wannacry | 291e79ceced63d7f5261e133ae6f8956db51acaba0406c47979684595170c55a

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21/05/2024, 08:17

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General

Target
62a0aaca659062139dec2f9742995d8f_JaffaCakes118.dll
Size 5.0MB
Sample240521-j63fdaec23
SHA256 291e79ceced63d7f5261e133ae6f8956db51acaba0406c47979684595170c55a
MD5 62a0aaca659062139dec2f9742995d8f
SHA1 b8851c3d99ccc12dac0e106dec265db324c3f141
SHA512 81a13c083cb83a82de51cbc71f2b3f66e2a0b8797732cc36f4a6fff7f51188a7c365e4e80569981df8813a61999838639d7bf38149969d13194145b8034aebca
SSDEEP 98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:TDqPe1Cxcxk3ZAEUadzR8yc4
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 (3174) 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
2668	mssecsvc.exe
112	mssecsvc.exe
5048	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 5064 wrote to memory of 4524	5064	rundll32.exe	82
PID 5064 wrote to memory of 4524	5064	rundll32.exe	82
PID 5064 wrote to memory of 4524	5064	rundll32.exe	82
PID 4524 wrote to memory of 2668	4524	rundll32.exe	83
PID 4524 wrote to memory of 2668	4524	rundll32.exe	83
PID 4524 wrote to memory of 2668	4524	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\62a0aaca659062139dec2f9742995d8f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5064
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\62a0aaca659062139dec2f9742995d8f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4524
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2668
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5048

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:112

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 d972e80a36c7b5de43d9fc67328408e31fef54bfdf65a347a97cbf9f58721117
MD5 b2d1a374e0e0f925104fc873dad60860
SHA1 3568e1cb70800b6f90fb20baf7ab2001e74965f8
SHA512 cf2219cf964fd2053e7da65f4e547773a2977bb8de5d3362945c096124febb29b7d1003455ce90315f834c2a0940e17e2ddbe07dbc9cdb8a2b865e029ba0584b
SSDEEP 98304:XDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:XDqPe1Cxcxk3ZAEUadzR8yc4
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 a701ac320e17aea9bf5f74f063613eda241336a3ed534909c557395045ebca4d
MD5 a5947eeab8ebb06b7d52aa18af302bd8
SHA1 86d87502721c7524a429069fe1737887487b8ddb
SHA512 c8c38e0727c3aba179ec4234224cd16af334ad9ee822882249bc797b3cfe1c3892f84f68e6754f2dd36d61f8e4c4055c5c927b326f4a88c855b2ab61d297f0f4
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:QqPe1Cxcxk3ZAEUadzR8yc4
MD5 SHA1 SHA512 SSDEEP