wannacry | 3b622ad73a4d3996bec3f59411a2e1fbf55cfe8ac017c7f39c3229b4dc9cd75e

Analysis

max time kernel
150s
max time network
151s
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 06:47

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General

Target

83544683ea936a82697a465bdf6093e1_JaffaCakes118.dll
Size

5.0MB
MD5

83544683ea936a82697a465bdf6093e1
SHA1

1221e6db5631f38bcbfed6b700b046c8397791e8
SHA256

3b622ad73a4d3996bec3f59411a2e1fbf55cfe8ac017c7f39c3229b4dc9cd75e
SHA512

66dba311e3a75ea48851671f27dc5c9cef3ea200071efe406f287fc999c8dd4ea5ab31e644d9a3bfe54cca967599e13cc1d008cc35b4d8d420b9a66b27b79705
SSDEEP

49152:SnAQqMSPbcBVQej/37wSY88toex6jHaeCn:+DqPoBhz3y

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3278) 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

3168 mssecsvc.exe
1396 mssecsvc.exe
2704 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
3168	mssecsvc.exe
1396	mssecsvc.exe
2704	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 1140 wrote to memory of 2364	1140	rundll32.exe	rundll32.exe
PID 1140 wrote to memory of 2364	1140	rundll32.exe	rundll32.exe
PID 1140 wrote to memory of 2364	1140	rundll32.exe	rundll32.exe
PID 2364 wrote to memory of 3168	2364	rundll32.exe	mssecsvc.exe
PID 2364 wrote to memory of 3168	2364	rundll32.exe	mssecsvc.exe
PID 2364 wrote to memory of 3168	2364	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83544683ea936a82697a465bdf6093e1_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1140

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\83544683ea936a82697a465bdf6093e1_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2364

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:3168

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2704

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1396

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
98752da3c002acf3e754ef7c599ea300

SHA1
34c6f054da962e5b801fe8207dfc240f95486511

SHA256
558268c93771e36f7a4ed06929faa11a6aa22baddb34d5bed15a489d068d58ab

SHA512
bde95f1f22f03f18506392186dbcee6a5b8d11947be216b52ef6780f10f7b06fcd5f26f54ec69e1ddc8a6705a221478f5fe567289c0407177329b6a4542611a7

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
57be8666bb55d612117efd8cd1ed762a

SHA1
5684dd3216fc4e4534cd83d6bf6a5032a6b13577

SHA256
03066d388bd69e1f763021fd14c7b6088878875600a1de68e72281fe0c89768d

SHA512
cb7fc0dfe051ddf02051d2304f32a3e0f328cedb8646d68786e064b1e5a8635263b38a7f14eec77d91d5bf9c2544494d7a7a1297b0ed435d66911e2b2a870ff4

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