Analysis
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max time kernel
119s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
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submitted
25-04-2024 16:11
General
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Target
Document.doc.scr
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Size
194KB
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MD5
b7b4c97132d03eead1fa9a9352dee6c2
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SHA1
c9eb1bdc528076fa9c91668addf0723294ac1575
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SHA256
1ecea8b0bc92378bf2bdd1c14ae1628c573569419b91cc34504d2c3f8bb9f8b2
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SHA512
cb0023bc6783a94a27d2d4a67c214e8657fd334d1a94a7dba51277363dee2a67e7ecc5fc0788cead1c4e0e2dc7d9aa758203f89dce162184869d20a44d171903
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SSDEEP
3072:v6glyuxE4GsUPnliByocWepXKD0/9Wy1Og/ZK99r:v6gDBGpvEByocWehKD0/EWfg3
Malware Config
Signatures
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Renames multiple (320) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Deletes itself 1 IoCs
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Executes dropped EXE 1 IoCs
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Loads dropped DLL 1 IoCs
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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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Drops desktop.ini file(s) 2 IoCs
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Sets desktop wallpaper using registry 2 TTPs 2 IoCs
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Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies Control Panel 2 IoCs
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Modifies registry class 5 IoCs
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Suspicious behavior: EnumeratesProcesses 14 IoCs
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Suspicious behavior: RenamesItself 26 IoCs
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Suspicious use of AdjustPrivilegeToken 64 IoCs
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Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Document.doc.scr"C:\Users\Admin\AppData\Local\Temp\Document.doc.scr" /S1⤵
- Loads dropped DLL
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\ProgramData\B2CB.tmp"C:\ProgramData\B2CB.tmp"2⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\B2CB.tmp >> NUL3⤵
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x1581⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\$Recycle.Bin\S-1-5-21-330940541-141609230-1670313778-1000\desktop.iniFilesize
129B
MD5ed43b7a546022c4e1ab6db2618ab2d08
SHA15120a5c4b5446992daf75679ad35422547c82267
SHA25661fe0cf02160e03187b52c3cf4f1b395398ab4d56980bced965fb8fea84e3dfa
SHA512e85219c51a06554db04be54f2c0f6815f557fdb96e4c5f9f5d354b8c5d89d461fb37509ef5f4915ace33792038b928303962423e0919a31b6b5c398d7484147e
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C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDFilesize
194KB
MD5ce11ed05c867cbe47cce29b40c0f4183
SHA117150290f3828b9fbca398deb5b3f7944787bcce
SHA256bd661b011c21e7146ef8ff7269874ee0c96c4c8af6d6afa1f970441854659bf9
SHA512b1985369c55d70d1a965ba222ca5056493a08c13375148b9f10bef1e07357260241404d6bc6f034e5306fde7df7b49db3ca21829257f602af35e603f5d15c60c
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C:\te8ZzuVLn.README.txtFilesize
434B
MD5ad29bd8c66e114ff57c943d16c78f72a
SHA15ab070ee89a36f38facae4dfc8ec5ce3e59af46e
SHA2566fe668fe8bf69158d1fd08e90f3cff60c1df410bf752635bf152853b6112549c
SHA512a53121e2379aa9c3bc52d073498a54f26383834f6d6636b4b3831010565c80bf0da07511907eab7bd92f9796e559958b1c0ebea4c4b0f0d869e95b7deb5da7f1
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F:\$RECYCLE.BIN\S-1-5-21-330940541-141609230-1670313778-1000\DDDDDDDDDDDFilesize
129B
MD584de8fe358723317b51d13675b6d9e86
SHA18f7cd7f3073bea7dbf35de18a4848b2a11730fc8
SHA256ddac64f0e5c72add64b25b99af60737c69b88b21ff6e38c4a154744005929b68
SHA5125ed0fa8298d74bda89e9077661f3825ca668f06241d456182d313b047c28aafadacc2c3a8677861d8407fa514e3bc054165dd94461b6170435400f2ea0a709d1
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\ProgramData\B2CB.tmpFilesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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memory/1048-838-0x000000007EFA0000-0x000000007EFA1000-memory.dmpFilesize
4KB
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memory/1048-839-0x0000000002190000-0x00000000021D0000-memory.dmpFilesize
256KB
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memory/1048-843-0x000000007EF80000-0x000000007EF81000-memory.dmpFilesize
4KB
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memory/1048-844-0x000000007EF20000-0x000000007EF21000-memory.dmpFilesize
4KB
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memory/1048-870-0x000000007EF40000-0x000000007EF41000-memory.dmpFilesize
4KB
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memory/1048-871-0x000000007EF60000-0x000000007EF61000-memory.dmpFilesize
4KB
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memory/1300-0-0x0000000000A00000-0x0000000000A40000-memory.dmpFilesize
256KB