Analysis
-
max time kernel
97s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
01-10-2022 23:52
Static task
static1
Behavioral task
behavioral1
Sample
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe
Resource
win10v2004-20220812-en
General
-
Target
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe
-
Size
340KB
-
MD5
dfe4a1cd1e822fba707b9d20017d0084
-
SHA1
e273c86578c9207b08c5d0517438cef0677a0330
-
SHA256
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b
-
SHA512
7e57b2e54741952da97c0c82631aba1a16dcbc797ff8500b3ae0f4d431e2d73ba742fb41378a3e61cafc96829a3c1a37be7c339780ed640d3c5eb6c5bce62c49
-
SSDEEP
6144:PXUQPN4gKo6iLoHIZvHPfrDW/MAfxitOW3IVhoOtmKWJVSFS1/uLJI:PigKoBcHWry/bjI2IVu
Malware Config
Signatures
-
ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
-
ISR Stealer payload 4 IoCs
Processes:
resource yara_rule behavioral2/memory/3440-135-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer behavioral2/memory/3440-137-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer behavioral2/memory/3440-149-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer behavioral2/memory/3440-156-0x0000000000400000-0x0000000000442000-memory.dmp family_isrstealer -
NirSoft MailPassView 2 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule behavioral2/memory/1464-154-0x0000000000400000-0x000000000041F000-memory.dmp MailPassView behavioral2/memory/1464-155-0x0000000000400000-0x000000000041F000-memory.dmp MailPassView -
Nirsoft 2 IoCs
Processes:
resource yara_rule behavioral2/memory/1464-154-0x0000000000400000-0x000000000041F000-memory.dmp Nirsoft behavioral2/memory/1464-155-0x0000000000400000-0x000000000041F000-memory.dmp Nirsoft -
Processes:
resource yara_rule behavioral2/memory/4424-141-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/4424-143-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/4424-144-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/4424-145-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/4424-146-0x0000000000400000-0x0000000000453000-memory.dmp upx behavioral2/memory/1464-151-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/1464-153-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/1464-154-0x0000000000400000-0x000000000041F000-memory.dmp upx behavioral2/memory/1464-155-0x0000000000400000-0x000000000041F000-memory.dmp upx -
Drops startup file 1 IoCs
Processes:
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\zb72t6bIXt.lnk cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe -
Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
Processes:
Cvtres.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts Cvtres.exe -
Suspicious use of SetThreadContext 3 IoCs
Processes:
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exeCvtres.exedescription pid process target process PID 680 set thread context of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 3440 set thread context of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 set thread context of 1464 3440 Cvtres.exe Cvtres.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Cvtres.exepid process 3440 Cvtres.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exeCvtres.exedescription pid process target process PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 680 wrote to memory of 3440 680 cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 4424 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe PID 3440 wrote to memory of 1464 3440 Cvtres.exe Cvtres.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe"C:\Users\Admin\AppData\Local\Temp\cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe"1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:680 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3440 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe/scomma "C:\Users\Admin\AppData\Local\Temp\TKX0yq9v8q.ini"3⤵PID:4424
-
-
C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe/scomma "C:\Users\Admin\AppData\Local\Temp\PYLAGmazPh.ini"3⤵
- Accesses Microsoft Outlook accounts
PID:1464
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
5B
MD5d1ea279fb5559c020a1b4137dc4de237
SHA1db6f8988af46b56216a6f0daf95ab8c9bdb57400
SHA256fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
SHA512720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3