wannacry | be82a36ff7a1f80fdd04123552815fc4e4cd61b7791f42240c08976b525fa546

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
26-09-2024 23:25

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General

Target

f954b974b717c77f377f9efe747fbac1_JaffaCakes118.dll
Size

5.0MB
MD5

f954b974b717c77f377f9efe747fbac1
SHA1

16db73d8089233d16c0454f7833d6345d15da871
SHA256

be82a36ff7a1f80fdd04123552815fc4e4cd61b7791f42240c08976b525fa546
SHA512

f715d51082c61fcc0749886cbb9afb3d635b5cb314f99b56eec1663d279c403f0d655cd985eb5799472dd2ab7276e9252751733464032a96313e9fa3f566ef61
SSDEEP

98304:+DqPoBhz1ScSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPe1Scxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3323) 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
1880	mssecsvc.exe
4584	mssecsvc.exe
2864	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 224 wrote to memory of 4416	224	rundll32.exe	82
PID 224 wrote to memory of 4416	224	rundll32.exe	82
PID 224 wrote to memory of 4416	224	rundll32.exe	82
PID 4416 wrote to memory of 1880	4416	rundll32.exe	83
PID 4416 wrote to memory of 1880	4416	rundll32.exe	83
PID 4416 wrote to memory of 1880	4416	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\f954b974b717c77f377f9efe747fbac1_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:224
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\f954b974b717c77f377f9efe747fbac1_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4416
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1880
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2864

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:4584

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
69762a3f6b71e9ba5afb0f7c4a162e94

SHA1
004a5ea2cefe96c4a4d7cb461bb225b93d82a8f3

SHA256
6656d1b3958a6a5b2a30abc7f43908e291e081dfa557152e0c06a04a90890eca

SHA512
a7a080f4aeb56d72df5d5ee81387b61133de3b9f0d1b430fd6b7e35c4f0e8c9d34138a93e1c1d665e979c6200bfef81665257855b5cb08a5164a85906d391b6b

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
4b6bc9ea17de240e52381814b492d436

SHA1
e625b78de22525b4913b384e6271a40342b6f394

SHA256
f2eaeca5d307d4265ce81a652f3c2777e49d61af9902614476b471b87c7e0f60

SHA512
d38c6df79a1a81a45de83e2a772fbabc06cd43ad45cc81730e888d6fa20acf959d4ac0ef8fdba4cb1fcb958ded4f9a77df76f208f2d8118b75ee00556889e2b2

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