wannacry | a714a1e87c850cd0864d2431e53568428a7a3915435155b7c78d20499faf1b07

General

Target

a714a1e87c850cd0864d2431e53568428a7a3915435155b7c78d20499faf1b07.dll
Size

5.0MB
MD5

d803c7cba05b2e7386a568cfc39c801b
SHA1

b4a0e6c169db08800a3e146b0e6a1097d873ce41
SHA256

a714a1e87c850cd0864d2431e53568428a7a3915435155b7c78d20499faf1b07
SHA512

9b12c9f38217ea2dfbae1ca053b3dd2f94eaddf03984f3d6416924dfd14689066fc54ecca8b3ffd5d40733b95df62b6725905156f6bea675a7b22f4ca0deafdb
SSDEEP

98304:+DqPoBhz1aRxcSUZk36SAEdhvxWa9P5uR8yAVp2H:+DqPe1Cxc7k3ZAEUadgR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2910) 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
2192	mssecsvc.exe
2668	mssecsvc.exe
2508	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

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16\WpadDecisionTime = 109382adbaccda01	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 = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	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\History\CachePrefix = "Visited:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0107000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\12-e8-0c-d8-7f-16	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\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadNetworkName = "Network 3"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	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\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadDecisionTime = 109382adbaccda01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{39FFD7B2-9DA2-4408-9725-386077F80865}\WpadDecision = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-e8-0c-d8-7f-16\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2972 wrote to memory of 2284	2972	rundll32.exe	28
PID 2284 wrote to memory of 2192	2284	rundll32.exe	29
PID 2284 wrote to memory of 2192	2284	rundll32.exe	29
PID 2284 wrote to memory of 2192	2284	rundll32.exe	29
PID 2284 wrote to memory of 2192	2284	rundll32.exe	29

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a714a1e87c850cd0864d2431e53568428a7a3915435155b7c78d20499faf1b07.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a714a1e87c850cd0864d2431e53568428a7a3915435155b7c78d20499faf1b07.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2284
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2192
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2508

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2668

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
2d288b8ed899ea8ba566a96588a1c94a

SHA1
afa28d780575f8818d6d509325ad2388de23c4ac

SHA256
fbc3ab490d28d7a6e4127c7bdb5297f33cf4bef3d2332df40d582ec3a3836269

SHA512
07ebd0f0051211c9ab34c8eef9ddd9387ddc45de52598e871f34860386c5f9c8917b4996bf32e5e061395199fd58807615a0686e7b5044d57ae0fb2a52aa2694

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
db907ac4209f3d5f7e04a4eec7c684ef

SHA1
1b282679e203159340fc5c4553095e1718f581dd

SHA256
02be61c18e061e7b410f76a3685b5e18c13f506fc7b136f75413c45171d1f8d7

SHA512
5bedd41a11ff739260bbd0553e55d365109733df1a722cfd8284e71abe8a347a04d0f282e1593711b79168773712fe8b5b0c66baa7eb0a480a09084577945531

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Analysis

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