wannacry | 56a84c68fdbbb62f8b30e56d144b6b4b9e352699983f135afb354fab64e25656

Analysis

max time kernel
150s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
15-06-2024 21:38

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General

Target

b038fe3b829caf3fe7859062d9162395_JaffaCakes118.dll
Size

5.0MB
MD5

b038fe3b829caf3fe7859062d9162395
SHA1

671f8f85a4cf4bb935c3106644f696d31058d36c
SHA256

56a84c68fdbbb62f8b30e56d144b6b4b9e352699983f135afb354fab64e25656
SHA512

d48f059a8c40c2a0faa7229a24c9b7ce31e0cd5f5da9972cad7579cb82154ec46bf6b1870a122a8871f2194a54ae5a8f55c784d02fd17723ae013d94ce2c3f90
SSDEEP

24576:zbLgddQhfdmMSirYbcMNgef0QeQ14kF2Y9g:znAQqMSPbcBVQe2dw

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3187) 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

2400 mssecsvc.exe
408 mssecsvc.exe
5024 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
2400	mssecsvc.exe
408	mssecsvc.exe
5024	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 468 wrote to memory of 1820	468	rundll32.exe	rundll32.exe
PID 468 wrote to memory of 1820	468	rundll32.exe	rundll32.exe
PID 468 wrote to memory of 1820	468	rundll32.exe	rundll32.exe
PID 1820 wrote to memory of 2400	1820	rundll32.exe	mssecsvc.exe
PID 1820 wrote to memory of 2400	1820	rundll32.exe	mssecsvc.exe
PID 1820 wrote to memory of 2400	1820	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b038fe3b829caf3fe7859062d9162395_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:468

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b038fe3b829caf3fe7859062d9162395_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1820

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2400

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:5024

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:408

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3744 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:5100

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

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
652a70bb771fbd710a174b9fcdbd5109

SHA1
bb1205e50bc6aee1d2ef17b8224b1dd3bf2ae455

SHA256
fac660b921cc10907653b48b44f81ef2074a899e0ac5b2c537185362a4cf0f18

SHA512
75bf75077c1e91dbbf20dcaad29eac25f0aa02e76be9468cb3d0ab77f3397f66a66a9de908879cada7203f5a0ab1b3ce717d9ca03ca3cf22ced475161fa3a77e

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
bc7fcce3ef434336c50d56a17ce7f80c

SHA1
3882f38175b0d7c6b1995d1e21282587393c17f2

SHA256
2ea82a2769c6f4c963a22ebbd2f9c6cfdd3b6dc7912c30c1b7ca1447c6b8c3bc

SHA512
d3149de4103f840d541d97c3825c1ee9b1fad65daa89d852292395c265c4b21fddd4b0820d2392c0bdac8d7395c53606bfda67332e37b5348e90e48dc492eb1a

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