wannacry | 529dad9429b7d3a12dec140fc790d7fe842c6b8cf4cdc3330deec6b94e050609

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
14-07-2024 06:44

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General

Target

44bc540ed22c83517ff5068ba58da383_JaffaCakes118.dll
Size

5.0MB
MD5

44bc540ed22c83517ff5068ba58da383
SHA1

f8c0d90a190912a004d540dc069fa39903b28c46
SHA256

529dad9429b7d3a12dec140fc790d7fe842c6b8cf4cdc3330deec6b94e050609
SHA512

8b61837e2d95b3b80500c530b00a11b32822b683dad71ab6e6ca65f679305113f5022e7b64892a6a6f36340abfe8f06607983315592cbf597b95f02aa63e853a
SSDEEP

49152:RnsQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:1/qPoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2123) 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
3856	mssecsvr.exe
3516	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 3848 wrote to memory of 2188	3848	rundll32.exe	84
PID 3848 wrote to memory of 2188	3848	rundll32.exe	84
PID 3848 wrote to memory of 2188	3848	rundll32.exe	84
PID 2188 wrote to memory of 3856	2188	rundll32.exe	85
PID 2188 wrote to memory of 3856	2188	rundll32.exe	85
PID 2188 wrote to memory of 3856	2188	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\44bc540ed22c83517ff5068ba58da383_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3848
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\44bc540ed22c83517ff5068ba58da383_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2188
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:3856

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3516

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

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
511f742c3d957b6423f3e8ae631bad1f

SHA1
0779ec9e6099c4b8dfeba237498deab700daef1f

SHA256
4914649b27682d6a1e8c4b1e7b5cdea7aed9d944c4b34b7c088de02856925e3b

SHA512
d5b77e2ac46a7b137664dbd26d81e28af5d0fd21674d1213ea0cd8bbab020f760d6f4c53612dab092521dff051399de732946d64407dee0d7b9c35b93e5b9936

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