wannacry | 849f85bf8cae249229bca8d6905a0964eb29afa3bd4e53a804a6d38ebcc72b66

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31-05-2024 17:03

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General

Target

87b890c975572f72518ab865ade2dd8f_JaffaCakes118.dll
Size

5.0MB
MD5

87b890c975572f72518ab865ade2dd8f
SHA1

8153bb85ca45b30adb7b137eceb70c46375d459c
SHA256

849f85bf8cae249229bca8d6905a0964eb29afa3bd4e53a804a6d38ebcc72b66
SHA512

2e8030c56761ac51ca3cfa88d524f6befcc65f097fec287d77748a7c1088491a54775352037b43053b9a6e5710b491ceceec9e12839e15eac497715efc2b39f1
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3239) 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

4416 mssecsvc.exe
4336 mssecsvc.exe
1388 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
4416	mssecsvc.exe
4336	mssecsvc.exe
1388	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 3560 wrote to memory of 3264	3560	rundll32.exe	rundll32.exe
PID 3560 wrote to memory of 3264	3560	rundll32.exe	rundll32.exe
PID 3560 wrote to memory of 3264	3560	rundll32.exe	rundll32.exe
PID 3264 wrote to memory of 4416	3264	rundll32.exe	mssecsvc.exe
PID 3264 wrote to memory of 4416	3264	rundll32.exe	mssecsvc.exe
PID 3264 wrote to memory of 4416	3264	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\87b890c975572f72518ab865ade2dd8f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3560

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\87b890c975572f72518ab865ade2dd8f_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3264

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4416

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1388

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4336

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
96321353494537973f12b452610ce2c2

SHA1
67c6ad3a639b604ffafa5f4cdae17a356dc877c7

SHA256
aded3db2b8d39461e6b3b08cdbea36579996f761f698df6ae67b6934b207fd63

SHA512
3ebe713d50d84e0c07db98f04121dacb99349283a5ff0616288fc5b54331a12d6858839b7a5c62d1c7af8ae1beb821015422bfb1b673fc6a7bcf4b7397cba1bb

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
f9266eeae2d86ac2c8853e85fa83f96b

SHA1
be1ae794abe6f43746e5abbd1b7f1b82df3828fa

SHA256
37f87366d27fdb41e93b060fc13e9b3a09a1ddf8b05b59da7451173979754ffa

SHA512
0a3683c37eba386c644d1d655bcd11c115990eb5539497845a8e0f3ddd18935783cede0d892669d2b92b8b7cef5e94926591a55be2250468ca630a26657dbec9

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