wannacry | 21d52f970117819dab150b9d71d64d2afb3794ca7c6de574321d27b1849b71b0

General

Target

21d52f970117819dab150b9d71d64d2afb3794ca7c6de574321d27b1849b71b0.dll
Size

5.0MB
MD5

ffe9ccaad1190c36b7df3b8bdcb45875
SHA1

1a7ed5614247c958d2b3f8da2411ddf5a85e16a9
SHA256

21d52f970117819dab150b9d71d64d2afb3794ca7c6de574321d27b1849b71b0
SHA512

0a16711d9a1a78341b32ae31f768cb2afadcd4d61878fa48d23572efae7d6c99066c17154290d82cdd8916a3fa4e756c7be887f5f6c58be0c63fd112cae965db

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1014) 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:

mssecsvc.exemssecsvc.exe

pid process

900 mssecsvc.exe
1860 mssecsvc.exe

pid	process
900	mssecsvc.exe
1860	mssecsvc.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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00a4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3B68D511-C184-464D-A2F7-463C9ADFF6CA}\WpadDecisionReason = "1"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3B68D511-C184-464D-A2F7-463C9ADFF6CA}\WpadDecisionTime = 2098f488677ed801	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\92-75-20-95-04-0d\WpadDecisionReason = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\92-75-20-95-04-0d\WpadDecision = "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\{3B68D511-C184-464D-A2F7-463C9ADFF6CA}\92-75-20-95-04-0d	mssecsvc.exe
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	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\Wpad\{3B68D511-C184-464D-A2F7-463C9ADFF6CA}	mssecsvc.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{3B68D511-C184-464D-A2F7-463C9ADFF6CA}\WpadNetworkName = "Network 2"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\92-75-20-95-04-0d	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
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 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\{3B68D511-C184-464D-A2F7-463C9ADFF6CA}\WpadDecision = "0"	mssecsvc.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\92-75-20-95-04-0d\WpadDecisionTime = 2098f488677ed801	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 1484 wrote to memory of 952	1484	rundll32.exe	rundll32.exe
PID 952 wrote to memory of 900	952	rundll32.exe	mssecsvc.exe
PID 952 wrote to memory of 900	952	rundll32.exe	mssecsvc.exe
PID 952 wrote to memory of 900	952	rundll32.exe	mssecsvc.exe
PID 952 wrote to memory of 900	952	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21d52f970117819dab150b9d71d64d2afb3794ca7c6de574321d27b1849b71b0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1484

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21d52f970117819dab150b9d71d64d2afb3794ca7c6de574321d27b1849b71b0.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:952

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:900

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:1860

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

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
5ad188090c5943dd1aa50ecbaadcb1e9

SHA1
88bce55d3d47e2b045174d49a960c32e9774f326

SHA256
3b4bfdd3adca02cc079e1cd7c2388792777e5d0880cf4aeaecc3f206ccad9693

SHA512
d36660fea21d9c2b6a0f42559dc3a94d9468cd28890ac11044e21add55e3a82b0c046cefa7680c1807fc60b629b766536d4015e98c9cea2ac47a2150106b215f

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
5ad188090c5943dd1aa50ecbaadcb1e9

SHA1
88bce55d3d47e2b045174d49a960c32e9774f326

SHA256
3b4bfdd3adca02cc079e1cd7c2388792777e5d0880cf4aeaecc3f206ccad9693

SHA512
d36660fea21d9c2b6a0f42559dc3a94d9468cd28890ac11044e21add55e3a82b0c046cefa7680c1807fc60b629b766536d4015e98c9cea2ac47a2150106b215f

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
5ad188090c5943dd1aa50ecbaadcb1e9

SHA1
88bce55d3d47e2b045174d49a960c32e9774f326

SHA256
3b4bfdd3adca02cc079e1cd7c2388792777e5d0880cf4aeaecc3f206ccad9693

SHA512
d36660fea21d9c2b6a0f42559dc3a94d9468cd28890ac11044e21add55e3a82b0c046cefa7680c1807fc60b629b766536d4015e98c9cea2ac47a2150106b215f

Download Submit
memory/900-56-0x0000000000000000-mapping.dmp

Download
memory/952-54-0x0000000000000000-mapping.dmp

Download
memory/952-55-0x0000000076431000-0x0000000076433000-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