wannacry | 3cf245c76d050ff09af32a5b290a3c9d9565dda8265d21df0685397a53074e38

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 06:48

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General

Target

97655b6c1416fed6149fbb57992635a3_JaffaCakes118.dll
Size

5.0MB
MD5

97655b6c1416fed6149fbb57992635a3
SHA1

0a643d40db33634e38f05c4f8138665baa2bb513
SHA256

3cf245c76d050ff09af32a5b290a3c9d9565dda8265d21df0685397a53074e38
SHA512

0a3b9363a97ba46ba7e1c3c358c88e886c299c821ea7279014e51367bc0f6a78913d0eb8f2b49739610475e96cad6dcdeecc92f91308b404785f11f66717b21c
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0QeQjG/D8kIqRYoAdNLKz6626/v1rqMt/8uME7A4C:SnAQqMSPbcBVQej/1INRovB3R8

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3321) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid process

2512 mssecsvc.exe
3216 mssecsvc.exe
2648 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

Processes:

rundll32.exemssecsvc.exe

description ioc process

File created C:\WINDOWS\mssecsvc.exe rundll32.exe
File created C:\WINDOWS\tasksche.exe mssecsvc.exe

pid	process
2512	mssecsvc.exe
3216	mssecsvc.exe
2648	tasksche.exe

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

Processes:

mssecsvc.exe

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

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 808 wrote to memory of 4984	808	rundll32.exe	rundll32.exe
PID 808 wrote to memory of 4984	808	rundll32.exe	rundll32.exe
PID 808 wrote to memory of 4984	808	rundll32.exe	rundll32.exe
PID 4984 wrote to memory of 2512	4984	rundll32.exe	mssecsvc.exe
PID 4984 wrote to memory of 2512	4984	rundll32.exe	mssecsvc.exe
PID 4984 wrote to memory of 2512	4984	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\97655b6c1416fed6149fbb57992635a3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:808

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\97655b6c1416fed6149fbb57992635a3_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4984

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2512

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2648

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3216

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

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
94dd7786e9186a0448cb7d2a90cb987e

SHA1
a1a31c02c43676a2d16edd68c7ad681a4d20271c

SHA256
179ed5a281e356dc2d0fab485b5427942e8c6ce1d7435c49bcf704b4b855dcad

SHA512
51cd7024c61c72c44072d51c040ccfc02a02c019ef91287e5939047166d46693cb52d37757cbe7d493429398c3cc7546cc09b9c2afe30d7b7430dba679f7b9d6

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
54e9ae14fec1f46cc3cd61b0df41291c

SHA1
9e6d6bcdce3ff409185aa0c4a77358a6b472e90d

SHA256
ef232df62ebca1d9f5b04a8af1f7637053f82dc8d340ea9193bd9b28f1b2ef82

SHA512
a0cc2e34be634efeca7b827242f5179ce698011fb2b99b049d670625b6f4ae753ce10c6d2cd59cb3a84bd81ca890e86273a9a78b130af86ebcd6e03fe4764344

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