wannacry | deb01890f1ee68d9dad5e1cbd83b335d05e49d9d3a8afed9aedbca3f58576199

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
17-10-2024 02:17

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General

Target

deb01890f1ee68d9dad5e1cbd83b335d05e49d9d3a8afed9aedbca3f58576199.dll
Size

5.0MB
MD5

3f4a0b6e1b81aa64cd0653814a5f87db
SHA1

1923a8c8784551bb0f4d4ff9154fd4ced6c36f64
SHA256

deb01890f1ee68d9dad5e1cbd83b335d05e49d9d3a8afed9aedbca3f58576199
SHA512

b5e644537758e27eb586ff55cde5baffe8f0c67d9e40e855f76ce13f2eb323a9fd12643fea5498b8e24fe835c45bdb3d8d2ebecf4b35cbc0d1b3ad3eecacf222
SSDEEP

24576:JbLgdeQhfdmMSirYbcMNgef0QeQjG/D8kIqc+9kEmzKAxGqcCZ:JnjQqMSPbcBVQej/1IKQB

Score

10^/10

wannacry discovery ransomware worm

Malware Config

Signatures

Wannacry
WannaCry is a ransomware cryptoworm.
ransomware worm wannacry
Contacts a large (3324) 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

Processes:

mssecsvc.exemssecsvc.exetasksche.exe

pid	Process
1212	mssecsvc.exe
1984	mssecsvc.exe
2224	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

Processes:

mssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exe

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

Processes:

rundll32.exemssecsvc.exemssecsvc.exe

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

Processes:

mssecsvc.exe

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

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	Process	procid_target
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1620 wrote to memory of 1900	1620	rundll32.exe	30
PID 1900 wrote to memory of 1212	1900	rundll32.exe	31
PID 1900 wrote to memory of 1212	1900	rundll32.exe	31
PID 1900 wrote to memory of 1212	1900	rundll32.exe	31
PID 1900 wrote to memory of 1212	1900	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\deb01890f1ee68d9dad5e1cbd83b335d05e49d9d3a8afed9aedbca3f58576199.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\deb01890f1ee68d9dad5e1cbd83b335d05e49d9d3a8afed9aedbca3f58576199.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1900
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:1212
  - - C:\WINDOWS\tasksche.exe
      C:\WINDOWS\tasksche.exe /i
      4⤵
      Executes dropped EXE
      PID:2224

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:1984

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
2881dcec8784a58b7ca35526929f06f0

SHA1
e74c5e828031d5df27a8db840146d2a7dfa90874

SHA256
4028d63190bab7ed15140842ce0e0bfac2772bbf528ffa76cd55b97f5004a378

SHA512
851220c1dcf98befefdb3f244abeecfb53ecaca4488c1670b578abae3aa5539a9c4cc7fbf3a127460326c21dc1aeaa5386c91513afab3ffccb52d329ba46e374

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C:\Windows\tasksche.exe

Filesize
3.4MB

MD5
5b9b946ff68efdec98f3be57f92e427b

SHA1
8bf852917b57079a2caa87029848c6f2e84c51ec

SHA256
80a7bd6d9a7b5945f66478e9a5ff96a91a28c64336f5245e7f7fc2aeaa752b01

SHA512
4702c354f68048d32678452052718f401fa9a90e024ea54c337866faf22a92ecacba9c73dc8fb5dc4a8ae8e74be0c3ad44d06783f14bd4bb0c60554ba232f75c

Download Submit