Analysis
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max time kernel
149s -
max time network
175s -
platform
windows10-2004_x64 -
resource
win10v2004-20220721-en -
resource tags
arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system -
submitted
24-07-2022 05:11
Static task
static1
Behavioral task
behavioral1
Sample
59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe
Resource
win7-20220718-en
General
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Target
59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe
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Size
3.6MB
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MD5
852f308c246c8ee3149ec7414c6fea7f
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SHA1
49cef2f0d76a122d464324b4b73bf255212548d7
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SHA256
59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8
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SHA512
3dcef726e29576602f755ba7b98caea9c2f03f5b801d1bb0177d4d412eab8cc6958ec55d7ce8083f8c7f6fc2edc2028c5d0615c48ac90e89ac71f858de5c88b8
Malware Config
Extracted
vidar
9.5
231
http://bestpolandhotels.com/
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profile_id
231
Signatures
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Vidar Stealer 2 IoCs
Processes:
resource yara_rule behavioral2/memory/2156-139-0x0000000000400000-0x00000000008B1000-memory.dmp family_vidar behavioral2/memory/2156-149-0x0000000000400000-0x00000000008B1000-memory.dmp family_vidar -
Executes dropped EXE 2 IoCs
Processes:
busshost.exeYTLoader.exepid process 2156 busshost.exe 400 YTLoader.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe -
Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
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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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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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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 15 ip-api.com -
Drops file in Program Files directory 4 IoCs
Processes:
59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exedescription ioc process File opened for modification C:\Program Files (x86)\LetsSee!\YTLoader.exe 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe File opened for modification C:\Program Files (x86)\LetsSee!\busshost.exe 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe File opened for modification C:\Program Files (x86)\LetsSee!\Uninstall.exe 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe File created C:\Program Files (x86)\LetsSee!\Uninstall.ini 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 1556 400 WerFault.exe YTLoader.exe -
Checks processor information in registry 2 TTPs 4 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
YTLoader.exebusshost.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 YTLoader.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString YTLoader.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 busshost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString busshost.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
YTLoader.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName YTLoader.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS YTLoader.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer YTLoader.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
busshost.exepid process 2156 busshost.exe 2156 busshost.exe 2156 busshost.exe 2156 busshost.exe 2156 busshost.exe 2156 busshost.exe 2156 busshost.exe 2156 busshost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
YTLoader.exedescription pid process Token: SeDebugPrivilege 400 YTLoader.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exedescription pid process target process PID 4628 wrote to memory of 2156 4628 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe busshost.exe PID 4628 wrote to memory of 2156 4628 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe busshost.exe PID 4628 wrote to memory of 2156 4628 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe busshost.exe PID 4628 wrote to memory of 400 4628 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe YTLoader.exe PID 4628 wrote to memory of 400 4628 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe YTLoader.exe PID 4628 wrote to memory of 400 4628 59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe YTLoader.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe"C:\Users\Admin\AppData\Local\Temp\59274c6c2cddb575e155880d50990fb75a66204af22a24e6f798febb30c409c8.exe"1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\LetsSee!\busshost.exe"C:\Program Files (x86)\LetsSee!\busshost.exe"2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
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C:\Program Files (x86)\LetsSee!\YTLoader.exe"C:\Program Files (x86)\LetsSee!\YTLoader.exe"2⤵
- Executes dropped EXE
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 16083⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 400 -ip 4001⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Program Files (x86)\LetsSee!\YTLoader.exeFilesize
3.0MB
MD5adc9db2753fa3daa6a8156254ba2a5f1
SHA150ff27e2e1c4acc35768b93b73c03f7630027f04
SHA256f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde
SHA5125f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195
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C:\Program Files (x86)\LetsSee!\YTLoader.exeFilesize
3.0MB
MD5adc9db2753fa3daa6a8156254ba2a5f1
SHA150ff27e2e1c4acc35768b93b73c03f7630027f04
SHA256f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde
SHA5125f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195
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C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
647KB
MD5d8f872b975a781c179e616844b8fcda6
SHA1c90a9d46dbb216cacb3c6de9f884a1707dd16ff3
SHA256f3005949682460d4095237758b8756bb323131bc49df4a9e1230201cf1894be1
SHA5129a71f22b785ccdabefcb18127a543108fdb223e9c3837d68be9816c6d6ab03019f4d126695950bf7e65bf041c2f499918873a01b28da6a5f866b07e90773cbaf
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C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
647KB
MD5d8f872b975a781c179e616844b8fcda6
SHA1c90a9d46dbb216cacb3c6de9f884a1707dd16ff3
SHA256f3005949682460d4095237758b8756bb323131bc49df4a9e1230201cf1894be1
SHA5129a71f22b785ccdabefcb18127a543108fdb223e9c3837d68be9816c6d6ab03019f4d126695950bf7e65bf041c2f499918873a01b28da6a5f866b07e90773cbaf
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memory/400-142-0x0000000005300000-0x0000000005308000-memory.dmpFilesize
32KB
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memory/400-145-0x0000000005A40000-0x0000000005A48000-memory.dmpFilesize
32KB
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memory/400-137-0x00000000004A0000-0x00000000007A8000-memory.dmpFilesize
3.0MB
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memory/400-147-0x0000000005A60000-0x0000000005A68000-memory.dmpFilesize
32KB
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memory/400-146-0x0000000005A50000-0x0000000005A58000-memory.dmpFilesize
32KB
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memory/400-140-0x00000000052D0000-0x00000000052DA000-memory.dmpFilesize
40KB
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memory/400-141-0x00000000052E0000-0x00000000052E8000-memory.dmpFilesize
32KB
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memory/400-143-0x0000000005310000-0x0000000005318000-memory.dmpFilesize
32KB
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memory/400-133-0x0000000000000000-mapping.dmp
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memory/400-144-0x0000000005320000-0x0000000005328000-memory.dmpFilesize
32KB
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memory/2156-130-0x0000000000000000-mapping.dmp
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memory/2156-139-0x0000000000400000-0x00000000008B1000-memory.dmpFilesize
4.7MB
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memory/2156-138-0x0000000000B00000-0x0000000000C00000-memory.dmpFilesize
1024KB
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memory/2156-148-0x0000000000B00000-0x0000000000C00000-memory.dmpFilesize
1024KB
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memory/2156-149-0x0000000000400000-0x00000000008B1000-memory.dmpFilesize
4.7MB