Analysis
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max time kernel
151s -
max time network
48s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
26-11-2022 22:46
Static task
static1
Behavioral task
behavioral1
Sample
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe
Resource
win10v2004-20220812-en
General
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Target
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe
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Size
232KB
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MD5
d7d5a8136962ee21e14fa33f127064da
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SHA1
f97737161502842fa07add7b89be3b34271df3c3
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SHA256
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f
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SHA512
da0cade98fae9ef332ebec7b51b513b73402da1e4ed5ba3b1d7078caa957d9bf66da3ca9e865e54102aed546f5948ffad8bae87c4abb19363df97f8d4eb26a2b
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SSDEEP
3072:AMdgD6dbNFko1ayFCpEZWCfEgl+D7t5VOcoF/7UbNVLPLcqcoMaUfdqMwuW0Gc3I:Jdge1NFVH0pwpMfN5V7bzooMkMwHc0U
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
Processes:
winvrtd.exepid process 1416 winvrtd.exe -
Loads dropped DLL 2 IoCs
Processes:
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exepid process 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exedescription ioc process File opened for modification \??\PhysicalDrive0 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe -
Drops file in System32 directory 3 IoCs
Processes:
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exewinvrtd.exedescription ioc process File created C:\Windows\SysWOW64\winvrtd.exe 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe File opened for modification C:\Windows\SysWOW64\winvtd.db 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe File created C:\Windows\SysWOW64\winvtd32.dll winvrtd.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of FindShellTrayWindow 14 IoCs
Processes:
winvrtd.exepid process 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe 1416 winvrtd.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exepid process 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exedescription pid process target process PID 832 wrote to memory of 1416 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe winvrtd.exe PID 832 wrote to memory of 1416 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe winvrtd.exe PID 832 wrote to memory of 1416 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe winvrtd.exe PID 832 wrote to memory of 1416 832 2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe winvrtd.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe"C:\Users\Admin\AppData\Local\Temp\2045a435826ab52f8f80b9d1de96c6be728971cbdc2dd601864d358a6977c92f.exe"1⤵
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\winvrtd.exe"C:\Windows\system32\winvrtd.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of FindShellTrayWindow
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Windows\SysWOW64\winvrtd.exeFilesize
128KB
MD5b4e8d5954975ae43cbf09bf0d7992683
SHA1c530cfaf2d82d3cc1839e8dbca40148b276fad79
SHA2565bb33f70e6dd09970031cfadbce415345f0ce77ea78c030376f8d54d8d5c8142
SHA5120da4996cd7d22517f9ba265ece55f802f651b43cbfd17f878365a794d991574dc24b7361c22c8886eac135d86663296812d7fcb9ed2650f44a63339010775810
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\Windows\SysWOW64\winvrtd.exeFilesize
128KB
MD5b4e8d5954975ae43cbf09bf0d7992683
SHA1c530cfaf2d82d3cc1839e8dbca40148b276fad79
SHA2565bb33f70e6dd09970031cfadbce415345f0ce77ea78c030376f8d54d8d5c8142
SHA5120da4996cd7d22517f9ba265ece55f802f651b43cbfd17f878365a794d991574dc24b7361c22c8886eac135d86663296812d7fcb9ed2650f44a63339010775810
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\Windows\SysWOW64\winvrtd.exeFilesize
128KB
MD5b4e8d5954975ae43cbf09bf0d7992683
SHA1c530cfaf2d82d3cc1839e8dbca40148b276fad79
SHA2565bb33f70e6dd09970031cfadbce415345f0ce77ea78c030376f8d54d8d5c8142
SHA5120da4996cd7d22517f9ba265ece55f802f651b43cbfd17f878365a794d991574dc24b7361c22c8886eac135d86663296812d7fcb9ed2650f44a63339010775810
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memory/832-58-0x0000000000400000-0x000000000046B000-memory.dmpFilesize
428KB
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memory/832-59-0x0000000000400000-0x000000000046B000-memory.dmpFilesize
428KB
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memory/832-60-0x0000000000400000-0x000000000046B000-memory.dmpFilesize
428KB
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memory/832-61-0x0000000000400000-0x000000000046B000-memory.dmpFilesize
428KB
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memory/832-62-0x00000000007F0000-0x0000000000800000-memory.dmpFilesize
64KB
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memory/832-54-0x0000000075921000-0x0000000075923000-memory.dmpFilesize
8KB
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memory/832-56-0x0000000000280000-0x00000000002BE000-memory.dmpFilesize
248KB
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memory/832-55-0x0000000000400000-0x000000000046B000-memory.dmpFilesize
428KB
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memory/832-68-0x0000000000400000-0x000000000046B000-memory.dmpFilesize
428KB
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memory/832-69-0x0000000000280000-0x00000000002BE000-memory.dmpFilesize
248KB
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memory/832-70-0x00000000007F0000-0x0000000000800000-memory.dmpFilesize
64KB
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memory/1416-65-0x0000000000000000-mapping.dmp