Analysis
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max time kernel
4294183s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20220310-en -
submitted
13-03-2022 09:33
Static task
static1
Behavioral task
behavioral1
Sample
f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe
Resource
win7-20220310-en
Behavioral task
behavioral2
Sample
f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe
Resource
win10v2004-en-20220113
General
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Target
f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe
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Size
549KB
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MD5
376fe5034ac55ecf08bbd54b14e3458a
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SHA1
09b537109862bfaff6f9df62ad09b8f395cd866d
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SHA256
f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df
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SHA512
a3bb779d41db84d0e45c4da1d6483beb0b12af85546bbdeb5734dcfde55311ab117eecf78276b35b4000171189e1eeb299180b6a4068016b75ea8c554b45b13f
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 2 IoCs
resource yara_rule behavioral1/memory/1660-63-0x0000000000400000-0x0000000000470000-memory.dmp family_isrstealer behavioral1/memory/1660-65-0x0000000000400000-0x0000000000470000-memory.dmp family_isrstealer -
NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients
resource yara_rule behavioral1/memory/1576-115-0x0000000000400000-0x000000000041F000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 2 IoCs
Password recovery tool for various web browsers
resource yara_rule behavioral1/memory/1896-93-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView behavioral1/memory/1896-112-0x0000000000400000-0x0000000000454000-memory.dmp WebBrowserPassView -
Nirsoft 4 IoCs
resource yara_rule behavioral1/memory/1896-93-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral1/memory/1896-112-0x0000000000400000-0x0000000000454000-memory.dmp Nirsoft behavioral1/memory/1712-116-0x0000000000400000-0x0000000000426000-memory.dmp Nirsoft behavioral1/memory/1576-115-0x0000000000400000-0x000000000041F000-memory.dmp Nirsoft -
Executes dropped EXE 5 IoCs
pid Process 1660 cvtres.exe 1904 cvtres.exe 1896 cvtres.exe 1712 cvtres.exe 1576 cvtres.exe -
resource yara_rule behavioral1/memory/1712-100-0x0000000000400000-0x0000000000426000-memory.dmp upx behavioral1/memory/1576-106-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral1/memory/1712-113-0x0000000000400000-0x0000000000426000-memory.dmp upx behavioral1/memory/1576-114-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral1/memory/1712-116-0x0000000000400000-0x0000000000426000-memory.dmp upx behavioral1/memory/1576-115-0x0000000000400000-0x000000000041F000-memory.dmp upx -
Loads dropped DLL 5 IoCs
pid Process 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 1660 cvtres.exe 1904 cvtres.exe 1904 cvtres.exe 1904 cvtres.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 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2932610838-281738825-1127631353-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts cvtres.exe -
Suspicious use of SetThreadContext 5 IoCs
description pid Process procid_target PID 536 set thread context of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 1660 set thread context of 1904 1660 cvtres.exe 28 PID 1904 set thread context of 1896 1904 cvtres.exe 29 PID 1904 set thread context of 1712 1904 cvtres.exe 30 PID 1904 set thread context of 1576 1904 cvtres.exe 31 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 1660 cvtres.exe 1660 cvtres.exe 1660 cvtres.exe 1660 cvtres.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe Token: SeDebugPrivilege 1712 cvtres.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1660 cvtres.exe -
Suspicious use of WriteProcessMemory 38 IoCs
description pid Process procid_target PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 536 wrote to memory of 1660 536 f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe 27 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1660 wrote to memory of 1904 1660 cvtres.exe 28 PID 1904 wrote to memory of 1896 1904 cvtres.exe 29 PID 1904 wrote to memory of 1896 1904 cvtres.exe 29 PID 1904 wrote to memory of 1896 1904 cvtres.exe 29 PID 1904 wrote to memory of 1896 1904 cvtres.exe 29 PID 1904 wrote to memory of 1896 1904 cvtres.exe 29 PID 1904 wrote to memory of 1896 1904 cvtres.exe 29 PID 1904 wrote to memory of 1712 1904 cvtres.exe 30 PID 1904 wrote to memory of 1712 1904 cvtres.exe 30 PID 1904 wrote to memory of 1712 1904 cvtres.exe 30 PID 1904 wrote to memory of 1712 1904 cvtres.exe 30 PID 1904 wrote to memory of 1712 1904 cvtres.exe 30 PID 1904 wrote to memory of 1712 1904 cvtres.exe 30 PID 1904 wrote to memory of 1576 1904 cvtres.exe 31 PID 1904 wrote to memory of 1576 1904 cvtres.exe 31 PID 1904 wrote to memory of 1576 1904 cvtres.exe 31 PID 1904 wrote to memory of 1576 1904 cvtres.exe 31 PID 1904 wrote to memory of 1576 1904 cvtres.exe 31 PID 1904 wrote to memory of 1576 1904 cvtres.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe"C:\Users\Admin\AppData\Local\Temp\f47c8f408d8b654fb111d22937ad2445a6b2deeb3b6008a23a54d9520ca6c5df.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:536 -
C:\Users\Admin\AppData\Local\Temp\cvtres.exeC:\Users\Admin\AppData\Local\Temp\\cvtres.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1660 -
C:\Users\Admin\AppData\Local\Temp\cvtres.exe"C:\Users\Admin\AppData\Local\Temp\cvtres.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1904 -
C:\Users\Admin\AppData\Local\Temp\cvtres.exe"C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp4⤵
- Executes dropped EXE
PID:1896
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C:\Users\Admin\AppData\Local\Temp\cvtres.exe"C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1712
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C:\Users\Admin\AppData\Local\Temp\cvtres.exe"C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp4⤵
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
PID:1576
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