wannacry | 6d9f61cac704ee88d56d181439e5cf269ae13fb26e1b153c8a7fdd031980c037

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
24-05-2024 02:31

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General

Target

6d10b8cb37ebcf0a6d22dbf3e67b310e_JaffaCakes118.dll
Size

5.0MB
MD5

6d10b8cb37ebcf0a6d22dbf3e67b310e
SHA1

244e9aa52c699a7e5af1d965d46caeb9ccaa9830
SHA256

6d9f61cac704ee88d56d181439e5cf269ae13fb26e1b153c8a7fdd031980c037
SHA512

2d926ed5b1ec4a268a978f98313cf3702784619e4902dde4be1fa16a408c799ee015590e8564825d0241bae307f94ac199b3ebd1b8cd3ffce9f3ab4b612ee7ab
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P5eR8yAVp2H:+DqPe1Cxcxk3ZAEUadgR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3362) 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

3468 mssecsvc.exe
3356 mssecsvc.exe
3900 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
3468	mssecsvc.exe
3356	mssecsvc.exe
3900	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 2156 wrote to memory of 1976	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 1976	2156	rundll32.exe	rundll32.exe
PID 2156 wrote to memory of 1976	2156	rundll32.exe	rundll32.exe
PID 1976 wrote to memory of 3468	1976	rundll32.exe	mssecsvc.exe
PID 1976 wrote to memory of 3468	1976	rundll32.exe	mssecsvc.exe
PID 1976 wrote to memory of 3468	1976	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6d10b8cb37ebcf0a6d22dbf3e67b310e_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2156

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6d10b8cb37ebcf0a6d22dbf3e67b310e_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1976

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3468

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:3900

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3356

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\WINDOWS\mssecsvc.exe
Filesize
3.6MB

MD5
13a2719d0bc35aa5d33c346644effcab

SHA1
6c8905965df55eab8cc6e8f76756092706f60666

SHA256
941f7bd9263aa5d0c1e11f534b151b37fc418a0a11c2237d0b8af04912e9777a

SHA512
98827942ab24be76db1d4cda8e2719a5c1e6fcc532002b76ce57a23c5c070515457a93c25ca5ad996fc894084217df8d752d1c0a2d2bb362a516be2a15c6e1bc

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
6d05b40e1de460136e3913543cd01611

SHA1
84c3b084e58a29f99ef7c58a4b9cb65afdcaf743

SHA256
7203c16d0d96f641af9b828b7bb503f89e8838402130b75e525de7703547c044

SHA512
17f547a1ba859066ed8606e54aaa37a553cbaddc42d8393cc0958e3fdd7e24f173ee9ab3387d6aa245c443139a1f5efdeee066cf05a240d6ba4cce4bcf5203ce

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