Analysis
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max time kernel
121s -
max time network
123s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
14-12-2021 13:47
Static task
static1
Behavioral task
behavioral1
Sample
tmp/vbc.exe
Resource
win7-en-20211208
General
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Target
tmp/vbc.exe
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Size
1.4MB
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MD5
3668f9be040098859e662ba94616cc51
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SHA1
3b3ec4ac86c462747a2190c33ca2a4588fcc9310
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SHA256
b190c0b66428b594f7507ae98fcc45e1907cb9cdf618919002791241ae94280f
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SHA512
54fa8de69114af4fc8ccfa5ef11a82587d3b74b5fa80e6e8d1683e5ce997db5d6ffc1b133ebcf97c226c2aad928696198392faaf184486685f0aa2a048a43dd3
Malware Config
Extracted
matiex
https://api.telegram.org/bot1769394961:AAF5BB35akL859CwVaXypIqpVsGWlaKvi7A/sendMessage?chat_id=1735544933
Signatures
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Matiex Main Payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/1224-122-0x0000000000400000-0x0000000000476000-memory.dmp family_matiex behavioral2/memory/1224-123-0x000000000047032E-mapping.dmp family_matiex -
Uses the VBS compiler for execution 1 TTPs
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Suspicious use of SetThreadContext 1 IoCs
Processes:
vbc.exedescription pid process target process PID 3576 set thread context of 1224 3576 vbc.exe vbc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
powershell.exedw20.exepid process 904 powershell.exe 1736 dw20.exe 1736 dw20.exe 904 powershell.exe 904 powershell.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
powershell.exedw20.exedescription pid process Token: SeDebugPrivilege 904 powershell.exe Token: SeRestorePrivilege 1736 dw20.exe Token: SeBackupPrivilege 1736 dw20.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
vbc.exevbc.exedescription pid process target process PID 3576 wrote to memory of 904 3576 vbc.exe powershell.exe PID 3576 wrote to memory of 904 3576 vbc.exe powershell.exe PID 3576 wrote to memory of 904 3576 vbc.exe powershell.exe PID 3576 wrote to memory of 1424 3576 vbc.exe schtasks.exe PID 3576 wrote to memory of 1424 3576 vbc.exe schtasks.exe PID 3576 wrote to memory of 1424 3576 vbc.exe schtasks.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 3576 wrote to memory of 1224 3576 vbc.exe vbc.exe PID 1224 wrote to memory of 1736 1224 vbc.exe dw20.exe PID 1224 wrote to memory of 1736 1224 vbc.exe dw20.exe PID 1224 wrote to memory of 1736 1224 vbc.exe dw20.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SOEtXbQzHDdq.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SOEtXbQzHDdq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4C38.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe"C:\Users\Admin\AppData\Local\Temp\tmp\vbc.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exedw20.exe -x -s 6923⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\vbc.exe.logMD5
8849f2ad959553d9be276cf960a5ca7e
SHA1b1a4be5cfa443ac6d1df4e4c1d9d6980aadab820
SHA256acd871ad3e3199dc52b514078fd2c6ee21d6643616d5c9b4cb55760ce03b443b
SHA512734c2e6526c6d2d8acde6d55bc45fddc1dc1b60adc653828d564d16042cc6939e282aa309d58b3a6f8c30e734b98201cb4a21fe0a3815d6a251093b30ef89115
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C:\Users\Admin\AppData\Local\Temp\tmp4C38.tmpMD5
2cc3e8e523e5a218c87cc390ecf72ae6
SHA16d97c7e11a945669895e7e7d7760a5a1988dc1a2
SHA256c4345a446b8f75233ac91d90a5acea32557a42a91041cf59fc9d099c6de6a995
SHA5127414bc1059cc4ea48d6a29e5b11439bc938b1f3eade65c6d46036b87909d59e21ea6898814a7840f3e2d8af5056371f2d02506bec45a91f7bb0a1bd4adac0ab5
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memory/904-128-0x00000000044B2000-0x00000000044B3000-memory.dmpFilesize
4KB
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memory/904-135-0x0000000007F20000-0x0000000007F21000-memory.dmpFilesize
4KB
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memory/904-159-0x000000007F730000-0x000000007F731000-memory.dmpFilesize
4KB
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memory/904-119-0x00000000044E0000-0x00000000044E1000-memory.dmpFilesize
4KB
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memory/904-120-0x0000000006FF0000-0x0000000006FF1000-memory.dmpFilesize
4KB
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memory/904-158-0x0000000009390000-0x0000000009391000-memory.dmpFilesize
4KB
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memory/904-157-0x00000000091C0000-0x00000000091C1000-memory.dmpFilesize
4KB
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memory/904-152-0x0000000009050000-0x0000000009051000-memory.dmpFilesize
4KB
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memory/904-115-0x0000000000000000-mapping.dmp
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memory/904-130-0x0000000007620000-0x0000000007621000-memory.dmpFilesize
4KB
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memory/904-126-0x0000000006F10000-0x0000000006F11000-memory.dmpFilesize
4KB
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memory/904-127-0x00000000044B0000-0x00000000044B1000-memory.dmpFilesize
4KB
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memory/904-118-0x0000000002BD0000-0x0000000002BD1000-memory.dmpFilesize
4KB
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memory/904-160-0x00000000044B3000-0x00000000044B4000-memory.dmpFilesize
4KB
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memory/904-145-0x0000000009090000-0x00000000090C3000-memory.dmpFilesize
204KB
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memory/904-131-0x0000000007860000-0x0000000007861000-memory.dmpFilesize
4KB
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memory/904-132-0x00000000078D0000-0x00000000078D1000-memory.dmpFilesize
4KB
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memory/904-133-0x00000000076D0000-0x00000000076D1000-memory.dmpFilesize
4KB
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memory/904-134-0x0000000007FB0000-0x0000000007FB1000-memory.dmpFilesize
4KB
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memory/904-117-0x0000000002BD0000-0x0000000002BD1000-memory.dmpFilesize
4KB
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memory/904-136-0x0000000002BD0000-0x0000000002BD1000-memory.dmpFilesize
4KB
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memory/1224-123-0x000000000047032E-mapping.dmp
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memory/1224-122-0x0000000000400000-0x0000000000476000-memory.dmpFilesize
472KB
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memory/1224-129-0x0000000003020000-0x0000000003021000-memory.dmpFilesize
4KB
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memory/1424-116-0x0000000000000000-mapping.dmp
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memory/1736-125-0x0000000000000000-mapping.dmp
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memory/3576-114-0x00000000029A0000-0x00000000029A1000-memory.dmpFilesize
4KB