wannacry | 0ff6948dd36eb324ccc264f122d728f92814dccfb734b555cde28f9a63217c11

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 00:38

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General

Target

96c927e42636d10e5a2ee217e833bb19_JaffaCakes118.dll
Size

5.0MB
MD5

96c927e42636d10e5a2ee217e833bb19
SHA1

db390da6e675e11aa995fa87112d61239a80ca8a
SHA256

0ff6948dd36eb324ccc264f122d728f92814dccfb734b555cde28f9a63217c11
SHA512

813d5e9df5e6d9ca24ac422a587e0ba751da4d3ef238fc22fe628927be5df972d518f7ab0429681aab644a1100fc252b34df23014d6697125e40d4de01dd3f23
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5N3R8yAVp2H:+DqPe1Cxcxk3ZAEUadrR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3167) 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

2660 mssecsvc.exe
348 mssecsvc.exe
5112 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
2660	mssecsvc.exe
348	mssecsvc.exe
5112	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\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

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3892 wrote to memory of 3216	3892	rundll32.exe	rundll32.exe
PID 3892 wrote to memory of 3216	3892	rundll32.exe	rundll32.exe
PID 3892 wrote to memory of 3216	3892	rundll32.exe	rundll32.exe
PID 3216 wrote to memory of 2660	3216	rundll32.exe	mssecsvc.exe
PID 3216 wrote to memory of 2660	3216	rundll32.exe	mssecsvc.exe
PID 3216 wrote to memory of 2660	3216	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\96c927e42636d10e5a2ee217e833bb19_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3892

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\96c927e42636d10e5a2ee217e833bb19_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3216

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2660

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:5112

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:348

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
f45ea5d81267a5ffe25e128d0ade57c9

SHA1
82046dec901ab7cf8442797384e2c1808050d0f4

SHA256
ad222892c719fcdddc7ad0b3178305b084ad52737a4496baebc7d92d2df6e6e3

SHA512
b2cc7fca36b76e19481bbf0b6777598d1c9d34ebdc2090a011ce30353299d2f98b15428cffd7d3bd6d44cba79fb8fa30e4f65114507f49d338ed9f6c5f036bca

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
9e8d5f659c435f7a525008d1b5b133f0

SHA1
02380c2c5f1342e0c183960513801f3d4acd2d75

SHA256
b4324573ee7af3df8b20fb287839e785353fbc1ed7368dd6e38cb9e35e2fc052

SHA512
b4f78e8a208da8f0cffeaae4d6008dd6fad32acce866e0d27de7a0a18a2b60f2dc725b88f376cc8835ae9453d11927340b9a9d99f58a70cde6dbb133a8190829

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