wannacry | 85b2151ca7c6c998fcb4fff42ac336e8d625b119e54c459fb6f23a91de753453

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
15-09-2024 17:50

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General

Target

e30f6fa5867cc2f0bb4d2f1bf8e8cba4_JaffaCakes118.dll
Size

5.0MB
MD5

e30f6fa5867cc2f0bb4d2f1bf8e8cba4
SHA1

fad07a8c8b717aeb75c2079798d6f4645c7741c4
SHA256

85b2151ca7c6c998fcb4fff42ac336e8d625b119e54c459fb6f23a91de753453
SHA512

37eedaa71fcb40228b2354721772b90eb715da43eda2c601dbc587662c50f89d16cfd192a560a3196a6c480b0b003a7e9829acce945f01c43ab82647aedd76d3
SSDEEP

98304:+DqPoBhzJRxcSUDk36SAEdhvxWa9P593R8yAVp2H:+DqPeHxcxk3ZAEUadzR8yc4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3329) 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
4268	mssecsvc.exe
3828	mssecsvc.exe
636	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\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
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvc.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 4432	1088	rundll32.exe	82
PID 1088 wrote to memory of 4432	1088	rundll32.exe	82
PID 1088 wrote to memory of 4432	1088	rundll32.exe	82
PID 4432 wrote to memory of 4268	4432	rundll32.exe	83
PID 4432 wrote to memory of 4268	4432	rundll32.exe	83
PID 4432 wrote to memory of 4268	4432	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e30f6fa5867cc2f0bb4d2f1bf8e8cba4_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e30f6fa5867cc2f0bb4d2f1bf8e8cba4_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4432
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4268
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:636

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:3828

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
afad349cab74e6d44ebea50d7725dae4

SHA1
eda6a06febfa77b75d1adc0118725a7351ccb004

SHA256
9159f26f8e02c8250f94c129defa6a8aefa2ea7bb03feba2675d919a8a3782dc

SHA512
09fe4e23893427ada73f8ec2b7ae667bf51fd89def90f9a08a9ee12309e954a5b76e115178c6f8ef939832193776a78428d383a380fc475a671ed7ad89214825

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
d9e4a5258c58d09727b5c9b00481307b

SHA1
7bf87925daa26e06c249ab6cc6a3e04bd1b2e399

SHA256
f62699be9e568f4b3fbf1131966a44421b07e1927ec7c42abe9b8fd95c0ec5ce

SHA512
eadfd091ce13c1bffd6bf7386f7895813f8ff9d93c12a83d3b7e5876e1d4617df5691e462c047e0a50ccdc656cb1a5b110a5b099988995f07bf669d051d16732

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