5820abec5cc816c874da117ec77dd83e080e90fad2ae0112c76febfc40e78b83

Analysis

max time kernel
148s
max time network
148s
platform
windows10_x64
resource
win10v20201028
submitted
30/12/2020, 08:44

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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
25	1476	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
2728	nethelper.exe

Loads dropped DLL 1 IoCs

pid	Process
1476	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
2108	schtasks.exe
2380	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
976	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1476	rundll32.exe
1476	rundll32.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4764 wrote to memory of 2160	4764	4945aabc582ad5ec866f0ae4497f8510.exe	78
PID 4764 wrote to memory of 2160	4764	4945aabc582ad5ec866f0ae4497f8510.exe	78
PID 4764 wrote to memory of 2160	4764	4945aabc582ad5ec866f0ae4497f8510.exe	78
PID 4764 wrote to memory of 3172	4764	4945aabc582ad5ec866f0ae4497f8510.exe	80
PID 4764 wrote to memory of 3172	4764	4945aabc582ad5ec866f0ae4497f8510.exe	80
PID 4764 wrote to memory of 3172	4764	4945aabc582ad5ec866f0ae4497f8510.exe	80
PID 2160 wrote to memory of 816	2160	cmd.exe	82
PID 2160 wrote to memory of 816	2160	cmd.exe	82
PID 2160 wrote to memory of 816	2160	cmd.exe	82
PID 3172 wrote to memory of 976	3172	cmd.exe	83
PID 3172 wrote to memory of 976	3172	cmd.exe	83
PID 3172 wrote to memory of 976	3172	cmd.exe	83
PID 4764 wrote to memory of 8	4764	4945aabc582ad5ec866f0ae4497f8510.exe	84
PID 4764 wrote to memory of 8	4764	4945aabc582ad5ec866f0ae4497f8510.exe	84
PID 4764 wrote to memory of 8	4764	4945aabc582ad5ec866f0ae4497f8510.exe	84
PID 4764 wrote to memory of 1076	4764	4945aabc582ad5ec866f0ae4497f8510.exe	87
PID 4764 wrote to memory of 1076	4764	4945aabc582ad5ec866f0ae4497f8510.exe	87
PID 4764 wrote to memory of 1076	4764	4945aabc582ad5ec866f0ae4497f8510.exe	87
PID 1076 wrote to memory of 1476	1076	cmd.exe	88
PID 1076 wrote to memory of 1476	1076	cmd.exe	88
PID 1076 wrote to memory of 1476	1076	cmd.exe	88
PID 8 wrote to memory of 1504	8	cmd.exe	89
PID 8 wrote to memory of 1504	8	cmd.exe	89
PID 8 wrote to memory of 1504	8	cmd.exe	89
PID 3172 wrote to memory of 2108	3172	cmd.exe	90
PID 3172 wrote to memory of 2108	3172	cmd.exe	90
PID 3172 wrote to memory of 2108	3172	cmd.exe	90
PID 1476 wrote to memory of 932	1476	rundll32.exe	91
PID 1476 wrote to memory of 932	1476	rundll32.exe	91
PID 1476 wrote to memory of 932	1476	rundll32.exe	91
PID 932 wrote to memory of 2380	932	cmd.exe	93
PID 932 wrote to memory of 2380	932	cmd.exe	93
PID 932 wrote to memory of 2380	932	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\4945aabc582ad5ec866f0ae4497f8510.exe
"C:\Users\Admin\AppData\Local\Temp\4945aabc582ad5ec866f0ae4497f8510.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4764
- 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\TVDbKOpawxIqwRxzrDFO /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2160
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\TVDbKOpawxIqwRxzrDFO /f
    3⤵
    PID:816
- 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\TVDbKOpawxIqwRxzrDFO\´Ònethelper.exe /F
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3172
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 60
    3⤵
    - Delays execution with timeout.exe
    PID:976
- - C:\Windows\SysWOW64\schtasks.exe
    SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\ProgramData\NetHelper\Cache\TVDbKOpawxIqwRxzrDFO\´Ònethelper.exe /F
    3⤵
    - Creates scheduled task(s)
    PID:2108
- 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\TVDbKOpawxIqwRxzrDFO\nethelper.dll /f && EXIT 0
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:8
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\TVDbKOpawxIqwRxzrDFO\nethelper.dll /f
    3⤵
    PID:1504
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C rundll32.exe C:\ProgramData\NetHelper\Cache\TVDbKOpawxIqwRxzrDFO\nethelper.dll, UserModeExport
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1076
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\ProgramData\NetHelper\Cache\TVDbKOpawxIqwRxzrDFO\nethelper.dll, UserModeExport
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1476
  - - 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:932
    - - 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:2380

C:\Users\Admin\AppData\Local\Temp\nethelper.exe
C:\Users\Admin\AppData\Local\Temp\nethelper.exe
1⤵
- Executes dropped EXE
PID:2728

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

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Downloads

memory/4764-2-0x0000000005096000-0x0000000005097000-memory.dmp

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memory/4764-3-0x0000000005400000-0x0000000005401000-memory.dmp

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