wannacry | e4d1339b125841c9c7fdcf6f48055e35be140aeadc115fa77f544213521dadb3

General

Target

f090db981f4ed763717b44601a8d88bd_JaffaCakes118.dll
Size

5.0MB
MD5

f090db981f4ed763717b44601a8d88bd
SHA1

edb0ab49c8738105f4b5f6561fe07d2c800a4634
SHA256

e4d1339b125841c9c7fdcf6f48055e35be140aeadc115fa77f544213521dadb3
SHA512

7e41afb053598bd44cfe9e5e7a6ca54bf07f9727b9807c83ebf9c11d2a77796c06a348070e28e491e4c56c49209e17cf1947c79f47194e9c22202695ed552780
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SA5vxJM0H9PAMEcaEau3:+DqPoBhz1aRxcSUDk36SARxWa9P593

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3318) 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
2376	mssecsvc.exe
2420	mssecsvc.exe
2840	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

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 24 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{4293FF0F-0CAD-4D9F-A450-CB251F22B9F3}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{4293FF0F-0CAD-4D9F-A450-CB251F22B9F3}\WpadDecisionTime = 901e32f8650cdb01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f2-ee-23-51-c7-65	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{4293FF0F-0CAD-4D9F-A450-CB251F22B9F3}\f2-ee-23-51-c7-65	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f2-ee-23-51-c7-65\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f012b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{4293FF0F-0CAD-4D9F-A450-CB251F22B9F3}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{4293FF0F-0CAD-4D9F-A450-CB251F22B9F3}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{4293FF0F-0CAD-4D9F-A450-CB251F22B9F3}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f2-ee-23-51-c7-65\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\f2-ee-23-51-c7-65\WpadDecisionTime = 901e32f8650cdb01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 1744 wrote to memory of 2576	1744	rundll32.exe	29
PID 2576 wrote to memory of 2376	2576	rundll32.exe	30
PID 2576 wrote to memory of 2376	2576	rundll32.exe	30
PID 2576 wrote to memory of 2376	2576	rundll32.exe	30
PID 2576 wrote to memory of 2376	2576	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f090db981f4ed763717b44601a8d88bd_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1744
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f090db981f4ed763717b44601a8d88bd_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2376
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2840

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:2420

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

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
3a93a6291faa2c91b13b8ee496d264a4

SHA1
af9667ab4214f5863afbebe8e6e083f988190abe

SHA256
c10d32b7876a8a1efd1659ed9efa3792286d4a2f4f17d15869e53ca11be5f01c

SHA512
929f27efdda04b846ad07dfdee83e120c87da7a130ee430936cd8591563a93d1f7968b357248add5a26afc7c957edf962397c03a94d1452952542de19a622afd

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
24ea55f5dcf1c9cce03cc88a0530aec2

SHA1
051d2570be61c1f92a17765e28a31399e10faf39

SHA256
b996d002b6edde5989b612bcc415d2116ed0a80d04c427db0a49331ea5e04c1b

SHA512
304e3d4e1f7ce53199aefdf7c79ca23aaaf0ecc32b910884959d8f8b6fb5f5b33d22e49fc6ac0588911cfeb49c5d6e9dd1a10ec113b1ed9d70e9af531960834f

Download Submit

Analysis

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