wannacry | 8b50905e0f9bca990e98591b65c0d5888fa97d2ce2d77de9e0f94b743f7788e9

General

Target

9bab2772b135101fc9654c60aa92672f_JaffaCakes118.dll
Size

5.0MB
MD5

9bab2772b135101fc9654c60aa92672f
SHA1

1c81324adddad69e2ece4b078c034f43d25b3f72
SHA256

8b50905e0f9bca990e98591b65c0d5888fa97d2ce2d77de9e0f94b743f7788e9
SHA512

197efe33eec545a5a77fe251e7f5bee38b61b32f2c472c89fdc13a808df5d6315583aa2cc77509a9213ffbd602bb162254b0f50272cd5d8c005188e5cf63e591
SSDEEP

24576:SbLgddQhfd5EqxjK/smNmbVio4P7FBSaoBxF9:SnAQaqxNmsbVbK

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3077) 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
1812	mssecsvc.exe
620	mssecsvc.exe
2472	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
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 = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-72-35-e6-83-b7\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	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\{D8C1C853-F87A-4376-B4B5-2088D5425D64}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D8C1C853-F87A-4376-B4B5-2088D5425D64}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D8C1C853-F87A-4376-B4B5-2088D5425D64}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D8C1C853-F87A-4376-B4B5-2088D5425D64}\7a-72-35-e6-83-b7	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-72-35-e6-83-b7\WpadDecisionTime = 008fc9c259efda01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-72-35-e6-83-b7\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\ZoneMap\	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D8C1C853-F87A-4376-B4B5-2088D5425D64}\WpadDecisionTime = 008fc9c259efda01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\7a-72-35-e6-83-b7	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{D8C1C853-F87A-4376-B4B5-2088D5425D64}\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 1324 wrote to memory of 2316	1324	rundll32.exe	29
PID 2316 wrote to memory of 1812	2316	rundll32.exe	30
PID 2316 wrote to memory of 1812	2316	rundll32.exe	30
PID 2316 wrote to memory of 1812	2316	rundll32.exe	30
PID 2316 wrote to memory of 1812	2316	rundll32.exe	30

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9bab2772b135101fc9654c60aa92672f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\9bab2772b135101fc9654c60aa92672f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2316
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1812
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2472

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:620

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
0625e433394e53b3eb468b6eda86d6dd

SHA1
f384f5067dc01c9b901ea5a93c4c7eb1a76c141e

SHA256
4b3ee67016e4a80ba92c0854ee0f79c61a887a0de5d856154a7ad96f1b366c19

SHA512
f157b1e12555aa32b21619351557ac6d9c57483883d49a61703c87e5264d22f05e22607b6c33587b6d1a1968455d7ebf16d812eda3e3c18aa5de765557a3aca0

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a066cd0b679bcfd8f87cce7c69783b28

SHA1
a91a02afe0d29d869e4dd3a8cb6b7f90095d65f6

SHA256
9dc2cfb54d2231c62e8ba24cf1a85e3f31a0732410ea8f6916791226285e2b8f

SHA512
e61ba0235d62b64390bcf228caedc420da52e99f6f8dd2bdece8640c0a54bffd048b7d41ec8b1ce523b027026b5fc4cd44a7e9b811dc44d7b6536374544b3889

Download Submit

Analysis

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