wannacry | 153929445ac39d8a8c9282d2117490af0a0e59acc5ba028d468f2c7cbaf87774

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09-05-2024 03:40

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General

Target

2822247ae20305e9fef73497b61faf7c_JaffaCakes118.dll
Size

5.0MB
MD5

2822247ae20305e9fef73497b61faf7c
SHA1

88f31096f6ca717d0d8e359cdf6f23f022027f74
SHA256

153929445ac39d8a8c9282d2117490af0a0e59acc5ba028d468f2c7cbaf87774
SHA512

97e1f6f7a5e77365f5c071f2245f000baee54bad6c01300cc587234034052520597e41cadd759287591411814447b1ef6dbeca783b63bf8f8bb0ecc26747caed
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9vyAVp2H:+DqPe1Cxcxk3ZAEUalyc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3024) 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

4776 mssecsvc.exe
4576 mssecsvc.exe
1292 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
4776	mssecsvc.exe
4576	mssecsvc.exe
1292	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\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 440 wrote to memory of 4840	440	rundll32.exe	rundll32.exe
PID 440 wrote to memory of 4840	440	rundll32.exe	rundll32.exe
PID 440 wrote to memory of 4840	440	rundll32.exe	rundll32.exe
PID 4840 wrote to memory of 4776	4840	rundll32.exe	mssecsvc.exe
PID 4840 wrote to memory of 4776	4840	rundll32.exe	mssecsvc.exe
PID 4840 wrote to memory of 4776	4840	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2822247ae20305e9fef73497b61faf7c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:440

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\2822247ae20305e9fef73497b61faf7c_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4840

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4776

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1292

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:4576

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=1408 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:1252

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
1a9da360084e5fe33cc8b7b01048386d

SHA1
57e10d009b4df796682803e6a026d70d418790da

SHA256
cb3e98be30579f7287ecb4a703a5defdd4035861d1c90e49f173fe037b728c5f

SHA512
77cf7339672e73d18e5ac36f20809edf0604e9406037fcb0be6e78fe2fd1995c96009edd4d443f744f1af3c0ce295a56614659ebe69bf97783fe1d0bf1bb7c7b

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
3854d17d30461c44c283d2e087d97723

SHA1
08dd80b6a4f8df08f4fd83d9304a515a68f40a8b

SHA256
0e84529bcb4899c94283f1698b7babd016fe26f3d0449f448bc5d32e78b55be8

SHA512
63c8a702ab3b4242c1d5ef9de3ae994e5dfd0e225b483fcff52481b34a04374056ed3db695ca3574ec56f20c605b7e7ccc40ea273d460da99cc72f8b09267484

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