Analysis
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max time kernel
148s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
21-11-2024 03:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe
Resource
win7-20241023-en
General
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Target
2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe
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Size
1.4MB
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MD5
46e0d77fd57690bbab3c8ded7015a79a
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SHA1
d4b8df6b54c0eb7fdb344d75766a1a71ee74796b
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SHA256
7142feb70d6d709c2c6e1ad58a1c69f5348e30d3e5b7154847a7fa4fcc4aab61
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SHA512
ba0b8607617bfca14641ae5781a6cd161d31f83989a42b903f63db886a341f9cb96a219b790938ad68848e3436d1d3ed558f30ec605135d297417a7c70f0e37e
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SSDEEP
24576:E301J529+RipvL1SXk1QE1RGOTnIEQc4au9NgxnHNn/fI4Ca7:EEI9+ApwXk1QE1RzsEQPaxHNXfZ
Malware Config
Signatures
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Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1" tazebama.dl_ -
Executes dropped EXE 1 IoCs
pid Process 3672 tazebama.dl_ -
Loads dropped DLL 1 IoCs
pid Process 3568 2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe -
Enumerates connected drives 3 TTPs 21 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\W: tazebama.dl_ File opened (read-only) \??\P: tazebama.dl_ File opened (read-only) \??\H: tazebama.dl_ File opened (read-only) \??\O: tazebama.dl_ File opened (read-only) \??\M: tazebama.dl_ File opened (read-only) \??\J: tazebama.dl_ File opened (read-only) \??\G: tazebama.dl_ File opened (read-only) \??\X: tazebama.dl_ File opened (read-only) \??\T: tazebama.dl_ File opened (read-only) \??\R: tazebama.dl_ File opened (read-only) \??\Q: tazebama.dl_ File opened (read-only) \??\Z: tazebama.dl_ File opened (read-only) \??\S: tazebama.dl_ File opened (read-only) \??\N: tazebama.dl_ File opened (read-only) \??\I: tazebama.dl_ File opened (read-only) \??\K: tazebama.dl_ File opened (read-only) \??\E: tazebama.dl_ File opened (read-only) \??\Y: tazebama.dl_ File opened (read-only) \??\V: tazebama.dl_ File opened (read-only) \??\U: tazebama.dl_ File opened (read-only) \??\L: tazebama.dl_ -
Drops autorun.inf file 1 TTPs 3 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File opened for modification F:\autorun.inf tazebama.dl_ File opened for modification C:\autorun.inf tazebama.dl_ File opened for modification C:\Documents and Settings\Admin\Local Settings\Application Data\Microsoft\CD Burning\autorun.inf tazebama.dl_ -
Drops file in Program Files directory 1 IoCs
description ioc Process File opened for modification C:\PROGRAM FILES (X86)\ADOBE\ACROBAT READER DC\READER\ACRORD32.EXE tazebama.dl_ -
Program crash 1 IoCs
pid pid_target Process procid_target 4608 3672 WerFault.exe 82 -
System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language tazebama.dl_ -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3672 tazebama.dl_ 3672 tazebama.dl_ -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3568 wrote to memory of 3672 3568 2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe 82 PID 3568 wrote to memory of 3672 3568 2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe 82 PID 3568 wrote to memory of 3672 3568 2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-11-21_46e0d77fd57690bbab3c8ded7015a79a_bkransomware.exe"1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3568 -
C:\Documents and Settings\tazebama.dl_"C:\Documents and Settings\tazebama.dl_"2⤵
- Modifies visibility of file extensions in Explorer
- Executes dropped EXE
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:3672 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3672 -s 7283⤵
- Program crash
PID:4608
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3672 -ip 36721⤵PID:4516
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
149KB
MD52371fabd6555639e975c8b8a55f35643
SHA1a642897675426cdf7d1f894657c1d4b3fbd08639
SHA256900e6fc908e863f67af32e7d5915f14584ca6c48714a53d7b123ca1a21ee111a
SHA51215c0c24d2e1e79339cbb8b030bcaa16be5c28b0e4f0bd43191f3bbf560defcf5b0d231587e52857b86126bdc5c50877ac2d7d4e2ec7969c520def32b78e58ff8
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Filesize
32KB
MD5b6a03576e595afacb37ada2f1d5a0529
SHA1d598d4d0e70dec2ffa2849edaeb4db94fedcc0b8
SHA2561707eaf60aa91f3791aa5643bfa038e9d8141878d61f5d701ebac51f4ae7aaad
SHA512181b7cc6479352fe2c53c3630d45a839cdeb74708be6709c2a75847a54de3ffc1fdac8450270dde7174ecb23e5cb002f8ce39032429a3112b1202f3381b8918c
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Filesize
126B
MD5163e20cbccefcdd42f46e43a94173c46
SHA14c7b5048e8608e2a75799e00ecf1bbb4773279ae
SHA2567780bee9df142a17e0457f3dcb2788b50fc2792370089335597d33719126fb7e
SHA512e5ac0ff6b087857799ab70f68067c9dc73eeb93ccfcad87047052380b95ade3e6eb2a7d01a0f850d548a39f4b1ebb60e299d603dbe25c31b9a3585b34a0c65a8
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Filesize
149KB
MD5cd69820730671bce9d8451bd54601f63
SHA16b7436c4149d674efca05e9571cd6a2da005d3ba
SHA2563f8517251a12e4205b4648aada05d02268ef521fef0ea62ac289413a2c4480b1
SHA512be7fd3e380d7329db619b6002bb73f0f64979d261614a05baa2d2bae5f589f3beee63c00a57d4538be7e11df84b1f4c1141a01cd24419d15fdac9298f5f89e88
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Filesize
149KB
MD501a559a6aa3edec54d1b7ee51c19bc0a
SHA11c367f67504a55cbb85b0ffed82b5908cfb7633f
SHA2560218fa3183809f5487b7e975b957bf3e57d619a51c4a89e00d57843efd002549
SHA512090ee9b838032fed676c9ed350705a0fdb2e3061ba440f5aac4d5289374050500dbd881edff57c8bea2f717e1f2e2ef5c28273c96747508db760bf60c25164ac