wannacry | 3534ca1c2f0bc7f1e7bddd39d156a2cce00987ed4c22d2817680bfa5fc8ccdf0

General

Target

21fb31606845c8fd8d82260bb0ea260f.dll
Size

5.0MB
MD5

21fb31606845c8fd8d82260bb0ea260f
SHA1

c4e230392f7a95e383a358fcf88d9b68b3d979d2
SHA256

3534ca1c2f0bc7f1e7bddd39d156a2cce00987ed4c22d2817680bfa5fc8ccdf0
SHA512

fdd7ea707610c09ec7e88457aa63a239b97ea935a438ad89c87f76a749b25a419703ba9a9b421e52892ee2499bfa73f26c9d01befa6c51057d4812116eee6aca

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1245) 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

1656 mssecsvr.exe
2008 mssecsvr.exe

pid	process
1656	mssecsvr.exe
2008	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\Wpad\12-2c-18-70-08-fd\WpadDecisionTime = 50b7747cc89bd801	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	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\ZoneMap\	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8CA086F-D50D-45A1-AB36-5AD6EAF5BC43}\WpadDecisionTime = 50b7747cc89bd801	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8CA086F-D50D-45A1-AB36-5AD6EAF5BC43}\12-2c-18-70-08-fd	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\Content\CachePrefix	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00e9000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8CA086F-D50D-45A1-AB36-5AD6EAF5BC43}\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8CA086F-D50D-45A1-AB36-5AD6EAF5BC43}\WpadNetworkName = "Network 3"	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\UNCAsIntranet = "0"	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\{C8CA086F-D50D-45A1-AB36-5AD6EAF5BC43}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-2c-18-70-08-fd	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-2c-18-70-08-fd\WpadDecision = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{C8CA086F-D50D-45A1-AB36-5AD6EAF5BC43}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\12-2c-18-70-08-fd\WpadDecisionReason = "1"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 908 wrote to memory of 1096	908	rundll32.exe	rundll32.exe
PID 1096 wrote to memory of 1656	1096	rundll32.exe	mssecsvr.exe
PID 1096 wrote to memory of 1656	1096	rundll32.exe	mssecsvr.exe
PID 1096 wrote to memory of 1656	1096	rundll32.exe	mssecsvr.exe
PID 1096 wrote to memory of 1656	1096	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21fb31606845c8fd8d82260bb0ea260f.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\21fb31606845c8fd8d82260bb0ea260f.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1096

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1656

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:2008

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
456fb8c6da133490533b067a8f206a30

SHA1
fd1d8f09283c53d1e652c8a6b2595ce558cdcd0f

SHA256
cf11a832eb1cd494bea55294740ec00d7c8a906cca8074d237d017fc349d3765

SHA512
3fbe1869ff866dad2aa41e060078dda43a8412a7ec82300583905eaf70cddc1d92d338a740f5bb0e453435b55595713834548e31104c7bd70506065ba71d562b

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

MD5
456fb8c6da133490533b067a8f206a30

SHA1
fd1d8f09283c53d1e652c8a6b2595ce558cdcd0f

SHA256
cf11a832eb1cd494bea55294740ec00d7c8a906cca8074d237d017fc349d3765

SHA512
3fbe1869ff866dad2aa41e060078dda43a8412a7ec82300583905eaf70cddc1d92d338a740f5bb0e453435b55595713834548e31104c7bd70506065ba71d562b

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

MD5
456fb8c6da133490533b067a8f206a30

SHA1
fd1d8f09283c53d1e652c8a6b2595ce558cdcd0f

SHA256
cf11a832eb1cd494bea55294740ec00d7c8a906cca8074d237d017fc349d3765

SHA512
3fbe1869ff866dad2aa41e060078dda43a8412a7ec82300583905eaf70cddc1d92d338a740f5bb0e453435b55595713834548e31104c7bd70506065ba71d562b

Download Submit
memory/1096-54-0x0000000000000000-mapping.dmp

Download
memory/1096-55-0x0000000075D21000-0x0000000075D23000-memory.dmp

Filesize
8KB

Download
memory/1656-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads