masslogger | d73a8914369631978fc02cc99a735298589a6ce95979176382caf8be4753c84e

General

Target
3f39da1d_extracted.exe
Size 642KB
Sample210216-j6ka8gsbcs
SHA256 d73a8914369631978fc02cc99a735298589a6ce95979176382caf8be4753c84e
MD5 fd4543e3f35c11ef0d889c228beacd23
SHA1 cbb7819178024077e13765a5a0e7b87bba39c312
SHA512 b2312b9ae4ec26bf43047cb9aa1fc82f89ef03e4ed6a3d9aeead859eb89137545a20321adb3005314fec4c3b6c4ba1b7db40283c8d4ec2ad9fb57b4900915b87
MD5 SHA1 SHA512

Score

10^/10

masslogger ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\109933CE9F\Log.txt

masslogger

Ransom Note

################################################################# MassLogger v1.3.2.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 10 Enterprise64bit CPU: Persocon Processor 2.5+ GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 2/16/2021 6:01:11 PM MassLogger Started: 2/16/2021 6:01:07 PM Interval: 6 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\3f39da1d_extracted.exe As Administrator: True

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\109933CE9F\Log.txt

masslogger

Ransom Note

################################################################# MassLogger v1.3.2.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 10 Enterprise64bit CPU: Persocon Processor 2.5+ GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 2/16/2021 6:01:11 PM MassLogger Started: 2/16/2021 6:01:07 PM Interval: 6 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\3f39da1d_extracted.exe As Administrator: True ### WD Exclusion ### Disabled

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger log file 2 IoCs

Detects a log file produced by MassLogger.

resource	yara_rule
	masslogger_log_file
behavioral2/files/0x000300000001a2df-23.dat	masslogger_log_file

Executes dropped EXE 1 IoCs

pid	Process
1860	vlc.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Control Panel\International\Geo\Nation	3f39da1d_extracted.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
19	api.ipify.org

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
640	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1316	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe
1148	3f39da1d_extracted.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1148	3f39da1d_extracted.exe
Token: SeDebugPrivilege	1860	vlc.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 2272	1148	3f39da1d_extracted.exe	79
PID 1148 wrote to memory of 2272	1148	3f39da1d_extracted.exe	79
PID 1148 wrote to memory of 2272	1148	3f39da1d_extracted.exe	79
PID 1148 wrote to memory of 2784	1148	3f39da1d_extracted.exe	80
PID 1148 wrote to memory of 2784	1148	3f39da1d_extracted.exe	80
PID 1148 wrote to memory of 2784	1148	3f39da1d_extracted.exe	80
PID 2784 wrote to memory of 1316	2784	cmd.exe	83
PID 2784 wrote to memory of 1316	2784	cmd.exe	83
PID 2784 wrote to memory of 1316	2784	cmd.exe	83
PID 2272 wrote to memory of 640	2272	cmd.exe	84
PID 2272 wrote to memory of 640	2272	cmd.exe	84
PID 2272 wrote to memory of 640	2272	cmd.exe	84
PID 2784 wrote to memory of 1860	2784	cmd.exe	85
PID 2784 wrote to memory of 1860	2784	cmd.exe	85
PID 2784 wrote to memory of 1860	2784	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\3f39da1d_extracted.exe
"C:\Users\Admin\AppData\Local\Temp\3f39da1d_extracted.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1148
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn vlc.exe /tr '"C:\Users\Admin\AppData\Roaming\VideoLAN\vlc.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2272
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn vlc.exe /tr '"C:\Users\Admin\AppData\Roaming\VideoLAN\vlc.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:640
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9909.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2784
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1316
- - C:\Users\Admin\AppData\Roaming\VideoLAN\vlc.exe
    "C:\Users\Admin\AppData\Roaming\VideoLAN\vlc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1860

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1148-7-0x0000000005610000-0x0000000005611000-memory.dmp

Download

memory/1148-5-0x0000000005560000-0x0000000005561000-memory.dmp

Download

memory/1148-3-0x0000000000C00000-0x0000000000C01000-memory.dmp

Download

memory/1148-6-0x0000000002EA0000-0x0000000002EA1000-memory.dmp

Download

memory/1148-8-0x0000000005F10000-0x0000000005F11000-memory.dmp

Download

memory/1148-9-0x0000000006580000-0x0000000006581000-memory.dmp

Download

memory/1148-2-0x0000000073450000-0x0000000073B3E000-memory.dmp

Download

memory/1860-18-0x0000000073450000-0x0000000073B3E000-memory.dmp

Download

memory/1860-21-0x0000000004FA0000-0x0000000004FA1000-memory.dmp

Download

memory/1860-22-0x00000000027D0000-0x00000000027D1000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads