wannacry | a4c7022dd7d4aa7eb066676179e5bfe818cdf0a6c4da9d5122d9be6156e7fe51

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
12/07/2024, 16:48

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General

Target
3e1f1ab7eb22b54d451f764377d869ab_JaffaCakes118.dll
Size 5.0MB
Sample240712-vbddjstgng
SHA256 a4c7022dd7d4aa7eb066676179e5bfe818cdf0a6c4da9d5122d9be6156e7fe51
MD5 3e1f1ab7eb22b54d451f764377d869ab
SHA1 0ef805454a7aeb92e5be18457fe430f22186fbc4
SHA512 16c237558076cdc622281a76f541ab28ca56d24ccdc63538d104c3acf51db9323d374051f4ba5a637cb39bf1cd8c85374fec6ae6181806e025020f9705735022
SSDEEP 49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:+DqPoBhz1aRxcSUDk36SA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3308) 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

pid	Process
4232	mssecsvc.exe
1056	mssecsvc.exe
4400	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

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

description	ioc	Process
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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 1508	1144	rundll32.exe	83
PID 1144 wrote to memory of 1508	1144	rundll32.exe	83
PID 1144 wrote to memory of 1508	1144	rundll32.exe	83
PID 1508 wrote to memory of 4232	1508	rundll32.exe	86
PID 1508 wrote to memory of 4232	1508	rundll32.exe	86
PID 1508 wrote to memory of 4232	1508	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e1f1ab7eb22b54d451f764377d869ab_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3e1f1ab7eb22b54d451f764377d869ab_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - Suspicious use of WriteProcessMemory
  PID:1508
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    PID:4232
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4400

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:1056

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

mssecsvc.exe

Path C:\Windows\mssecsvc.exe
Size 3.6MB
SHA256 4b80a8b70c6747147dcda5fde12cc8902b3718b170eb980946bb86fa13d8ba2f
MD5 6023bb9604c82902e33abaad4053a6e2
SHA1 486557ea1f58f88f464419cfda8b18b6ffa15a95
SHA512 bc6509fee9f95d5ba21d3113b2d9f49cb16bdd5d0c9418e7dc330b687749bc8102e9c6d3f8cab60aebad982a4472712d37fa28cd9b00340af1d3378d52723f6e
SSDEEP 49152:2nAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:yDqPoBhz1aRxcSUDk36SA
MD5 SHA1 SHA512 SSDEEP

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tasksche.exe

Path C:\Windows\tasksche.exe
Size 3.4MB
SHA256 78af6438e64841ed977e12fccb2e875bfc6b9a7efdf4bca82f6f32606fb87561
MD5 b0b1b2ce3d7548b46841b09560f9b1f2
SHA1 5f05a88a74eb2c47078e6c41c25ebda484b45db4
SHA512 5c29203a0ad41efe4b9ced47b322b81d3a3b44950f9ca0bc936f6699ea2837794fe5e7cf59fd22b5b1b00b5145e372c3f2b82cc9c54795e3fd95b0664fce4943
SSDEEP 49152:nQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAA:QqPoBhz1aRxcSUDk36SA
MD5 SHA1 SHA512 SSDEEP