Analysis
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max time kernel
107s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
23-05-2022 17:19
Static task
static1
Behavioral task
behavioral1
Sample
01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe
Resource
win7-20220414-en
General
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Target
01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe
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Size
3.6MB
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MD5
697576793e02be59d60a0ba2a59bbc8d
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SHA1
3d8e38dfb94cf336c4a31e03e4ccd8bc4983bae5
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SHA256
01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f
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SHA512
1f065f44a4be0ac4b41efd51e26d19dd56001ad9969d4191ff5f1d70059d77dcd21eb01d09b5bc27461e19545a90c877fce5222fe9aea40c38dc1347aab117ea
Malware Config
Extracted
vidar
9.4
231
http://prohomedevelopers.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 1 IoCs
Processes:
resource yara_rule behavioral2/memory/5060-138-0x0000000000400000-0x00000000009C5000-memory.dmp family_vidar -
Executes dropped EXE 2 IoCs
Processes:
busshost.exeYTLoader.exepid process 5060 busshost.exe 1480 YTLoader.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.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 10 ip-api.com -
Drops file in Program Files directory 4 IoCs
Processes:
01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exedescription ioc process File opened for modification C:\Program Files (x86)\LetsSee!\YTLoader.exe 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe File opened for modification C:\Program Files (x86)\LetsSee!\busshost.exe 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe File opened for modification C:\Program Files (x86)\LetsSee!\Uninstall.exe 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe File created C:\Program Files (x86)\LetsSee!\Uninstall.ini 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.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 1752 1480 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 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 5060 busshost.exe 5060 busshost.exe 5060 busshost.exe 5060 busshost.exe 5060 busshost.exe 5060 busshost.exe 5060 busshost.exe 5060 busshost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
YTLoader.exedescription pid process Token: SeDebugPrivilege 1480 YTLoader.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exedescription pid process target process PID 3112 wrote to memory of 5060 3112 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe busshost.exe PID 3112 wrote to memory of 5060 3112 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe busshost.exe PID 3112 wrote to memory of 5060 3112 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe busshost.exe PID 3112 wrote to memory of 1480 3112 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe YTLoader.exe PID 3112 wrote to memory of 1480 3112 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe YTLoader.exe PID 3112 wrote to memory of 1480 3112 01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe YTLoader.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.exe"C:\Users\Admin\AppData\Local\Temp\01ecb8e12553c49e1e31a7246653b6131289f22f44f0deb7097afb39ff46af9f.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 1480 -s 16083⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1480 -ip 14801⤵
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
927KB
MD541e889d85b10720ae552caae2b62279c
SHA1ca427f8f0bed8fcd608784193ad5304bc0ac8232
SHA2564e6ad1e300803b75a210f20ddf00056932c476e9df8117111ed2ae65a533bb01
SHA5125065def5be672c2884d24e090bc1a0c439ca3708933249cc66e95d08dd8636f1061b7cd845cd824020d6727d730f19f89f4d69d14a7150fcae87f182bb8bc66e
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C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
927KB
MD541e889d85b10720ae552caae2b62279c
SHA1ca427f8f0bed8fcd608784193ad5304bc0ac8232
SHA2564e6ad1e300803b75a210f20ddf00056932c476e9df8117111ed2ae65a533bb01
SHA5125065def5be672c2884d24e090bc1a0c439ca3708933249cc66e95d08dd8636f1061b7cd845cd824020d6727d730f19f89f4d69d14a7150fcae87f182bb8bc66e
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memory/1480-139-0x0000000000FF0000-0x00000000012F8000-memory.dmpFilesize
3.0MB
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memory/1480-134-0x0000000000000000-mapping.dmp
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memory/1480-140-0x0000000005E20000-0x0000000005E2A000-memory.dmpFilesize
40KB
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memory/1480-141-0x0000000005E30000-0x0000000005E38000-memory.dmpFilesize
32KB
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memory/1480-142-0x0000000005E50000-0x0000000005E58000-memory.dmpFilesize
32KB
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memory/1480-143-0x0000000005E60000-0x0000000005E68000-memory.dmpFilesize
32KB
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memory/1480-144-0x0000000006570000-0x0000000006578000-memory.dmpFilesize
32KB
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memory/1480-145-0x0000000006590000-0x0000000006598000-memory.dmpFilesize
32KB
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memory/1480-146-0x00000000065A0000-0x00000000065A8000-memory.dmpFilesize
32KB
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memory/1480-147-0x00000000065B0000-0x00000000065B8000-memory.dmpFilesize
32KB
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memory/5060-137-0x0000000002790000-0x0000000002890000-memory.dmpFilesize
1024KB
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memory/5060-138-0x0000000000400000-0x00000000009C5000-memory.dmpFilesize
5.8MB
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memory/5060-130-0x0000000000000000-mapping.dmp