wannacry | 2265ebb7935691bf627c6e0d23d95b43400ef549409216a8cba4f2885a29c67c

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
17-05-2024 16:50

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General

Target

507f2fa6d27d5a03234adf269e9ab90d_JaffaCakes118.dll
Size

5.0MB
MD5

507f2fa6d27d5a03234adf269e9ab90d
SHA1

b18c4f4b9fb02d1c174ff892bcb842ccbf71f00a
SHA256

2265ebb7935691bf627c6e0d23d95b43400ef549409216a8cba4f2885a29c67c
SHA512

7af0e464d9a9d201fab18f15a0714da804e80bbe029f80729b14740dd05f3be5393d2cde75974b0df93984fab5950494db52e951513064b07920fe33f1e8adc6
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8y42:TDqPe1Cxcxk3ZAEUadzR8y3

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3270) 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

548 mssecsvc.exe
2584 mssecsvc.exe
1520 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
548	mssecsvc.exe
2584	mssecsvc.exe
1520	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
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

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4068 wrote to memory of 3224	4068	rundll32.exe	rundll32.exe
PID 4068 wrote to memory of 3224	4068	rundll32.exe	rundll32.exe
PID 4068 wrote to memory of 3224	4068	rundll32.exe	rundll32.exe
PID 3224 wrote to memory of 548	3224	rundll32.exe	mssecsvc.exe
PID 3224 wrote to memory of 548	3224	rundll32.exe	mssecsvc.exe
PID 3224 wrote to memory of 548	3224	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\507f2fa6d27d5a03234adf269e9ab90d_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4068

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\507f2fa6d27d5a03234adf269e9ab90d_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3224

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:548

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1520

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2584

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
c7ca832ee769a29defbe66e5798a896b

SHA1
1e310e8d36220063338f1a51bab7c4e306429818

SHA256
c5f17382cf943bee060cdd62c6b2bc22811d2878d4f125a8655675c1ef52a8fc

SHA512
a5796f861f2e4f4efe021ce471bef48983fa1045fc046124515eb021e814e8fd9e03855f6e951272f2ff70d961feb58dd305346972c2b91aaca86a63382767a7

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
1c1c7c7dde876d6a59c343e63edef566

SHA1
d2ca52ef0f8b21b68c4949f0d53155182b55e38d

SHA256
edfb91543fe1e2dd3b8d7f09abb05515f697310dc7536cf86b4b8666be3efcf5

SHA512
da17e34b39a7231168224e7d944d3a9b9289b07f6d116645c959e7d692e3ac45f235ad26be2ab62d6391f4f746f2d21f345e2b17f1b625a640a95e55a6ddd3d8

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