wannacry | 758aa3fb563516108e710069a99b5e5f7a8a2b37ba18462b9ebaebd5f791137b

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
18-09-2024 15:50

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General

Target

e976d16465fed8b651bbb7048627c6bb_JaffaCakes118.dll
Size

5.0MB
MD5

e976d16465fed8b651bbb7048627c6bb
SHA1

d74537b257ba5239623c339df5a276def07dd7c2
SHA256

758aa3fb563516108e710069a99b5e5f7a8a2b37ba18462b9ebaebd5f791137b
SHA512

b3bc2350883ad13784e5838ebb02eec3b26c2577efbd2b856f5d02dfc0f4b73514f0e95a480481823af7427c5fbd4822c247b55526d4a1b7ea596260d1f051f3
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWaRYod8V:+DqPe1Cxcxk3ZAEUa

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3135) 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
4060	mssecsvc.exe
4396	mssecsvc.exe
1808	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

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe

Modifies data under HKEY_USERS 5 IoCs

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

description	pid	Process	procid_target
PID 2600 wrote to memory of 1916	2600	rundll32.exe	82
PID 2600 wrote to memory of 1916	2600	rundll32.exe	82
PID 2600 wrote to memory of 1916	2600	rundll32.exe	82
PID 1916 wrote to memory of 4060	1916	rundll32.exe	83
PID 1916 wrote to memory of 4060	1916	rundll32.exe	83
PID 1916 wrote to memory of 4060	1916	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e976d16465fed8b651bbb7048627c6bb_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e976d16465fed8b651bbb7048627c6bb_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4060
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1808

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:4396

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\WINDOWS\mssecsvc.exe

Filesize
3.6MB

MD5
c462be8230e941984e90a06d38e64894

SHA1
d495b0d84a79b29fe17d7a8134bd307a70b9ed3a

SHA256
2b49f9263d4f977f9e56be0b6ae4468fba84e1908add67cbc077a55bd2f83c11

SHA512
6fb5b4e786cc56f81fc4f3537ed553bc77d61da81447e0e1fb038332a03edadc39a36182c5f501bcb95ad822161c864c9afa83da98762ba20a572bd26ff2b07c

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a839cfbbb9476e6c97d696fe6cedda30

SHA1
3c01d4adcfe88672685556c0e98fb5d407cb5522

SHA256
eeca969e01d66a71a7ba803864f0de38a8018e7ff58f2cefad2a1a94ef9c27e9

SHA512
233d92ae8341895145f400bf98bbc25b8c518a91d5e081ebd7f7d7c55d06c1a1ef641ddfb237516edf3a53b38891fbcc8cab1f8a7eaff83a4958c517fe6bc59e

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