wannacry | eb0482a9de2f68aa565c0b30d51b75189f8d2fa881b0b5be47383825b6e8269f

General

Target

3dd20421f9a536cfdd3a8b5cf7e5d5fc.dll
Size

5.0MB
MD5

3dd20421f9a536cfdd3a8b5cf7e5d5fc
SHA1

9ad38539be5836e2ec27621c32a66670293d52ff
SHA256

eb0482a9de2f68aa565c0b30d51b75189f8d2fa881b0b5be47383825b6e8269f
SHA512

68662b14f282597a4ea6960734f82c9e9596c0b486766ffaec528df8d9e48ba009f8406b5254b09fad42cecbdcd54620fbf8f9c504575d9587acc47dc68c2b19
SSDEEP

6144:TE9l9ynRIYVTH5DgSgNajldktM0XXrCI:T1bLgmluC

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 (3316) 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
4948	mssecsvr.exe
4684	mssecsvr.exe
64	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 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	mssecsvr.exe

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 2 IoCs

pid	pid_target	Process	procid_target
1548	64	WerFault.exe	86
4084	64	WerFault.exe	86

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 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	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\IntranetName = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\UNCAsIntranet = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	mssecsvr.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2556 wrote to memory of 4272	2556	rundll32.exe	83
PID 2556 wrote to memory of 4272	2556	rundll32.exe	83
PID 2556 wrote to memory of 4272	2556	rundll32.exe	83
PID 4272 wrote to memory of 4948	4272	rundll32.exe	84
PID 4272 wrote to memory of 4948	4272	rundll32.exe	84
PID 4272 wrote to memory of 4948	4272	rundll32.exe	84
PID 4948 wrote to memory of 64	4948	mssecsvr.exe	86
PID 4948 wrote to memory of 64	4948	mssecsvr.exe	86
PID 4948 wrote to memory of 64	4948	mssecsvr.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3dd20421f9a536cfdd3a8b5cf7e5d5fc.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2556
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3dd20421f9a536cfdd3a8b5cf7e5d5fc.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4272
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4948
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:64
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 64 -s 216
        5⤵
        Program crash
        
        PID:1548
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 64 -s 240
        5⤵
        Program crash
        
        PID:4084

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4684

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 64 -ip 64
1⤵
PID:4136

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 64 -ip 64
1⤵
PID:5056

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\mssecsvr.exe

Filesize
2.2MB

MD5
0f00dc99f94fdca3721d0692b2acaccd

SHA1
26752440d553be37c7588de14da1e2d253afa30e

SHA256
940ebd46d1808462b4ae583cf720070bb2bc59c4dcbf67dd1e63dde9c9f4dd4f

SHA512
1f851707ac2cce5d5617b36ffdae264a64aa71ad96680b1f3e55b307e39680843436b9f60ff3cbdb0d1df140780f583218eac88f406f0bba65112e57b6c04745

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C:\Windows\tasksche.exe

Filesize
2.0MB

MD5
e2105f086eab75bd8cdd2b6975e9ce80

SHA1
abe19d68404b538ca524638af77652992bc20d37

SHA256
8c00cfb2696856f4c7e917dbf8b496d40b63d3f498ec51811730be2e34d91c7f

SHA512
aa1098141e5b47b0639e1863e253bbbdee31fbd2b2624990d89f447161c6ee69bfce9baeefce8ccf0a474cfc67c57343847145ae87e1fa01721134814f36a7db

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Analysis

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