wannacry | 0b10cf5deb1a32890775e64ed3e744741f2f61e183710c2424dea87c2d76ee4d

Resubmissions

25-09-2024 15:38

240925-s3j93awgmg 10

25-09-2024 13:57

240925-q877zayfjn 10

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 13:57

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General

Target

f628c136739115e54ac5d385627b9869_JaffaCakes118.dll
Size

5.0MB
MD5

f628c136739115e54ac5d385627b9869
SHA1

51e5a1122bf3e6585b8a90feca752bb83b4ad198
SHA256

0b10cf5deb1a32890775e64ed3e744741f2f61e183710c2424dea87c2d76ee4d
SHA512

16b2e97288aacdabadaa7e4fa599037c69f8c44ce19ad40aa6f230d733bee1f5afd0d62c5d607e780b0faa96be23ffeb2fe0cb5af82d623bc666fbd1269733d1
SSDEEP

12288:yvbLgPlu+QhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DHeQYSUjEXFG:SbLgddQhfdmMSirYbcMNgef0QeQjG

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3225) 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
3460	mssecsvc.exe
1992	mssecsvc.exe
2776	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 2524 wrote to memory of 3700	2524	rundll32.exe	82
PID 2524 wrote to memory of 3700	2524	rundll32.exe	82
PID 2524 wrote to memory of 3700	2524	rundll32.exe	82
PID 3700 wrote to memory of 3460	3700	rundll32.exe	83
PID 3700 wrote to memory of 3460	3700	rundll32.exe	83
PID 3700 wrote to memory of 3460	3700	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f628c136739115e54ac5d385627b9869_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f628c136739115e54ac5d385627b9869_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3700
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:3460
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2776

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:1992

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
8ba2d290793bf4790e153f526af622c8

SHA1
e14c5e00a8a6e9f2cc50ac7593e5474de72d9c39

SHA256
9da1e7b1ec53d8144fa5bfe420bac4cc958f0312096f6ef63ed6559b7802caf5

SHA512
31eb440b050b0f2720762501e322f0e85612ef41ffbc8dee16fc368b6d21c74d3d408f42d1d5962b1790307439ce1e2c4d83ce96877f377e1b7a503df85ade9c

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ca4b69cf8a955f50eb24e4808d40136b

SHA1
c528d92fef539c0420676c9fdf0551c365bdf1b1

SHA256
b88f43e788bb21eea3ddf59efecf95c9c1b8b519b54ff8492117b7166dc988ed

SHA512
0538223d170c4fb3dab490d75d88c91c589fe1d8151dfee6f938e867966ec96d3e7bb89734c54bb36d1da5fc8ed4872253ff8da720456ecd6e5d72e1a36628e4

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