wannacry | 70b3ec5075e19af0268511d678b08543fe3de151d1d0a5d48fd4ae7254000acf

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
15/08/2024, 15:48

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General

Target
9aa42e3fba9d860fd23c3dc54cf65d0b_JaffaCakes118.dll
Size 5.0MB
Sample240815-s8vyravalp
SHA256 70b3ec5075e19af0268511d678b08543fe3de151d1d0a5d48fd4ae7254000acf
MD5 9aa42e3fba9d860fd23c3dc54cf65d0b
SHA1 9f3f0fb62e637becd3e275488a5de4859a8291da
SHA512 5e0cae37f7aba85027c13851b2716e774d4f9b0ee78ca06e3feb048bdfb99910e0c9ccc9429a3ff59f21bd915c99f21ba0f620b7a67ddba96381de1e88f4cbd9
SSDEEP 24576:SbLgddQhfdmMSirYbcMNgef0aEaut/8uME7A4kqAH1pNZtA0p+9XEk:SnAQqMSPbcBVaEau3R8yAH1plAH
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3189) 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
1832	mssecsvc.exe
4788	mssecsvc.exe
1292	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 1792 wrote to memory of 5032	1792	rundll32.exe	84
PID 1792 wrote to memory of 5032	1792	rundll32.exe	84
PID 1792 wrote to memory of 5032	1792	rundll32.exe	84
PID 5032 wrote to memory of 1832	5032	rundll32.exe	85
PID 5032 wrote to memory of 1832	5032	rundll32.exe	85
PID 5032 wrote to memory of 1832	5032	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\9aa42e3fba9d860fd23c3dc54cf65d0b_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\9aa42e3fba9d860fd23c3dc54cf65d0b_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5032
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1832
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1292

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 5a28c3c4f968bceeee332d8ed4541c5d1c9da03ee7561eda4128727afe1be6e3
MD5 e5d1c3b34c5fa1ae6b90d08b426931c9
SHA1 44d64748f60e1a9c61530969070bcea5b3fe0707
SHA512 ac71ed61bd29be16611702c403f4a3cd694693bee077918b20a7e70c6460291718c59c6f9b5fd868c5d5b3b98842fcfd799e26c1071dacf7d24209f21fe288c4
SSDEEP 24576:2bLgddQhfdmMSirYbcMNgef0aEaut/8uME7A4kqAH1pNZtA0p+9XEkI:2nAQqMSPbcBVaEau3R8yAH1plAHI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 13863a87bd97603a0264a54d80215cac6f7a0793d97d324c14eef5b13e8cfa51
MD5 15762976a59f2f89078b97fcf77d2633
SHA1 30292f8d27c657dd061866a18527918c884ef3e5
SHA512 dce1430ee138d23b75bba664bf2561cdf7dd6af2cf6925b14a41bd2ba52f6ab1bc6816bfb346662a404948962d21e400ee06dfe2ad95121a55b66aa4b6b995ae
SSDEEP 24576:nQhfdmMSirYbcMNgef0aEaut/8uME7A4kqAH1pNZtA0p+9XEkj:nQqMSPbcBVaEau3R8yAH1plAHj
MD5 SHA1 SHA512 SSDEEP