wannacry | a4bcdafc355b18a8284d808effda6f07556eccdb8e057a58e6a022ad6c59fb3b

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02-07-2024 20:08

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General

Target

a4bcdafc355b18a8284d808effda6f07556eccdb8e057a58e6a022ad6c59fb3b.dll
Size

5.0MB
MD5

9a2cf2f27f17af69be38bc38c9a976b6
SHA1

9b6d1038e67c1bd80fbff19d06d353a03975d3df
SHA256

a4bcdafc355b18a8284d808effda6f07556eccdb8e057a58e6a022ad6c59fb3b
SHA512

3134f0994d4e77c0e01f1998287d14d13db81a619d8fe64db6050cdfcde04bd20fc25858b1c81e01c1010664f01402d4b9705bceac700d7a9320228619f16026
SSDEEP

49152:Sny21INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEcaEau3RCgHAD:+y21aRxcSUDk36SAEdhvxWa9P593R

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2689) 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

pid	Process
4532	mssecsvc.exe
3360	mssecsvc.exe

Drops file in Windows directory 2 IoCs

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

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 2792	1120	rundll32.exe	80
PID 1120 wrote to memory of 2792	1120	rundll32.exe	80
PID 1120 wrote to memory of 2792	1120	rundll32.exe	80
PID 2792 wrote to memory of 4532	2792	rundll32.exe	81
PID 2792 wrote to memory of 4532	2792	rundll32.exe	81
PID 2792 wrote to memory of 4532	2792	rundll32.exe	81

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a4bcdafc355b18a8284d808effda6f07556eccdb8e057a58e6a022ad6c59fb3b.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a4bcdafc355b18a8284d808effda6f07556eccdb8e057a58e6a022ad6c59fb3b.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4532

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3360

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\mssecsvc.exe

Filesize
3.6MB

MD5
962443d2cfa12dd0aaa0761250ddcc82

SHA1
bc9d5e318b95e648d6a9da943c5e5a65c09f8931

SHA256
d2adfe9ec3e0e69549ed7a72e7f455d86790959a96367ae034f98b98ae7d40fd

SHA512
0e2527e4719ee3f8d4ad4f45a6b9c8fe5f469b6ecbbe79dd636394c968ec8f826200703d4ef0d25ead52d7e9d71b75ff06a2a6e4a3940541943fddfaba33cc1a

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