wannacry | 3bae088144ef5d7af909a7617f4b9712212099415364c6cccb432ae2313e2752

General

Target

59f69d3ccd7de0f6466ef39a95363b1b_JaffaCakes118.dll
Size

5.0MB
MD5

59f69d3ccd7de0f6466ef39a95363b1b
SHA1

f3256256b4dda2ddfefb99def8170584b44fd7cf
SHA256

3bae088144ef5d7af909a7617f4b9712212099415364c6cccb432ae2313e2752
SHA512

3eef979e6c2f4f73d13573d71a077c582270b5f719986d2a983034e967e255a8d41f1146157c151679637ee85db54f5f790ec7fabb159ae61798ec994182f0ff
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhv093R8yAVp2H:+DqPe1Cxcxk3ZAEeR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3106) 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
2704	mssecsvc.exe
2888	mssecsvc.exe
2668	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\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
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\Wpad\{452F0236-2293-4B4E-8D0D-C38F0F9F7A61}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{452F0236-2293-4B4E-8D0D-C38F0F9F7A61}\WpadDecisionTime = 70e1442c7dd9da01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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\Wpad\{452F0236-2293-4B4E-8D0D-C38F0F9F7A61}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{452F0236-2293-4B4E-8D0D-C38F0F9F7A61}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{452F0236-2293-4B4E-8D0D-C38F0F9F7A61}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-43-22-e8-e9-4a	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-43-22-e8-e9-4a\WpadDecisionReason = "1"	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\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0196000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-43-22-e8-e9-4a\WpadDecision = "0"	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\Wpad\{452F0236-2293-4B4E-8D0D-C38F0F9F7A61}\9e-43-22-e8-e9-4a	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9e-43-22-e8-e9-4a\WpadDecisionTime = 70e1442c7dd9da01	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\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2900 wrote to memory of 2840	2900	rundll32.exe	30
PID 2840 wrote to memory of 2704	2840	rundll32.exe	31
PID 2840 wrote to memory of 2704	2840	rundll32.exe	31
PID 2840 wrote to memory of 2704	2840	rundll32.exe	31
PID 2840 wrote to memory of 2704	2840	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\59f69d3ccd7de0f6466ef39a95363b1b_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\59f69d3ccd7de0f6466ef39a95363b1b_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2840
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2704
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2668

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:2888

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
97bcb9e72e585dbe5b556d9ab060dc98

SHA1
b486357a493c67f32f175aa48295f859166f9f33

SHA256
800627719945fc43e5a8826316fff7f8a3576efb458a8d350f823872cd087a06

SHA512
92fa696e8abb0e2badca7905b71a4518a7ef287efb99e56676c97353ae384adf1c0612a9f0556e7f24a1d86c62b7fc8916066aad5bf644327e42bf0ba963db48

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c7c992d033371f18609081792f296cfe

SHA1
55a0e1cd9bfd29434797e58875512ce414cbb5b3

SHA256
ea2a6b50185fe0a1901232d4bff143a57648040c0287a3e7f3cd9207e44bde17

SHA512
821b53f33e0951b96c39be2d74dfdd99507b5ec45d35c6b965934a76f6fd5356ae37cfdbc2cdeedbc84853963e85dd425c9a6c7c8d45632c1689dc5c45617dd1

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Analysis

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