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 23:38
Static task
static1
Behavioral task
behavioral1
Sample
4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe
Resource
win10v2004-20240426-en
General
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Target
4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe
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Size
2.0MB
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MD5
4d921c1ff121090f53eb61bf9fd8ffa6
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SHA1
13538bda0a3ae68dadd9afed77d4be8de49738bf
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SHA256
4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f
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SHA512
e6dd0d2075156ec9bdb883eb2a5c2bc03c96d3b9e32e3f7cccd745f5ec4f6ed91e45c70c5ac07947c824c0d02152c8b9dec716ba4ef81d72fa9b5890aa9a59a0
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SSDEEP
49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ
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 14 IoCs
Processes:
resource yara_rule behavioral1/memory/712-2-0x0000000004130000-0x0000000004279000-memory.dmp family_vidar_v7 behavioral1/memory/2712-9-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-4-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-10-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-14-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-15-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-32-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-33-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-49-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-50-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-61-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-62-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-63-0x0000000000400000-0x0000000000646000-memory.dmp family_vidar_v7 behavioral1/memory/2712-64-0x0000000000400000-0x0000000000646000-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:
kat31FD.tmpdescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation kat31FD.tmp -
Executes dropped EXE 1 IoCs
Processes:
kat31FD.tmppid process 2712 kat31FD.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:
4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exedescription pid process target process PID 712 set thread context of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.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:
kat31FD.tmpdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat31FD.tmp -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 5204 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
kat31FD.tmppid process 2712 kat31FD.tmp 2712 kat31FD.tmp 2712 kat31FD.tmp 2712 kat31FD.tmp -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exekat31FD.tmpcmd.exedescription pid process target process PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 712 wrote to memory of 2712 712 4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe kat31FD.tmp PID 2712 wrote to memory of 2596 2712 kat31FD.tmp cmd.exe PID 2712 wrote to memory of 2596 2712 kat31FD.tmp cmd.exe PID 2712 wrote to memory of 2596 2712 kat31FD.tmp cmd.exe PID 2596 wrote to memory of 5204 2596 cmd.exe timeout.exe PID 2596 wrote to memory of 5204 2596 cmd.exe timeout.exe PID 2596 wrote to memory of 5204 2596 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe"C:\Users\Admin\AppData\Local\Temp\4b2fce741726ff589c74a27eb4c0d3ca63f130c9083b77160e41e6d6444c758f.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat31FD.tmpC:\Users\Admin\AppData\Local\Temp\kat31FD.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\kat31FD.tmp" & rd /s /q "C:\ProgramData\BFCGDAAKFHID" & 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
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\kat31FD.tmpFilesize
861KB
MD566064dbdb70a5eb15ebf3bf65aba254b
SHA10284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA2566a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
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memory/712-0-0x00000000007E0000-0x00000000007E1000-memory.dmpFilesize
4KB
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memory/712-2-0x0000000004130000-0x0000000004279000-memory.dmpFilesize
1.3MB
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memory/712-6-0x0000000000400000-0x000000000060C000-memory.dmpFilesize
2.0MB
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memory/2712-15-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-33-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-10-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-14-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-9-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-17-0x000000001DBB0000-0x000000001DE0F000-memory.dmpFilesize
2.4MB
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memory/2712-32-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-4-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-49-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-50-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-61-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-62-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-63-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB
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memory/2712-64-0x0000000000400000-0x0000000000646000-memory.dmpFilesize
2.3MB