wannacry | 46d23bc35d038fbeaf2c3e86a89c42319560e8a6a4a3fd3bd743d96f2b49f238

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
13-07-2024 16:22

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General

Target

42708471bba43fab8c0834de27a7a3a4_JaffaCakes118.dll
Size

5.0MB
MD5

42708471bba43fab8c0834de27a7a3a4
SHA1

9a87f4a8ce7bfb5e9dda353a0a308f228353bcfe
SHA256

46d23bc35d038fbeaf2c3e86a89c42319560e8a6a4a3fd3bd743d96f2b49f238
SHA512

bae3fe3021fe0ef0f5a16e9db9a51630daac987c984f673aabab6cd14bf6f88855699c71b6ff97322dbd08e1c5e1c861d7dc117095ad372525d75e8abd47906d
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2:+DqPe1Cxcxk3ZAEUadzR8yc4

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3232) 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

400 mssecsvc.exe
2632 mssecsvc.exe
4172 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
400	mssecsvc.exe
2632	mssecsvc.exe
4172	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 3548 wrote to memory of 2212	3548	rundll32.exe	rundll32.exe
PID 3548 wrote to memory of 2212	3548	rundll32.exe	rundll32.exe
PID 3548 wrote to memory of 2212	3548	rundll32.exe	rundll32.exe
PID 2212 wrote to memory of 400	2212	rundll32.exe	mssecsvc.exe
PID 2212 wrote to memory of 400	2212	rundll32.exe	mssecsvc.exe
PID 2212 wrote to memory of 400	2212	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\42708471bba43fab8c0834de27a7a3a4_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3548

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\42708471bba43fab8c0834de27a7a3a4_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2212

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:400

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:4172

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2632

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
7d6e0f7ee20eefad8ccf2bd89abc1691

SHA1
a5b6fae7eabbbc52d3514b0af036dd5fe9134eed

SHA256
b4c3c0d59da89f08f9a0e2d8703548a0734b498862397b8301db7527e207f6cb

SHA512
532f6afd1b382b346a07ec2538b51d1bae5608b169dfe62ca0424196e9f15e68643f3c2d0d0ceca9bc82a1178dd85d213dbd91b63730bce6329d0ab23c9430e0

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
3345ae752bf8ce297ee33bed8ef8dffd

SHA1
82ccecde64722d21b0a2c9f5d803145997fb7940

SHA256
7b52ecf501e14a1d634b8e67bd75f2ae810de38373803b165e0146ceeb308471

SHA512
409ffd2a0d26d4e5b1954116b3860a92289abcbce84d266008943011ba9b0728b51ae21732240fccc8475a219a0d3d687c0af9e80fef3b1f33308e357bf2f43e

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