wannacry | 3c90f3c70795e8c99bb55c49ddb8180ec3261c615e8b8fc9c0b14a4e58cb51af

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 08:19

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General

Target

200388c26cb013ab659d7c77cfdc0b83_JaffaCakes118.dll
Size

5.0MB
MD5

200388c26cb013ab659d7c77cfdc0b83
SHA1

043143c6e15b1bbbfab1ad5516a0457205d3d913
SHA256

3c90f3c70795e8c99bb55c49ddb8180ec3261c615e8b8fc9c0b14a4e58cb51af
SHA512

b5b4112bfad9ac2fad3770088471a74332b2298cb6d7d4fb48e894cda7fd520ce8278c7c2f70e82ae6d748fa301b6f4ee8f82cf07af84be1d10a8f4ef807d146
SSDEEP

49152:SnAQqMSPbcBVQej/1oxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBhz1oxWa9P593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3318) 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
1808	mssecsvc.exe
3316	mssecsvc.exe
4448	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 388	2636	rundll32.exe	84
PID 2636 wrote to memory of 388	2636	rundll32.exe	84
PID 2636 wrote to memory of 388	2636	rundll32.exe	84
PID 388 wrote to memory of 1808	388	rundll32.exe	85
PID 388 wrote to memory of 1808	388	rundll32.exe	85
PID 388 wrote to memory of 1808	388	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\200388c26cb013ab659d7c77cfdc0b83_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\200388c26cb013ab659d7c77cfdc0b83_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:388
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:1808
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4448

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3316

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

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
77ea16b36102bf3b698299ebed64dbce

SHA1
53297e7aac45ac27d68e4170323ef02cb117384d

SHA256
bef31977a0c504261f9b67bf8dd09ffa6c7a8e4167da8f22cc51be757c5b832a

SHA512
20ffc5b41ac8701c561ffe10ca287cbd6b4eb2e838816761f34009cefdaf679c774177be4dc18b59baa06def72454ad99cda721f7d720f9344b3721fd7da0464

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
40bf8f3b18cd546fe6b8a6e50fdce2e4

SHA1
ce11d541947ce7d46c98d3c220e00bf6bbc9faa9

SHA256
e2eeb75402025a8cd8ee3a564d404f8fb8096feb44068e1df82445ae51b66185

SHA512
dfcbdb9f070edc7b9afdaa46e9002b000224fa1a54afafd28e11ade2227d13b495c4bea9f454505dba9b070adf6ba2f6fbba0396189ed11f569b3d0125333032

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