wannacry | 92bc02116a72b13d359ba88e0984ea09d2eb230fbf711d92a0c961e08274a09e

Analysis

max time kernel
120s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
25-03-2024 07:09

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General

Target

ce223b231f2862124386c585e9b95ca1.dll
Size

5.0MB
MD5

ce223b231f2862124386c585e9b95ca1
SHA1

61673e2be7e3479a818eb98339692bc7e4a5b79c
SHA256

92bc02116a72b13d359ba88e0984ea09d2eb230fbf711d92a0c961e08274a09e
SHA512

dede42923cae7167fcff56ae1131e6cb5a9c8ef14d76d1be84211504685d628fa1abf658a7ec89d0bca976c35ef6eb58f93e4f59ffcc4c27468e3e44c0ac4faa
SSDEEP

12288:TQbLgmluyQhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DHeQYSUjEXF5:MbLguVQhfdmMSirYbcMNgef0QeQjG

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2482) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Executes dropped EXE 2 IoCs

Processes:

mssecsvr.exemssecsvr.exe

pid process

1116 mssecsvr.exe
2080 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

pid	process
1116	mssecsvr.exe
2080	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 5 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\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4500 wrote to memory of 1380	4500	rundll32.exe	rundll32.exe
PID 4500 wrote to memory of 1380	4500	rundll32.exe	rundll32.exe
PID 4500 wrote to memory of 1380	4500	rundll32.exe	rundll32.exe
PID 1380 wrote to memory of 1116	1380	rundll32.exe	mssecsvr.exe
PID 1380 wrote to memory of 1116	1380	rundll32.exe	mssecsvr.exe
PID 1380 wrote to memory of 1116	1380	rundll32.exe	mssecsvr.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ce223b231f2862124386c585e9b95ca1.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4500

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ce223b231f2862124386c585e9b95ca1.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1380

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1116

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
60a91a498c0f1ffddef484c5a4d42564

SHA1
a15dcd408c0aee1f5f38b50528583bdee6536227

SHA256
03dc66c9970481c5958d247f9eba93a6a7ad9f9bbf94845b9fbea8ed1e1e0757

SHA512
e7b7a308227fc3c72d8d1bd262389257e1f2fa419f6ceff58f73a06f850245f6e1068ea74cf42388ee2ca2712d7b5d9a2ce0e6f7264c3885b82c1caa70891e55

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