wannacry | 67e6c96d995da1cf7052d9c27ac740c5b42fc5982b79f53ceb201b0a8f894663

General

Target

f7b1bd2aa9ce09a273243560db7bad8a_JaffaCakes118.dll
Size

5.0MB
MD5

f7b1bd2aa9ce09a273243560db7bad8a
SHA1

2d682b3a9bf4d09d8d2fa3986cae4a194764a273
SHA256

67e6c96d995da1cf7052d9c27ac740c5b42fc5982b79f53ceb201b0a8f894663
SHA512

ab4127003fddd41abb8b50f1737b3a1552f7932724bab6d9d1c30ac1aec500b801a72873f4160c421abe7da60e60d4275dffdcf68aa583ec73abb57df082bee1
SSDEEP

49152:RnpEKUvxcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:1pyvOBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3272) 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
2360	mssecsvr.exe
2184	mssecsvr.exe
2712	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 5 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\5PYGHDGN.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\5PYGHDGN.txt	mssecsvr.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\MK2MS05V.txt	mssecsvr.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Roaming\Microsoft\Windows\Cookies\MK2MS05V.txt	mssecsvr.exe
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 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_259436901	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 24 IoCs

description	ioc	Process
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00e1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EB024992-DF60-4BD3-9859-3CAA57D210B7}\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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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 (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-5d-69-46-0c-98	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-5d-69-46-0c-98\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-5d-69-46-0c-98\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EB024992-DF60-4BD3-9859-3CAA57D210B7}\WpadDecisionTime = c07c420dd70fdb01	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\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\02-5d-69-46-0c-98\WpadDecisionTime = c07c420dd70fdb01	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EB024992-DF60-4BD3-9859-3CAA57D210B7}\02-5d-69-46-0c-98	mssecsvr.exe
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EB024992-DF60-4BD3-9859-3CAA57D210B7}	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EB024992-DF60-4BD3-9859-3CAA57D210B7}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{EB024992-DF60-4BD3-9859-3CAA57D210B7}\WpadNetworkName = "Network 3"	mssecsvr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2712	tasksche.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 1272 wrote to memory of 2188	1272	rundll32.exe	30
PID 2188 wrote to memory of 2360	2188	rundll32.exe	31
PID 2188 wrote to memory of 2360	2188	rundll32.exe	31
PID 2188 wrote to memory of 2360	2188	rundll32.exe	31
PID 2188 wrote to memory of 2360	2188	rundll32.exe	31
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33
PID 2360 wrote to memory of 2712	2360	mssecsvr.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f7b1bd2aa9ce09a273243560db7bad8a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f7b1bd2aa9ce09a273243560db7bad8a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2188
- - 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:2360
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: GetForegroundWindowSpam
      PID:2712

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:2184

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\tasksche.exe

Filesize
2.0MB

MD5
c4640e5a8a68c8aa313e8127a1d797ed

SHA1
3fa7396d3bf4a070f426a5ac2d3928cff2dc3eaf

SHA256
3d5891d7cd3c675aa40d8671866375750385ad58bf75bfc386954c3aab4ea241

SHA512
0a1b1057ff7dcdfee7f86142617b2ef230f53c964c9423c48e347dcf21c8a4186ed10d1dfe1a90cbde321adf4da51865205e47800d9e59d0c1dc8db76bd3ef1c

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
d61fdd87eaac262a8a77080ee54edb46

SHA1
121b1edae817d516515080d8c06225f34b1fce04

SHA256
2777e4e00f60f7fc101c3181c782a83ec306425ce7d9e72c6e42fde2a4247168

SHA512
6c520701fb7eb28e9417507f9426f2dabbd624009df8dcfab8b624b13b8041a5b88ed62fb99321ebeb2fe8c35746e541d1b88f10597d384e58f4f1811dbb05ba

Download Submit

Analysis

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