wannacry | dcb39eb8303e191e1bd95e6bd1aaf576f66c7db90e1ca4ee9133e8b66b1b0001

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
11/07/2024, 07:56

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General

Target
384bb8e3c6009c75472ef44706ddcfe0_JaffaCakes118.dll
Size 5.0MB
Sample240711-js2xpayhle
SHA256 dcb39eb8303e191e1bd95e6bd1aaf576f66c7db90e1ca4ee9133e8b66b1b0001
MD5 384bb8e3c6009c75472ef44706ddcfe0
SHA1 926802147c70c1853621d01a04f2f47e0d5b3669
SHA512 b0e54f06d2a9ae073831ecf55cda446b40adad97599f2f3a49cfb91812c1ad54a0d6660ee700b63e6da0deb7b8b534508a1892e7503171e9c9af45e00926379d
SSDEEP 49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA6:TDqPoBhz1aRxcSUDk36SAX
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 (3251) 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
4756	mssecsvc.exe
2280	mssecsvc.exe
4144	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 1016 wrote to memory of 4620	1016	rundll32.exe	83
PID 1016 wrote to memory of 4620	1016	rundll32.exe	83
PID 1016 wrote to memory of 4620	1016	rundll32.exe	83
PID 4620 wrote to memory of 4756	4620	rundll32.exe	86
PID 4620 wrote to memory of 4756	4620	rundll32.exe	86
PID 4620 wrote to memory of 4756	4620	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\384bb8e3c6009c75472ef44706ddcfe0_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1016
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\384bb8e3c6009c75472ef44706ddcfe0_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4620
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4756
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4144

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2280

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 305069f00300db09afba6260de0f588ce10de2c8f015bef0a10682c46431713a
MD5 43994b637c783ce46721df8f239dccda
SHA1 3c319ade0f7da6b341f7ef161bd9d2fdd5d679ef
SHA512 e7a162cc9dc71f2c1717ccb3738662438acd8a8d5dce3bb2e0b17a503af268145ff546cf154ed8087ff688ae51e346b59b15528f6427672a09919eb044f7351b
SSDEEP 49152:XnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA6I:XDqPoBhz1aRxcSUDk36SAXI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 d327d99d14bcd439ff7314bed102dfde82997ba223bb118d47bc548b637c6a55
MD5 cfb4f9435b8486b68c79eb512b87e4b5
SHA1 c093f2d1124422f286e0e960dfa93bddbcfc3bc7
SHA512 47ffa7c2eed5074ff42bd832947ca7f87dde393e4677a23c5cff2c969c92ec513d2df6eaba8a5014fccb9f80d52c05f6ba7cb9664f05bfd53f94b8291be3bad6
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA6j:QqPoBhz1aRxcSUDk36SAXj
MD5 SHA1 SHA512 SSDEEP