Analysis
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max time kernel
132s -
max time network
167s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
27-05-2022 17:53
Static task
static1
Behavioral task
behavioral1
Sample
05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe
Resource
win7-20220414-en
General
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Target
05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe
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Size
3.6MB
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MD5
357fe7f6d6c38b0bf9c90d8a730f221b
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SHA1
2c79680a3566fcede241fecd6e4a58e904b37bbe
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SHA256
05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811
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SHA512
5163875ffa53329f4d8c8d66db0d57a9c8e48949c015b30b25c832b3c755ac5b5dfb114f5fe2c058c90e97c389d4d4efc49cfef2e7d1803522d7db22c61b6b3b
Malware Config
Extracted
vidar
10.7
231
http://mooreny.top/
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profile_id
231
Signatures
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suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
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Vidar Stealer 2 IoCs
Processes:
resource yara_rule behavioral2/memory/3680-147-0x0000000000400000-0x0000000005315000-memory.dmp family_vidar behavioral2/memory/3680-149-0x0000000000400000-0x0000000005315000-memory.dmp family_vidar -
Executes dropped EXE 2 IoCs
Processes:
busshost.exeYTLoader.exepid process 3680 busshost.exe 712 YTLoader.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.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 22 ip-api.com -
Drops file in Program Files directory 4 IoCs
Processes:
05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exedescription ioc process File opened for modification C:\Program Files (x86)\LetsSee!\YTLoader.exe 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe File opened for modification C:\Program Files (x86)\LetsSee!\busshost.exe 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe File opened for modification C:\Program Files (x86)\LetsSee!\Uninstall.exe 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe File created C:\Program Files (x86)\LetsSee!\Uninstall.ini 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.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 4276 712 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:
busshost.exeYTLoader.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString busshost.exe 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 -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
YTLoader.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS YTLoader.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer YTLoader.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName YTLoader.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
busshost.exepid process 3680 busshost.exe 3680 busshost.exe 3680 busshost.exe 3680 busshost.exe 3680 busshost.exe 3680 busshost.exe 3680 busshost.exe 3680 busshost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
YTLoader.exedescription pid process Token: SeDebugPrivilege 712 YTLoader.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exedescription pid process target process PID 4180 wrote to memory of 3680 4180 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe busshost.exe PID 4180 wrote to memory of 3680 4180 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe busshost.exe PID 4180 wrote to memory of 3680 4180 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe busshost.exe PID 4180 wrote to memory of 712 4180 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe YTLoader.exe PID 4180 wrote to memory of 712 4180 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe YTLoader.exe PID 4180 wrote to memory of 712 4180 05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe YTLoader.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.exe"C:\Users\Admin\AppData\Local\Temp\05724070d8c8d387b97c44e6fd9452f429d5babf13d3cb7e7affad9d995fc811.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 712 -s 16163⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 712 -ip 7121⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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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
722KB
MD58b2c74eea09e86e10f20ad950f8086fc
SHA13d2e04064873f89b684024791ae11f574c2041af
SHA25628930a52308cf8162ea2f2966f4d275fac2e8be9c67d0839451d5d35e6fc77e8
SHA51232a0fe2bc588fed4b29724a389f0675efd3cf9bb84819064243a450b67600421c497ee36e61c35ecfe1a6ae7298c63aabe76a6a896f13f2d3ae88236299f5bc9
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C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
722KB
MD58b2c74eea09e86e10f20ad950f8086fc
SHA13d2e04064873f89b684024791ae11f574c2041af
SHA25628930a52308cf8162ea2f2966f4d275fac2e8be9c67d0839451d5d35e6fc77e8
SHA51232a0fe2bc588fed4b29724a389f0675efd3cf9bb84819064243a450b67600421c497ee36e61c35ecfe1a6ae7298c63aabe76a6a896f13f2d3ae88236299f5bc9
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memory/712-138-0x0000000005820000-0x0000000005828000-memory.dmpFilesize
32KB
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memory/712-144-0x00000000059B0000-0x00000000059B8000-memory.dmpFilesize
32KB
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memory/712-136-0x0000000000C40000-0x0000000000F48000-memory.dmpFilesize
3.0MB
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memory/712-137-0x0000000005810000-0x000000000581A000-memory.dmpFilesize
40KB
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memory/712-133-0x0000000000000000-mapping.dmp
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memory/712-139-0x0000000005950000-0x0000000005958000-memory.dmpFilesize
32KB
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memory/712-140-0x0000000005960000-0x0000000005968000-memory.dmpFilesize
32KB
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memory/712-141-0x0000000005970000-0x0000000005978000-memory.dmpFilesize
32KB
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memory/712-142-0x0000000005990000-0x0000000005998000-memory.dmpFilesize
32KB
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memory/712-143-0x00000000059A0000-0x00000000059A8000-memory.dmpFilesize
32KB
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memory/3680-130-0x0000000000000000-mapping.dmp
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memory/3680-146-0x0000000005870000-0x0000000005970000-memory.dmpFilesize
1024KB
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memory/3680-147-0x0000000000400000-0x0000000005315000-memory.dmpFilesize
79.1MB
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memory/3680-148-0x0000000005870000-0x0000000005970000-memory.dmpFilesize
1024KB
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memory/3680-149-0x0000000000400000-0x0000000005315000-memory.dmpFilesize
79.1MB