wannacry | 4ad2a09b3c99f31faf5f46b2298dcf2e9c5b84a96732bffea2fcf4e2c2aa791e

General

Target

4ad2a09b3c99f31faf5f46b2298dcf2e9c5b84a96732bffea2fcf4e2c2aa791e.dll
Size

5.0MB
MD5

d907672759069af4824b0354e9170285
SHA1

d995544a19032e9cebdd6d76c03580a89bd7a330
SHA256

4ad2a09b3c99f31faf5f46b2298dcf2e9c5b84a96732bffea2fcf4e2c2aa791e
SHA512

4b95745fd90589bc154ca7a22bd5dd625332d0f7bf9a87db198e8253012871b7fb108793d7372658515ad2b4cdd12c5047ff06120d43c1de673e8e3b6d5ad6bd
SSDEEP

49152:RnVENPbcBVQej/1INRx+TSqTdX1HkQo6SAA:1VOoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3294) 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
2292	mssecsvr.exe
4724	mssecsvr.exe
2472	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 2 IoCs

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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2892	2472	WerFault.exe	85

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
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\UNCAsIntranet = "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	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\P3P\History	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	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

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 2448	4884	rundll32.exe	82
PID 4884 wrote to memory of 2448	4884	rundll32.exe	82
PID 4884 wrote to memory of 2448	4884	rundll32.exe	82
PID 2448 wrote to memory of 2292	2448	rundll32.exe	83
PID 2448 wrote to memory of 2292	2448	rundll32.exe	83
PID 2448 wrote to memory of 2292	2448	rundll32.exe	83
PID 2292 wrote to memory of 2472	2292	mssecsvr.exe	85
PID 2292 wrote to memory of 2472	2292	mssecsvr.exe	85
PID 2292 wrote to memory of 2472	2292	mssecsvr.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4ad2a09b3c99f31faf5f46b2298dcf2e9c5b84a96732bffea2fcf4e2c2aa791e.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4884
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4ad2a09b3c99f31faf5f46b2298dcf2e9c5b84a96732bffea2fcf4e2c2aa791e.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2448
- - 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:2292
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2472
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2472 -s 596
        5⤵
        Program crash
        
        PID:2892

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:4724

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2472 -ip 2472
1⤵
PID:640

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

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
b15fb425b628062a7bb0f11dbaecf4ac

SHA1
016ebb19fb4a8d125867d63faa200e77df1273e7

SHA256
ebe31fd906bdf28945926cee334266abd14c7a81390c13867d1abfdc1dc8f540

SHA512
0db0b74354a5444d0a6134faa4dde79750ac110fee116235b5bb908988868f171b63966d5e2acb28319ea2138880777f284515520a5d1a945c163e35db98ef4c

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C:\Windows\tasksche.exe

Filesize
2.0MB

MD5
41c0e22d28973f312de789c027e61d0c

SHA1
193f7413961324eda1f3f8cd0f6010fcb73028ec

SHA256
282afb52e37bfb69d3016e1bb99e11aa9d6d9cb7759ba02279e44eeb9f504a9b

SHA512
d4196d39077e6f7ad8e402762fad33b3ce74558fd8c34b412dda96a118bb421927cec5816c6d5728de79288dfeccba066630211043b35c16c1a165a4bec19a37

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Analysis

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