Resubmissions
07-04-2023 08:11
230407-j3f3zaae2s 707-04-2023 08:08
230407-j1q56aad91 707-04-2023 07:42
230407-jj2wbsad6z 7Analysis
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max time kernel
150s -
max time network
33s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
07-04-2023 08:08
Static task
static1
Behavioral task
behavioral1
Sample
MEMZ 3.0/MEMZ.bat
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
MEMZ 3.0/MEMZ.bat
Resource
win10v2004-20230220-en
Behavioral task
behavioral3
Sample
MEMZ 3.0/MEMZ.exe
Resource
win7-20230220-en
Behavioral task
behavioral4
Sample
MEMZ 3.0/MEMZ.exe
Resource
win10v2004-20230220-en
General
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Target
MEMZ 3.0/MEMZ.bat
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Size
12KB
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MD5
13a43c26bb98449fd82d2a552877013a
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SHA1
71eb7dc393ac1f204488e11f5c1eef56f1e746af
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SHA256
5f52365accb76d679b2b3946870439a62eb8936b9a0595f0fb0198138106b513
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SHA512
602518b238d80010fa88c2c88699f70645513963ef4f148a0345675738cf9b0c23b9aeb899d9f7830cc1e5c7e9c7147b2dc4a9222770b4a052ee0c879062cd5a
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SSDEEP
384:nnLhRNiqt0kCH2LR0GPXxGiZgCz+KG/yKhLdW79HOli+lz3:nLhRN9t0SR4iZtzlREBWhuF
Malware Config
Signatures
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Executes dropped EXE 7 IoCs
Processes:
MEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exepid process 268 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1820 MEMZ.exe 1540 MEMZ.exe 600 MEMZ.exe 1140 MEMZ.exe -
Loads dropped DLL 1 IoCs
Processes:
MEMZ.exepid process 268 MEMZ.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:
MEMZ.exedescription ioc process File opened for modification \??\PhysicalDrive0 MEMZ.exe -
Drops file in System32 directory 1 IoCs
Processes:
mmc.exedescription ioc process File opened for modification C:\Windows\System32\devmgmt.msc mmc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
Processes:
MEMZ.exepid process 268 MEMZ.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
MEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exeMEMZ.exepid process 1824 MEMZ.exe 1868 MEMZ.exe 1820 MEMZ.exe 1540 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1820 MEMZ.exe 1540 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1820 MEMZ.exe 1540 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1820 MEMZ.exe 1540 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1820 MEMZ.exe 1540 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe 600 MEMZ.exe 1824 MEMZ.exe 1868 MEMZ.exe 1540 MEMZ.exe 1820 MEMZ.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
mmc.exepid process 1528 mmc.exe -
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
mmc.exeAUDIODG.EXEdescription pid process Token: 33 1528 mmc.exe Token: SeIncBasePriorityPrivilege 1528 mmc.exe Token: 33 1528 mmc.exe Token: SeIncBasePriorityPrivilege 1528 mmc.exe Token: 33 1332 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1332 AUDIODG.EXE Token: 33 1332 AUDIODG.EXE Token: SeIncBasePriorityPrivilege 1332 AUDIODG.EXE -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
cscript.exepid process 916 cscript.exe -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
mmc.exemmc.exepid process 748 mmc.exe 1528 mmc.exe 1528 mmc.exe -
Suspicious use of WriteProcessMemory 43 IoCs
Processes:
cmd.exeMEMZ.exeMEMZ.exemmc.exedescription pid process target process PID 1712 wrote to memory of 916 1712 cmd.exe cscript.exe PID 1712 wrote to memory of 916 1712 cmd.exe cscript.exe PID 1712 wrote to memory of 916 1712 cmd.exe cscript.exe PID 1712 wrote to memory of 268 1712 cmd.exe MEMZ.exe PID 1712 wrote to memory of 268 1712 cmd.exe MEMZ.exe PID 1712 wrote to memory of 268 1712 cmd.exe MEMZ.exe PID 1712 wrote to memory of 268 1712 cmd.exe MEMZ.exe PID 268 wrote to memory of 1824 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1824 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1824 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1824 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1868 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1868 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1868 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1868 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1820 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1820 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1820 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1820 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1540 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1540 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1540 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1540 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 600 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 600 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 600 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 600 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1140 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1140 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1140 268 MEMZ.exe MEMZ.exe PID 268 wrote to memory of 1140 268 MEMZ.exe MEMZ.exe PID 1140 wrote to memory of 1336 1140 MEMZ.exe notepad.exe PID 1140 wrote to memory of 1336 1140 MEMZ.exe notepad.exe PID 1140 wrote to memory of 1336 1140 MEMZ.exe notepad.exe PID 1140 wrote to memory of 1336 1140 MEMZ.exe notepad.exe PID 1140 wrote to memory of 748 1140 MEMZ.exe mmc.exe PID 1140 wrote to memory of 748 1140 MEMZ.exe mmc.exe PID 1140 wrote to memory of 748 1140 MEMZ.exe mmc.exe PID 1140 wrote to memory of 748 1140 MEMZ.exe mmc.exe PID 748 wrote to memory of 1528 748 mmc.exe mmc.exe PID 748 wrote to memory of 1528 748 mmc.exe mmc.exe PID 748 wrote to memory of 1528 748 mmc.exe mmc.exe PID 748 wrote to memory of 1528 748 mmc.exe mmc.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\MEMZ.bat"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cscript.execscript x.js2⤵
- Suspicious use of FindShellTrayWindow
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: CmdExeWriteProcessMemorySpam
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /watchdog3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Roaming\MEMZ.exe"C:\Users\Admin\AppData\Roaming\MEMZ.exe" /main3⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\notepad.exe"C:\Windows\System32\notepad.exe" \note.txt4⤵
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C:\Windows\SysWOW64\mmc.exe"C:\Windows\system32\mmc.exe" "C:\Windows\System32\devmgmt.msc"4⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\mmc.exe"C:\Windows\System32\devmgmt.msc" "C:\Windows\System32\devmgmt.msc"5⤵
- Drops file in System32 directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Windows\system32\AUDIODG.EXEC:\Windows\system32\AUDIODG.EXE 0x5a81⤵
- 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\Temp\MEMZ 3.0\xFilesize
4KB
MD5c6e68ff1dc039af122429c3c5418630f
SHA1771938ab02aaf6714782ea1c70420794848b1d9c
SHA256b18e0bb23b9b78ca561b9499853ec5be84f67fcb7db5c7e207c6da1b89c17dbb
SHA512837b8b31d381030b79a1b85449238b8770999dde21dd705aec81a0205cfc40cb2f65fb7877de479bae9ca96c1233a62078332c93db764389bd6f26985b61c9b7
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C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\xFilesize
10KB
MD5fc59b7d2eb1edbb9c8cb9eb08115a98e
SHA190a6479ce14f8548df54c434c0a524e25efd9d17
SHA256a05b9be9dd87492f265094146e18d628744c6b09c0e7efaabf228a9f1091a279
SHA5123392cfc0dbddb37932e76da5a49f4e010a49aaa863c882b85cccab676cd458cfc8f880d8a0e0dc7581175f447e6b0a002da1591ecd14756650bb74996eacd2b1
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C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\x.jsFilesize
448B
MD58eec8704d2a7bc80b95b7460c06f4854
SHA11b34585c1fa7ec0bd0505478ac9dbb8b8d19f326
SHA256aa01b8864b43e92077a106ed3d4656a511f3ba1910fba40c78a32ee6a621d596
SHA512e274b92810e9a30627a65f87448d784967a2fcfbf49858cbe6ccb841f09e0f53fde253ecc1ea0c7de491d8cc56a6cf8c79d1b7c657e72928cfb0479d11035210
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C:\Users\Admin\AppData\Local\Temp\MEMZ 3.0\z.zipFilesize
7KB
MD5cf0c19ef6909e5c1f10c8460ba9299d8
SHA1875b575c124acfc1a4a21c1e05acb9690e50b880
SHA256abb834ebd4b7d7f8ddf545976818f41b3cb51d2b895038a56457616d3a2c6776
SHA512d930a022a373c283f35d103e277487c2034a0b0814913b8f6ec695b45e20528667aa830eeab58e4483d523bd6a755a16a5379095cb137db6c91909a545a19a2f
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C:\Users\Admin\AppData\Local\Temp\MEMZ3~1.0\z.zipFilesize
7KB
MD5cf0c19ef6909e5c1f10c8460ba9299d8
SHA1875b575c124acfc1a4a21c1e05acb9690e50b880
SHA256abb834ebd4b7d7f8ddf545976818f41b3cb51d2b895038a56457616d3a2c6776
SHA512d930a022a373c283f35d103e277487c2034a0b0814913b8f6ec695b45e20528667aa830eeab58e4483d523bd6a755a16a5379095cb137db6c91909a545a19a2f
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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C:\note.txtFilesize
218B
MD5afa6955439b8d516721231029fb9ca1b
SHA1087a043cc123c0c0df2ffadcf8e71e3ac86bbae9
SHA2568e9f20f6864c66576536c0b866c6ffdcf11397db67fe120e972e244c3c022270
SHA5125da21a31fbc4e8250dffed30f66b896bdf007ac91948140334fe36a3f010e1bac3e70a07e9f3eb9da8633189091fd5cadcabbaacd3e01da0fe7ae28a11b3dddf
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\Users\Admin\AppData\Roaming\MEMZ.exeFilesize
12KB
MD5a7bcf7ea8e9f3f36ebfb85b823e39d91
SHA1761168201520c199dba68add3a607922d8d4a86e
SHA2563ff64f10603f0330fa2386ff99471ca789391ace969bd0ec1c1b8ce1b4a6db42
SHA51289923b669d31e590189fd06619bf27e47c5a47e82be6ae71fdb1b9b3b30b06fb7ca8ffed6d5c41ac410a367f2eb07589291e95a2644877d6bffd52775a5b1523
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memory/1528-228-0x00000000022F0000-0x00000000022F1000-memory.dmpFilesize
4KB
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memory/1528-229-0x000007FEF6B60000-0x000007FEF6B9A000-memory.dmpFilesize
232KB