wannacry | 12a8c93f1b889d10a5ac519ded21daf7603e5bacaba08824cfb031f0093fbb58

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-09-2024 03:21

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General

Target

d78335ce9b23e38c18adb7a24eae0ead_JaffaCakes118.dll
Size

5.0MB
MD5

d78335ce9b23e38c18adb7a24eae0ead
SHA1

0b460ecab59ba978a8b7e2b83f773b38c09ebddb
SHA256

12a8c93f1b889d10a5ac519ded21daf7603e5bacaba08824cfb031f0093fbb58
SHA512

5cae3d6dd268f422f5627ae1402fc21eec95f71f31a5ea6ada7bd5a48da2504b6ee6586bb0895eeeec4de9bfa808167ff61fd99a6df939dd2343829b32e71eaa
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhv259Uc/YF:+DqPe1Cxcxk3ZAEKv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3305) 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
4800	mssecsvc.exe
3632	mssecsvc.exe
3896	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

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 1380	1728	rundll32.exe	83
PID 1728 wrote to memory of 1380	1728	rundll32.exe	83
PID 1728 wrote to memory of 1380	1728	rundll32.exe	83
PID 1380 wrote to memory of 4800	1380	rundll32.exe	85
PID 1380 wrote to memory of 4800	1380	rundll32.exe	85
PID 1380 wrote to memory of 4800	1380	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d78335ce9b23e38c18adb7a24eae0ead_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d78335ce9b23e38c18adb7a24eae0ead_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1380
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4800
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3896

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:3632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
29f56f075282ac454d41e8ccc86399de

SHA1
3ef1c72d42409761378acd45eb9c7dac0924e1bb

SHA256
30e6809016f411cd25fed048adef4ec4f728db6f75538518afd64c2dfc2dd0c4

SHA512
31e49197e3ca6cefdcc4a2c993deb8aa8f1ca0f281aaec24dde6d819afb7478160011088cae612a84f1b0446c456f95ccbfcfce1afcec7af364d465cf3770720

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ca216b53faaeee16b697ff9f100213fc

SHA1
7e719c5bda20c30f7438ce5671f77b10e5778aa2

SHA256
1f604790cfbc1aa422cf97628487a2d045677cc16e65383f6e08da2c82a8b8e7

SHA512
7bac424375e2a34c0d9591560f3326c94af1757eb60a64440d808a7369f6a2962bd5fad0a4f0e8952b91006d58a6d21c1023a12045bf2224cea02d924c585bb2

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