wannacry | 86fdbd218c2511cc95b6ab7b7474b62b8e6b1ac60f6edb73692c4234d724aae2

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
01-08-2024 09:19

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General

Target

7ff51ccc350e3bd126b30f1170d7059f_JaffaCakes118.dll
Size

5.0MB
MD5

7ff51ccc350e3bd126b30f1170d7059f
SHA1

7828cf2d340fcb57e1eae9fb395460fedc59a42d
SHA256

86fdbd218c2511cc95b6ab7b7474b62b8e6b1ac60f6edb73692c4234d724aae2
SHA512

b6ffeb63f78370da82ec4cb63e4757aef484938c4b4fb64ac7b8ec0b7a2629ba32199364e1d66a57965c827c5ec5b03231209f899a6519aec1c32d8abf834691
SSDEEP

49152:SnAQqMSPbcBVQej/1INRx+TSqTdX1HkQo6SAMh9FWy8U4WpEk6aize3wK:+DqPoBhz1aRxcSUDk36SAAanaiK3L

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3201) 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
1308	mssecsvc.exe
1860	mssecsvc.exe
4048	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
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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 3108	4456	rundll32.exe	83
PID 4456 wrote to memory of 3108	4456	rundll32.exe	83
PID 4456 wrote to memory of 3108	4456	rundll32.exe	83
PID 3108 wrote to memory of 1308	3108	rundll32.exe	86
PID 3108 wrote to memory of 1308	3108	rundll32.exe	86
PID 3108 wrote to memory of 1308	3108	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\7ff51ccc350e3bd126b30f1170d7059f_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\7ff51ccc350e3bd126b30f1170d7059f_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3108
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1308
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4048

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:1860

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
d3df439f64e02727c16eb7e97132a4bd

SHA1
08f587a8bff326c3f8366db410949c2bff2084b8

SHA256
68ac0bafee09841815e5769d2bce85c3e771adf6f2dcc564b759f349936877df

SHA512
1728324abecd0436793e4b779157ba7b7753feaa74166b1c96ec6b623ec632996e3f2c4efdd2305f735e69e8231ac1e6caddc075ca95b8e54869438be658da77

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
a0e9fc052295bcbfe3cb412e5a4a9338

SHA1
93460ee6176f11e3691573fc52b291cf7261e3fa

SHA256
548dd44dc103d64a5b25f44b9335457b55c750dab7d3e1eb6dfd6ad291433380

SHA512
5bc8e95733b7ee00e8e28cd98d6144212bb47741c6d1647677b1b71571daa52979917f527a0e6eaff44f82c5233e43268f82b7b0c7973dff45ff1ef1bc3ea450

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