wannacry | 8fb8affd012c7c103942c3c544ca7a2e31375428bb6cd17fbd49a6be08e47103

General

Target

0ab9a60a55cb40fc338e8f4988feee2f_JaffaCakes118.dll
Size

5.0MB
MD5

0ab9a60a55cb40fc338e8f4988feee2f
SHA1

40b02f6f1d79200e8c2cca3123f08994b06cc0cf
SHA256

8fb8affd012c7c103942c3c544ca7a2e31375428bb6cd17fbd49a6be08e47103
SHA512

ccf39f7923768037e823a5f3ddfc0895bb244c35a39d5199cbcd6a830e1544c56e3aa322cf7ede0fa8332ce6925a01755c9e1606dddb308c5e6f63b855e2ae11
SSDEEP

24576:RbLguriIfEcQdIvrYbcMNgef0QeQjG/D8kIqRYoAd:RnpEjbcBVQej/1I

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3339) 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
940	mssecsvr.exe
2424	mssecsvr.exe
644	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 4 IoCs

description	ioc	Process
File created	C:\Windows\eee.exe	tasksche.exe
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_240602906	tasksche.exe

Modifies data under HKEY_USERS 15 IoCs

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

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 1384	728	rundll32.exe	80
PID 728 wrote to memory of 1384	728	rundll32.exe	80
PID 728 wrote to memory of 1384	728	rundll32.exe	80
PID 1384 wrote to memory of 940	1384	rundll32.exe	81
PID 1384 wrote to memory of 940	1384	rundll32.exe	81
PID 1384 wrote to memory of 940	1384	rundll32.exe	81
PID 940 wrote to memory of 644	940	mssecsvr.exe	83
PID 940 wrote to memory of 644	940	mssecsvr.exe	83
PID 940 wrote to memory of 644	940	mssecsvr.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ab9a60a55cb40fc338e8f4988feee2f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0ab9a60a55cb40fc338e8f4988feee2f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1384
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - Suspicious use of WriteProcessMemory
    PID:940
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      PID:644

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2424

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\tasksche.exe

Filesize
2.0MB

MD5
eb4724c29cd3801e5bd42eec4acdfbc7

SHA1
03a963f396386306988faf1fd79065356b8d951d

SHA256
d902478012c72485b63542edcfb1f6cc37b1d7f26ebf16fb2c29ed3fa50f7fc9

SHA512
180ea372a2fafbca2d55856dc57252d33a744ce274582c7f1c4aa9a27e9333c5ecc8ef895ace001f1cbc09ee03c4beef79b2537aea9b3e3f6aa0f1f722bbbad4

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C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
008fb2d2f5c1d480ffd43ef2fa6d4f72

SHA1
af3a66bfa2cda83a0f4acefd964fa11b7ec5e2b5

SHA256
81e753d746d1417b626231657927a446c1406d2fccb6c8d0280780d5e2f50bc7

SHA512
935953ec5481c19f6b2bb353c3094a76a855492060260ccbe8b6845dface74a9bac77babad91c21ef42f5e91aa6c84e18558e1ea0c35f44bc309bfd4924288ab

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Analysis

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