wannacry | a868d77d1824dfc85a1fd1a1a1cf7750a183193ef88705da725555961800e0c3

General

Target

509c4f643012e458fe01eb3d8903daec.dll
Size

5.0MB
MD5

509c4f643012e458fe01eb3d8903daec
SHA1

ce4ac99b7876155ac3e2fe3bf63f9a8e6a388caf
SHA256

a868d77d1824dfc85a1fd1a1a1cf7750a183193ef88705da725555961800e0c3
SHA512

97de19178385e7d9cc2f5e72410b95e257afea1c0a0d7d4936f3c20f7754bad1caa1c593161dbf40e273b9dd55794be85bbbf16b48ee4d932d4ab1057d50cbd0

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1200) 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

1996 mssecsvr.exe
1536 mssecsvr.exe

pid	process
1996	mssecsvr.exe
1536	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 (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\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{92D50F7D-37A0-4720-B7FC-D255E7799BB4}\WpadDecisionReason = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\de-30-50-48-1f-cd	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\ProxyEnable = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00cc000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{92D50F7D-37A0-4720-B7FC-D255E7799BB4}\de-30-50-48-1f-cd	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	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\UNCAsIntranet = "0"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{92D50F7D-37A0-4720-B7FC-D255E7799BB4}	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{92D50F7D-37A0-4720-B7FC-D255E7799BB4}\WpadDecisionTime = d0f678b5e49bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{92D50F7D-37A0-4720-B7FC-D255E7799BB4}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\de-30-50-48-1f-cd\WpadDecisionTime = d0f678b5e49bd801	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\de-30-50-48-1f-cd\WpadDecision = "0"	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\Content\CachePrefix	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{92D50F7D-37A0-4720-B7FC-D255E7799BB4}\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\de-30-50-48-1f-cd\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 2020 wrote to memory of 1648	2020	rundll32.exe	rundll32.exe
PID 1648 wrote to memory of 1996	1648	rundll32.exe	mssecsvr.exe
PID 1648 wrote to memory of 1996	1648	rundll32.exe	mssecsvr.exe
PID 1648 wrote to memory of 1996	1648	rundll32.exe	mssecsvr.exe
PID 1648 wrote to memory of 1996	1648	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\509c4f643012e458fe01eb3d8903daec.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2020

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\509c4f643012e458fe01eb3d8903daec.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1648

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1996

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:1536

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

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Downloads

C:\WINDOWS\mssecsvr.exe
Filesize
2.2MB

MD5
d496a21f0f27b8acba1030e145fce2c1

SHA1
e811e36c029e2621f5d4ab2a8cf8eb269f41b43f

SHA256
5c7b038ff7d32047e2b4c48726b95d3befa54cd60b1a1884e78aab3733ef748c

SHA512
53e10e8ddc8c13350b499f1607f79a6ff2b0f7f65e370cbddccdfa46a6f12608b0c9a2d99111b3eaaf599743e6059a779ca543d76b8b848db759252a8d1a2079

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

MD5
d496a21f0f27b8acba1030e145fce2c1

SHA1
e811e36c029e2621f5d4ab2a8cf8eb269f41b43f

SHA256
5c7b038ff7d32047e2b4c48726b95d3befa54cd60b1a1884e78aab3733ef748c

SHA512
53e10e8ddc8c13350b499f1607f79a6ff2b0f7f65e370cbddccdfa46a6f12608b0c9a2d99111b3eaaf599743e6059a779ca543d76b8b848db759252a8d1a2079

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

MD5
d496a21f0f27b8acba1030e145fce2c1

SHA1
e811e36c029e2621f5d4ab2a8cf8eb269f41b43f

SHA256
5c7b038ff7d32047e2b4c48726b95d3befa54cd60b1a1884e78aab3733ef748c

SHA512
53e10e8ddc8c13350b499f1607f79a6ff2b0f7f65e370cbddccdfa46a6f12608b0c9a2d99111b3eaaf599743e6059a779ca543d76b8b848db759252a8d1a2079

Download Submit
memory/1648-54-0x0000000000000000-mapping.dmp

Download
memory/1648-55-0x0000000075BF1000-0x0000000075BF3000-memory.dmp

Filesize
8KB

Download
memory/1996-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads