wannacry | b135b00a2fe9760f67568a7d7042448131cfb1d68d0623da3e63d08639acc8d7

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 12:16

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General

Target
2f0c3e5447dda6358a9aed014419101f_JaffaCakes118.dll
Size 5.0MB
Sample240510-pfgnwaha86
SHA256 b135b00a2fe9760f67568a7d7042448131cfb1d68d0623da3e63d08639acc8d7
MD5 2f0c3e5447dda6358a9aed014419101f
SHA1 731d4f6869ab6911325f06dea14792a1b110e65b
SHA512 de878ab90c071f57fa79d8e7f4d818007b7cb5012b6884104dd40e236d697806034048a284c4b29f01706f5a289d9de90ef276ce236c1f7313330c6c963c28cc
SSDEEP 98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593:TDqPe1Cxcxk3ZAEUadz
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 (3339) 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
3724	mssecsvc.exe
3456	mssecsvc.exe
3680	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

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 4284 wrote to memory of 1792	4284	rundll32.exe	83
PID 4284 wrote to memory of 1792	4284	rundll32.exe	83
PID 4284 wrote to memory of 1792	4284	rundll32.exe	83
PID 1792 wrote to memory of 3724	1792	rundll32.exe	84
PID 1792 wrote to memory of 3724	1792	rundll32.exe	84
PID 1792 wrote to memory of 3724	1792	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2f0c3e5447dda6358a9aed014419101f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4284
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\2f0c3e5447dda6358a9aed014419101f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3724
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3680

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3456

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 1d38146bb62ba9cd712e2e2b1270c3aa8b9b058e47ca5ea2676180bece29720d
MD5 ab4a6a12d1cf1fa709169bc8ba745ec3
SHA1 31d613941c3c423f84b0f4a42b5d9dceff48de80
SHA512 52f04f11024c342a26d387399f952d0a48806696fe48907c7a5e1382ebe5a06853f04238fff10e6533578df1d1c4a28d369d3cf273e3c392ca87ca32b224629a
SSDEEP 98304:XDqPoBhz1aRxcSUDk36SAEdhvxWa9P593:XDqPe1Cxcxk3ZAEUadz
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 fccecb609c53bf496d6ea5ce5a0b71ac8b44cd79d18542f34c3c2e9ff373c52d
MD5 51a89ab5f525c835119150ccf1941d63
SHA1 750308a2b4de02c48a8011e79831da0a0d8220ac
SHA512 ef510528aef360c79bfd1965a124c8b33bae15103e6aed4b8971005a99994fcb341f4c3b291c4580e7895171afdf3255f4a54094dfcd468cc3b8a9d34dc0fd75
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvxWa9P593K:QqPe1Cxcxk3ZAEUadzK
MD5 SHA1 SHA512 SSDEEP