wannacry | 285a80c30114cd0759ce092586eb9d3ac5ebdeb01e2bdc062a74b7c0a9a6c45a

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 17:33

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General

Target
95b2c12e9afeaed5fbe056e49fc1eaaa_JaffaCakes118.dll
Size 5.0MB
Sample240604-v4wetsef93
SHA256 285a80c30114cd0759ce092586eb9d3ac5ebdeb01e2bdc062a74b7c0a9a6c45a
MD5 95b2c12e9afeaed5fbe056e49fc1eaaa
SHA1 223e0d98f84870b2a7d925b62eba5dcc64da6c82
SHA512 6404dca3869606d3f39a0997040320755094f4a6bc11c5d470cf444e3f3089037a8f89985788a68d39a52fa4aa7c6058b82618fc253604c1b585ffebfc8d00f5
SSDEEP 98304:+DqPoBhzBRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPefxcxk3ZAEUadzR8yc4H
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 (2821) 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
588	mssecsvc.exe
2292	mssecsvc.exe
3160	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 1940 wrote to memory of 1628	1940	rundll32.exe	81
PID 1940 wrote to memory of 1628	1940	rundll32.exe	81
PID 1940 wrote to memory of 1628	1940	rundll32.exe	81
PID 1628 wrote to memory of 588	1628	rundll32.exe	82
PID 1628 wrote to memory of 588	1628	rundll32.exe	82
PID 1628 wrote to memory of 588	1628	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\95b2c12e9afeaed5fbe056e49fc1eaaa_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1940
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\95b2c12e9afeaed5fbe056e49fc1eaaa_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1628
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:588
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:3160

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2292

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 82d4d7a9a740f3c56c3c71d6d65af9ffe80a7f0839bba5af4d27135a8d3b6609
MD5 a2a3e10eb73eff854be52d6647698f70
SHA1 f1162eb2213ef084bbc0e75a68e4654f2a0efed5
SHA512 63bfaea06170adc82919cc1be74254035b9dc317b3b8890a63a3622b533cbc8835bb3e0147748397da07cec657157f22b0a84ee676b80bad0d18232fbfe157bd
SSDEEP 98304:yDqPoBhzBRxcSUDk36SAEdhvxWa9P593R8yAVp2HI:yDqPefxcxk3ZAEUadzR8yc4HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 438603dde75732b4f81fc31bac2de414a8060601c34c517c5b99f3f180c989cc
MD5 a21d2a470b89d4c1916edd49e615e941
SHA1 b31f148803f88330c870659a7b9a173aa422baae
SHA512 2a928d33eb8e6d4849234a3c6ba0b7a2f12cdedef39fdc26c98ac532772eaf4f2448571afd345d0780cc5a666b7e77cbb5872defe8b89a00c2fc9650158e719d
SSDEEP 98304:QqPoBhzBRxcSUDk36SAEdhvxWa9P593R8yAVp2Hj:QqPefxcxk3ZAEUadzR8yc4Hj
MD5 SHA1 SHA512 SSDEEP