wannacry | b315819dc4e13a7a9c99322ad0cbb61229afb5fc8682aa4976e8df88fdb2f744

General

Target

aff35c9b8953d54a95fd76f52eb5ab2d.dll
Size

5.0MB
MD5

aff35c9b8953d54a95fd76f52eb5ab2d
SHA1

7c6e8f3e71c256ae603b98b92bedcdbc43705f6e
SHA256

b315819dc4e13a7a9c99322ad0cbb61229afb5fc8682aa4976e8df88fdb2f744
SHA512

35188b87be82fe93c6db61f3ca10d8eaa360c52e27ecab9127ee578f2fe2fc6e973f46d02a128e81fb9d8263f3cd2af3f93981bc1cb38d52c2dcd4422ade4e3f

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1241) 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

748 mssecsvr.exe
1952 mssecsvr.exe

pid	process
748	mssecsvr.exe
1952	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\ZoneMap\	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00c8000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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
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\Content\CachePrefix	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\Wpad	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{8FB71F0A-7BB4-48D6-ADFB-E1305F2DE7A3}	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{8FB71F0A-7BB4-48D6-ADFB-E1305F2DE7A3}\WpadNetworkName = "Network 3"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\be-10-03-b8-c9-ae	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{8FB71F0A-7BB4-48D6-ADFB-E1305F2DE7A3}\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{8FB71F0A-7BB4-48D6-ADFB-E1305F2DE7A3}\be-10-03-b8-c9-ae	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\be-10-03-b8-c9-ae\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\be-10-03-b8-c9-ae\WpadDecisionTime = 606c7700eb9bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\be-10-03-b8-c9-ae\WpadDecision = "0"	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\{8FB71F0A-7BB4-48D6-ADFB-E1305F2DE7A3}\WpadDecisionTime = 606c7700eb9bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{8FB71F0A-7BB4-48D6-ADFB-E1305F2DE7A3}\WpadDecision = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 880	1420	rundll32.exe	rundll32.exe
PID 880 wrote to memory of 748	880	rundll32.exe	mssecsvr.exe
PID 880 wrote to memory of 748	880	rundll32.exe	mssecsvr.exe
PID 880 wrote to memory of 748	880	rundll32.exe	mssecsvr.exe
PID 880 wrote to memory of 748	880	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aff35c9b8953d54a95fd76f52eb5ab2d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1420

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\aff35c9b8953d54a95fd76f52eb5ab2d.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:880

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:748

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:1952

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

1

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvr.exe

Filesize
2.2MB

MD5
b99b12140c92713230de006ca9e2b83f

SHA1
0b4ab4be3349a38c3264684c4c1f2454dedcbe06

SHA256
9c2df2db7490a6fe2f821792d05e98672e79d5202f09513befb689c8ebb55e01

SHA512
13535811c0dda121c6752395428742d7e4f295e12b0da90a1aacdf5d4afc8439b2b4570c91bec19e299e5bf5f9e24fec24b3a1471f5e1df954f7cc3fdad96926

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
b99b12140c92713230de006ca9e2b83f

SHA1
0b4ab4be3349a38c3264684c4c1f2454dedcbe06

SHA256
9c2df2db7490a6fe2f821792d05e98672e79d5202f09513befb689c8ebb55e01

SHA512
13535811c0dda121c6752395428742d7e4f295e12b0da90a1aacdf5d4afc8439b2b4570c91bec19e299e5bf5f9e24fec24b3a1471f5e1df954f7cc3fdad96926

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
b99b12140c92713230de006ca9e2b83f

SHA1
0b4ab4be3349a38c3264684c4c1f2454dedcbe06

SHA256
9c2df2db7490a6fe2f821792d05e98672e79d5202f09513befb689c8ebb55e01

SHA512
13535811c0dda121c6752395428742d7e4f295e12b0da90a1aacdf5d4afc8439b2b4570c91bec19e299e5bf5f9e24fec24b3a1471f5e1df954f7cc3fdad96926

Download Submit
memory/748-56-0x0000000000000000-mapping.dmp

Download
memory/880-54-0x0000000000000000-mapping.dmp

Download
memory/880-55-0x0000000075591000-0x0000000075593000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads