wannacry | f68b4302c6c3755819ba9ffed82a2d8d1886a08e658c5794fbb8aed4e199f61e

General

Target

c5dfaa0dc131c9913541c3dc1b2c105d_JaffaCakes118.dll
Size

5.0MB
MD5

c5dfaa0dc131c9913541c3dc1b2c105d
SHA1

877d25ba4ae5148096cd78ca060c07efc9ecbe69
SHA256

f68b4302c6c3755819ba9ffed82a2d8d1886a08e658c5794fbb8aed4e199f61e
SHA512

23d737443df19a5b87b653dde149effcf5623cc1795e033e5de4bae459c94aef2010110632f0268e27ece965f2f50fb4e6f1f0a73e8ebbd2430926d101067508
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdkQo6SAARdhnvxJM0H9:+DqPoBhz1aRxcSUdk36SAEdhvxWa9

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3203) 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
2416	mssecsvc.exe
2824	mssecsvc.exe
2300	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
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{9D9421D3-DDFD-4F5A-A6E0-282D7C20C8B2}\WpadDecisionTime = 70a1397bd2f8da01	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 (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f018f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{9D9421D3-DDFD-4F5A-A6E0-282D7C20C8B2}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{9D9421D3-DDFD-4F5A-A6E0-282D7C20C8B2}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{9D9421D3-DDFD-4F5A-A6E0-282D7C20C8B2}\fe-b5-7d-4e-08-22	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-b5-7d-4e-08-22\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-b5-7d-4e-08-22\WpadDecisionTime = 70a1397bd2f8da01	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\Cookies\CachePrefix = "Cookie:"	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\{9D9421D3-DDFD-4F5A-A6E0-282D7C20C8B2}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{9D9421D3-DDFD-4F5A-A6E0-282D7C20C8B2}\WpadDecisionReason = "1"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-b5-7d-4e-08-22	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\fe-b5-7d-4e-08-22\WpadDecision = "0"	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\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	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	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2112 wrote to memory of 2396	2112	rundll32.exe	30
PID 2396 wrote to memory of 2416	2396	rundll32.exe	31
PID 2396 wrote to memory of 2416	2396	rundll32.exe	31
PID 2396 wrote to memory of 2416	2396	rundll32.exe	31
PID 2396 wrote to memory of 2416	2396	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c5dfaa0dc131c9913541c3dc1b2c105d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c5dfaa0dc131c9913541c3dc1b2c105d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2396
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2416
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2300

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:2824

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
8fea59c1ba740e83c9e24e76ed4ee59f

SHA1
eaecd5a68a7563c299650b8d8f2d60e5270f4b09

SHA256
f6921ee693d438716ef971a39557d2e1f6234912a9c8aad0bde2d88fb5494097

SHA512
e3986049289d854bf1ced40b23d6410b1b955c67b62cb62924402261ff7da92869ea7b0f1fbd505ef21ec9e98fbef51072e82fda1751374958050790585b7c1f

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
6b2981f793b6812ba3292c1263bc51f5

SHA1
d80624ad8ce33a3e5b2be30dc18c6133c6ece9f1

SHA256
b83b616f2e2fcf46b11a71e351797768a80a05a84cdb4312906b82437ce27585

SHA512
d8c2d2febee8a33b82db6ef40d3a8bcc8af2907a2244dcfcceb2e2bd193a9b3e783a8a2aa053728d856a263e2fda07a2789677373242ff65af585a6f51e0e5e6

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Analysis

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