wannacry | 07312415c3c0a1b91f29f67578391a9266186bbce27906d2b50f7a10b4e253d7

General

Target
07312415c3c0a1b91f29f67578391a9266186bbce27906d2b50f7a10b4e253d7.dll
Size 5.0MB
Sample261111-cl577sdt4r
SHA256 07312415c3c0a1b91f29f67578391a9266186bbce27906d2b50f7a10b4e253d7
MD5 caadeb16b8e661662bc27d97ccefe37c
SHA1 faaa435a914ad723582c399ba33d910f2e1151b7
SHA512 8059e2200da78ecd063913ce9d971833fdf31b7f17ab5ceb5d328fee4a772e2c8e1464ea36c407e0209393c951a48112968f9a955823d9983f75f65f261846e1
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9jlA:+DqPoBhz1aRxcSUDk36SAEdhvxWa9j2
TLSH
T1CE363368726CE1FCE1050DB804A78957B2B37C6A67FD5A0F9F808A670D13B19EFD4642
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 (3340) 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
5088	mssecsvc.exe
3492	mssecsvc.exe
2232	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
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 3872 wrote to memory of 4196	3872	rundll32.exe	89
PID 4196 wrote to memory of 5088	4196	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\07312415c3c0a1b91f29f67578391a9266186bbce27906d2b50f7a10b4e253d7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3872
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\07312415c3c0a1b91f29f67578391a9266186bbce27906d2b50f7a10b4e253d7.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4196
- - 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:5088
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2232

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:3492

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

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Downloads

mssecsvc.exe

Path C:\WINDOWS\mssecsvc.exe
Size 3.6MB
SHA256 c13038052bad472b3f35b3b191675b9f57c86bf0baa34cd1fc0f6b3bef9a94b1
MD5 d733b1d60eda2c189c3328a13e393fe7
SHA1 ce1c322a58fe81756fc32ddad9f5ac8b6a3f50d5
SHA512 de43da878e3ef976abd1383e4d7f0a4096337241f6eb19083841da5a4963aff2a5eaacf3bfa4a74d37396cff663fe0ab4f1e04813e95f155b4351f88626ab43b
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9jlA:yDqPoBhz1aRxcSUDk36SAEdhvxWa9j2
TLSH
T19F063368726CE1FCE1050DB804A78957F2B37C6A67F95A0F9F808A670D13B19EFD4642
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 6873519a49ae016c30553f440c1ebf8c2fce2e5e36b69231af063bedb11a600a
MD5 a3180d0941751a130fe102dc1bd63f0a
SHA1 43e1b13be206b41e666ed083a4f9c1b6a7861792
SHA512 f19ae6677688f475353a80d889863a19fa822e074d29db828674966ae5c0fe876ebab67372c798d8bddfcb71826489c00c3769d03d7aaf95c4d7fe247522fb7e
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9jlA:QqPoBhz1aRxcSUDk36SAEdhvxWa9j2
TLSH
T16FF533A8B131B7ACF3461DFD04AAC597769634A6BADE2F16DF8005A71C41E2ECFC0185
MD5 SHA1 SHA512 SSDEEP TLSH