wannacry | 494d19f02baf2f2a9b6eb3de088c8911b8a11fac6c960850110313b46d3bfe96

General

Target

494d19f02baf2f2a9b6eb3de088c8911b8a11fac6c960850110313b46d3bfe96.dll
Size

5.0MB
MD5

87dc62e9d0c0e82a6f495204aa970a47
SHA1

9aad87c88e51124e25764d3bb5432262ee059a8a
SHA256

494d19f02baf2f2a9b6eb3de088c8911b8a11fac6c960850110313b46d3bfe96
SHA512

d47f2b03c4641825bf87bf91e02a9ff72b2a4b8777261d69291908085d92da57fd06768221093fa7f34d217a95088e4caac383907fe289698a80ca41771d6337

Score

10^/10

wannacry discovery ransomware suricata worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
suricata: ET MALWARE Known Sinkhole Response Kryptos Logic
suricata: ET MALWARE Known Sinkhole Response Kryptos Logic
suricata
suricata: ET MALWARE W32/WannaCry.Ransomware Killswitch Domain HTTP Request 1
suricata: ET MALWARE W32/WannaCry.Ransomware Killswitch Domain HTTP Request 1
suricata
Contacts a large (3325) 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 3 IoCs

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

4196 mssecsvc.exe
4340 mssecsvc.exe
1992 tasksche.exe
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Drops file in Windows directory 2 IoCs

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

pid	process
4196	mssecsvc.exe
4340	mssecsvc.exe
1992	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

mssecsvc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2796 wrote to memory of 4344	2796	rundll32.exe	rundll32.exe
PID 2796 wrote to memory of 4344	2796	rundll32.exe	rundll32.exe
PID 2796 wrote to memory of 4344	2796	rundll32.exe	rundll32.exe
PID 4344 wrote to memory of 4196	4344	rundll32.exe	mssecsvc.exe
PID 4344 wrote to memory of 4196	4344	rundll32.exe	mssecsvc.exe
PID 4344 wrote to memory of 4196	4344	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\494d19f02baf2f2a9b6eb3de088c8911b8a11fac6c960850110313b46d3bfe96.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2796

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\494d19f02baf2f2a9b6eb3de088c8911b8a11fac6c960850110313b46d3bfe96.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4344

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4196

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1992

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4340

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Scanning

2

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
cc3a70ecc0e296a07e7f38fe72665c25

SHA1
e0482f30e2c295f675721aaf1121059ef2db5da2

SHA256
d3d0109630f864fb3cc86763061a27f388bb245814cedc62cdc086eb7916d50d

SHA512
ec7622160b9e8ed218f305181fe19567882b3b02a6ec5ed6735f8ffb78832524833507f7ca95caeb236c02348d4e329f0c68d6e036cdd5ffc818be73f58603d7

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
cc3a70ecc0e296a07e7f38fe72665c25

SHA1
e0482f30e2c295f675721aaf1121059ef2db5da2

SHA256
d3d0109630f864fb3cc86763061a27f388bb245814cedc62cdc086eb7916d50d

SHA512
ec7622160b9e8ed218f305181fe19567882b3b02a6ec5ed6735f8ffb78832524833507f7ca95caeb236c02348d4e329f0c68d6e036cdd5ffc818be73f58603d7

Download Submit
C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
cc3a70ecc0e296a07e7f38fe72665c25

SHA1
e0482f30e2c295f675721aaf1121059ef2db5da2

SHA256
d3d0109630f864fb3cc86763061a27f388bb245814cedc62cdc086eb7916d50d

SHA512
ec7622160b9e8ed218f305181fe19567882b3b02a6ec5ed6735f8ffb78832524833507f7ca95caeb236c02348d4e329f0c68d6e036cdd5ffc818be73f58603d7

Download Submit
C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
0150f010140afdb31b7606baa110e0f8

SHA1
a0997d2fdc309ab6d3c115fae736225123128992

SHA256
b6e4c243f223148c33f102269ce48872584440bd3258bc435f9423f5e3b2c902

SHA512
47220fd350dab3983f18c5dd624ca8042c39a946365f7b49b3dac29e0b65f9bb63d7569a69fda5990b8e7acc5411115aaddec9f4cfcd94759d8a199e1f3fd4d7

Download Submit
memory/4196-131-0x0000000000000000-mapping.dmp

Download
memory/4344-130-0x0000000000000000-mapping.dmp

Download

Analysis

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