wannacry | 991467da8144b1661411aaac090ad75c7f68c7277bfe43ec52537e03766d5605

Analysis

max time kernel
121s
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
09-05-2024 16:07

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General

Target

2ac49bb17e14808c9b89ff634f68c76c_JaffaCakes118.dll
Size

5.0MB
MD5

2ac49bb17e14808c9b89ff634f68c76c
SHA1

36ec6217088aead551a74574d3b17d5a96e22636
SHA256

991467da8144b1661411aaac090ad75c7f68c7277bfe43ec52537e03766d5605
SHA512

58057ede26e8f19b0ecb9bd2be102071896fcd3a2bc75c8b990371195d0074bc829efcc0175c45cb4a90082cd5d74a8cb3d8e4480ba559ee257a7c13cdcc4e4b
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0IRdhAdm7SdO6LLuYAMEcpcL7nEautETA:SnAQqMSPbcBVIRdhnmdAMEcaEaue

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3236) 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

1252 mssecsvc.exe
2420 mssecsvc.exe
796 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:

mssecsvc.exerundll32.exe

description ioc process

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

pid	process
1252	mssecsvc.exe
2420	mssecsvc.exe
796	tasksche.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4704 wrote to memory of 4628	4704	rundll32.exe	rundll32.exe
PID 4704 wrote to memory of 4628	4704	rundll32.exe	rundll32.exe
PID 4704 wrote to memory of 4628	4704	rundll32.exe	rundll32.exe
PID 4628 wrote to memory of 1252	4628	rundll32.exe	mssecsvc.exe
PID 4628 wrote to memory of 1252	4628	rundll32.exe	mssecsvc.exe
PID 4628 wrote to memory of 1252	4628	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2ac49bb17e14808c9b89ff634f68c76c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4704

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2ac49bb17e14808c9b89ff634f68c76c_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4628

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1252

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:796

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2420

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
3fc13f7056c4d897f7497a485e73123a

SHA1
23524c5b74e008769fd8b6d59902ecf23af54db5

SHA256
f783299151572aab278005770c83643fcea2bedc8c6e4d45c8da8a08585240b5

SHA512
00865597ee281cb88df3449d8cc165850a3b32f4b05f9f01a98b69dd8db8564ae73fe7f3f4bd65559d902e1662e81ee775b51a35579e7fe65a550bfb522e5003

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
7577dfb78dc6772bb71ef5b00974828e

SHA1
f4f61bbdf1963ee42908207784f722b7ec94efc8

SHA256
551b3b8cbe9d86e6042561461ccb86608dad651d0604ef5f6c3204f4c1698262

SHA512
2b20228adf5cd02762462cf41ac3835709574e82678badafb99aa40692ac4822e761562e963325f45957a074bdc448e77afa626d28219c1f87862a5697043f37

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