5820abec5cc816c874da117ec77dd83e080e90fad2ae0112c76febfc40e78b83

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7v20201028
submitted
30/12/2020, 08:44

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
4945aabc582ad5ec866f0ae4497f8510.exe
Size 368KB
Sample201230-rengner7wx
SHA256 5820abec5cc816c874da117ec77dd83e080e90fad2ae0112c76febfc40e78b83
MD5 4945aabc582ad5ec866f0ae4497f8510
SHA1 2ac9702dae6f1a832eb19ba46256fafaa04eb9c6
SHA512 763408b7fbb2a50d90e9b84967742f73bd3ad0bf2e5f754a25fd409851670d0c0dbe8b565ca22fa7f84957d6642837cadf8c6eec1548526505df01e06a467238
MD5 SHA1 SHA512

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

flow	pid	Process
13	1472	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
1372	nethelper.exe

Loads dropped DLL 4 IoCs

pid	Process
1472	rundll32.exe
1472	rundll32.exe
1472	rundll32.exe
1472	rundll32.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
436	schtasks.exe
1176	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
928	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1472	rundll32.exe

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1704	1972	4945aabc582ad5ec866f0ae4497f8510.exe	29
PID 1972 wrote to memory of 1704	1972	4945aabc582ad5ec866f0ae4497f8510.exe	29
PID 1972 wrote to memory of 1704	1972	4945aabc582ad5ec866f0ae4497f8510.exe	29
PID 1972 wrote to memory of 1704	1972	4945aabc582ad5ec866f0ae4497f8510.exe	29
PID 1972 wrote to memory of 1656	1972	4945aabc582ad5ec866f0ae4497f8510.exe	31
PID 1972 wrote to memory of 1656	1972	4945aabc582ad5ec866f0ae4497f8510.exe	31
PID 1972 wrote to memory of 1656	1972	4945aabc582ad5ec866f0ae4497f8510.exe	31
PID 1972 wrote to memory of 1656	1972	4945aabc582ad5ec866f0ae4497f8510.exe	31
PID 1656 wrote to memory of 928	1656	cmd.exe	34
PID 1656 wrote to memory of 928	1656	cmd.exe	34
PID 1656 wrote to memory of 928	1656	cmd.exe	34
PID 1656 wrote to memory of 928	1656	cmd.exe	34
PID 1704 wrote to memory of 1212	1704	cmd.exe	33
PID 1704 wrote to memory of 1212	1704	cmd.exe	33
PID 1704 wrote to memory of 1212	1704	cmd.exe	33
PID 1704 wrote to memory of 1212	1704	cmd.exe	33
PID 1972 wrote to memory of 964	1972	4945aabc582ad5ec866f0ae4497f8510.exe	37
PID 1972 wrote to memory of 964	1972	4945aabc582ad5ec866f0ae4497f8510.exe	37
PID 1972 wrote to memory of 964	1972	4945aabc582ad5ec866f0ae4497f8510.exe	37
PID 1972 wrote to memory of 964	1972	4945aabc582ad5ec866f0ae4497f8510.exe	37
PID 1972 wrote to memory of 368	1972	4945aabc582ad5ec866f0ae4497f8510.exe	39
PID 1972 wrote to memory of 368	1972	4945aabc582ad5ec866f0ae4497f8510.exe	39
PID 1972 wrote to memory of 368	1972	4945aabc582ad5ec866f0ae4497f8510.exe	39
PID 1972 wrote to memory of 368	1972	4945aabc582ad5ec866f0ae4497f8510.exe	39
PID 964 wrote to memory of 776	964	cmd.exe	41
PID 964 wrote to memory of 776	964	cmd.exe	41
PID 964 wrote to memory of 776	964	cmd.exe	41
PID 964 wrote to memory of 776	964	cmd.exe	41
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 368 wrote to memory of 1472	368	cmd.exe	42
PID 1656 wrote to memory of 436	1656	cmd.exe	43
PID 1656 wrote to memory of 436	1656	cmd.exe	43
PID 1656 wrote to memory of 436	1656	cmd.exe	43
PID 1656 wrote to memory of 436	1656	cmd.exe	43
PID 1472 wrote to memory of 1212	1472	rundll32.exe	44
PID 1472 wrote to memory of 1212	1472	rundll32.exe	44
PID 1472 wrote to memory of 1212	1472	rundll32.exe	44
PID 1472 wrote to memory of 1212	1472	rundll32.exe	44
PID 1212 wrote to memory of 1176	1212	cmd.exe	46
PID 1212 wrote to memory of 1176	1212	cmd.exe	46
PID 1212 wrote to memory of 1176	1212	cmd.exe	46
PID 1212 wrote to memory of 1176	1212	cmd.exe	46
PID 776 wrote to memory of 1372	776	taskeng.exe	49
PID 776 wrote to memory of 1372	776	taskeng.exe	49
PID 776 wrote to memory of 1372	776	taskeng.exe	49
PID 776 wrote to memory of 1372	776	taskeng.exe	49

C:\Users\Admin\AppData\Local\Temp\4945aabc582ad5ec866f0ae4497f8510.exe
"C:\Users\Admin\AppData\Local\Temp\4945aabc582ad5ec866f0ae4497f8510.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH /f
    3⤵
    PID:1212
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C timeout /t 60 && SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH\nethelper.exe /F
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1656
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 60
    3⤵
    - Delays execution with timeout.exe
    PID:928
- - C:\Windows\SysWOW64\schtasks.exe
    SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH\nethelper.exe /F
    3⤵
    - Creates scheduled task(s)
    PID:436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH\nethelper.dll /f && EXIT 0
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:964
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH\nethelper.dll /f
    3⤵
    PID:776
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C rundll32.exe C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH\nethelper.dll, UserModeExport
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:368
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\ProgramData\NetHelper\Cache\GvKywLbjGlcWUsQfTKOH\nethelper.dll, UserModeExport
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1472
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\System32\cmd.exe /C SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\Users\Admin\AppData\Local\Temp\nethelper.exe /F
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1212
    - - C:\Windows\SysWOW64\schtasks.exe
        
        SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\Users\Admin\AppData\Local\Temp\nethelper.exe /F
        5⤵
        Creates scheduled task(s)
        
        PID:1176

C:\Windows\system32\taskeng.exe
taskeng.exe {D055E7EE-B30F-4642-A773-53A6AF3514D5} S-1-5-21-3825035466-2522850611-591511364-1000:EIDQHRRL\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:776
- C:\Users\Admin\AppData\Local\Temp\nethelper.exe
  C:\Users\Admin\AppData\Local\Temp\nethelper.exe
  2⤵
  - Executes dropped EXE
  PID:1372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/824-8-0x000007FEF5E90000-0x000007FEF610A000-memory.dmp

Download

memory/1972-2-0x0000000004E6A000-0x0000000004E6B000-memory.dmp

Download

memory/1972-3-0x00000000050F0000-0x0000000005101000-memory.dmp

Download