wannacry | a41062ef62f9881bc43d6315ef440cafcbe9e2765f7340f2610d316f44306fec

General

Target

a80c332f89ef54af079b36f9b7f43848_JaffaCakes118.dll
Size

5.0MB
MD5

a80c332f89ef54af079b36f9b7f43848
SHA1

9f9490666b6e9c4e286321fbdba587997322fcc7
SHA256

a41062ef62f9881bc43d6315ef440cafcbe9e2765f7340f2610d316f44306fec
SHA512

a44d47e192180b3515a07b45f23dfc35baa4afe8b203de6ac37d87e955558f01235c508795c8f8865d3d76617a8fa2cfde3d152fc1c611508fa141d589e95f3a
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R88:+DqPe1Cxcxk3ZAEUadzR8

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3292) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2076 mssecsvc.exe
2124 mssecsvc.exe
2636 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

pid	process
2076	mssecsvc.exe
2124	mssecsvc.exe
2636	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	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 = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{85BC396E-56CE-4E7F-A676-F38F04CBFC53}\WpadDecisionTime = 50a9b62616beda01	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{85BC396E-56CE-4E7F-A676-F38F04CBFC53}\9a-1d-ac-c2-a1-15	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-1d-ac-c2-a1-15\WpadDecision = "0"	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	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f0120000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\Connections	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	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\Cookies\CachePrefix = "Cookie:"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{85BC396E-56CE-4E7F-A676-F38F04CBFC53}\WpadDecision = "0"	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{85BC396E-56CE-4E7F-A676-F38F04CBFC53}\WpadNetworkName = "Network 3"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-1d-ac-c2-a1-15	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-1d-ac-c2-a1-15\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\9a-1d-ac-c2-a1-15\WpadDecisionTime = 50a9b62616beda01	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{85BC396E-56CE-4E7F-A676-F38F04CBFC53}	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{85BC396E-56CE-4E7F-A676-F38F04CBFC53}\WpadDecisionReason = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2512 wrote to memory of 2756	2512	rundll32.exe	rundll32.exe
PID 2756 wrote to memory of 2076	2756	rundll32.exe	mssecsvc.exe
PID 2756 wrote to memory of 2076	2756	rundll32.exe	mssecsvc.exe
PID 2756 wrote to memory of 2076	2756	rundll32.exe	mssecsvc.exe
PID 2756 wrote to memory of 2076	2756	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a80c332f89ef54af079b36f9b7f43848_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2512

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a80c332f89ef54af079b36f9b7f43848_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2756

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2076

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2636

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2124

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
a08cc91f15c5102630c134ebf7589f8c

SHA1
d8e9a7e895832518e9dcfbf6796b701fc2b5098e

SHA256
d9e050988aa122ed60c223ed749013771897ff6bb2194aa69d0c77cf38c989b2

SHA512
4e6195e6a409697734daa080e5c74e7ae058e3c623d7f7d350d044b72ef8bdd6eb7e1454e990818adcb4c506498e2a799981f4147aa705a03f645f9bca3c6fc2

Download Submit
C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
17d79f96710365f9c512cc179c205f49

SHA1
e32f8dcde8508d40af3731477b89af57590d3f5b

SHA256
5491ec65e007e50580f6444713dfb558a62c38a4727408e85eb9c92080bad7bd

SHA512
65fc26a1ea73380ed3c3720a7e3aeb3ed87a50623cdd776008671a10e4fe197625e19e8f18567dfec750fe811a7239e42f3e76a36013283fc85e10fc5cbdb28c

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads