wannacry | a00b12e44cb4c3318330762c1e8ee9e2614867c4447b49b265a7634e4e852861

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/06/2024, 04:46

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General

Target
a80b33ae1ceefbf0d864b297761c85dd_JaffaCakes118.dll
Size 5.0MB
Sample240614-fd86nszbjp
SHA256 a00b12e44cb4c3318330762c1e8ee9e2614867c4447b49b265a7634e4e852861
MD5 a80b33ae1ceefbf0d864b297761c85dd
SHA1 39c8486ebd2bf7052c886f84d1fa6c4c3fc4f013
SHA512 fddc01dcd3d53abba313bf531a0ff39362c908047c6b043b5f11b212c8e7e94ae80f0889b5ffc6f3b1eb6f8371d4fc4657a01225ef13fc72937548672d08cf1a
SSDEEP 24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626:SnAQqMSPbcBVQej/1INR
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 (2682) 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
1952	mssecsvc.exe
1228	mssecsvc.exe
2776	tasksche.exe

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

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 2100 wrote to memory of 5064	2100	rundll32.exe	82
PID 2100 wrote to memory of 5064	2100	rundll32.exe	82
PID 2100 wrote to memory of 5064	2100	rundll32.exe	82
PID 5064 wrote to memory of 1952	5064	rundll32.exe	84
PID 5064 wrote to memory of 1952	5064	rundll32.exe	84
PID 5064 wrote to memory of 1952	5064	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a80b33ae1ceefbf0d864b297761c85dd_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a80b33ae1ceefbf0d864b297761c85dd_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:5064
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:1952
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2776

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 b0ab77621ba7362b29d29acd42f79e5a03748c3b0e73791e2a4f33b938e10279
MD5 466986e368d9ed44c708aae2c707578c
SHA1 462b6d41fd4d26fc0f87a91c553730a50efb9b62
SHA512 67dde24c20874dacb5d2c003096fba9c4f0e081ac0c578c6ecdbfbdb8c4fbd3aa2aae8d5da9238109af32b576c89fea17f5bba35cb9e3e8b10405f7c3b892024
SSDEEP 24576:2bLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626:2nAQqMSPbcBVQej/1INR
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 3f611d1e66c61213948d31e9e67c263cd87c24fbb8373d923bf6408b2ddaecf2
MD5 3cb84024a4143e76401de7b8c5e0fbf5
SHA1 e7a88ee92809a399cf6a0ddf0e363b9649e99614
SHA512 b0d732e436a1e7dd67bf47b02ff16272ce81defd83afb0edb595e3cbb76e801687d399950bf454b3a9fd6c77ebfe278e3a31dee59e5002859c2e06c280732b39
SSDEEP 24576:nQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626:nQqMSPbcBVQej/1INR
MD5 SHA1 SHA512 SSDEEP