wannacry | ee9205e4251c7c338433ffcb9c866e2ed703c9b60c4573c53c9dd70f719dae8b

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
14-07-2024 10:38

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General

Target

45735a816370f26b06e053656ca7315d_JaffaCakes118.dll
Size

5.0MB
MD5

45735a816370f26b06e053656ca7315d
SHA1

6cb0add4b4726c5db5032398bfc47d508ed3343b
SHA256

ee9205e4251c7c338433ffcb9c866e2ed703c9b60c4573c53c9dd70f719dae8b
SHA512

56c58c30159a2b3a5d509fbacd608eb5e317757a84f87350f84e8fb791713129213a6cbb5e2b69aa47c9fb87576e5b70229c85ee7213cadcb97efd1a4787e98d
SSDEEP

98304:+DqPoBzz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqP41Cxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3108) 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
4472	mssecsvc.exe
3408	mssecsvc.exe
4228	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 4092	4856	rundll32.exe	83
PID 4856 wrote to memory of 4092	4856	rundll32.exe	83
PID 4856 wrote to memory of 4092	4856	rundll32.exe	83
PID 4092 wrote to memory of 4472	4092	rundll32.exe	86
PID 4092 wrote to memory of 4472	4092	rundll32.exe	86
PID 4092 wrote to memory of 4472	4092	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\45735a816370f26b06e053656ca7315d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\45735a816370f26b06e053656ca7315d_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4092
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4472
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4228

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3408

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
153ef357f607745c50ac7ccb3dd2b470

SHA1
b00f79087a6716e5ec4e73d8f0f6da4c291c610f

SHA256
bc7b4211757e1d265592b30f392091ade54177ba595d6d0a274cb60dcef915a1

SHA512
76979fcc42298fbbb04f7139d7c89b39dab593b05baaedfdf1e08cdec2183c640bbaaae468e9812bba77f1211361baae75d0b39dffb08e6abb9a730dee771077

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
f16bd5055704d1722e3649110bd2aa5b

SHA1
0d85e8dd395ddaa36fa5caaffb7bc4f54dcfb976

SHA256
3658bc1867a92cde42e753a1b29955eb84fb229b8b22e325136a0c4609f9ab9c

SHA512
7939b0d3b4404147bba49db5a24bf794ca6fbeb54ec4dad3b55ce0d6d17bdf033c358bc33f7ef5599524993a43106476b111a724ffb49363dce33b8a1cffe9cf

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