Analysis
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max time kernel
111s -
max time network
168s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
04-06-2022 11:34
Static task
static1
Behavioral task
behavioral1
Sample
10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe
Resource
win7-20220414-en
General
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Target
10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe
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Size
3.6MB
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MD5
7b04333353705133d4cf78e7cb6f7347
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SHA1
fa968b8e8c0f76981cce33978d95d0281a1f686c
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SHA256
10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992
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SHA512
94ed5319882a2cef847d1671ab95366c69bcd9752cd0c8c305d003edeb31d24fcacf81b7dd735594a85ecc76a4396b0a688485243066ee4c2dcecb25e21cc2c6
Malware Config
Extracted
vidar
9.6
231
http://iloveshaus.com/
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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/1996-139-0x0000000000400000-0x00000000004F1000-memory.dmp family_vidar behavioral2/memory/1996-141-0x0000000000400000-0x00000000004F1000-memory.dmp family_vidar -
Executes dropped EXE 2 IoCs
Processes:
busshost.exeYTLoader.exepid process 1996 busshost.exe 924 YTLoader.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.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 5 ip-api.com -
Drops file in Program Files directory 4 IoCs
Processes:
10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exedescription ioc process File opened for modification C:\Program Files (x86)\LetsSee!\YTLoader.exe 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe File opened for modification C:\Program Files (x86)\LetsSee!\busshost.exe 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe File opened for modification C:\Program Files (x86)\LetsSee!\Uninstall.exe 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe File created C:\Program Files (x86)\LetsSee!\Uninstall.ini 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.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 2 IoCs
Processes:
WerFault.exeWerFault.exepid pid_target process target process 2564 924 WerFault.exe YTLoader.exe 4480 924 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 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 Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 YTLoader.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 1996 busshost.exe 1996 busshost.exe 1996 busshost.exe 1996 busshost.exe 1996 busshost.exe 1996 busshost.exe 1996 busshost.exe 1996 busshost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
YTLoader.exedescription pid process Token: SeDebugPrivilege 924 YTLoader.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exeYTLoader.exedescription pid process target process PID 3288 wrote to memory of 1996 3288 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe busshost.exe PID 3288 wrote to memory of 1996 3288 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe busshost.exe PID 3288 wrote to memory of 1996 3288 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe busshost.exe PID 3288 wrote to memory of 924 3288 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe YTLoader.exe PID 3288 wrote to memory of 924 3288 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe YTLoader.exe PID 3288 wrote to memory of 924 3288 10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe YTLoader.exe PID 924 wrote to memory of 2564 924 YTLoader.exe WerFault.exe PID 924 wrote to memory of 2564 924 YTLoader.exe WerFault.exe PID 924 wrote to memory of 2564 924 YTLoader.exe WerFault.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.exe"C:\Users\Admin\AppData\Local\Temp\10aecf91392e334461f9b6006cb61b2d6c031af8070875c5b0035ec542ee9992.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
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 924 -s 16083⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 924 -s 16083⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 924 -ip 9241⤵
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
653KB
MD5ad081cb73d1b3f921f4c23c1ae07ffcd
SHA194557b405649636d03bf9b97f212625409f34d38
SHA256f13350c737ddec15aa2c3042f86588fb07b1bb023e89a0952dd84f6724793204
SHA5122be4218183af5a338bd51f7d9796fffd8d29a8abae8ffcc1068bfdbd7135e4ac4048f745a2acb2f3588f942ab82e7e10704bcb146cbc6d56d67156c3d66416ee
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C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
653KB
MD5ad081cb73d1b3f921f4c23c1ae07ffcd
SHA194557b405649636d03bf9b97f212625409f34d38
SHA256f13350c737ddec15aa2c3042f86588fb07b1bb023e89a0952dd84f6724793204
SHA5122be4218183af5a338bd51f7d9796fffd8d29a8abae8ffcc1068bfdbd7135e4ac4048f745a2acb2f3588f942ab82e7e10704bcb146cbc6d56d67156c3d66416ee
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memory/924-146-0x0000000005500000-0x0000000005508000-memory.dmpFilesize
32KB
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memory/924-145-0x00000000054F0000-0x00000000054F8000-memory.dmpFilesize
32KB
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memory/924-149-0x0000000005C40000-0x0000000005C48000-memory.dmpFilesize
32KB
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memory/924-138-0x00000000007C0000-0x0000000000AC8000-memory.dmpFilesize
3.0MB
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memory/924-148-0x0000000005C30000-0x0000000005C38000-memory.dmpFilesize
32KB
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memory/924-147-0x0000000005C20000-0x0000000005C28000-memory.dmpFilesize
32KB
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memory/924-133-0x0000000000000000-mapping.dmp
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memory/924-142-0x00000000054B0000-0x00000000054BA000-memory.dmpFilesize
40KB
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memory/924-143-0x00000000054C0000-0x00000000054C8000-memory.dmpFilesize
32KB
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memory/924-144-0x00000000054E0000-0x00000000054E8000-memory.dmpFilesize
32KB
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memory/1996-141-0x0000000000400000-0x00000000004F1000-memory.dmpFilesize
964KB
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memory/1996-130-0x0000000000000000-mapping.dmp
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memory/1996-140-0x0000000002210000-0x0000000002310000-memory.dmpFilesize
1024KB
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memory/1996-139-0x0000000000400000-0x00000000004F1000-memory.dmpFilesize
964KB
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memory/1996-137-0x0000000002210000-0x0000000002310000-memory.dmpFilesize
1024KB
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memory/2564-150-0x0000000000000000-mapping.dmp