXd5cQdIvrYbcMNgef0Q
TLSH
T1C5B5134536ACC0F5C127527094FA8A21F5B67C2E63B9560FBBA04B6E3D23790A721F53
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 0be7267f4b2683c914af2cb7a14aa4f4cef9ad1e883c9c86b7afe15ff0a5675e
MD5 0af4201d63605b3dcb17ade8a9396111
SHA1 b078c8390615161ad4ab047c614f4534a68d53c2
SHA512 8ff85e40a8244a395a1f6fb84930aff16dae40aa97ef5d0ac15487deb5a9701908d8e7268a72b2eb33dc45bf74d44a3fe02927d96d6919223f842fa01b8ebb14
SSDEEP 12288:nti62gaIMu7LocQhfYNvrTcbckPU82900Ve7zw+K+DH:tiXd5cQdIvrYbcMNgef0Q
TLSH
T18195129536A0D2BBC737557094ECC652B4B5707AA3DA260BFBE0075E7C15BA08B02FD2
MD5 SHA1 SHA512 SSDEEP TLSH