wannacry | eab75ed8496c3cf143f124f7dce9ab6d5dffac0a6d1680f1c85ca193fcbf2af4

General

Target
eab75ed8496c3cf143f124f7dce9ab6d5dffac0a6d1680f1c85ca193fcbf2af4.dll
Size 5.0MB
Sample260311-vy5fjsg15k
SHA256 eab75ed8496c3cf143f124f7dce9ab6d5dffac0a6d1680f1c85ca193fcbf2af4
MD5 d9ccc13c368a649d11dadba466528742
SHA1 0206f9eb7f274970eb415620e814a9d9ae81a7a0
SHA512 75edce4327efb7bd6c6182e715f625c786f0602be27a132dab9213463ede31c79a436f37eb29cea9562d82792f6804bcdf079cab086aeb35c25b472951149962
SSDEEP 24576:RbLguriDQhfdmMSirYbcMNgef0QeQjGCX6SASk:RnuQqMSPbcBVQeje6SA
TLSH
T146362396756C91FCC00666B9A4674925B2B37C9E22FE9B0FDB908A220D03750FF64F47
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery wannacry ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3261) 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
3988	mssecsvr.exe
5000	mssecsvr.exe
5024	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
3672	5024	WerFault.exe	81

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	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 (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	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
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\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 492 wrote to memory of 5568	492	rundll32.exe	78
PID 5568 wrote to memory of 3988	5568	rundll32.exe	79
PID 3988 wrote to memory of 5024	3988	mssecsvr.exe	81

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\eab75ed8496c3cf143f124f7dce9ab6d5dffac0a6d1680f1c85ca193fcbf2af4.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:492
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\eab75ed8496c3cf143f124f7dce9ab6d5dffac0a6d1680f1c85ca193fcbf2af4.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5568
- - 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:3988
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5024
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 5024 -s 8
        5⤵
        Program crash
        
        PID:3672

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:5000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5024 -ip 5024
1⤵
PID:3740

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 2e08f5c2235e6c265310a2971d0ef1046411b6203841ec9147b625c916ac61bf
MD5 ae317c0922682cac74ea88c7ad162ee2
SHA1 d42627b92aaa779de3e43be8adf0c1f004cfe177
SHA512 39d563d00732a68ea0624dd3fc3c6abcf69a95d6ec7ffd565246c268dcd605ac25dde2fb9aec631b63ac555dfd676b888b1366386260752f708ea170d42a3db7
SSDEEP 24576:QbLguriDQhfdmMSirYbcMNgef0QeQjGCX6SASk:QnuQqMSPbcBVQeje6SA
TLSH
T169B52396756C91FCC00666B8A4674925B2B37C9E22FE9B0FDB908A620D03750FF64F47
MD5 SHA1 SHA512 SSDEEP TLSH

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 2.0MB
SHA256 5465c89bcd48be77ded313dd66dbf7f80e12cc5a658c4d6cf6111ecfab41fb3f
MD5 8eb1e0402bf3f1474ecf47b0991c399d
SHA1 d6daadc04f70240c79658319ad5052128f3c1e9a
SHA512 9156f4f4be2e85525c98d01d07a652640a73b2f934f08a87e15eea8b13a4d1c63ff94309745f83b409a16b34a8ceb18d9d3e94afa51d485d04406ec6f0ccea2a
SSDEEP 24576:tiDQhfdmMSirYbcMNgef0QeQjGCX6SASk:gQqMSPbcBVQeje6SA
TLSH
T1C59523E6A17173FCE3072DFDB05A805631A524EA31DF6F16EB900552AC06F68DF50ACA
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5568-4-0x0000000000870000-0x00000000008EA000-memory.dmp

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Analysis

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