wannacry | d92d6a703f28f24dfd7e89539dbe9bcf1dd934cba35701ca3dc80e1df77d5d9f

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
18-09-2024 12:56

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General

Target

e92b01f74b444051f1d46ebb35189827_JaffaCakes118.dll
Size

5.0MB
MD5

e92b01f74b444051f1d46ebb35189827
SHA1

7d5ed3ddad118dd91631bcf07094af919ba60fd8
SHA256

d92d6a703f28f24dfd7e89539dbe9bcf1dd934cba35701ca3dc80e1df77d5d9f
SHA512

80f9efef34d418c12b82dccf23344c9013176fd7b20ca2edfdc28d5dcfca7e6f6a79717c5d6cc75cd560071470efad6665d328ad08c0534b576cc8a09d0b96c4
SSDEEP

49152:znAQqMSPbcAQej/1INRx+TSqTdX1HkQo6SAA:TDqPooz1aRxcSUDk36SA

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3254) 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
1168	mssecsvc.exe
1052	mssecsvc.exe
4120	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	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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 4624 wrote to memory of 1016	4624	rundll32.exe	81
PID 4624 wrote to memory of 1016	4624	rundll32.exe	81
PID 4624 wrote to memory of 1016	4624	rundll32.exe	81
PID 1016 wrote to memory of 1168	1016	rundll32.exe	82
PID 1016 wrote to memory of 1168	1016	rundll32.exe	82
PID 1016 wrote to memory of 1168	1016	rundll32.exe	82

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e92b01f74b444051f1d46ebb35189827_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e92b01f74b444051f1d46ebb35189827_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1016
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1168
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:4120

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:1052

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
0d9276ce0d733a52b89d9524ef225a2c

SHA1
a6da2687d7672d44c6acc9e68836e3b33d462f76

SHA256
e6df32d09640d22852effba13b0cba542dd77b67d8970dffe6dc485aa332f86f

SHA512
d2615cd85ada8a3b6d816e0a16a0d41c416ec3c3c3ef66ee5bf01f2b2d018938c9537fe97abe828aaabc4fcb5ef1968225860d4db51ef1003789b796ae125102

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
ea0ea0ea78f9e26fc581531713c820c3

SHA1
fa2e6d12aac25a5b080718f7544f8e471a159141

SHA256
5c5de278da2d4595049b8af4c2c098d1af6366a09b23c9f4c324bc0605376224

SHA512
adb3af71a8bd17379dbd2841d084ee661cc053c1930f22c01d02b433633c4e0a3f2ad4d3c26a8e570baa47e7c17c58ee6f31dc6c860330caa8a619c0b3f03b6e

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