Analysis
- max time kernel
120s - max time network
120s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 20:35
Static task
static1
Behavioral task
behavioral1
Sample
DU0YWKqWYRdmotp.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
DU0YWKqWYRdmotp.exe
Resource
win10v20201028
General
- Target DU0YWKqWYRdmotp.exe
- Size 899KB
- Sample201109-9kxrec5wex
- SHA256 397dd4bc6657e428ed2b5d3bcf09d3409d943796cfe5d096583c85ff8a3340b1
- MD5 3b53beee5f54bb4ad9b4d35e82b5ffd4
- SHA1 1b6bc92c62176f001822fd909fe52014ab1d58e7
- SHA512 a34e70dfbd167c9e285cfad54aa19e12f7a44cad58c68b2ca783155bcbb10a5f4827eb84dda3401094930d0eccb1687c20762ea4fab68401bdac17d97d1eeb28
- MD5 SHA1 SHA512
Malware Config
Extracted
-
C:\Users\Admin\AppData\Local\Temp\7C372DB998\Log.txt
-
masslogger
- ################################################################# MassLogger v1.3.5.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 Location: United States OS: Microsoft Windows 10 Pro64bit CPU: Persocon Processor 2.5+ GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 11/10/2020 10:33:29 PM MassLogger Started: 11/10/2020 10:33:24 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\DU0YWKqWYRdmotp.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:
Extracted
-
Protocol
smtp
-
Host
mail.privateemail.com
-
Port
587
-
Username
-
Password
MoreGrace@#
Signatures
- MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.
yara_rule masslogger_log_file - ServiceHost packer 1 IoCs
Detects ServiceHost packer used for .NET malware
resource yara_rule behavioral2/memory/936-6-0x0000000007990000-0x0000000007992000-memory.dmp servicehost -
resource yara_rule behavioral2/memory/936-8-0x000000000AE70000-0x000000000AF22000-memory.dmp rezer0 - Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation DU0YWKqWYRdmotp.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- 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 18 api.ipify.org - Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 936 set thread context of 3428 936 DU0YWKqWYRdmotp.exe 80 - Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3700 schtasks.exe - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3428 DU0YWKqWYRdmotp.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3428 DU0YWKqWYRdmotp.exe 3428 DU0YWKqWYRdmotp.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3428 DU0YWKqWYRdmotp.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3428 DU0YWKqWYRdmotp.exe - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 936 wrote to memory of 3700 936 DU0YWKqWYRdmotp.exe 78 PID 936 wrote to memory of 3700 936 DU0YWKqWYRdmotp.exe 78 PID 936 wrote to memory of 3700 936 DU0YWKqWYRdmotp.exe 78 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80 PID 936 wrote to memory of 3428 936 DU0YWKqWYRdmotp.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\DU0YWKqWYRdmotp.exe"C:\Users\Admin\AppData\Local\Temp\DU0YWKqWYRdmotp.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:936 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\biBVyqeRbsm" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBE6F.tmp"2⤵
- Creates scheduled task(s)
PID:3700
-
-
C:\Users\Admin\AppData\Local\Temp\DU0YWKqWYRdmotp.exe"{path}"2⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3428
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