wannacry | 27f7b4b45546af6c1b3fc3edf05bfe824b907b8a09751ede40d364790f87dabf

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
27-09-2024 08:50

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General

Target

fa17aae4f396459b7d591759d7aaf033_JaffaCakes118.dll
Size

5.0MB
MD5

fa17aae4f396459b7d591759d7aaf033
SHA1

dffab299632a5623bb931eff5bfc23c25d4fcbea
SHA256

27f7b4b45546af6c1b3fc3edf05bfe824b907b8a09751ede40d364790f87dabf
SHA512

f888cb03d586b8521211f3210ff4b4daba54d8bebb29eb87a82c479306f9838ff1ec75e5e2f78d914c6606793d93da26feb8203c9b50b3af29d94c8253fb92d2
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9PAMEc:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3157) 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
1700	mssecsvc.exe
4752	mssecsvc.exe
4876	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 1640 wrote to memory of 532	1640	rundll32.exe	82
PID 1640 wrote to memory of 532	1640	rundll32.exe	82
PID 1640 wrote to memory of 532	1640	rundll32.exe	82
PID 532 wrote to memory of 1700	532	rundll32.exe	83
PID 532 wrote to memory of 1700	532	rundll32.exe	83
PID 532 wrote to memory of 1700	532	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa17aae4f396459b7d591759d7aaf033_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa17aae4f396459b7d591759d7aaf033_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1700
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4876

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:4752

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
8b94c01d4ed92cddd2a98dca4d3cd83b

SHA1
fb2f71a3bca69a080e7d2497abed2c8285ec0f2f

SHA256
699fe9cfc6657e23448ffb95e785069371d748baed406e449c4cf6d5ff710aea

SHA512
af752a347c707272069391133a39a1174b768d5c9505fa5ccc4216e728f0f9da9ce8536cbfc8f5f037d35afe571dd6deaf47daf22c27d0f8f1b7a9ce8399eb9d

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
5782c5c239f03decfc8914a49d1a8e6e

SHA1
d9b7bc94d39da13d77a61faf0d51eb73e3bfafc2

SHA256
eeb6e79c4331d8595a5a030631d817d7ee83b8a21e091e210fadc96df9b53734

SHA512
89814c9ff80b751198a1ba1a835e08a46481a654ab2cd1fa354811a5536c7dc24db68ad1012d4f655119d345c5f92140c5d40f378232bb94e4bc3ac40ba99125

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