wannacry | 8901ec63265401b24d143fbea067a2d4b0e4cda2e95be3f6c69e7c7fefea8e44

General

Target

ee5ebc67e4c18332cebc69eba65393d7.dll
Size

5.0MB
MD5

ee5ebc67e4c18332cebc69eba65393d7
SHA1

1d80cf253d7410e990735170f46e5bef5ea88ef6
SHA256

8901ec63265401b24d143fbea067a2d4b0e4cda2e95be3f6c69e7c7fefea8e44
SHA512

6533b1db51cf3b012acf3938085c4e17953235e9ff21d2752a7ca5ee3f94943b3bc3c2cf6387a825ace153f21a353edc7ad2fb6cb377d150c58e8bcfa84fd64a
SSDEEP

6144:yE9l9yNqIYVTH5DgSg8ajldktM0XXrsS3s2VR:ywbLgPluao

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3277) 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
1960	mssecsvc.exe
1884	mssecsvc.exe
492	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 System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2988	492	WerFault.exe	33

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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies data under HKEY_USERS 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 3016 wrote to memory of 2544	3016	rundll32.exe	30
PID 2544 wrote to memory of 1960	2544	rundll32.exe	31
PID 2544 wrote to memory of 1960	2544	rundll32.exe	31
PID 2544 wrote to memory of 1960	2544	rundll32.exe	31
PID 2544 wrote to memory of 1960	2544	rundll32.exe	31
PID 1960 wrote to memory of 492	1960	mssecsvc.exe	33
PID 1960 wrote to memory of 492	1960	mssecsvc.exe	33
PID 1960 wrote to memory of 492	1960	mssecsvc.exe	33
PID 1960 wrote to memory of 492	1960	mssecsvc.exe	33
PID 492 wrote to memory of 2988	492	tasksche.exe	34
PID 492 wrote to memory of 2988	492	tasksche.exe	34
PID 492 wrote to memory of 2988	492	tasksche.exe	34
PID 492 wrote to memory of 2988	492	tasksche.exe	34

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ee5ebc67e4c18332cebc69eba65393d7.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ee5ebc67e4c18332cebc69eba65393d7.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1960
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:492
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 492 -s 36
        5⤵
        Program crash
        
        PID:2988

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:1884

Network

MITRE ATT&CK Enterprise v15

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
0c265783db1acf4cac88e341e3abd80f

SHA1
3a0a0d88de5c988965418c6630858682529f082b

SHA256
565b92a82a8a9435af47dc81178d1d1288b37f512e108c11abe5c87e292c3365

SHA512
584e54633542125bb2095310179d2a2ee90142b3ed51a251c65eb41359522b1f2759c62edb52c40e1b9afd045e01962b3a99ce993a6705b22b970fdd078bc0fe

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a26310650582a1acd904aa135494287b

SHA1
c8233152f46901a4728b422db7a8e1ca018f9011

SHA256
49e51b5389b6f83627e74db08533eb0e6876bbc7391638f581877ababb7438b9

SHA512
39f070b34f7b43d685f2b094876613fe2d0ae61b183b665b7db041d6eece4faa699494212f44f6123a916d0318e598c8dea56bad4ea1afda7e56d9e08a2c4154

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Analysis

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