wannacry | 62f3dd302d3bd6deab2bfb3ff6d2597662042c28961526cabdefb199ee957709

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2024, 00:51

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General

Target

2781b339a38a964af7cad8d40f4ac14a_JaffaCakes118.dll
Size

5.0MB
MD5

2781b339a38a964af7cad8d40f4ac14a
SHA1

993ac8c2393980760da384108fd1048ec2c9deef
SHA256

62f3dd302d3bd6deab2bfb3ff6d2597662042c28961526cabdefb199ee957709
SHA512

214fdc1894516286b272e6e36fb4cc5b050e2ab5227e3d3835c3de6e02c361252e8738d07b4bece5f0ba1dbdcaf4647ed30da4dd0ba1f024119bf13966bb0392
SSDEEP

98304:+DqPoBhr1aRxcSUDk36SAEdhvxWa9P59l:+DqPW1Cxcxk3ZAEUadh

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3356) 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
3968	mssecsvc.exe
628	mssecsvc.exe
396	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 1760 wrote to memory of 1524	1760	rundll32.exe	82
PID 1760 wrote to memory of 1524	1760	rundll32.exe	82
PID 1760 wrote to memory of 1524	1760	rundll32.exe	82
PID 1524 wrote to memory of 3968	1524	rundll32.exe	83
PID 1524 wrote to memory of 3968	1524	rundll32.exe	83
PID 1524 wrote to memory of 3968	1524	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2781b339a38a964af7cad8d40f4ac14a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\2781b339a38a964af7cad8d40f4ac14a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3968
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:396

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:628

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
e67b714968043acffa41a02536befa5c

SHA1
1c67334baf6ba9c71df893653b66cddd8956b107

SHA256
1df0390eeae0edb6bc6d339985b990a64f969223d709c7b9d18999bff6eae866

SHA512
cedf72258c780b0748aa50c78228778ab306433ca3bddeb68f5b1e39fe3718898959d24c8abe42e1861858ca78367a0f82b532adc9ae3590d3afb80ef6b96807

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
8907528c79790bc30b44759b092c199f

SHA1
de4e34388793bf6bd125a5b8f40c241bcd38806e

SHA256
0f6e6252879c4b468c760d6c86b0fb504c14aacd0b7bd6b6b8a8b1bb9fe64650

SHA512
c04da6757423d3849972744c2d35337fb80e37e8d3e2a25887610f1b7f0927f54fbe5ba70d4279ee067a3690983bcb9852ae9e28f61f79b04a736e800b5484a5

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