wannacry | 6f282c0df25a61bef8bd83b317d7c9493b575717b691e30d63da8cb5ec898e7b

Analysis

max time kernel
150s
max time network
151s
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, 05:42

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General

Target

3e142c642b1d1e6a01ae319ccbe487a3_JaffaCakes118.dll
Size

5.0MB
MD5

3e142c642b1d1e6a01ae319ccbe487a3
SHA1

5653bf6e1613bfab68d6d05111b312ed0dceb448
SHA256

6f282c0df25a61bef8bd83b317d7c9493b575717b691e30d63da8cb5ec898e7b
SHA512

e1215c551e96f2f6e3b5266ef845853fb11e3699ae554bbbec51a8e4c6c91763df1242290dc167b129e96aa33665edd5d3d350d59479c1060f1837052e811640
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWaN3R8yAVp2H:TDqPe1Cxcxk3ZAEUaNR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3330) 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
2344	mssecsvc.exe
2640	mssecsvc.exe
5052	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\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 1936 wrote to memory of 2476	1936	rundll32.exe	81
PID 1936 wrote to memory of 2476	1936	rundll32.exe	81
PID 1936 wrote to memory of 2476	1936	rundll32.exe	81
PID 2476 wrote to memory of 2344	2476	rundll32.exe	82
PID 2476 wrote to memory of 2344	2476	rundll32.exe	82
PID 2476 wrote to memory of 2344	2476	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e142c642b1d1e6a01ae319ccbe487a3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e142c642b1d1e6a01ae319ccbe487a3_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:2476
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:2344
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:5052

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2640

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
7e8224b83706096a14573b5a1a411314

SHA1
89bf59ccdbde5de5d1eaeac797470afa6c19cfb6

SHA256
d8ad2b8c468d3262291f2a86a453a2fef3dbd0600faf85b4df7a3978140ef4b3

SHA512
895ac90515670a435482af2b3dd6d348c31443d4a1fef625c278936e3636875f7a315645d1b31670a938a4dbce34cb032f4acae7ab9f43910369d981ec510b2b

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
66705a0978e9146d15b753dd2293c2ef

SHA1
3e132c60046917618e080ea8e0d477ae91fd4d73

SHA256
547ed4d6e8392eebe30c2f755f529c1079bb17907d32a532261a1fe2dd1dc9c0

SHA512
6b9cde50b901c297b4d783bf23c59202c7a45d94f6cc2545575a8f374f43673534883ce627edc990d7b1cd14c4130b1a400624df1bde923896a535da0cb82e16

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