wannacry | 115e716481945844a24a4c4e21cec431792bffcb2bb6a05728e829742ba9bcf6

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
20-08-2024 17:11

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General

Target

b01b4dbaeab5353347d09642c0454cef_JaffaCakes118.dll
Size

5.0MB
MD5

b01b4dbaeab5353347d09642c0454cef
SHA1

bb043b2adbdb267e4b526c6428cf5eef5111015c
SHA256

115e716481945844a24a4c4e21cec431792bffcb2bb6a05728e829742ba9bcf6
SHA512

e6483b7a2e65a7e9766ed2d2bee35d44bde6c3e917e26eb1b19e837730d9189f214c75765511a4db6b9d769f1edea7943ffe9d4b65b3159139f1be177b838c2c
SSDEEP

12288:yvbLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPM82900Ve7zw+K+DHeQYSUjEXFO:SbLgddQhfdmMSirYbcMNgef0QeQjG

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3169) 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
3352	mssecsvc.exe
4984	mssecsvc.exe
2016	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 4396 wrote to memory of 1680	4396	rundll32.exe	84
PID 4396 wrote to memory of 1680	4396	rundll32.exe	84
PID 4396 wrote to memory of 1680	4396	rundll32.exe	84
PID 1680 wrote to memory of 3352	1680	rundll32.exe	85
PID 1680 wrote to memory of 3352	1680	rundll32.exe	85
PID 1680 wrote to memory of 3352	1680	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b01b4dbaeab5353347d09642c0454cef_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4396
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b01b4dbaeab5353347d09642c0454cef_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1680
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3352
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2016

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:4984

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
a2882ae67399ca859277cffe04f10e18

SHA1
bcf6c6af164e1256c6ed0e09d11debf650b1298b

SHA256
38e92b0cef95213f72af2eefec010810580ffed19e2c77beaa5d3a52da4b5fc6

SHA512
2319f3cbc57b4aecb51c8940a12ad0785591507f19148a81a902a4ff1daac8d53acb730a55165332f08d7cdb1edd535531874708ae14d005bd50122f11db4e3d

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
e19f8cb58ceede7d421a4bd320109dea

SHA1
7ba8a6e8cde8242a25a0da60bdeca1f3ec0bf5e5

SHA256
6e1a97463dbcf36e2cd74678e7f2626f2516ecd0831ac2eaddd1fcaead58eea4

SHA512
3a0a52cf2367371bab0d3fee28ee4ac3da0b5621361455a4d6f76f252b26181222ae884782f333b1e4f825b6c1d1aaf0a9ab49a52a585672859546e58f076aea

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