wannacry | ac9690890a322d9aeaa15bc4c14c8e8fd50a90743137b0038729e4cab43b3fc3

General

Target

c611e75388a3762e46f003dc40413cf3_JaffaCakes118.dll
Size

5.0MB
MD5

c611e75388a3762e46f003dc40413cf3
SHA1

e9f24927b99e4c6bd3f35a25ee135828b216e569
SHA256

ac9690890a322d9aeaa15bc4c14c8e8fd50a90743137b0038729e4cab43b3fc3
SHA512

1e355a57b8d1efbe446c9fff7ebfef665eba2becce49ea9e357a570d04934ad3a8e40af25b703f2f6bb1e61701fb6e12e30de80cfe0d5151cb9c98098ff00edc
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9LEau:+DqPoBhz1aRxcSUDk36SAEdhvxWa9y

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3126) 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
2156	mssecsvc.exe
476	mssecsvc.exe
1992	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 1 IoCs

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

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 24 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7CCEDC21-C10D-4568-9B7C-50833EAEC4CF}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7CCEDC21-C10D-4568-9B7C-50833EAEC4CF}\WpadDecision = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7CCEDC21-C10D-4568-9B7C-50833EAEC4CF}\d6-06-5f-87-f7-a5	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7CCEDC21-C10D-4568-9B7C-50833EAEC4CF}	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7CCEDC21-C10D-4568-9B7C-50833EAEC4CF}\WpadDecisionTime = 7025175bf0f8da01	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{7CCEDC21-C10D-4568-9B7C-50833EAEC4CF}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\d6-06-5f-87-f7-a5	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\d6-06-5f-87-f7-a5\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\d6-06-5f-87-f7-a5\WpadDecisionTime = 7025175bf0f8da01	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f019d000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\d6-06-5f-87-f7-a5\WpadDecision = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 1292 wrote to memory of 772	1292	rundll32.exe	31
PID 772 wrote to memory of 2156	772	rundll32.exe	32
PID 772 wrote to memory of 2156	772	rundll32.exe	32
PID 772 wrote to memory of 2156	772	rundll32.exe	32
PID 772 wrote to memory of 2156	772	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c611e75388a3762e46f003dc40413cf3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1292
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c611e75388a3762e46f003dc40413cf3_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:772
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2156
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1992

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:476

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

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
6da447e2d8b91aae7fc416d0fe34c598

SHA1
bf95af17d8f25629613594f38a352d178a50eda5

SHA256
d78f3c65fc376d675af5c47382a191efdbeacd577b343f7a458fd0e18f7c9831

SHA512
4158fe5a35144acb3fc5dc9d9d1dc8410e0d9713b16692bf003b0ada02874d8e1353b99d62d3d9516f3ac97c6b102bf5a753f4352eeeb9699cbce5f45acb5129

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
bf4e83c05dbf8f486bc7599771f795c9

SHA1
2d434d5098689667d247195320784772e819dbb1

SHA256
10dcfd19fe45fb8517f35ee066642b8b71bca2074a1154725fe8d9609e9cdf82

SHA512
02f4816f78502790b3d8690a45ac8193d7e5a298f8246e320cc79e9418b3f9859985cddbd662b814b14266d9c0504495f9a7ead203404bc29e61e3bfef3ddce2

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Analysis

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