wannacry | 30623a63bf1bb8bd984398ffd47f5fed5c55cd50e4c1be1027fac721c89bce0d

General

Target
30623a63bf1bb8bd984398ffd47f5fed5c55cd50e4c1be1027fac721c89bce0d.dll
Size 5.0MB
Sample260429-swy5msg17r
SHA256 30623a63bf1bb8bd984398ffd47f5fed5c55cd50e4c1be1027fac721c89bce0d
MD5 24ae6c148386737305ec6575835143a5
SHA1 eb5c9a4d1b3011b60d59a16cb5e21ab9d9db90c7
SHA512 900adc6a2b6431f81fb7a1cc7ff8cb17f19b1869c8258b4428582570bbc698008aee38e3ddb38cae37a5ba7eab9ce85ab48fb6dc6cbf6751c5a01a0d381fcf35
SSDEEP 49152:RnnMSPbcBVQej/GXTh+Mo499OM8emamM2/X6RSgWq:1nPoBhzGX9+MDHODemamMIX6RSTq
TLSH
T1C93623C9A9DC41FFD62B6B3975394D891BF33C5CB15A536BA39485B78C23781F808A08
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Family: Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3604) 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
4716	mssecsvr.exe
4660	mssecsvr.exe
3152	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 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
3064	3152	WerFault.exe	83

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 12 IoCs

description	ioc	Process
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 (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\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	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\ZoneMap\	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

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 764	2272	rundll32.exe	80
PID 764 wrote to memory of 4716	764	rundll32.exe	81
PID 4716 wrote to memory of 3152	4716	mssecsvr.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\30623a63bf1bb8bd984398ffd47f5fed5c55cd50e4c1be1027fac721c89bce0d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\30623a63bf1bb8bd984398ffd47f5fed5c55cd50e4c1be1027fac721c89bce0d.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:764
- - 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:4716
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3152
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3152 -s 8
        5⤵
        Program crash
        
        PID:3064

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4660

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3152 -ip 3152
1⤵
PID:2608

Network

MITRE ATT&CK Enterprise v16

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

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 2.2MB
SHA256 59a405fd9027bb069a2f391c95690b20f501a4da423da7bf239c2d0ab43c9272
MD5 7c945e10daf06165cb1303911b67c161
SHA1 4f794e16f86c7698e316e18370a2fa6397c46ec0
SHA512 1b3005e316bbec322a8d1d5ccff8fab6160b9ebe33054e8b0ed547c93675b4abb84d7cfa734dadf7f432dde3ac069b97ee3b3112237892cdab689d1fd050c8a5
SSDEEP 49152:QnnMSPbcBVQej/GXTh+Mo499OM8emamM2/X6RSgWqQ:QnPoBhzGX9+MDHODemamMIX6RSTqQ
TLSH
T19EB523C9A9DC41FFD62B6B3975394D891BF33C6CB15A5367A39485B78C23781F808A08
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 79c4c80dbf4b73f97092e9a9b5ad411937fa62bf3e10e8422d694f4c4d5327d7
MD5 b38b3c60ca804692b401b400297931f0
SHA1 e2b5578e96f60e65f355007699fa8fbe68ab52b5
SHA512 431b1f418b4cc1823076d076e70e4c4c613c58d793662dc11e81ff02f1dac8cebd0a92c425764a11cce1bb3e3bed0027ad8541d592decf46a8db610e6e5d770e
SSDEEP 49152:9MSPbcBVQej/GXTh+Mo499OM8emamM2/X6RSgWqM:9PoBhzGX9+MDHODemamMIX6RSTqM
TLSH
T1179523C9D5E856FFE72F6B7E323859891FD718A8B08A1371E39540A7CC27785E80854C
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/764-4-0x00000000012B0000-0x000000000136B000-memory.dmp

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Analysis

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