wannacry | 3950179ee45f03af2d6c1130d0db04ad3441c2befc7fb5a28460d5fc45f1beb8

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
29-09-2024 00:55

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General

Target

fd7c451d538bde5e7f4c44f9adcd9f20_JaffaCakes118.dll
Size

5.0MB
MD5

fd7c451d538bde5e7f4c44f9adcd9f20
SHA1

52bca09f35d9c23bd96d5bbad1fd5e06a245190f
SHA256

3950179ee45f03af2d6c1130d0db04ad3441c2befc7fb5a28460d5fc45f1beb8
SHA512

fd2926b03f3680d2f9f05ed209c617f7e00069ee451e4bc2c1233dcf6d62f4f6bc414d3cd390fa9d66e814e1ab4364fa20ae0a58a4d496df7c07b250b43bcb0f
SSDEEP

24576:zbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIq:znAQqMSPbcBVQej/

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3279) 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
3344	mssecsvc.exe
4788	mssecsvc.exe
4592	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 2296 wrote to memory of 4972	2296	rundll32.exe	82
PID 2296 wrote to memory of 4972	2296	rundll32.exe	82
PID 2296 wrote to memory of 4972	2296	rundll32.exe	82
PID 4972 wrote to memory of 3344	4972	rundll32.exe	83
PID 4972 wrote to memory of 3344	4972	rundll32.exe	83
PID 4972 wrote to memory of 3344	4972	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fd7c451d538bde5e7f4c44f9adcd9f20_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fd7c451d538bde5e7f4c44f9adcd9f20_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4972
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3344
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4592

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:4788

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
323b926c93cc6130bbb006a7cfaba379

SHA1
d6af0736828aa426508a94d60a42dd5001a0c28b

SHA256
63406e40a2ba679eca83b3a127ff2af9a7a02402574a82801a4f739fc901e6cf

SHA512
a96e3d82146f4270e46077428933f15b84db1630eb8a44e42754860b13b30297e2fdaaca0a4934294da3a8fcd99cac0c6f36cb4816a0fc7c45c7d0b01b9a4b25

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
df02556b80331232a43186bc3fa582a3

SHA1
44f8c4fee2c22e8728cc65871f168d7365c01368

SHA256
48361f23788cc27891f05c2d45b8a0cd4dfe8e8a45f1654fdb2a913609a6a64d

SHA512
412b30722673cb07fc6497a176e4d25ab166c6462996f7f2905622617c080339a6f027db19fd0bab0e778ee72b64ef53c6f0e158b6a49d1abd7bf36916d1fe81

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