wannacry | 3ac4f7151e276bc60fae33fa70b847376551f1f486b46d16d8dc37c7bfcb99b1

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 18:07

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General

Target

c5762d667962eb4e7a3e6ded2a21df2a_JaffaCakes118.dll
Size

5.0MB
MD5

c5762d667962eb4e7a3e6ded2a21df2a
SHA1

f6cbfc5da1352eaf29b3142ea59b979ce0e1cfbc
SHA256

3ac4f7151e276bc60fae33fa70b847376551f1f486b46d16d8dc37c7bfcb99b1
SHA512

d00dbe7e81e10702d1670e4c6005cab812371eb39f1344e10f2046fccf21fdcb3951d0544228b9cb62a4dfcca4f920f59653e95d3e8b5ddbee042aef33eede57
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz66269Wo/OqAH1pNZtA0U:SnAQqMSPbcBVQej/1INRsW+FAH1plAH

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3172) 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
4712	mssecsvc.exe
4812	mssecsvc.exe
816	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
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 4656	4324	rundll32.exe	83
PID 4324 wrote to memory of 4656	4324	rundll32.exe	83
PID 4324 wrote to memory of 4656	4324	rundll32.exe	83
PID 4656 wrote to memory of 4712	4656	rundll32.exe	84
PID 4656 wrote to memory of 4712	4656	rundll32.exe	84
PID 4656 wrote to memory of 4712	4656	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c5762d667962eb4e7a3e6ded2a21df2a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c5762d667962eb4e7a3e6ded2a21df2a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4656
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4712
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:816

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:4812

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
2091b08927e31b717ec6cdf362f37562

SHA1
50d299ab2c87ba540b463b690de502e27c70a5f5

SHA256
7d7538b2d21e9b142e09914430f0100b647c9332bcbf9221f2ea383703ef1367

SHA512
7b4a379ece38941d4802298d2bb44c8900e7c7b8bd44f2f6a5a33cdf73f6a20e46d6a6aa77e0768db4cb4c3073d0e3bcbf330cab6bc76772b303073236f17dba

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
c3a5410c8016d4ff2c1b760d297ddfe9

SHA1
71e58d3c53e7abba02e7cd5b5ec17ac4caf674a7

SHA256
b506a06681d2c95f8223e4d77a197e8768e1139d84f9900bc2b6cb6b9cd1ca19

SHA512
81b211191c9ece5ed4ac63fdfb61c6ef6a90e2f5a316943294c4d10e92886463f6030f0fc9397857bf842a08012bc3973426b9f276508b9a17a080d0f84b673e

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