wannacry | f9c019ff5ea8cc534b8d9500e75bfd4e05f477222bbf2e7ece8b8ff24c4a4870

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 02:54

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General

Target

77adef81b91f5f3a660e5e4ad78db29b_JaffaCakes118.dll
Size

5.0MB
MD5

77adef81b91f5f3a660e5e4ad78db29b
SHA1

4cf6f088fa42c825193eab2987d6252ac9fd0e69
SHA256

f9c019ff5ea8cc534b8d9500e75bfd4e05f477222bbf2e7ece8b8ff24c4a4870
SHA512

d5d4a66ba8d2bbe3ae0d4297ebbf8d98ee89a12ce1082da964cbf36eced56ff269c5c2c832bac04ef645d39abee63f68289ed3f0ac534e2da8ea9e4820989d8c
SSDEEP

98304:+DqPoBhz1aRlSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPe1Clxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3220) 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 3 IoCs

pid	Process
4280	mssecsvc.exe
3532	mssecsvc.exe
2268	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 Discovery
T1046

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\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

description	pid	Process	procid_target
PID 2176 wrote to memory of 3152	2176	rundll32.exe	84
PID 2176 wrote to memory of 3152	2176	rundll32.exe	84
PID 2176 wrote to memory of 3152	2176	rundll32.exe	84
PID 3152 wrote to memory of 4280	3152	rundll32.exe	85
PID 3152 wrote to memory of 4280	3152	rundll32.exe	85
PID 3152 wrote to memory of 4280	3152	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\77adef81b91f5f3a660e5e4ad78db29b_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\77adef81b91f5f3a660e5e4ad78db29b_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:3152
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4280
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2268

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3532

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
ffe4f9452ccc8a14ea59e67286d32e45

SHA1
3338ba18e939fcc070203d92587cd4712abac1b4

SHA256
53757ebf3600724db8187cbb4ec0d1a92c03f95d774d1d3d0fb249fdae664034

SHA512
6d4296c890dfce14b39a0e77252aa43bb3da5df04cf6771ca4f342a2ab018aa54c6843d5398b4403f74bd837ea26260ccccc85a813cf496c5b5ca45b106c9d14

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e89700b6f79644dd0305ab5d062303e6

SHA1
117e3dfc5cf32cde6259a80c020e221fa46d867c

SHA256
7266f885014af6e279bf8c7f27896497e6e3ca8fcdd77e414ecf7b27b325ae04

SHA512
5a2241ba77e4313e64cc76a2ff18e2e369748a659a5a5f0a50a3eb8b57b8cf892c859882622eec75e9a2aed0fcddc2b83656b126a300bdd9f7c0c96de2a3c784

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