Analysis
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max time kernel
119s -
max time network
121s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
15-12-2021 09:58
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/2084-119-0x0000000000400000-0x0000000000476000-memory.dmp family_matiex behavioral2/memory/2084-120-0x000000000047032E-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 3208 set thread context of 2084 3208 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 7 IoCs
Processes:
vbc.exedw20.exepowershell.exepid process 3208 vbc.exe 3208 vbc.exe 2392 dw20.exe 2392 dw20.exe 380 powershell.exe 380 powershell.exe 380 powershell.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
vbc.exedw20.exepowershell.exedescription pid process Token: SeDebugPrivilege 3208 vbc.exe Token: SeRestorePrivilege 2392 dw20.exe Token: SeBackupPrivilege 2392 dw20.exe Token: SeDebugPrivilege 380 powershell.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
vbc.exevbc.exedescription pid process target process PID 3208 wrote to memory of 380 3208 vbc.exe powershell.exe PID 3208 wrote to memory of 380 3208 vbc.exe powershell.exe PID 3208 wrote to memory of 380 3208 vbc.exe powershell.exe PID 3208 wrote to memory of 2020 3208 vbc.exe schtasks.exe PID 3208 wrote to memory of 2020 3208 vbc.exe schtasks.exe PID 3208 wrote to memory of 2020 3208 vbc.exe schtasks.exe PID 3208 wrote to memory of 1648 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 1648 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 1648 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 3208 wrote to memory of 2084 3208 vbc.exe vbc.exe PID 2084 wrote to memory of 2392 2084 vbc.exe dw20.exe PID 2084 wrote to memory of 2392 2084 vbc.exe dw20.exe PID 2084 wrote to memory of 2392 2084 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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- 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\tmpD628.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⤵
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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 6883⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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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\tmpD628.tmpMD5
04e8da8ab6c0d225ca3b47447483b467
SHA133a95abb6ee837f2ecb708ab0a776109f72d4ef2
SHA2569b82a8a9178b577ef2e1e6309807fab4607b84c9434309bd7bad5e53ae105ff8
SHA512d0780a051ff1f8f746e85d7936b6441326624ac3bcc201f02f5f29e65ac1df88d800ea125446c68ae304a41ebfc0a134328930ae5da5b9f05984cb47b92328b7
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memory/380-128-0x0000000007080000-0x0000000007081000-memory.dmpFilesize
4KB
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memory/380-136-0x0000000008590000-0x0000000008591000-memory.dmpFilesize
4KB
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memory/380-130-0x0000000007500000-0x0000000007501000-memory.dmpFilesize
4KB
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memory/380-160-0x00000000099C0000-0x00000000099C1000-memory.dmpFilesize
4KB
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memory/380-116-0x0000000000000000-mapping.dmp
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memory/380-122-0x0000000003140000-0x0000000003141000-memory.dmpFilesize
4KB
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memory/380-123-0x0000000003140000-0x0000000003141000-memory.dmpFilesize
4KB
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memory/380-159-0x000000007F010000-0x000000007F011000-memory.dmpFilesize
4KB
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memory/380-158-0x00000000095A0000-0x00000000095A1000-memory.dmpFilesize
4KB
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memory/380-126-0x0000000004AD0000-0x0000000004AD1000-memory.dmpFilesize
4KB
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memory/380-127-0x00000000076C0000-0x00000000076C1000-memory.dmpFilesize
4KB
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memory/380-129-0x0000000007082000-0x0000000007083000-memory.dmpFilesize
4KB
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memory/380-153-0x0000000009440000-0x0000000009441000-memory.dmpFilesize
4KB
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memory/380-223-0x0000000007083000-0x0000000007084000-memory.dmpFilesize
4KB
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memory/380-146-0x0000000009460000-0x0000000009493000-memory.dmpFilesize
204KB
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memory/380-132-0x0000000007610000-0x0000000007611000-memory.dmpFilesize
4KB
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memory/380-133-0x0000000007DF0000-0x0000000007DF1000-memory.dmpFilesize
4KB
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memory/380-134-0x0000000008190000-0x0000000008191000-memory.dmpFilesize
4KB
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memory/380-135-0x0000000008620000-0x0000000008621000-memory.dmpFilesize
4KB
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memory/380-131-0x00000000075A0000-0x00000000075A1000-memory.dmpFilesize
4KB
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memory/380-137-0x0000000003140000-0x0000000003141000-memory.dmpFilesize
4KB
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memory/2020-117-0x0000000000000000-mapping.dmp
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memory/2084-119-0x0000000000400000-0x0000000000476000-memory.dmpFilesize
472KB
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memory/2084-124-0x0000000002DB0000-0x0000000002DB1000-memory.dmpFilesize
4KB
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memory/2084-120-0x000000000047032E-mapping.dmp
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memory/2392-125-0x0000000000000000-mapping.dmp
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memory/3208-115-0x0000000002540000-0x0000000002541000-memory.dmpFilesize
4KB