Analysis
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max time kernel
110s -
max time network
113s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
08-01-2025 04:45
Static task
static1
Behavioral task
behavioral1
Sample
a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
Resource
win10v2004-20241007-en
General
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Target
a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe
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Size
368KB
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MD5
2166580cdb35ef98a1683cb172717a16
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SHA1
2289422b25f1fc9d7bd7de41790928f698c33a4f
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SHA256
a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17
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SHA512
faff7258e3526dd490a0dc825d898fbe1839be2c1b690688b55d89b8e12ea6fb7026721924ba8471ba2c668452931f26d8f8be9189d521c647fc0e5cf7db4365
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SSDEEP
6144:bYXlu7PKTgM8jlcud0oTPP/eqTNYDWyys9YIusnowR/gVxoCiLXcisNC79FPQ2HF:2rTgM8j6QxNpyVY6/gV8Ft
Malware Config
Signatures
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ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
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ISR Stealer payload 4 IoCs
resource yara_rule behavioral2/memory/3164-13-0x0000000000400000-0x0000000000459000-memory.dmp family_isrstealer behavioral2/files/0x0007000000023cac-24.dat family_isrstealer behavioral2/memory/3164-61-0x0000000000400000-0x0000000000459000-memory.dmp family_isrstealer behavioral2/memory/1660-105-0x0000000000400000-0x0000000000459000-memory.dmp family_isrstealer -
Isrstealer family
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Detected Nirsoft tools 7 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
resource yara_rule behavioral2/memory/4180-51-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral2/memory/4180-57-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral2/memory/4180-55-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral2/memory/4180-59-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral2/memory/4072-97-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral2/memory/4072-101-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral2/memory/4072-99-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft -
NirSoft WebBrowserPassView 7 IoCs
Password recovery tool for various web browsers
resource yara_rule behavioral2/memory/4180-51-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral2/memory/4180-57-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral2/memory/4180-55-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral2/memory/4180-59-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral2/memory/4072-97-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral2/memory/4072-101-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral2/memory/4072-99-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView -
Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\ Host.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\StubPath = "'C:\\Users\\Admin\\AppData\\Roaming\\Host.exe'" Host.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe Key value queried \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe Key value queried \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation Host.exe -
Executes dropped EXE 9 IoCs
pid Process 908 Host.exe 3560 CVGCW.exe 1544 CVGCW.exe 4180 CVGCW.exe 1660 Host.exe 4972 Host.exe 4376 CVGBW.exe 316 CVGBW.exe 4072 CVGBW.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Samadbond = "C:\\Users\\Admin\\AppData\\Roaming\\Host.exe" Host.exe -
Suspicious use of SetThreadContext 8 IoCs
description pid Process procid_target PID 1396 set thread context of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 set thread context of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 3560 set thread context of 1544 3560 CVGCW.exe 87 PID 1544 set thread context of 4180 1544 CVGCW.exe 88 PID 908 set thread context of 1660 908 Host.exe 89 PID 908 set thread context of 4972 908 Host.exe 90 PID 4376 set thread context of 316 4376 CVGBW.exe 92 PID 316 set thread context of 4072 316 CVGBW.exe 93 -
resource yara_rule behavioral2/memory/3164-7-0x0000000000400000-0x0000000000459000-memory.dmp upx behavioral2/memory/3164-8-0x0000000000400000-0x0000000000459000-memory.dmp upx behavioral2/memory/3164-13-0x0000000000400000-0x0000000000459000-memory.dmp upx behavioral2/memory/3164-61-0x0000000000400000-0x0000000000459000-memory.dmp upx behavioral2/memory/1660-105-0x0000000000400000-0x0000000000459000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 12 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Host.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CVGCW.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CVGCW.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CVGBW.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CVGCW.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Host.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Host.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CVGBW.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CVGBW.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 3560 CVGCW.exe 3560 CVGCW.exe 3560 CVGCW.exe 3560 CVGCW.exe 3560 CVGCW.exe 3560 CVGCW.exe 3560 CVGCW.exe 3560 CVGCW.exe 4376 CVGBW.exe 4376 CVGBW.exe 4376 CVGBW.exe 4376 CVGBW.exe 4376 CVGBW.exe 4376 CVGBW.exe 4376 CVGBW.exe 4376 CVGBW.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 3164 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 908 Host.exe 3560 CVGCW.exe 1660 Host.exe 4376 CVGBW.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 3164 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 82 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 1396 wrote to memory of 4304 1396 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 83 PID 3164 wrote to memory of 3560 3164 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 85 PID 3164 wrote to memory of 3560 3164 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 85 PID 3164 wrote to memory of 3560 3164 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 85 PID 4304 wrote to memory of 908 4304 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 84 PID 4304 wrote to memory of 908 4304 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 84 PID 4304 wrote to memory of 908 4304 a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe 84 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 3560 wrote to memory of 1544 3560 CVGCW.exe 87 PID 1544 wrote to memory of 4180 1544 CVGCW.exe 88 PID 1544 wrote to memory of 4180 1544 CVGCW.exe 88 PID 1544 wrote to memory of 4180 1544 CVGCW.exe 88 PID 1544 wrote to memory of 4180 1544 CVGCW.exe 88 PID 1544 wrote to memory of 4180 1544 CVGCW.exe 88 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 1660 908 Host.exe 89 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 908 wrote to memory of 4972 908 Host.exe 90 PID 1660 wrote to memory of 4376 1660 Host.exe 91 PID 1660 wrote to memory of 4376 1660 Host.exe 91 PID 1660 wrote to memory of 4376 1660 Host.exe 91 PID 4376 wrote to memory of 316 4376 CVGBW.exe 92 PID 4376 wrote to memory of 316 4376 CVGBW.exe 92 PID 4376 wrote to memory of 316 4376 CVGBW.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1396 -
C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"2⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3164 -
C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3560 -
C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1544 -
C:\Users\Admin\AppData\Local\Temp\CVGCW.exe"C:\Users\Admin\AppData\Local\Temp\CVGCW.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4180
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C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe"2⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4304 -
C:\Users\Admin\AppData\Roaming\Host.exe"C:\Users\Admin\AppData\Roaming\Host.exe" C:\Users\Admin\AppData\Local\Temp\a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17.exe3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:908 -
C:\Users\Admin\AppData\Roaming\Host.exe"C:\Users\Admin\AppData\Roaming\Host.exe"4⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1660 -
C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4376 -
C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"6⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
PID:316 -
C:\Users\Admin\AppData\Local\Temp\CVGBW.exe"C:\Users\Admin\AppData\Local\Temp\CVGBW.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp7⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4072
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C:\Users\Admin\AppData\Roaming\Host.exe"C:\Users\Admin\AppData\Roaming\Host.exe"4⤵
- Boot or Logon Autostart Execution: Active Setup
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:4972
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Privilege Escalation
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
320KB
MD5ccc2260269cb43ddadda9444e3d112f7
SHA1ddab46acc12d7c60a15fa363f88030f1dd539fcb
SHA2568ca1bd039407381c33fb7ab570b6e95b0ce64b0d5ef64a1968f9b55647cc1911
SHA512787d0b4f5d89b840a4917c78e46f963c8c96a96ec005b45d085222ef307c2a76f074c4a65ca033b038e1b7d1419c7cd3c5c5f3075c3ea24e546c68bdd7643fde
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Filesize
54B
MD5c10dbeca73f8835240e08e4511284b83
SHA10032f8f941cc07768189ca6ba32b1beede6b6917
SHA2560b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e
SHA51234f7ab8b4ab7b4996b82ffc49198103ef245ee7dd5ccfec793a9ee391b9e9bb30bd3916b4ebeaa9c66a4b5ca42f8572418f16dc83d41073bc94389c19916b967
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Filesize
368KB
MD52166580cdb35ef98a1683cb172717a16
SHA12289422b25f1fc9d7bd7de41790928f698c33a4f
SHA256a5c93ad708ec5f3be2e8de6957349d3d1f844a20046029fa4a6d74c371c93a17
SHA512faff7258e3526dd490a0dc825d898fbe1839be2c1b690688b55d89b8e12ea6fb7026721924ba8471ba2c668452931f26d8f8be9189d521c647fc0e5cf7db4365