wannacry | c88aa6e79e17b12670cecde5e185108a64afbbab12d789e5e97d131f96332945

General

Target

c88aa6e79e17b12670cecde5e185108a64afbbab12d789e5e97d131f96332945N.dll
Size

5.0MB
MD5

916205e7bd372f0b9208f6887be238d0
SHA1

57796cce4f7bf25fe4a7d34c22584b4d5dc8b93a
SHA256

c88aa6e79e17b12670cecde5e185108a64afbbab12d789e5e97d131f96332945
SHA512

df09c1859c1f73c9e4bb1df64f2b9e9e28fb8badd8d4522f1f04a15931764e0c1a904b198cfaafb90e3ce7861a02e6dbab9936cbeb419b59b18019eddfb436e1
SSDEEP

49152:unpEjbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:apUoBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2480) 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
1420	mssecsvr.exe
1968	mssecsvr.exe
4356	tasksche.exe

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\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_240633046	tasksche.exe
File created	C:\Windows\eee.exe	tasksche.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tasksche.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\IntranetName = "1"	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\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\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\ProxyBypass = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe
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	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	mssecsvr.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 3096	2096	rundll32.exe	84
PID 2096 wrote to memory of 3096	2096	rundll32.exe	84
PID 2096 wrote to memory of 3096	2096	rundll32.exe	84
PID 3096 wrote to memory of 1420	3096	rundll32.exe	85
PID 3096 wrote to memory of 1420	3096	rundll32.exe	85
PID 3096 wrote to memory of 1420	3096	rundll32.exe	85
PID 1420 wrote to memory of 4356	1420	mssecsvr.exe	90
PID 1420 wrote to memory of 4356	1420	mssecsvr.exe	90
PID 1420 wrote to memory of 4356	1420	mssecsvr.exe	90

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c88aa6e79e17b12670cecde5e185108a64afbbab12d789e5e97d131f96332945N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c88aa6e79e17b12670cecde5e185108a64afbbab12d789e5e97d131f96332945N.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3096
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1420
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      PID:4356

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:1968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

1

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
3.6MB

MD5
5aafca3efd0b1bff9d7b98a517f4fc78

SHA1
26157238201eb9968329ee2ec7b11a64a510c676

SHA256
56571071a4ff2044428400d411e5789c8bc0dfb550d9565afc91ac2a821bc0fb

SHA512
0f8474131dc6653fb202ba8f6ad54c3ce2eefc57829cae6f8922cf04586ed909dc5fb3e77b8f6ca5b8d727b725dbf0543f50c57bac0ffc3984de5e7a9c3a5cf3

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C:\Windows\tasksche.exe

Filesize
2.0MB

MD5
f1b717ebec2183e765246746a9b62c76

SHA1
81f170ef7d854fdc583da8b03bb63fecd64028ac

SHA256
d0ff2fd8c8e68dc9b5bd2d1ae58cd44ad189fcd2ba5b3f3bc6d5a24062b58256

SHA512
a0725be1c99657f00f92e16e56b68900272c06ab894f35836fe8277bf8249b7dd540e31c6b71af54c6593f9ec03cff28a4229f2ec1ec5b7aefb219bbd51dec09

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Analysis

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