wannacry | cf0baf64cab66f58b487621492d757ba5353f870c7c6c3d82e39f51886f2eb4e

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
11-05-2024 03:51

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General

Target

329337cbd4fbb25d3b9eb8098a05fbea_JaffaCakes118.dll
Size

5.0MB
MD5

329337cbd4fbb25d3b9eb8098a05fbea
SHA1

8eb1968de87d07137bb18d874ef8122c76955ec3
SHA256

cf0baf64cab66f58b487621492d757ba5353f870c7c6c3d82e39f51886f2eb4e
SHA512

9b598870b45d89c4b04efffdecfc78d1e64314ec1f17be27530a2e96404ced651f35ac02425eb824918572a6382a93a806f3b136a44b7d84d95f9fa7d114a87e
SSDEEP

49152:JnjQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAAIaEau3R8yAH1plAH:d8qPoBhz1aRxcSUDk36SAf3R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3309) 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

2176 mssecsvc.exe
2496 mssecsvc.exe
2364 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

pid	process
2176	mssecsvc.exe
2496	mssecsvc.exe
2364	tasksche.exe

Drops file in System32 directory 1 IoCs

Processes:

mssecsvc.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

Drops file in Windows directory 2 IoCs

Processes:

mssecsvc.exerundll32.exe

description ioc process

File created C:\WINDOWS\tasksche.exe mssecsvc.exe
File created C:\WINDOWS\mssecsvc.exe rundll32.exe
Modifies data under HKEY_USERS 1 IoCs

Processes:

mssecsvc.exe

description ioc process

Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings mssecsvc.exe

description	ioc	process
File created	C:\WINDOWS\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.exe	rundll32.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 2108	2204	rundll32.exe	rundll32.exe
PID 2108 wrote to memory of 2176	2108	rundll32.exe	mssecsvc.exe
PID 2108 wrote to memory of 2176	2108	rundll32.exe	mssecsvc.exe
PID 2108 wrote to memory of 2176	2108	rundll32.exe	mssecsvc.exe
PID 2108 wrote to memory of 2176	2108	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\329337cbd4fbb25d3b9eb8098a05fbea_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2204

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\329337cbd4fbb25d3b9eb8098a05fbea_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2108

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:2176

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2364

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:2496

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
0c95bfc10ee2fb1e0081c3b87e6e120f

SHA1
1d93e7f6ee2f68762f2f1b67c3fb8483f9d4c4b3

SHA256
64048dd2f90cd8f9299fca56246451af245aa6846ebcb536b15756f2663372dd

SHA512
4f591616b3b461b549266ac05ef3de82acd25b7987c7c3e8752104f7ba561cbf59fed78dd6b57a051cff599d11c58424a65ffff508fc00a7f2bcb90137a38281

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
58171b7e60978072dc76c7e0ae3b0f4a

SHA1
7f6552654cd4229d91b3b55e5b597eca353dcb55

SHA256
d8716011a97876db8ce4c3f79d7d894c358f02c5bfee52dc40e54ff1f22192ae

SHA512
cabad429558cdc584a0f691370fc4cd0a7c9eee5f73e679394726e2d16834228638a62a07463dd059fde277707c5bc513a2b86673591395ccf7948aa79549554

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