wannacry | 64e400e6cde02b341e315d382551b26937b6afbe6cfd972dd5b51022bac119d0

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
06/09/2024, 05:06

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General

Target

cebb64bfd042804239424fed482aa986_JaffaCakes118.dll
Size

5.0MB
MD5

cebb64bfd042804239424fed482aa986
SHA1

c2c69f71f8937c420557913b7d332eb5247ec373
SHA256

64e400e6cde02b341e315d382551b26937b6afbe6cfd972dd5b51022bac119d0
SHA512

b61a92b078b8fb368415e4b8d95e1da0c9d16ac675bbebada0e6a45ad11bef6827d9672f7dfedb7fd6fa5f3153a660cddc00e2ae5136c64bd5df6965105002fe
SSDEEP

49152:RnvMSPbcBVQej/1INRx+TSqTdX1HkQo6SAARdhnv:1vPoBhz1aRxcSUDk36SAEdhv

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2086) 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 2 IoCs

pid	Process
1148	mssecsvr.exe
2840	mssecsvr.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\tasksche.exe	mssecsvr.exe
File created	C:\WINDOWS\mssecsvr.exe	rundll32.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	mssecsvr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mssecsvr.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	mssecsvr.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	mssecsvr.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 1884	2736	rundll32.exe	83
PID 2736 wrote to memory of 1884	2736	rundll32.exe	83
PID 2736 wrote to memory of 1884	2736	rundll32.exe	83
PID 1884 wrote to memory of 1148	1884	rundll32.exe	84
PID 1884 wrote to memory of 1148	1884	rundll32.exe	84
PID 1884 wrote to memory of 1148	1884	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\cebb64bfd042804239424fed482aa986_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\cebb64bfd042804239424fed482aa986_JaffaCakes118.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1884
- - C:\WINDOWS\mssecsvr.exe
    C:\WINDOWS\mssecsvr.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1148

C:\WINDOWS\mssecsvr.exe
C:\WINDOWS\mssecsvr.exe -m security
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:2840

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

Replay Monitor

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Downloads

C:\Windows\mssecsvr.exe

Filesize
2.2MB

MD5
e6dd1a9120db24bd3d3f5ab4b25d42b4

SHA1
903ea50bc554d2aa850bd8b76b16f253bfab955e

SHA256
d3e74cf961129cca064933f808d8ada0c3dc66073bf7173fc5d8e5ad65eda4de

SHA512
2d2be7337a2d51051072a79a55fb75df3345ed3de989b5892e42e53ec740908ef40ba52c05d070980dd122cb70da0e1eff8a6b8f62b677e530bf80b0d64041e1

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