Analysis
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max time kernel
137s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
07-07-2022 07:57
Static task
static1
Behavioral task
behavioral1
Sample
46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe
Resource
win7-20220414-en
General
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Target
46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe
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Size
3.6MB
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MD5
f7d53aa01488466bb5a5d5960e6ab07a
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SHA1
1ab04033bc587424042d5fd2d9eb676c198c8063
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SHA256
46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb
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SHA512
85bc152116cec842958ff8c611840c6280a7db182f96f7c17e28cc4cce4cb08dbc8d59a8ffac67bbe6b6e8626ff887ce9ee8324498d030796f0c540e215ff096
Malware Config
Extracted
vidar
9.4
231
http://prohomedevelopers.com/
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profile_id
231
Signatures
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Vidar Stealer 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4164-139-0x0000000000400000-0x00000000008AD000-memory.dmp family_vidar behavioral2/memory/4164-149-0x0000000000400000-0x00000000008AD000-memory.dmp family_vidar -
Executes dropped EXE 2 IoCs
Processes:
busshost.exeYTLoader.exepid process 4164 busshost.exe 4244 YTLoader.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.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 4 ip-api.com -
Drops file in Program Files directory 4 IoCs
Processes:
46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exedescription ioc process File opened for modification C:\Program Files (x86)\LetsSee!\YTLoader.exe 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe File opened for modification C:\Program Files (x86)\LetsSee!\busshost.exe 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe File opened for modification C:\Program Files (x86)\LetsSee!\Uninstall.exe 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe File created C:\Program Files (x86)\LetsSee!\Uninstall.ini 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.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 4628 4244 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 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 Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 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 4164 busshost.exe 4164 busshost.exe 4164 busshost.exe 4164 busshost.exe 4164 busshost.exe 4164 busshost.exe 4164 busshost.exe 4164 busshost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
YTLoader.exedescription pid process Token: SeDebugPrivilege 4244 YTLoader.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exedescription pid process target process PID 2692 wrote to memory of 4164 2692 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe busshost.exe PID 2692 wrote to memory of 4164 2692 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe busshost.exe PID 2692 wrote to memory of 4164 2692 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe busshost.exe PID 2692 wrote to memory of 4244 2692 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe YTLoader.exe PID 2692 wrote to memory of 4244 2692 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe YTLoader.exe PID 2692 wrote to memory of 4244 2692 46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe YTLoader.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.exe"C:\Users\Admin\AppData\Local\Temp\46b44a3fc11e29a99e9c7390394f0cf8338fe4d76ade1fb91c37da3033deecdb.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 4244 -s 16083⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4244 -ip 42441⤵
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
636KB
MD526f1f198341637095a4bd461f511e7f8
SHA1056d8c30c092cfa36f135d26128a2120aa34f393
SHA256766333cc2c9e4e4f0430395c1a9f9eacc131dfa19c7cf55df6c44a19d8375ce8
SHA512c87a2bfd3997089bcf3ff0dc679fa07d7d67c3dbaa65d2ffb01f5ad16a558de4271c60b0eff31ff01081ea1d9e811ee2fc4711dfec6f550b03638e5fe5ee22ca
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C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
636KB
MD526f1f198341637095a4bd461f511e7f8
SHA1056d8c30c092cfa36f135d26128a2120aa34f393
SHA256766333cc2c9e4e4f0430395c1a9f9eacc131dfa19c7cf55df6c44a19d8375ce8
SHA512c87a2bfd3997089bcf3ff0dc679fa07d7d67c3dbaa65d2ffb01f5ad16a558de4271c60b0eff31ff01081ea1d9e811ee2fc4711dfec6f550b03638e5fe5ee22ca
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memory/4164-148-0x00000000024D0000-0x00000000025D0000-memory.dmpFilesize
1024KB
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memory/4164-130-0x0000000000000000-mapping.dmp
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memory/4164-149-0x0000000000400000-0x00000000008AD000-memory.dmpFilesize
4.7MB
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memory/4164-138-0x00000000024D0000-0x00000000025D0000-memory.dmpFilesize
1024KB
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memory/4164-139-0x0000000000400000-0x00000000008AD000-memory.dmpFilesize
4.7MB
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memory/4244-133-0x0000000000000000-mapping.dmp
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memory/4244-141-0x0000000005740000-0x0000000005748000-memory.dmpFilesize
32KB
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memory/4244-142-0x0000000005760000-0x0000000005768000-memory.dmpFilesize
32KB
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memory/4244-143-0x0000000005770000-0x0000000005778000-memory.dmpFilesize
32KB
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memory/4244-144-0x0000000005F80000-0x0000000005F88000-memory.dmpFilesize
32KB
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memory/4244-145-0x0000000005FA0000-0x0000000005FA8000-memory.dmpFilesize
32KB
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memory/4244-146-0x0000000005FB0000-0x0000000005FB8000-memory.dmpFilesize
32KB
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memory/4244-147-0x0000000005FC0000-0x0000000005FC8000-memory.dmpFilesize
32KB
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memory/4244-140-0x0000000005730000-0x000000000573A000-memory.dmpFilesize
40KB
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memory/4244-137-0x0000000000A10000-0x0000000000D18000-memory.dmpFilesize
3.0MB