wannacry | 10dd546c48ddfe24bf50fa7438f8b4a2e66e6f8045a4ee41b7948855c61a846b

General

Target

8da3345636b0f9b8c0acc811f5a26c61_JaffaCakes118.dll
Size

5.0MB
MD5

8da3345636b0f9b8c0acc811f5a26c61
SHA1

ba21e0b470f9c7f2730f49e93bbb354fbae09aa8
SHA256

10dd546c48ddfe24bf50fa7438f8b4a2e66e6f8045a4ee41b7948855c61a846b
SHA512

ccbc07235c3776f4261385791e8f7a9e66aacb62ed80bf511c4aee883a24c9e57dfed2dce91f4fa3cfc5fbdbecba1b51b445ec40103d2f676c493134c607f550
SSDEEP

24576:RbLguriBJMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626M+vbOSSqTPVXmi:RnGMSPbcBVQej/1INRx+TSqTdX1

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2101) 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
2904	mssecsvr.exe
2792	mssecsvr.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	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 24 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EC247295-DF85-40CB-9A6C-F78453178A33}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EC247295-DF85-40CB-9A6C-F78453178A33}\42-7c-58-1e-41-fd	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\42-7c-58-1e-41-fd\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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\UNCAsIntranet = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EC247295-DF85-40CB-9A6C-F78453178A33}\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EC247295-DF85-40CB-9A6C-F78453178A33}\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\42-7c-58-1e-41-fd	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\42-7c-58-1e-41-fd\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EC247295-DF85-40CB-9A6C-F78453178A33}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\42-7c-58-1e-41-fd\WpadDecisionTime = b0de1f777fecda01	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EC247295-DF85-40CB-9A6C-F78453178A33}\WpadDecisionTime = b0de1f777fecda01	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1696 wrote to memory of 1720	1696	rundll32.exe	30
PID 1720 wrote to memory of 2904	1720	rundll32.exe	31
PID 1720 wrote to memory of 2904	1720	rundll32.exe	31
PID 1720 wrote to memory of 2904	1720	rundll32.exe	31
PID 1720 wrote to memory of 2904	1720	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8da3345636b0f9b8c0acc811f5a26c61_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8da3345636b0f9b8c0acc811f5a26c61_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1720
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2904

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:2792

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
2.2MB

MD5
d4c4720c089d536af3e08ebd93d87a6f

SHA1
a73e5085cfc94451f4842e4ddb816fc7dbf1b760

SHA256
f86390b107563635cb3880f372d5a06186c93d7e1fa4297898e5d44cf166e8a1

SHA512
4259b9174c98f31af3c947851d46951e51f4fb48287a7b2a64f38a4641f767a2992fec8bbdd48556ab1dddcc8d516da2b2ce9622fdd355edb023d2b130db096a

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