wannacry | 881b5dc7ccad8a17bb200aaa8ef58e65aa7c91dd810e8e12f251efc81fc52382

Analysis

max time kernel
150s
max time network
155s
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 09:56

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General

Target

83d14162294c12e6c5ba66b2b44e3584_JaffaCakes118.dll
Size

5.0MB
MD5

83d14162294c12e6c5ba66b2b44e3584
SHA1

e9611de14e29e503243ad1e2c57c0dde9cbf7bab
SHA256

881b5dc7ccad8a17bb200aaa8ef58e65aa7c91dd810e8e12f251efc81fc52382
SHA512

084fcd01347f63b78ed38122e05b13ddbfb91fd0cc1cbff3ea71fce18e762d2a30cd85eb7ed62eaaa9e4d0a8c4c4f706162dccfb55001446ec7f572b62b2a40a
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA3caEau3R8yAH1plAH:+DqPoBhz1aRxcSUDk36SA33R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3303) 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

4072 mssecsvc.exe
5108 mssecsvc.exe
3936 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
4072	mssecsvc.exe
5108	mssecsvc.exe
3936	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\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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 3856 wrote to memory of 4856	3856	rundll32.exe	rundll32.exe
PID 3856 wrote to memory of 4856	3856	rundll32.exe	rundll32.exe
PID 3856 wrote to memory of 4856	3856	rundll32.exe	rundll32.exe
PID 4856 wrote to memory of 4072	4856	rundll32.exe	mssecsvc.exe
PID 4856 wrote to memory of 4072	4856	rundll32.exe	mssecsvc.exe
PID 4856 wrote to memory of 4072	4856	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83d14162294c12e6c5ba66b2b44e3584_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3856

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83d14162294c12e6c5ba66b2b44e3584_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4856

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4072

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3936

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:5108

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 --field-trial-handle=4320,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=1324 /prefetch:8
1⤵
PID:3416

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
b9ce967f1754fe9d4ddd109759c59da8

SHA1
9f8f3f5954993e285ecefb49b2a554f2d59bc1ea

SHA256
7aaafa2b811c9f63ec5d36fadaa5c63519700eaea632fbb85ea6933cc4235664

SHA512
0ba4fb649000e5201d88527fcbdafcb3b69e8a52d66d67bebe211e52228064ef76632e1f2e2c07c9db4d9dca84216d0f7d3e09459d99c76ef4c85313215fd5e7

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
75f94f33a75b9774740b3208d57146fa

SHA1
bd3d712b1dc42f12608be5541ff979d109317178

SHA256
e6d0b13620c87bef0aeef2de5439d9df306cbc0c27bde286ad279349095307cc

SHA512
7a905fe861eb71067df2a895e8e88913da463eb1c0a6935fdbc179a36aed7bca38781fb9fef0db549c6f1c1941d59e11f7db54d1911159b7e96acfafbb9f0698

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