wannacry | b4dd6f60a6849d8be3154de26e48482b8b0d4e5c22033783954126e4b4fdf874

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 21:47

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General

Target

250ae430b49bdd1562898d702c452af3.dll
Size

5.0MB
MD5

250ae430b49bdd1562898d702c452af3
SHA1

174f8cdb720423b02b6ccf5b31c98298f03b691d
SHA256

b4dd6f60a6849d8be3154de26e48482b8b0d4e5c22033783954126e4b4fdf874
SHA512

0841cfab944200b64c10bc9948f94c8e5a77dab72bd96a560f1227366fb3c84dd79aa4c3914d348c1aae2a43d90b956a66d03ca778ec5c5324b37c9e0d404328
SSDEEP

98304:d8cPoBhz1aRxcSUDk36SAEdhvxWa9P593R8yAVp2H:d8cPe1Cxcxk3ZAEUadzR8yc4H

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 (3230) 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
2764	mssecsvc.exe
2716	mssecsvc.exe
2680	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 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	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 1 IoCs

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

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2252 wrote to memory of 2692	2252	rundll32.exe	30
PID 2692 wrote to memory of 2764	2692	rundll32.exe	31
PID 2692 wrote to memory of 2764	2692	rundll32.exe	31
PID 2692 wrote to memory of 2764	2692	rundll32.exe	31
PID 2692 wrote to memory of 2764	2692	rundll32.exe	31
PID 2764 wrote to memory of 2680	2764	mssecsvc.exe	33
PID 2764 wrote to memory of 2680	2764	mssecsvc.exe	33
PID 2764 wrote to memory of 2680	2764	mssecsvc.exe	33
PID 2764 wrote to memory of 2680	2764	mssecsvc.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\250ae430b49bdd1562898d702c452af3.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\250ae430b49bdd1562898d702c452af3.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2764
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2680

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:2716

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
36a6816280fa05ccf0410403b43f7091

SHA1
cae9c542a2f5ba923c0025d943a11b389df6ef82

SHA256
b886a4f00a1d0a782334bac08a19dc24cf2cc4015191612ddd85b42b53fbe688

SHA512
42955aa0d3cd8671fe34c1b0e0c52f088b784bedd80625252acb4b7647158b3c857e5a5892b585551a937fde293886c7b47ba448ac6f4e3ceae114130be82481

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
72f53f9be5e49e89caed84a61110bf04

SHA1
bf1f973f83846be39d71fa969063ee1277c10636

SHA256
0e0f19ea3f851d5ebf2134ed6dfd9ca50051bb0eb09bcfdfd4e856318fb89cf2

SHA512
90b81ab777d1cb33f93005b6123afc6c0a2a29eeaa6de89634a6c749974cbaf827e6d24b5de5b26570d59ace4a3b68cbd235a6b97e89ee589e5b47c92bb96ea3

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