wannacry | 02e4a7ebf81840f41a3c8b5e330a37977b7783120ed12deca77d30825266810d

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
07/07/2024, 02:07

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General

Target
29a9dd686f08aacddacc43a0c57215f2_JaffaCakes118.dll
Size 5.0MB
Sample240707-ckfadstalc
SHA256 02e4a7ebf81840f41a3c8b5e330a37977b7783120ed12deca77d30825266810d
MD5 29a9dd686f08aacddacc43a0c57215f2
SHA1 3ed8902c24568adafc3ac35d9b4c92ba02406e8c
SHA512 28234611882e8facdb6feb0072d72d4c8790d57a2b5eba33074f914a0a04ee4d95f50a4c9038c04526db37b5678e5d53363fb3f0ea168e13d948aa950e0fc4d4
SSDEEP 12288:T1bLgmluCti62ybaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DuGEpGCsrp:RbLgurihdmMSirYbcMNgef0j6n
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 (2097) 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 2 IoCs

pid	Process
4796	mssecsvr.exe
4092	mssecsvr.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\mssecsvr.exe	rundll32.exe
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 4436	4952	rundll32.exe	82
PID 4952 wrote to memory of 4436	4952	rundll32.exe	82
PID 4952 wrote to memory of 4436	4952	rundll32.exe	82
PID 4436 wrote to memory of 4796	4436	rundll32.exe	84
PID 4436 wrote to memory of 4796	4436	rundll32.exe	84
PID 4436 wrote to memory of 4796	4436	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\29a9dd686f08aacddacc43a0c57215f2_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4952
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\29a9dd686f08aacddacc43a0c57215f2_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4436
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4796

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4092

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

Replay Monitor

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Downloads

mssecsvr.exe

Path C:\Windows\mssecsvr.exe
Size 2.2MB
SHA256 b8a9a06be3f08243eb994503369be36ed71701b28c07dd98d84ed8f434de0a6d
MD5 b304073942fba0ddb2c4e201e6a56afe
SHA1 3d11a91ce696461e97b21a138bed49004861df83
SHA512 d02d8eeecad65b2a118098373b2eda96de9d4c061cfda3aaccda91b272ab9b8b6de24b3a99cc4d7c61a34c879af5a3df08f6ce618441f9f27433eadccee9b088
SSDEEP 12288:e1bLgmluCti62ybaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DuGEpGCsrp:QbLgurihdmMSirYbcMNgef0j6n
MD5 SHA1 SHA512 SSDEEP

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