wannacry | 9209b7bf78a3e064358626d59b608cf90e4913e3ed6cc0482b845c14ed8837db

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 07:17

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General

Target

6671a8c1f7db3f146f562b114219a57b_JaffaCakes118.dll
Size

5.0MB
MD5

6671a8c1f7db3f146f562b114219a57b
SHA1

871c6d5567b8b0999be568f23672915836cd8c41
SHA256

9209b7bf78a3e064358626d59b608cf90e4913e3ed6cc0482b845c14ed8837db
SHA512

71236eca5b638952c2084020547596edbded3f1c4ca5e12bf0ce5cd6d56b38cf46746d0c2cc21c8c16b86770067c92e701f8973883ffa2d73dee68c17299573d
SSDEEP

49152:SnAQqMSPbcBVQCj/1INUusG5VoEYVrG2SY7Vp/XNg:+DqPoBtz1aUZLFy2V1

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3144) 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

1572 mssecsvc.exe
2120 mssecsvc.exe
2056 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
1572	mssecsvc.exe
2120	mssecsvc.exe
2056	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 464 wrote to memory of 3712	464	rundll32.exe	rundll32.exe
PID 464 wrote to memory of 3712	464	rundll32.exe	rundll32.exe
PID 464 wrote to memory of 3712	464	rundll32.exe	rundll32.exe
PID 3712 wrote to memory of 1572	3712	rundll32.exe	mssecsvc.exe
PID 3712 wrote to memory of 1572	3712	rundll32.exe	mssecsvc.exe
PID 3712 wrote to memory of 1572	3712	rundll32.exe	mssecsvc.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6671a8c1f7db3f146f562b114219a57b_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:464

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\6671a8c1f7db3f146f562b114219a57b_JaffaCakes118.dll,#1
2⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3712

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe
3⤵
- Executes dropped EXE
- Drops file in Windows directory
PID:1572

C:\WINDOWS\tasksche.exe
C:\WINDOWS\tasksche.exe /i
4⤵
- Executes dropped EXE
PID:2056

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
PID:2120

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\mssecsvc.exe
Filesize
3.6MB

MD5
ef9f8ed3b1c339e065b76ac3593b9871

SHA1
9337bc12ce8cced55220ecc6a105ce6f9ccc84a4

SHA256
b0a0f1283bb69ea489a7a912c5b9b6d72b216ae90e5020c7a07a6b5ad3cfa715

SHA512
82891893b1d6cf2050ad7847deb2cb798f0018954ba4f1379bd7350c4a96e6ec04f659dc8fd7c6337709fa3bebf4e38949d3854dccd9a7700bb26411bab55dad

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C:\Windows\tasksche.exe
Filesize
3.4MB

MD5
2b98ecc02a83f9cd1aa8e2153fd894e7

SHA1
4ebddd9090dedb303c719cdce269f3045fb10932

SHA256
18eee15a89750d98e9e3ca6ae5a4effea0d2f0ed0cef9fcd65d1731461aaa92a

SHA512
65e45b68d5979e7c7caf58b29b4708b4972fbc7723322ca4209c7d15208923ef5396bfa65511ce216609b4a4adf282ddde302429766a5b8b32f235fa1dc17b4b

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