wannacry | 2375834bedd9f22ad5ab253ca9edfc87e864fd3c2e6292eccf7a39f30c1b8b53

Analysis

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

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2024 10:14

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General

Target

dffb92c0afe2eecda3ae8dc99f4fb5db_JaffaCakes118.dll
Size

5.0MB
MD5

dffb92c0afe2eecda3ae8dc99f4fb5db
SHA1

cec78b84ec2db7a72ac9e3014938f2e4bf956761
SHA256

2375834bedd9f22ad5ab253ca9edfc87e864fd3c2e6292eccf7a39f30c1b8b53
SHA512

7a798be9c773ba8699dc4e3ce6053850220582f12847d1d1403d97fc1632944ee76db083a9f88014061967d1f69853471356eb84bfe4dad5398091f3e90aa53d
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9d593R8yAVp2gC:TDqPe1Cxcxk3ZAEUarzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3225) 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
3380	mssecsvc.exe
4652	mssecsvc.exe
4844	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 3424 wrote to memory of 4792	3424	rundll32.exe	83
PID 3424 wrote to memory of 4792	3424	rundll32.exe	83
PID 3424 wrote to memory of 4792	3424	rundll32.exe	83
PID 4792 wrote to memory of 3380	4792	rundll32.exe	84
PID 4792 wrote to memory of 3380	4792	rundll32.exe	84
PID 4792 wrote to memory of 3380	4792	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\dffb92c0afe2eecda3ae8dc99f4fb5db_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3424
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\dffb92c0afe2eecda3ae8dc99f4fb5db_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4792
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3380
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4844

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:4652

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
fccf94aa84dcb7863d69593df73b65a8

SHA1
3ff8506fec3e6f798cf55b566c87f37cfd0524d4

SHA256
d27643502aa940f976c724f3001745cef35cfa444493bfad0f4c24b093183639

SHA512
24621abd89b64c35d58eb23eb4eea9e27808a70c3192c565e2d2174ed89529b1700befed92a493aa8057dae2e6215e75970228ffb4c1ceb78cce06096f888659

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
25b277bbd22f41feadde4d51c6919aa4

SHA1
00d0da1d933637af5f16f966312dff4ed0bd8f85

SHA256
194f866fea27893004f7e1f241928d0319597e8d666749b2d360f3fe97a3995b

SHA512
0cd34ae9b0e041f3c00023d50d211d255d286009986aaae0da1e8a5a98df12e9a15b1f3e1bedb6eef08c9995ecd1bf7afa92627bdec88f2bdea60b04539e3216

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