wannacry | 8e5bf41f436878764cc05bdb5ab1c7ac29e872fd4d78f76b7300f3dc2687e7e1

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-10-2024 14:25

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General

Target

8e5bf41f436878764cc05bdb5ab1c7ac29e872fd4d78f76b7300f3dc2687e7e1N.dll
Size

5.0MB
MD5

a44d500e0c08668eb728971bce455d40
SHA1

3fdfe77edade5f801e21653de8d8ae8f8e5d5e11
SHA256

8e5bf41f436878764cc05bdb5ab1c7ac29e872fd4d78f76b7300f3dc2687e7e1
SHA512

f7aab4355b7eb85c77107779bc65a095729df47de684c25acabe030e2a5c4dc07d297f484954a13bf71a430432eeba180f1b882240c212e184bf1dfd376f36e5
SSDEEP

98304:TDqPoBhzbaRxcSUDk36SAEdhvxWa9P593R8yAVp2H:TDqPebCxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3304) 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
3968	mssecsvc.exe
1556	mssecsvc.exe
4776	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
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4520 wrote to memory of 2840	4520	rundll32.exe	84
PID 4520 wrote to memory of 2840	4520	rundll32.exe	84
PID 4520 wrote to memory of 2840	4520	rundll32.exe	84
PID 2840 wrote to memory of 3968	2840	rundll32.exe	85
PID 2840 wrote to memory of 3968	2840	rundll32.exe	85
PID 2840 wrote to memory of 3968	2840	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\8e5bf41f436878764cc05bdb5ab1c7ac29e872fd4d78f76b7300f3dc2687e7e1N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4520
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\8e5bf41f436878764cc05bdb5ab1c7ac29e872fd4d78f76b7300f3dc2687e7e1N.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2840
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3968
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4776

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:1556

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
e8119fe19f94f83f893fd1baf66a9356

SHA1
54ed77b1b77e62edfd6ae5491c0f51205046571a

SHA256
155513fbbf4792c55e106f849f1929991686492450d7576d433c476a21cce2e7

SHA512
7c6b7bedfca9eb35cc88d8778cf3beb05d9453c132d725ec773b4fa020926c623b9a0698f62d7c1e43e18026e7720a2e3356db7a1fc0e7d3669c1d3aa46b161e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
08dda7392bc30781c5427bd7168be6d3

SHA1
2589e917779a10284b1db712bcbdec8ed0da53d6

SHA256
919ef8007e54d0aa9b62265ff78172ae830c73c2a5490ef8933e8def00b22bd0

SHA512
004e34bacebc96b52cf3d990f3ebab29ae52bca65c77d7f15a0e3a959540442589719ea9947d20badd63d71024f25658dc358d10aed82bf5f34b11e53d1c1616

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