wannacry | 5b7edc95ab8033817fb07fee8e8f114be7f1873abcd69d07899ac60ae9b9763a

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
15-01-2025 01:51

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General

Target

99fbd88dafad2ed4a82cc80f8b8eb8d4.dll
Size

5.0MB
MD5

99fbd88dafad2ed4a82cc80f8b8eb8d4
SHA1

e2023fcc0a9991c84fa24ea4f3285305514c52cb
SHA256

5b7edc95ab8033817fb07fee8e8f114be7f1873abcd69d07899ac60ae9b9763a
SHA512

a012ac91f0475943cdfecf882e96e940cb445e7466d3a4e9d8737412b265b54d941a5a9798754e2942ef1c6b17deac56d351206f7cd8808560ccae30b554be8b
SSDEEP

49152:JnAQqMSPbcBVQej/1INRx+TSqTg6SAARdhH9PAMEcaEau3:dDqPoBhz1aRxcSUg6SAEdt9P593

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Wannacry family
wannacry
Contacts a large (3338) 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
4812	mssecsvc.exe
996	mssecsvc.exe
1092	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	rundll32.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\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
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

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3276 wrote to memory of 4232	3276	rundll32.exe	83
PID 3276 wrote to memory of 4232	3276	rundll32.exe	83
PID 3276 wrote to memory of 4232	3276	rundll32.exe	83
PID 4232 wrote to memory of 4812	4232	rundll32.exe	84
PID 4232 wrote to memory of 4812	4232	rundll32.exe	84
PID 4232 wrote to memory of 4812	4232	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\99fbd88dafad2ed4a82cc80f8b8eb8d4.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\99fbd88dafad2ed4a82cc80f8b8eb8d4.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:4812
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:1092

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:996

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
8ed7f2e1aae7a4371aa929a5eb6a6e59

SHA1
b7527fb2d0e20fff576e747883b442aba1984dbc

SHA256
2b2f4b29a1cee09d68d765422f86812aae50e9b92b39cff3cfe1c57b3d34d279

SHA512
2257bc07bfa2e96483fc9823accc1c2eba6a7bb78df4bee58c6db7ef06097deaa6d7a6735b6a897ea9166721434c423854b96ddf61f369f92b88ff9c755530e3

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
171e35fe5fd37ca850d3d1234d94e194

SHA1
06c040762d84de3a9ef76bc9e867598568cac28a

SHA256
17528e634c992a0b607fa14c088983183282bfa90d470e1ae95bff4763efd866

SHA512
b50d220a39213ebc9f27baf7d25ff6fec06f608bdd5794da8b600351b69b4c9c18cd2c151edde389b55ff3b95164247e63d763aa08b6b91ebc816dbd4858cf26

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