wannacry | 57358f77e1adcd0c2f26f8f83f16f4878f8ee808b6c62a0346ac51bafae27a4c

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
16-06-2024 15:35

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General

Target

b44224dc93972f90ffd34dd331d0c5ef_JaffaCakes118.dll
Size

5.0MB
MD5

b44224dc93972f90ffd34dd331d0c5ef
SHA1

595e01adc188e91ea52423af38785e7bea6a4776
SHA256

57358f77e1adcd0c2f26f8f83f16f4878f8ee808b6c62a0346ac51bafae27a4c
SHA512

d58cea4569e6dd4b08502fed01593d19106f5ef606b81b1f4ba5f939db360b09420ee9f93f227cc539566e75b511e21ebf809855cda5aa02a6287b30f1c865d6
SSDEEP

24576:SbLgddQhfdmMSirYbcMNgef0hASk+RdhAdmv1LJMfcH9PO6LLuYAME:SnAQqMSPbcBVhAARdhnvxJM0H9PAME

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2685) 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

632 mssecsvc.exe
3420 mssecsvc.exe
1052 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
632	mssecsvc.exe
3420	mssecsvc.exe
1052	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 4424 wrote to memory of 536	4424	rundll32.exe	rundll32.exe
PID 4424 wrote to memory of 536	4424	rundll32.exe	rundll32.exe
PID 4424 wrote to memory of 536	4424	rundll32.exe	rundll32.exe
PID 536 wrote to memory of 632	536	rundll32.exe	mssecsvc.exe
PID 536 wrote to memory of 632	536	rundll32.exe	mssecsvc.exe
PID 536 wrote to memory of 632	536	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b44224dc93972f90ffd34dd331d0c5ef_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4424

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b44224dc93972f90ffd34dd331d0c5ef_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:536

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:632

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:1052

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=4136,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4008 /prefetch:8
1⤵
PID:1064

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:3420

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
a33c0ed170e87c6ee6a55b16f85a1c42

SHA1
afd116a01be2c1493e08a3542bd1948ebeba099e

SHA256
8f1209fc66228953767e25ee6f85a106b3dc084452cb8fdea35cdda3bcef841f

SHA512
d9b846b253896302ca898c17ad425f9a792569f484f53ae76a714d54a739677663d1b9881fae1276b639b7591472ff7f5385cefc033a00bdad81f206a045c621

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
79315e93e1e587369c28c10c7440cdbb

SHA1
64dd3537307acc6c30590833b827ba92cf0b55b4

SHA256
6660203d539eb99172bd694ed2384aa2e43809ec1e9c8d43da08cf4b0edcab93

SHA512
775685a3c897a82c52209fa17e1390ba2cc1b6ed8d9f755233d2f2390e848fe581d9269663105e1c48323df2b26081d19c54bfa4ffc91bd559f4105ff3fbee49

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