wannacry | cfa4f9d141d4f51d9a6199e82f8fdaf921139f044921e4237db5ed3065fdb483

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
30-05-2024 05:26

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General

Target

83290a02ed59eab7505161293eaa21cf_JaffaCakes118.dll
Size

5.0MB
MD5

83290a02ed59eab7505161293eaa21cf
SHA1

bf11b2130480f2360d5f37e791ddeac3200b66ab
SHA256

cfa4f9d141d4f51d9a6199e82f8fdaf921139f044921e4237db5ed3065fdb483
SHA512

98790099258ca5b4b48e8b0b30f6663002b778971cff885991ee94d5a064e638e9a1a97e04491215000c5b929808d7394556f89a6701f4b947fcc60cfc3a4e9d
SSDEEP

49152:znAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnvxJM0H9:TDqPoBhz1aRxcSUDk36SAEdhvxWa9

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3060) 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

1180 mssecsvc.exe
3736 mssecsvc.exe
2800 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
1180	mssecsvc.exe
3736	mssecsvc.exe
2800	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 3632 wrote to memory of 964	3632	rundll32.exe	rundll32.exe
PID 3632 wrote to memory of 964	3632	rundll32.exe	rundll32.exe
PID 3632 wrote to memory of 964	3632	rundll32.exe	rundll32.exe
PID 964 wrote to memory of 1180	964	rundll32.exe	mssecsvc.exe
PID 964 wrote to memory of 1180	964	rundll32.exe	mssecsvc.exe
PID 964 wrote to memory of 1180	964	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83290a02ed59eab7505161293eaa21cf_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3632

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83290a02ed59eab7505161293eaa21cf_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:964

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1180

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2800

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3736

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
1776c7405b200c6913931dd6dde9d78d

SHA1
4f09cc3df6eff3cd86f197ddf044b2eadb8fd402

SHA256
824c2101052d0232bc409fbbf3431843ad3674a2979a8f8738adc41fb871769b

SHA512
8622c8b5e156f3113669ce613a7c8500eb30f77fe2d3125f0f4e8622813be1fb5748e4f70c5d1c04bffe3e50260c4de730971549226823f6571e08113ff80edf

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
c094b2ec6a7e98d0935fe97127646cb3

SHA1
562dc9932e3c9c2a72fedeca0b209f8c43d248bf

SHA256
e34de00b79e25fa85c52572eb869ede4c9000e18a5d05b40a17adb483aa55be3

SHA512
1c74e09636fceadf304ebfab0170c0943c53d1ddfa70848ba1cf93b29dfbf0a10dc7ab256bde64941a57960344e42ee063a4f2550543eafa5c579efeeaa11bf2

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