wannacry | c694e3749f485147f314e63e1f5c2f41b59c9b27a51e14f49844dec095310363

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-09-2024 21:08

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General

Target

c694e3749f485147f314e63e1f5c2f41b59c9b27a51e14f49844dec095310363N.dll
Size

5.0MB
MD5

e8611c0286f6ef0b44b86896f0af8430
SHA1

c68f86e8432aa960a872e1947691bb4305fbab4e
SHA256

c694e3749f485147f314e63e1f5c2f41b59c9b27a51e14f49844dec095310363
SHA512

1c19318740b833ff5cd0a774af2037aa44e68f6f36af9fb73c3f5a50e43dcaef668beb22f3b9917eb3aa7c48e347d9cbdab16b2d61ef072c5e789d2e175cd179
SSDEEP

12288:ywbLgPluxQhMbaIMu7L5NVErCA4z2g6rTcbckPU82900Ve7zw+K+DHeQYSUjEXFy:JbLgdeQhfdmMSirYbcMNgef0QeQjGI

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2472) 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
2692	mssecsvc.exe
1620	mssecsvc.exe
2924	tasksche.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\Temporary Internet Files\counters.dat	mssecsvc.exe

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 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	mssecsvc.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 2156 wrote to memory of 1172	2156	rundll32.exe	30
PID 1172 wrote to memory of 2692	1172	rundll32.exe	31
PID 1172 wrote to memory of 2692	1172	rundll32.exe	31
PID 1172 wrote to memory of 2692	1172	rundll32.exe	31
PID 1172 wrote to memory of 2692	1172	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\c694e3749f485147f314e63e1f5c2f41b59c9b27a51e14f49844dec095310363N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2156
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\c694e3749f485147f314e63e1f5c2f41b59c9b27a51e14f49844dec095310363N.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1172
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2692
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2924

C:\WINDOWS\mssecsvc.exe
C:\WINDOWS\mssecsvc.exe -m security
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
PID:1620

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
a547ea33025174fab4d1f549045573d6

SHA1
e1c3339660be0bca43a6389a21b7ff58da1faea8

SHA256
fd9d4788a6d08f3a27265e24f52f3776c6e6dc278c5cb1e9105c1eabb204e477

SHA512
7075cf8bdaafc8b73a957211516013f281f56564a6b3fd5ab9372288548fbfb1b5d13db19bdc99cada2c080ddee2996d1a316f3df6acb13bdaf3047b43543f70

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
86e3f55745bd48a5f14e36079fa35c08

SHA1
83ca4360e19384de800dcfb8954372b63e16be0c

SHA256
fa590e6e5fea75b8d5b5269b9bd16463645e46eb3d7a0504e0db8129c2083790

SHA512
175d56f34fbf300c02b4ec5a61679a371502f11bfbdbef488b4d3d220c68dfa3c5b4efdc2924859525d16c8d36cbfba0d8694a351bc093ade38abb2cee9c9f6c

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