wannacry | 540749acd2da3530292fed430ee05bd8752bd4f40499b987da31a24e67959352

General

Target

235b5532f63214e7072d770e0f6d48e0.dll
Size

5.0MB
MD5

235b5532f63214e7072d770e0f6d48e0
SHA1

f3fcd3d926de73b68c33ab3bcf2cf5b02c52a7f1
SHA256

540749acd2da3530292fed430ee05bd8752bd4f40499b987da31a24e67959352
SHA512

4be89f70edd317a709d3453e5ef5636f902657a0fdbd1d3ee8baf73ee874b2faef4f3b0ef562b718ab392f60c759ae7ee77507823fb612f370f9e9cf87f6f50d

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1218) 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

280 mssecsvr.exe
2040 mssecsvr.exe

pid	process
280	mssecsvr.exe
2040	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
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\Wpad\{BD3673BF-48A3-41C2-95E6-96B7F21C007E}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{BD3673BF-48A3-41C2-95E6-96B7F21C007E}\WpadDecisionTime = 908a64a5e79bd801	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{BD3673BF-48A3-41C2-95E6-96B7F21C007E}\WpadNetworkName = "Network 3"	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\ProxyEnable = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00bd000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{BD3673BF-48A3-41C2-95E6-96B7F21C007E}\WpadDecision = "0"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-c3-ef-61-21-da\WpadDecisionTime = 908a64a5e79bd801	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\{BD3673BF-48A3-41C2-95E6-96B7F21C007E}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{BD3673BF-48A3-41C2-95E6-96B7F21C007E}\b6-c3-ef-61-21-da	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 (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 (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-c3-ef-61-21-da\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\b6-c3-ef-61-21-da\WpadDecisionReason = "1"	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 (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	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\b6-c3-ef-61-21-da	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1536	640	rundll32.exe	rundll32.exe
PID 1536 wrote to memory of 280	1536	rundll32.exe	mssecsvr.exe
PID 1536 wrote to memory of 280	1536	rundll32.exe	mssecsvr.exe
PID 1536 wrote to memory of 280	1536	rundll32.exe	mssecsvr.exe
PID 1536 wrote to memory of 280	1536	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\235b5532f63214e7072d770e0f6d48e0.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\235b5532f63214e7072d770e0f6d48e0.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1536

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:280

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:2040

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
93fe708da0f1871a3ec4cb49fa9f0acf

SHA1
19680ac7595d06e9a545fd0ca73a217852c64140

SHA256
ca5431aceed5cf5533f1db4ef6aca5d764afb8ea336a370854932b19a594e3dc

SHA512
187099291b25ec2f65c167bdeec7079a92aa7a653962e069a2edc7dd620e423edeb3ba88240feba4aa6efd38084b902940c4a309272b56501a5f0f66b4eb85b6

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

MD5
93fe708da0f1871a3ec4cb49fa9f0acf

SHA1
19680ac7595d06e9a545fd0ca73a217852c64140

SHA256
ca5431aceed5cf5533f1db4ef6aca5d764afb8ea336a370854932b19a594e3dc

SHA512
187099291b25ec2f65c167bdeec7079a92aa7a653962e069a2edc7dd620e423edeb3ba88240feba4aa6efd38084b902940c4a309272b56501a5f0f66b4eb85b6

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

MD5
93fe708da0f1871a3ec4cb49fa9f0acf

SHA1
19680ac7595d06e9a545fd0ca73a217852c64140

SHA256
ca5431aceed5cf5533f1db4ef6aca5d764afb8ea336a370854932b19a594e3dc

SHA512
187099291b25ec2f65c167bdeec7079a92aa7a653962e069a2edc7dd620e423edeb3ba88240feba4aa6efd38084b902940c4a309272b56501a5f0f66b4eb85b6

Download Submit
memory/280-56-0x0000000000000000-mapping.dmp

Download
memory/1536-54-0x0000000000000000-mapping.dmp

Download
memory/1536-55-0x0000000076921000-0x0000000076923000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads