wannacry | fef7d768aef62a755ab1cba3c4c92598ed7bed6166ae50b1b7d79238066ff6fd

General

Target

9f754eb9c39e8dff541c226e589f1e84.dll
Size

5.0MB
MD5

9f754eb9c39e8dff541c226e589f1e84
SHA1

fe83d9cff000c98ef818fccfe5205c868620a267
SHA256

fef7d768aef62a755ab1cba3c4c92598ed7bed6166ae50b1b7d79238066ff6fd
SHA512

899ea5bde3023e0f7f98a2f2a42d2a22f72ec22ed7df3f40edf7aa1eadbb6dc3f7c1e6f8e0b9fc5292e1779cbf85c4e1085060f5abc00257323b8f26f8952830

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1213) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1812 mssecsvr.exe
1760 mssecsvr.exe

pid	process
1812	mssecsvr.exe
1760	mssecsvr.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvr.exe

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

Processes:

rundll32.exemssecsvr.exe

description ioc process

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

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

Modifies data under HKEY_USERS 24 IoCs

Processes:

mssecsvr.exe

description	ioc	process
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\Wpad	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\3a-5c-1d-0c-23-5f	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00ca000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\History\CachePrefix = "Visited:"	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\AutoDetect = "1"	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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f\WpadDecisionTime = b097452ef19bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f\WpadDecision = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadDecisionTime = b097452ef19bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{A8E94B1C-2757-4A54-96B6-334B6EEB242A}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\3a-5c-1d-0c-23-5f	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 1952	1976	rundll32.exe	rundll32.exe
PID 1952 wrote to memory of 1812	1952	rundll32.exe	mssecsvr.exe
PID 1952 wrote to memory of 1812	1952	rundll32.exe	mssecsvr.exe
PID 1952 wrote to memory of 1812	1952	rundll32.exe	mssecsvr.exe
PID 1952 wrote to memory of 1812	1952	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9f754eb9c39e8dff541c226e589f1e84.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1976

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9f754eb9c39e8dff541c226e589f1e84.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1952

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1812

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:1760

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
230c6ab10e662c74c0bf69cc0feeadfe

SHA1
523f5deefe3bcf960ce5ee3b76f09a3feed5fc05

SHA256
92ffb943b0b138b671eab95281dd82d99f6d31047eab8526865fcc5a62b4aaf3

SHA512
5bb7b370d2ac7c0818156451307a1b5e883c64b83b873105e14cc497c77d96204795971a0fb4790c3cc6e71efc3b589793fca201258baf66614c70b3eafae8f3

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
230c6ab10e662c74c0bf69cc0feeadfe

SHA1
523f5deefe3bcf960ce5ee3b76f09a3feed5fc05

SHA256
92ffb943b0b138b671eab95281dd82d99f6d31047eab8526865fcc5a62b4aaf3

SHA512
5bb7b370d2ac7c0818156451307a1b5e883c64b83b873105e14cc497c77d96204795971a0fb4790c3cc6e71efc3b589793fca201258baf66614c70b3eafae8f3

Download Submit
C:\Windows\mssecsvr.exe
Filesize
2.2MB

MD5
230c6ab10e662c74c0bf69cc0feeadfe

SHA1
523f5deefe3bcf960ce5ee3b76f09a3feed5fc05

SHA256
92ffb943b0b138b671eab95281dd82d99f6d31047eab8526865fcc5a62b4aaf3

SHA512
5bb7b370d2ac7c0818156451307a1b5e883c64b83b873105e14cc497c77d96204795971a0fb4790c3cc6e71efc3b589793fca201258baf66614c70b3eafae8f3

Download Submit
memory/1812-56-0x0000000000000000-mapping.dmp

Download
memory/1952-54-0x0000000000000000-mapping.dmp

Download
memory/1952-55-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads