wannacry | 0a9871e01a9ef03a53c22bcc4eda250b74b319b96c85b3ecd8d90d997afd429a

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
30-09-2024 21:06

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General

Target

0a9871e01a9ef03a53c22bcc4eda250b74b319b96c85b3ecd8d90d997afd429aN.dll
Size

5.0MB
MD5

9f6f1b47b3ba1cbee37b5f9f0e38a270
SHA1

3c2f71c605ae76801e17ac290e81e62287a507c6
SHA256

0a9871e01a9ef03a53c22bcc4eda250b74b319b96c85b3ecd8d90d997afd429a
SHA512

5a69adf6cb5a529cd0cfe646b0fc1afacdaa29df0fd73a07f402bbf2f56198647ac02c0dcf428772ffb6ec2685a69d2f1572875c480de9dc67ada5204a699f3d
SSDEEP

98304:d8qPoBhz1aRxcSUDk36SAEdhvxWa9P59+AVp2H:d8qPe1Cxcxk3ZAEUadic4H

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (2461) 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
2668	mssecsvc.exe
2812	mssecsvc.exe
2752	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\tasksche.exe	mssecsvc.exe
File created	C:\WINDOWS\mssecsvc.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	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 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2308 wrote to memory of 2212	2308	rundll32.exe	31
PID 2212 wrote to memory of 2668	2212	rundll32.exe	32
PID 2212 wrote to memory of 2668	2212	rundll32.exe	32
PID 2212 wrote to memory of 2668	2212	rundll32.exe	32
PID 2212 wrote to memory of 2668	2212	rundll32.exe	32

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0a9871e01a9ef03a53c22bcc4eda250b74b319b96c85b3ecd8d90d997afd429aN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2308
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\0a9871e01a9ef03a53c22bcc4eda250b74b319b96c85b3ecd8d90d997afd429aN.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2212
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2668
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2752

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:2812

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
d24aecc026fb66454e378c6830ba0ef7

SHA1
3de87d859e7c009f9b3d5e8f4d61d702f60e82ef

SHA256
d51cd75366c945c3ff3bfc533ac372415d22c57c32a8093ff02f53894167d41b

SHA512
addaf41cee37f25545bc72b021e59eacf95c42c1fc5ce568992c9cc746258d1005746d76474cf654af9013a3012ce7a4de0fbb5f8e6a84a2b07887ca47157bb4

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
7ee04e6162e23a13c3db922e54f8e9c7

SHA1
89b2b17525e31e5203add828e1326bea1e248e9c

SHA256
fe01d1c0c9baac6bd76f69c36ad5c47591fa16467877a52849aa831b3f0b4a08

SHA512
0f7d2a303c8aca256c89592664456caa8434b043a5e6bc43fc6da073c648774de3af255613cdd0b07d7eb42697b1dfaeedb6d96888049704eff29b203c89211a

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