Analysis
- max time kernel
110s - max time network
112s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 20:35
Static task
static1
Behavioral task
behavioral1
Sample
VfOBvgKOYfjUG0t.exe
Resource
win7v20201028
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
VfOBvgKOYfjUG0t.exe
Resource
win10v20201028
0 signatures
0 seconds
General
- Target VfOBvgKOYfjUG0t.exe
- Size 1.1MB
- Sample201109-ce32dqtqjs
- SHA256 55761a62c31c4e4c1b063e22f06db5612dcd2542feafdec1328a38e557d1fe2d
- MD5 030bbb64a49cf4470bdd4ed49e27ef5c
- SHA1 a866905488ea1e452942fcc55d71182f0bab31ca
- SHA512 6034872e56324fff1b0779c501010b8b208bbab4df452a4484f55c37ed7935f55d7aa1e4b8b4fde5217273d388f9dc03529bad4eb3bd62350fbce3bb2febd52d
- MD5 SHA1 SHA512
Score
10/10
Malware Config
Extracted
Path
-
C:\Users\Admin\AppData\Local\Temp\109933CE9F\Log.txt
-
masslogger
Ransom Note
- ################################################################# MassLogger v1.3.5.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 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 9:34:18 PM MassLogger Started: 11/10/2020 9:34:15 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\VfOBvgKOYfjUG0t.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:
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 -
resource yara_rule behavioral2/memory/4768-9-0x00000000084A0000-0x0000000008552000-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-1-5-21-3341490333-719741536-2920803124-1000\Control Panel\International\Geo\Nation VfOBvgKOYfjUG0t.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 17 api.ipify.org - Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4768 set thread context of 1108 4768 VfOBvgKOYfjUG0t.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 856 schtasks.exe - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1108 VfOBvgKOYfjUG0t.exe - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1108 VfOBvgKOYfjUG0t.exe 1108 VfOBvgKOYfjUG0t.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1108 VfOBvgKOYfjUG0t.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1108 VfOBvgKOYfjUG0t.exe - Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 4768 wrote to memory of 856 4768 VfOBvgKOYfjUG0t.exe 78 PID 4768 wrote to memory of 856 4768 VfOBvgKOYfjUG0t.exe 78 PID 4768 wrote to memory of 856 4768 VfOBvgKOYfjUG0t.exe 78 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80 PID 4768 wrote to memory of 1108 4768 VfOBvgKOYfjUG0t.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\VfOBvgKOYfjUG0t.exe"C:\Users\Admin\AppData\Local\Temp\VfOBvgKOYfjUG0t.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4768 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uQFVQh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7BA9.tmp"2⤵
- Creates scheduled task(s)
PID:856
-
-
C:\Users\Admin\AppData\Local\Temp\VfOBvgKOYfjUG0t.exe"{path}"2⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1108
-