wannacry | 546ced084270416e021ce724e69a6ebcb663a4aa84374032febdb6179a8f58d7

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
06-05-2024 10:04

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General

Target

1bf8b8b561014a3ad69ace91474f1646_JaffaCakes118.dll
Size

5.0MB
MD5

1bf8b8b561014a3ad69ace91474f1646
SHA1

22f69b3a4e89651a4e99e5a896acfb91eaa73e11
SHA256

546ced084270416e021ce724e69a6ebcb663a4aa84374032febdb6179a8f58d7
SHA512

beb8fc131b215198c30e9fea409ef8a8f20d5d40ee5bd4618159d9633dfdd852d8dec0cd5aac6ebf513047f3c4733d2612c45a26a840e40da558d2eee920d1a1
SSDEEP

49152:SnAQqMSPbcBVarHV7Yo9AMEcaEau3R8yAH1plA:+DqPoB2Yo9593R8yAVp2

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3181) 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

4784 mssecsvc.exe
956 mssecsvc.exe
3868 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
4784	mssecsvc.exe
956	mssecsvc.exe
3868	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 4020 wrote to memory of 4556	4020	rundll32.exe	rundll32.exe
PID 4020 wrote to memory of 4556	4020	rundll32.exe	rundll32.exe
PID 4020 wrote to memory of 4556	4020	rundll32.exe	rundll32.exe
PID 4556 wrote to memory of 4784	4556	rundll32.exe	mssecsvc.exe
PID 4556 wrote to memory of 4784	4556	rundll32.exe	mssecsvc.exe
PID 4556 wrote to memory of 4784	4556	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1bf8b8b561014a3ad69ace91474f1646_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4020

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\1bf8b8b561014a3ad69ace91474f1646_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4556

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:4784

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3868

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:956

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
21bc29f9f7e1b024bd83c747f64f2202

SHA1
3b8b1629598c44a985e0cc37e2ef215ac132d530

SHA256
5d0371696e32ccf413c4330139b169d933318f3ac46a5798f84ac71ff95a4737

SHA512
56469048aa56b47b40cb7d24d7023edc9ac5effd1ccd4c392cbc4a807fb6a87e34e33a15712144b5266a7640ac4ab4237a352a04476a7a04ffc15a9c64edc32e

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
c5eb2b63bd2453b9acb1040a1af2b2e6

SHA1
c3ee70b9caa0cf4c9813c87b2c7e4f288a90dbdf

SHA256
f55d644951b2bacb530dd48a7bd74f2e33afc8a870b1dd1f01cb4d0fd30d6fe1

SHA512
4cd8ba3fa4e81434c1d2ea5422befbddc2d98f6750f020490aaed9bcdda827f68de0d2f9abc17e43f1e00826c6d35c04558e8ed60d04536b0400199da120c48f

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