wannacry | 160e2472990bf9dcf470f31d49467bd35bb4233f60a3a2731c52d30a1682cbd3

General

Target

b6ec495ca5cca1f20042919a1872924d.dll
Size

5.0MB
MD5

b6ec495ca5cca1f20042919a1872924d
SHA1

85aa1f50f9841df88fb4ebfa57e0d45f67fb25be
SHA256

160e2472990bf9dcf470f31d49467bd35bb4233f60a3a2731c52d30a1682cbd3
SHA512

1d39e305a32c4ae239a21dd9608a2acd2248546d38fad5353d19b1b430bce096df2fef7190ae33068067220a7d39d3ba671464b1d41eb3269eb2251cd7156b23

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (1247) 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

1892 mssecsvr.exe
2028 mssecsvr.exe

pid	process
1892	mssecsvr.exe
2028	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\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadDecisionTime = 700288d5eb9bd801	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	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\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\06-75-a7-dd-b9-dc	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc\WpadDecisionReason = "1"	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 (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\Connections\DefaultConnectionSettings = 4600000003000000090000000000000000000000000000000400000000000000000000000000000000000000000000000000000001000000020000000a7f00cd000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadDecisionReason = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadDecision = "0"	mssecsvr.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\{2E9134DB-3C23-4031-8933-B00BB05E13E0}\WpadNetworkName = "Network 3"	mssecsvr.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc\WpadDecisionTime = 700288d5eb9bd801	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\AutoDetect = "1"	mssecsvr.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\06-75-a7-dd-b9-dc\WpadDecision = "0"	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	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1420	640	rundll32.exe	rundll32.exe
PID 1420 wrote to memory of 1892	1420	rundll32.exe	mssecsvr.exe
PID 1420 wrote to memory of 1892	1420	rundll32.exe	mssecsvr.exe
PID 1420 wrote to memory of 1892	1420	rundll32.exe	mssecsvr.exe
PID 1420 wrote to memory of 1892	1420	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b6ec495ca5cca1f20042919a1872924d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b6ec495ca5cca1f20042919a1872924d.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1420

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1892

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:2028

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
0dfe37f1a31df5a9cfc690dabf7764f3

SHA1
e36e29daeba0cdb6c9bddf82e80b4a1987b5b58b

SHA256
01ab0bcc6aaa0c16bb9b03110b46a2f39a6a755d9f1157fcc01b37f2cfc918ad

SHA512
86712d3dace929bcd53f0d9f400f695c81fa62fc4a0e79083c41d9469fe353428a0942f8e47db74e875e2c03a860b057334ddf0541d75c0d38f821adf2f84489

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
0dfe37f1a31df5a9cfc690dabf7764f3

SHA1
e36e29daeba0cdb6c9bddf82e80b4a1987b5b58b

SHA256
01ab0bcc6aaa0c16bb9b03110b46a2f39a6a755d9f1157fcc01b37f2cfc918ad

SHA512
86712d3dace929bcd53f0d9f400f695c81fa62fc4a0e79083c41d9469fe353428a0942f8e47db74e875e2c03a860b057334ddf0541d75c0d38f821adf2f84489

Download Submit
C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
0dfe37f1a31df5a9cfc690dabf7764f3

SHA1
e36e29daeba0cdb6c9bddf82e80b4a1987b5b58b

SHA256
01ab0bcc6aaa0c16bb9b03110b46a2f39a6a755d9f1157fcc01b37f2cfc918ad

SHA512
86712d3dace929bcd53f0d9f400f695c81fa62fc4a0e79083c41d9469fe353428a0942f8e47db74e875e2c03a860b057334ddf0541d75c0d38f821adf2f84489

Download Submit
memory/1420-54-0x0000000000000000-mapping.dmp

Download
memory/1420-55-0x0000000076291000-0x0000000076293000-memory.dmp

Filesize
8KB

Download
memory/1892-56-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads