Analysis
-
max time kernel
153s -
max time network
164s -
platform
windows10-2004_x64 -
resource
win10v2004-20220722-en -
resource tags
arch:x64arch:x86image:win10v2004-20220722-enlocale:en-usos:windows10-2004-x64system -
submitted
01-08-2022 15:54
Static task
static1
Behavioral task
behavioral1
Sample
5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe
Resource
win7-20220715-en
General
-
Target
5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe
-
Size
3.6MB
-
MD5
1700357d6d5e4bf495c60f9230bbdebe
-
SHA1
12b59646e8326b5b0409dc3633e3f443449bcc40
-
SHA256
5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25
-
SHA512
2c688c9e6f4d4f88252a6afbd26a907dd31ac52ebc474f73c1b27b72e7bef5a02c5f8bd6a4e6605d8d89714a356efc2814882c930ba400132c321ee4cacbe023
Malware Config
Extracted
vidar
9.2
231
http://wasabinails.com/
-
profile_id
231
Signatures
-
Vidar Stealer 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4272-140-0x0000000000400000-0x000000000051D000-memory.dmp family_vidar behavioral2/memory/4272-142-0x0000000000400000-0x000000000051D000-memory.dmp family_vidar -
Executes dropped EXE 2 IoCs
Processes:
busshost.exeYTLoader.exepid process 4272 busshost.exe 5076 YTLoader.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\Control Panel\International\Geo\Nation 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.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.
-
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
-
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
-
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 34 ip-api.com -
Drops file in Program Files directory 4 IoCs
Processes:
5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exedescription ioc process File opened for modification C:\Program Files (x86)\LetsSee!\busshost.exe 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe File opened for modification C:\Program Files (x86)\LetsSee!\Uninstall.exe 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe File created C:\Program Files (x86)\LetsSee!\Uninstall.ini 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe File opened for modification C:\Program Files (x86)\LetsSee!\YTLoader.exe 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
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 4272 busshost.exe 4272 busshost.exe 4272 busshost.exe 4272 busshost.exe 4272 busshost.exe 4272 busshost.exe 4272 busshost.exe 4272 busshost.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
YTLoader.exedescription pid process Token: SeDebugPrivilege 5076 YTLoader.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exedescription pid process target process PID 4720 wrote to memory of 4272 4720 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe busshost.exe PID 4720 wrote to memory of 4272 4720 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe busshost.exe PID 4720 wrote to memory of 4272 4720 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe busshost.exe PID 4720 wrote to memory of 5076 4720 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe YTLoader.exe PID 4720 wrote to memory of 5076 4720 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe YTLoader.exe PID 4720 wrote to memory of 5076 4720 5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe YTLoader.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe"C:\Users\Admin\AppData\Local\Temp\5c05f9a8dbb32441234866476da8c8bc1ec1622d86037cc2171e742e38ea6b25.exe"1⤵
- Checks computer location settings
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
-
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
-
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
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 5076 -ip 50761⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Program Files (x86)\LetsSee!\YTLoader.exeFilesize
3.0MB
MD5adc9db2753fa3daa6a8156254ba2a5f1
SHA150ff27e2e1c4acc35768b93b73c03f7630027f04
SHA256f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde
SHA5125f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195
-
C:\Program Files (x86)\LetsSee!\YTLoader.exeFilesize
3.0MB
MD5adc9db2753fa3daa6a8156254ba2a5f1
SHA150ff27e2e1c4acc35768b93b73c03f7630027f04
SHA256f8cc40321301d39f03eaa48d42cbbb2e953b694dc13ccf9d986032c621223fde
SHA5125f7fca8da622035f3a83e562d727ccdd842d623ec376f93c75c3218bddd970c34a9efc66a33cfd6e52a398fa2ed090b890d05aecef53f65a22917d50d31a1195
-
C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
546KB
MD59bcd564314e5c4899e84770506ea65af
SHA1c8491ee3bb92442c688ca0ba10bdfde04d92078f
SHA256ace22cfa35bd571c114f026136b07dabe10b565682acb292b769525d9e155119
SHA512872c67b0f97df58ab3341652b8758f4e70aceb402a34b79d943f7bfe528d67541a5f963132782162b197ea04a8ec37f9573300bf33d2823e63bcbd20481404f3
-
C:\Program Files (x86)\LetsSee!\busshost.exeFilesize
546KB
MD59bcd564314e5c4899e84770506ea65af
SHA1c8491ee3bb92442c688ca0ba10bdfde04d92078f
SHA256ace22cfa35bd571c114f026136b07dabe10b565682acb292b769525d9e155119
SHA512872c67b0f97df58ab3341652b8758f4e70aceb402a34b79d943f7bfe528d67541a5f963132782162b197ea04a8ec37f9573300bf33d2823e63bcbd20481404f3
-
memory/4272-141-0x00000000021B0000-0x00000000022B0000-memory.dmpFilesize
1024KB
-
memory/4272-142-0x0000000000400000-0x000000000051D000-memory.dmpFilesize
1.1MB
-
memory/4272-138-0x00000000021B0000-0x00000000022B0000-memory.dmpFilesize
1024KB
-
memory/4272-140-0x0000000000400000-0x000000000051D000-memory.dmpFilesize
1.1MB
-
memory/4272-132-0x0000000000000000-mapping.dmp
-
memory/5076-144-0x0000000005FD0000-0x0000000005FDA000-memory.dmpFilesize
40KB
-
memory/5076-143-0x0000000000F20000-0x0000000001228000-memory.dmpFilesize
3.0MB
-
memory/5076-135-0x0000000000000000-mapping.dmp
-
memory/5076-145-0x0000000005FE0000-0x0000000005FE8000-memory.dmpFilesize
32KB
-
memory/5076-146-0x0000000006700000-0x0000000006708000-memory.dmpFilesize
32KB
-
memory/5076-147-0x0000000006710000-0x0000000006718000-memory.dmpFilesize
32KB
-
memory/5076-148-0x0000000006720000-0x0000000006728000-memory.dmpFilesize
32KB
-
memory/5076-149-0x0000000006740000-0x0000000006748000-memory.dmpFilesize
32KB
-
memory/5076-150-0x0000000006750000-0x0000000006758000-memory.dmpFilesize
32KB
-
memory/5076-151-0x0000000006760000-0x0000000006768000-memory.dmpFilesize
32KB