wannacry | 3ea202bbee35810d69a1ce53423d3ee386e7895a6be1befdcfd6a8274a51ef79

General

Target

be9bdee97e6142aeb032bda086b983f7_JaffaCakes118.dll
Size

5.0MB
MD5

be9bdee97e6142aeb032bda086b983f7
SHA1

caacfc64688347238751ca28d3ce6a32c764dd7a
SHA256

3ea202bbee35810d69a1ce53423d3ee386e7895a6be1befdcfd6a8274a51ef79
SHA512

e6c41033bf979707c55b617aba58576e956e308d6c81c0b1690b7a4823672c7c6b770ee2764e6c0a639f40e66c1fa6acfdd27d9b0211e5b3cb762e4235727999
SSDEEP

12288:T1bLgmluCtgQhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+D:RbLgurgQhfdmMSirYbcMNgef0

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3226) 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 2 IoCs

pid	Process
3380	mssecsvr.exe
4800	mssecsvr.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 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe

Modifies data under HKEY_USERS 15 IoCs

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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 464 wrote to memory of 2540	464	rundll32.exe	86
PID 464 wrote to memory of 2540	464	rundll32.exe	86
PID 464 wrote to memory of 2540	464	rundll32.exe	86
PID 2540 wrote to memory of 3380	2540	rundll32.exe	88
PID 2540 wrote to memory of 3380	2540	rundll32.exe	88
PID 2540 wrote to memory of 3380	2540	rundll32.exe	88

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\be9bdee97e6142aeb032bda086b983f7_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:464
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\be9bdee97e6142aeb032bda086b983f7_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3380

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4800

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\mssecsvr.exe

Filesize
2.2MB

MD5
1b2d2a470524fb1443ddce9565ff2735

SHA1
8fc43721ff5b0c24655161bd33d71c385d5885ab

SHA256
fc72367dc4593e00aac925bf1e930f20ce583df6a664f6a8ab06f465c4515372

SHA512
dac27097f02679c04c726c2b6cb2b78b658fbfcad318c1289d3d033172fb6bd831579c1ef456d1715a9d8c18ce0dce6a7e81f2b170360be8020f5530cec3af4e

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