Analysis
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max time kernel
129s -
max time network
99s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
24-05-2024 22:07
Static task
static1
Behavioral task
behavioral1
Sample
ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe
Resource
win10v2004-20240426-en
General
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Target
ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe
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Size
2.0MB
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MD5
5eb63bfedf53c81afce2b09946ec4494
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SHA1
e0391d72664acaa955cc9b1471f05e7b4c26e47d
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SHA256
ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd
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SHA512
8ff69748f80f110028be5945fc6ec787ea3669f2cf50276d2a76e2cbcb84d481e3aa0e0a1b0f8d98fac9fd5d8899d8608184defe985084cae32407c285e58350
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SSDEEP
49152:s4K3x1vUWJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18WtIuoITsdZ
Malware Config
Extracted
stealc
Extracted
vidar
https://steamcommunity.com/profiles/76561199689717899
https://t.me/copterwin
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
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Detect Vidar Stealer 13 IoCs
Processes:
resource yara_rule behavioral1/memory/764-1-0x0000000004040000-0x0000000004189000-memory.dmp family_vidar_v7 behavioral1/memory/2036-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-8-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-10-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-13-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-14-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-31-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-32-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-48-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-49-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-60-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-61-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2036-62-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
kat3633.tmpdescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation kat3633.tmp -
Executes dropped EXE 1 IoCs
Processes:
kat3633.tmppid process 2036 kat3633.tmp -
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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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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 cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exedescription pid process target process PID 764 set thread context of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
kat3633.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3633.tmp -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1632 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
kat3633.tmppid process 2036 kat3633.tmp 2036 kat3633.tmp 2036 kat3633.tmp 2036 kat3633.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exekat3633.tmpcmd.exedescription pid process target process PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 764 wrote to memory of 2036 764 ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe kat3633.tmp PID 2036 wrote to memory of 4340 2036 kat3633.tmp cmd.exe PID 2036 wrote to memory of 4340 2036 kat3633.tmp cmd.exe PID 2036 wrote to memory of 4340 2036 kat3633.tmp cmd.exe PID 4340 wrote to memory of 1632 4340 cmd.exe timeout.exe PID 4340 wrote to memory of 1632 4340 cmd.exe timeout.exe PID 4340 wrote to memory of 1632 4340 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe"C:\Users\Admin\AppData\Local\Temp\ab8a1c4cd0900427759f61233d6a79abe403a85d6467e2f8f596c1b950b74acd.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat3633.tmpC:\Users\Admin\AppData\Local\Temp\kat3633.tmp2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3633.tmp" & rd /s /q "C:\ProgramData\HJDGCGDBGCAA" & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\kat3633.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/764-9-0x0000000000400000-0x000000000060C000-memory.dmpFilesize
2.0MB
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memory/764-1-0x0000000004040000-0x0000000004189000-memory.dmpFilesize
1.3MB
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memory/764-0-0x00000000007D0000-0x00000000007D1000-memory.dmpFilesize
4KB
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memory/2036-14-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-10-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-8-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-13-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-16-0x000000001DC10000-0x000000001DE6F000-memory.dmpFilesize
2.4MB
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memory/2036-31-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-32-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-48-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-49-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-60-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-61-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2036-62-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB