wannacry | 86cded2cc474e1f32dac83ca142bc440daa0a7484213589b696bb1681795a738

Resubmissions

02-12-2024 09:20

241202-lasbmsvlaq 10

01-12-2024 23:21

241201-3b9ezsxkex 10

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
01-12-2024 23:21

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General

Target

86cded2cc474e1f32dac83ca142bc440daa0a7484213589b696bb1681795a738N.dll
Size

5.0MB
MD5

3cbbc2d6ce90308b889a3fa506a98880
SHA1

1400cdbf4f4b8fae82768479a7bdd39a7df8bf91
SHA256

86cded2cc474e1f32dac83ca142bc440daa0a7484213589b696bb1681795a738
SHA512

8fb316328a4da1cc8824b661a9f8ae317dfcddfa132398544c3e2ce23af611b5a0ebcb596d8fe8f56eaf641621ad2299cd7405b1004965709ac257d310abbea1
SSDEEP

24576:JbLgdelLgiHIIBA7Od057/hZWI86X6LBhiLeTLQD2ou:JnjNgmDQTujbwEK

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 (2508) 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 2 IoCs

pid	Process
2704	mssecsvc.exe
2820	mssecsvc.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	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 11 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2168 wrote to memory of 2684	2168	rundll32.exe	30
PID 2684 wrote to memory of 2704	2684	rundll32.exe	31
PID 2684 wrote to memory of 2704	2684	rundll32.exe	31
PID 2684 wrote to memory of 2704	2684	rundll32.exe	31
PID 2684 wrote to memory of 2704	2684	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\86cded2cc474e1f32dac83ca142bc440daa0a7484213589b696bb1681795a738N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\86cded2cc474e1f32dac83ca142bc440daa0a7484213589b696bb1681795a738N.dll,#1
  2⤵
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2684
- - C:\WINDOWS\mssecsvc.exe
    C:\WINDOWS\mssecsvc.exe
    3⤵
    - Executes dropped EXE
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2704

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:2820

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

Replay Monitor

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Downloads

C:\Windows\mssecsvc.exe

Filesize
3.6MB

MD5
7d180f6cb4f1886d777e4e64e0ff7cbb

SHA1
a302c4e6f5e5558a1e0014e73a5c5a3db0a3f89e

SHA256
ddc9263c94a44620bd3588f1f6ad130c7a797986c775d4724274587b5a22216e

SHA512
e3f286d920cf936b7754dfe0003b67487499f03827dab2ca2c34083052a8d462dcf7b56c4812d7e8c6d6dada61ca0ff9da3326169c4da35cc6a11bfd41cd143a

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