wannacry | dd03724c30124dec96b83084b0661cebe5383270b756e92d00a8199b640b029d

General

Target
dd03724c30124dec96b83084b0661cebe5383270b756e92d00a8199b640b029d.dll
Size 5.0MB
Sample261027-dnwbfsa13j
SHA256 dd03724c30124dec96b83084b0661cebe5383270b756e92d00a8199b640b029d
MD5 e39e42198814d99b26436126803ff05a
SHA1 a7f83dfef397b6eb379c98d36f78c84cf24be361
SHA512 34f81d767e1f7ccc7e856fd6a26026fa8bb6aa64e151eb91a9eef3f42824742f8899790251877b7de3f666ff7c187e529fccf5775961dbe005f4ce173e0d55e9
SSDEEP 49152:SnAQqMSPbcBV6RdhnvxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBUdhvxWa9P593R8yAVp2H
TLSH
T117363390671C61BCF0A90AB45023492DB7777D29A77A872F87D0C7660C53B93BEE4B06
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 (3362) 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
6076	mssecsvc.exe
4016	mssecsvc.exe
5928	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\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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 6028 wrote to memory of 5104	6028	rundll32.exe	89
PID 5104 wrote to memory of 6076	5104	rundll32.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dd03724c30124dec96b83084b0661cebe5383270b756e92d00a8199b640b029d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:6028
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dd03724c30124dec96b83084b0661cebe5383270b756e92d00a8199b640b029d.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5104
- - 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:6076
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5928

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:4016

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 90b2db8c878a35118db1d1493e9af98244bbc7b5c1b4c1e3c775ac1f89bf0bc0
MD5 6e68a0c96377369d5130016d98a87f99
SHA1 4a7b856c08775aebf819c52b972c7acc8816e901
SHA512 118e2e2304f44a468b301f574258ed38276ebcd0b4a4c3bbdfa8b24ff8d19e730814d6be4b3877f13b42133b6315b49ec96babcf4d3676fc845b21c897d2b6bc
SSDEEP 49152:2nAQqMSPbcBV6RdhnvxJM0H9PAMEcaEau3R8yAH1plAHI:yDqPoBUdhvxWa9P593R8yAVp2HI
TLSH
T12A063390671C61BCF0E90AB45023492DB7777D29A77A872F87D0C7660C53B93BAE4B06
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 4ccc3795b610a08b06f6c247c41ec21fb8a3a1387ba91944ee732e5c962a57c3
MD5 469428ed350dc219745a91564147bc13
SHA1 8974d646b64abcdcfebb8e3bfb6c6109adb27578
SHA512 9f3cfb836dba8b77d078568b08db1db0476c216a407bb0ae5afe3685c01dba16f54cdc17e79f0a36d6a6d826347a5e001341de654905ad1a3e8997dab6fe83f5
SSDEEP 49152:nQqMSPbcBV6RdhnvxJM0H9PAMEcaEau3R8yAH1plAHj:QqPoBUdhvxWa9P593R8yAVp2Hj
TLSH
T11CF533E09A11336CF2F90EF86021846E3A4B0771FAAB4B3ED2D543565C40E9B8FD46D9
MD5 SHA1 SHA512 SSDEEP TLSH