wannacry | 60770e4751114df2b31a672db19fd5bd04ec63b77860e3b746f9eb9838356968

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
28-08-2024 00:50

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General

Target

c5fe708211a86f20b67e9a576e744f43_JaffaCakes118.dll
Size

5.0MB
MD5

c5fe708211a86f20b67e9a576e744f43
SHA1

3a5c49ef70078f99269fb36a30dd45c8ca709ac1
SHA256

60770e4751114df2b31a672db19fd5bd04ec63b77860e3b746f9eb9838356968
SHA512

dc3ea5d4e73c6ce69d6c44ead78063e199c4ab8f457786e2365ec2f6636930bc0d08db95986f743b159eb2e7ea3250d1b07a67989bd1afb0461a9ae13b36cf0b
SSDEEP

98304:TDqPoBhz1aRxcSUDk36SAVvxWa9p593R8yAVp2H:TDqPe1Cxcxk3ZAyaPzR8yc4H

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
1412	mssecsvc.exe
1176	mssecsvc.exe
4620	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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4512 wrote to memory of 4860	4512	rundll32.exe	91
PID 4512 wrote to memory of 4860	4512	rundll32.exe	91
PID 4512 wrote to memory of 4860	4512	rundll32.exe	91
PID 4860 wrote to memory of 1412	4860	rundll32.exe	92
PID 4860 wrote to memory of 1412	4860	rundll32.exe	92
PID 4860 wrote to memory of 1412	4860	rundll32.exe	92

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c5fe708211a86f20b67e9a576e744f43_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4512
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c5fe708211a86f20b67e9a576e744f43_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4860
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1412
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4620

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:1176

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4248,i,15436195446242760253,4000484513008731869,262144 --variations-seed-version --mojo-platform-channel-handle=4208 /prefetch:8
1⤵
PID:2888

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
2b49b13445e21852d9dfa48fadb3e7f9

SHA1
3ef5a499e90730a1a59cf7e43ed1621c69ae172f

SHA256
069c4beccb86d69dd91dc153bfb63042156d1d5d215002a3471d278c25105bc1

SHA512
79b77c4db3f76296a50aa54287ba19ad771ed48020fc8c121b69caa0a3846ca4c78b8be08bcf4f2b6f2b7545b851d855eff8c5adf77328ec395b70c685cfc037

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
6ca3195f0e24912321277cfc20cc3b6c

SHA1
d871e04be352f05423ec54acc26e3df4b6a68363

SHA256
faa6cf366afcffa39c3797c29371dc7a871fa7f11ac73fbac40d81ab6df4d891

SHA512
7d49abc8d79da5a05b88702a8f8377db445769f3fd6441ab9f9108a34498275ef24d6fb56766ccbe1f0a9123c39b2fabe9681b0b011bb6ed9037f1ce93e8cb13

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