wannacry | 2dfd4a11135512683f97ec40fb26bdb121bd5b27644b7d925b7e17aa75bac407

Resubmissions

14/05/2024, 18:40

240514-xbmnbsbb6910

14/05/2024, 18:24

240514-w2jhxsae6510

Analysis

max time kernel
1200s
max time network
1201s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 18:40

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General

Target
427c26ece5cc58787ae133d0c45b6cc8_JaffaCakes118.dll
Size 5.0MB
Sample240514-xbmnbsbb69
SHA256 2dfd4a11135512683f97ec40fb26bdb121bd5b27644b7d925b7e17aa75bac407
MD5 427c26ece5cc58787ae133d0c45b6cc8
SHA1 20ef4eb221b550905e6b7c04a0ae9e80c25e4546
SHA512 84585c3e1ba8c64e6b6f5b4d690215aeb61d4d9adc08a34fefae962677d611abde4173fb8d3665e1b58789b76fed9bd25468264f6fc4000c8356e51944085857
SSDEEP 49152:SnAQJGx+TSqTdX1HkQo6SAASxJM0H9PAMEcaEau3R8yAH1plAH:+DwxcSUDk36SA7xWa9P593R8yAVp2H
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 (26605) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
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

Executes dropped EXE 3 IoCs

pid	Process
4572	mssecsvc.exe
1928	mssecsvc.exe
4544	tasksche.exe

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\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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3764 wrote to memory of 1344	3764	rundll32.exe	81
PID 3764 wrote to memory of 1344	3764	rundll32.exe	81
PID 3764 wrote to memory of 1344	3764	rundll32.exe	81
PID 1344 wrote to memory of 4572	1344	rundll32.exe	82
PID 1344 wrote to memory of 4572	1344	rundll32.exe	82
PID 1344 wrote to memory of 4572	1344	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\427c26ece5cc58787ae133d0c45b6cc8_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3764
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\427c26ece5cc58787ae133d0c45b6cc8_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1344
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4572
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4544

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1928

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 133c67eb527809b01c5977c560949ec03c3fb5b87c8ed4bcd38c580c8bfdbd10
MD5 7b43d71dbfb4dc8eba0e3e2a010c5a31
SHA1 ebaca15297aa0a266c5ebf7f22f08891dc83903d
SHA512 dbff1d2971ffd81f1a3635b8dd6cbbc0543c4f0215f620bbdff04bbf984bf512a9891e177c14f19e5294455b25b1ca8548d532bd47971fb5eb578603ecc91349
SSDEEP 49152:2nAQJGx+TSqTdX1HkQo6SAASxJM0H9PAMEcaEau3R8yAH1plAHI:yDwxcSUDk36SA7xWa9P593R8yAVp2HI
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 dc3fe9a318d69f41e20f378fbd3368b8b7ce30cf1fa17f8d8318612acd24c80c
MD5 aa7f6c30c24531e82018968e7aaf8138
SHA1 1d0723bcd706cbc0ba7b4111b4d18d549ad7a8f7
SHA512 2a267267bfa44f74cda7e5f58d1c994381b290ac9c0a46ea8276f60db042fb50f7ba32352478910493a4318b2e8436e9468627d2704921a1203079d3fffce0c1
SSDEEP 49152:nQJGx+TSqTdX1HkQo6SAASxJM0H9PAMEcaEau3R8yAH1plAHj:QwxcSUDk36SA7xWa9P593R8yAVp2Hj
MD5 SHA1 SHA512 SSDEEP