wannacry | 40c655fb966dcb8e039bf1dcd66f2ba2aee68c072006c9ea1aab92d036bb2cb1

General

Target
40c655fb966dcb8e039bf1dcd66f2ba2aee68c072006c9ea1aab92d036bb2cb1.dll
Size 5.0MB
Sample261002-glms3ssxhs
SHA256 40c655fb966dcb8e039bf1dcd66f2ba2aee68c072006c9ea1aab92d036bb2cb1
MD5 45d3d09e4095a1b59a69051a4db3940c
SHA1 f51f95e345d77be5759f1cae7ada07b916a45c37
SHA512 68eba87ce9c77d17222f6cf036f4b0fbdf8efbe4b0ac2a8f5a9bfa6f1f303513468753d85fafa31b8fa901487b3011033e10bc157622cde0efa20d06e288384e
SSDEEP 49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HnnvxJM0H9S:TDqPoBhz1aRxcSUDnvxWa9S
TLSH
T18736AE481F4C8E6BC18F1133196C0944BF16FAA17F7FA21AA66426E0AF5B3E91F11747
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 (3309) 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
3196	mssecsvc.exe
5552	mssecsvc.exe
3492	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\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
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 3896	4328	rundll32.exe	89
PID 3896 wrote to memory of 3196	3896	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\40c655fb966dcb8e039bf1dcd66f2ba2aee68c072006c9ea1aab92d036bb2cb1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4328
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\40c655fb966dcb8e039bf1dcd66f2ba2aee68c072006c9ea1aab92d036bb2cb1.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3896
- - 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:3196
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3492

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:5552

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 f0064a96c0fe5d081bb6b96e6052a42f9e77ef2168a5603fe7570042d98b2039
MD5 ee8961ec43e52cab8139e7157be9079d
SHA1 806ab3ad29ebb3dcba8a8c80105f0e0f3fb79d14
SHA512 3510f1d600d9070e78a67583d88cafc057176f4d75197fc1230830f922185d75c04398b643a729b6a59eec58830cdd651fe81c8fa4ef34fec4fc0ec12f186cd8
SSDEEP 49152:XnAQqMSPbcBVQej/1INRx+TSqTdX1HnnvxJM0H9SI:XDqPoBhz1aRxcSUDnvxWa9SI
TLSH
T1B806AE481F4C8E6BC18F1133196C0944BF16FAA17F7FA21AA66426E0AF5B3E91F11747
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 a974911815d4e49acc10d9d20795ca5e0de0985a9777928f8afca6100e2b1fa7
MD5 b63707612142a04e248036a52942a5df
SHA1 ee13ca188e75cf950726f2e03a5839d1e103cfeb
SHA512 15ce135035ad157db6dbd3d2186af34b1a5df6989baffbb6138036dd3981d34869014a93962b1d707b5f5a02375fa283d6f60ee6f93baec2a7099be8bab64752
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HnnvxJM0H9Sj:QqPoBhz1aRxcSUDnvxWa9Sj
TLSH
T19FF5AE481F4C8E6BC18F113319AC0944BF06FAB17F7FA25AA66421D0AF9A7E91F11747
MD5 SHA1 SHA512 SSDEEP TLSH