wannacry | 336122b459686f4dbb10d860c4224d7aea6161d4de9b94cad5a43793f44a5774

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
20-09-2024 05:57

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General

Target

ecf874f3dec4b878c266f1f79c6b782f_JaffaCakes118.dll
Size

5.0MB
MD5

ecf874f3dec4b878c266f1f79c6b782f
SHA1

83e08e4e744a3021701498829a6a6d16cdecaf91
SHA256

336122b459686f4dbb10d860c4224d7aea6161d4de9b94cad5a43793f44a5774
SHA512

99c1ac60af920f89b12a6d72e03b2bb688ebe2cfbb1f838103e4951afef58dc433cdc0f34d8e349c0e91e0e4fc066cac20cbe4bcd9ee5dc4610b0ef69cc043eb
SSDEEP

98304:+DqPoBhz1aRxcSUDkEQv9Snm1tnr7I593R8yAVp2H:+DqPe1CxcxkEQv9Snm1tnr7IzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3150) 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
4568	mssecsvc.exe
2728	mssecsvc.exe
4536	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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 4676 wrote to memory of 2136	4676	rundll32.exe	82
PID 4676 wrote to memory of 2136	4676	rundll32.exe	82
PID 4676 wrote to memory of 2136	4676	rundll32.exe	82
PID 2136 wrote to memory of 4568	2136	rundll32.exe	83
PID 2136 wrote to memory of 4568	2136	rundll32.exe	83
PID 2136 wrote to memory of 4568	2136	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ecf874f3dec4b878c266f1f79c6b782f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4676
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ecf874f3dec4b878c266f1f79c6b782f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4568
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4536

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:2728

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
a39bbd5df277ccaa4c4b3313ab521ae3

SHA1
a7216aa454b203cd0cf6ce7c9da276db19a12583

SHA256
d451244d05dd302813b76f0296242280f4afc241e6dfa511a86ee63ad834585b

SHA512
b074b4a46caa7cdcd67dfbe7d92daa201f562fa48f2de13716c3412be180301986a539573487fdae55f9b6143e907fbe5f701dc48aa4dd7aaa72493c947aa1df

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e365fbb7d6c0fa05bdf10470e1c50aca

SHA1
3f983ab41dc8631112ffe0e7e4532c301372d6d3

SHA256
64c098ded3d1dd72a78541f7b7228f2f051b4be9a5bb6d4a8fbce37a2ed37e1c

SHA512
8554a6373d1d3fcc16999370e6352478cf6fd1138726985c5fc24b9bf7a3be621353ded90f8e369bf44c241a7fba7bfdc8c7fe3ddaff3de98865f62cab84d6f1

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