wannacry | b4f1d2ac45324ec816f0b5bc9ccfecb77324a312f48a36a3c71ae9477668a513

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
15/07/2024, 02:15

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General

Target
47cb345c8f7850274d485d98345b5ddd_JaffaCakes118.dll
Size 5.0MB
Sample240715-cplb7stbrl
SHA256 b4f1d2ac45324ec816f0b5bc9ccfecb77324a312f48a36a3c71ae9477668a513
MD5 47cb345c8f7850274d485d98345b5ddd
SHA1 c4f0e83f39030ed5c43041ac2edce7167859f6e6
SHA512 bd39caf1246fdac03387e7938944e66f82966f08969752a817f221486ec5c8a5f6a3b984407df2e2a108076eed5d939172a452bfc834bfd2a66014f04aa47634
SSDEEP 98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P53DIe2sDg2y8KMfd:+DqPe1Cxcxk3ZAEUadZDbVDzy8KI
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 (3239) 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
4908	mssecsvc.exe
1768	mssecsvc.exe
2840	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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvc.exe
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 4016	2040	rundll32.exe	83
PID 2040 wrote to memory of 4016	2040	rundll32.exe	83
PID 2040 wrote to memory of 4016	2040	rundll32.exe	83
PID 4016 wrote to memory of 4908	4016	rundll32.exe	86
PID 4016 wrote to memory of 4908	4016	rundll32.exe	86
PID 4016 wrote to memory of 4908	4016	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\47cb345c8f7850274d485d98345b5ddd_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\47cb345c8f7850274d485d98345b5ddd_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:4016
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4908
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2840

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1768

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 dbcdee0be0584c90b6d3d2dabb005c37ce49bab2d1538bba5462116b85df2140
MD5 5f672b3389fce030e9e42c858ad1c929
SHA1 8bf9dcffa097967793f4a8a7c628662f45125fd2
SHA512 5b7efa9189858ba46b1d0951a9eee49b77098c898929b439cb1dbd1be8bf41f0db61a3e57a74d87262f3aacd4e4d1f562194e804869f6d247a6466a700670442
SSDEEP 98304:yDqPoBhz1aRxcSUDk36SAEdhvxWa9P53DIe2sDg2y8KMfdn:yDqPe1Cxcxk3ZAEUadZDbVDzy8KIR
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 aa8b37af8e862ec6190b393ca1a968c0382b4673f1c8811ca1d8ebcb4f903959
MD5 42f0b341b5e17d4b0922f25e8073e4ab
SHA1 414ae46dc3a29aeef8f532c0f5e3849cd628d7b3
SHA512 618e179a1c793de111563304bd4bf9c8c50bbea5b2c96f381a81a46379ad66ca8ec0df9d0a4ff2a33659dd629ebab4c22a2c8af5d2b968d6eb02e0d519addad4
SSDEEP 98304:QqPoBhz1aRxcSUDk36SAEdhvxWa9P53DIe2sDg2y8KMfdm:QqPe1Cxcxk3ZAEUadZDbVDzy8KIo
MD5 SHA1 SHA512 SSDEEP