wannacry | 24eb185b918fdc840b44b8c3a8cfcac21660359182edbf6cf9afa4cc7fbb3539

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
20-09-2024 00:17

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General

Target

ec778b5a1be5dfb4ae454bd66d62863a_JaffaCakes118.dll
Size

5.0MB
MD5

ec778b5a1be5dfb4ae454bd66d62863a
SHA1

8022e9050016e76682479701336585312a137a59
SHA256

24eb185b918fdc840b44b8c3a8cfcac21660359182edbf6cf9afa4cc7fbb3539
SHA512

7af40e7f8d28fddf9826917ac61d0827dbef37dba6ca4544dfb38f28082b7cad30919f33890582b64730fa0cf930f56bf66c434b62d89316e49b1074af67ec2c
SSDEEP

49152:SnAQqMSPbcBVQej/nAARdhnvxJM0H9PAMEcaEau3R8yAH1plAH:+DqPoBhznAEdhvxWa9P593R8yAVp2H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3286) 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
4620	mssecsvc.exe
1784	mssecsvc.exe
1684	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
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 644 wrote to memory of 1360	644	rundll32.exe	82
PID 644 wrote to memory of 1360	644	rundll32.exe	82
PID 644 wrote to memory of 1360	644	rundll32.exe	82
PID 1360 wrote to memory of 4620	1360	rundll32.exe	83
PID 1360 wrote to memory of 4620	1360	rundll32.exe	83
PID 1360 wrote to memory of 4620	1360	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ec778b5a1be5dfb4ae454bd66d62863a_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:644
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ec778b5a1be5dfb4ae454bd66d62863a_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1360
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4620
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1684

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:1784

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
fcbf99f853fe31118e12eddc988f3a4e

SHA1
81c20bf094c7fc9d9da32056cce68d73c1c62746

SHA256
a48cc247fea29c2cce38400203fd179b80c19d146387a66716c43a6bd60073ae

SHA512
54be12aaeaea3703efa612162186c9d7e52ffe7152120974960eae86dd5614cac9e4a9d5eee79568b5d96ba7cff79db588905f8aa4aa1db306bc6de81c2f3faa

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
dc0ec02114c53390db161f46c24b5659

SHA1
97bd4879b4417c862da272f7bcc724509876c19f

SHA256
452820fbae20865840adaf6627969019dc377a0a45c762f0df21f682c7a95f07

SHA512
b01460cd88ad6c9612fb5f5c48e03c4bc840b9a2f021314a4d5609fb488c79c6285a9d3376883b90f39f9e414d1f9113030008bd226e41037940800353967f54

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