wannacry | 35566c14871e95e6230523fb2f4a141b8f7109e709e6012adffcd20fbe19c201

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
09-09-2024 22:49

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General

Target

d73868260ae5c84d2b69d8cbfd6a20fb_JaffaCakes118.dll
Size

5.0MB
MD5

d73868260ae5c84d2b69d8cbfd6a20fb
SHA1

a9448d7d686bd72434a560e797a40ea86c120c3f
SHA256

35566c14871e95e6230523fb2f4a141b8f7109e709e6012adffcd20fbe19c201
SHA512

9c9a85f3ab6474495b7566da7c9ed6097e9c9c97b6cdb67b58811230580f33a2dc919f647bbfda76764fc68dba545e871aa8a61ea20fd1261b14e184e8580be5
SSDEEP

98304:+DqPoBhz1aRxcSUDk36SAEdhvxWa9P593UAVp2H:+DqPe1Cxcxk3ZAEUadzUc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3324) 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
2200	mssecsvc.exe
1824	mssecsvc.exe
1208	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 3900 wrote to memory of 1112	3900	rundll32.exe	83
PID 3900 wrote to memory of 1112	3900	rundll32.exe	83
PID 3900 wrote to memory of 1112	3900	rundll32.exe	83
PID 1112 wrote to memory of 2200	1112	rundll32.exe	84
PID 1112 wrote to memory of 2200	1112	rundll32.exe	84
PID 1112 wrote to memory of 2200	1112	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\d73868260ae5c84d2b69d8cbfd6a20fb_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3900
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\d73868260ae5c84d2b69d8cbfd6a20fb_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1112
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2200
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1208

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:1824

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
44baf24b1e4e44f92b0b728bbb0343a7

SHA1
a3969f26947cc0e4145e7ca7067dcc25217b0bf8

SHA256
7b9455f87587b2330f0cbfcfa870e0d9bbdabd628055cafe1e694f05327f6dee

SHA512
d957570a7f5fc54df506b68be848c44622f5b3c22f78a0c89f9ac650096ffd7d0f84f6e246082ba0e11ce2b9f6349ea8df3b833d01c2b2809f9b0c04e83d9ae1

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
75e46f3f2725ca029eed8aed1c09bafc

SHA1
b8a31619622c191008e2fa226d6a9bd25130b4a3

SHA256
f43678776ab9d5f8cec833eedbbfa34b364b45af602f6318e6347e6f741719ce

SHA512
31dc722a7f333f693b1317b14b16937f2f7fbf6d37d5499ed3d628af3f6779d632dcdaabe37654e63b66b0d5d4caad5c939760d2efb0b32b91f268420ebccece

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