Analysis
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max time kernel
39s -
max time network
43s -
platform
windows10-1703_x64 -
resource
win10-20230220-en -
resource tags
arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system -
submitted
29-03-2023 16:18
Static task
static1
Behavioral task
behavioral1
Sample
internet-explorer-11-windows-7_otau-w1.exe
Resource
win10-20230220-en
General
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Target
internet-explorer-11-windows-7_otau-w1.exe
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Size
1.7MB
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MD5
99a9fbd5fee72ce51585309390a46717
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SHA1
ff39c56312090a909c2c0c82629c552a3b252a98
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SHA256
833064195b0c96bce9a8c00dc95df6bd9fce1092c1260ba0e877810bfc44b0aa
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SHA512
97f9a98fb48c8281818163d3dbe66fa246e1fe6a5a67f15175419992b0ca389cbe086e457177c21ce9c99ff05a1e0b508812cdf30220090a438dd8c94f73c6b7
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SSDEEP
24576:R4nXubIQGyxbPV0db26Wmd0l4sv1Et9uGpckT52zedlq89Ws5uIzk5aM/phdO7:Rqe3f61mZSffPMWrQ0ZkA
Malware Config
Signatures
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Downloads MZ/PE file
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Executes dropped EXE 3 IoCs
Processes:
internet-explorer-11-windows-7_otau-w1.tmpfile_otau-w1.exefile_otau-w1.tmppid process 2872 internet-explorer-11-windows-7_otau-w1.tmp 1708 file_otau-w1.exe 2076 file_otau-w1.tmp -
Loads dropped DLL 3 IoCs
Processes:
file_otau-w1.tmppid process 2076 file_otau-w1.tmp 2076 file_otau-w1.tmp 2076 file_otau-w1.tmp -
Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.
Processes:
description flow ioc HTTP User-Agent header 5 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
internet-explorer-11-windows-7_otau-w1.tmppid process 2872 internet-explorer-11-windows-7_otau-w1.tmp -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
internet-explorer-11-windows-7_otau-w1.exeinternet-explorer-11-windows-7_otau-w1.tmpfile_otau-w1.exedescription pid process target process PID 2448 wrote to memory of 2872 2448 internet-explorer-11-windows-7_otau-w1.exe internet-explorer-11-windows-7_otau-w1.tmp PID 2448 wrote to memory of 2872 2448 internet-explorer-11-windows-7_otau-w1.exe internet-explorer-11-windows-7_otau-w1.tmp PID 2448 wrote to memory of 2872 2448 internet-explorer-11-windows-7_otau-w1.exe internet-explorer-11-windows-7_otau-w1.tmp PID 2872 wrote to memory of 1708 2872 internet-explorer-11-windows-7_otau-w1.tmp file_otau-w1.exe PID 2872 wrote to memory of 1708 2872 internet-explorer-11-windows-7_otau-w1.tmp file_otau-w1.exe PID 2872 wrote to memory of 1708 2872 internet-explorer-11-windows-7_otau-w1.tmp file_otau-w1.exe PID 1708 wrote to memory of 2076 1708 file_otau-w1.exe file_otau-w1.tmp PID 1708 wrote to memory of 2076 1708 file_otau-w1.exe file_otau-w1.tmp PID 1708 wrote to memory of 2076 1708 file_otau-w1.exe file_otau-w1.tmp
Processes
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C:\Users\Admin\AppData\Local\Temp\internet-explorer-11-windows-7_otau-w1.exe"C:\Users\Admin\AppData\Local\Temp\internet-explorer-11-windows-7_otau-w1.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-J27BB.tmp\internet-explorer-11-windows-7_otau-w1.tmp"C:\Users\Admin\AppData\Local\Temp\is-J27BB.tmp\internet-explorer-11-windows-7_otau-w1.tmp" /SL5="$D01CA,831488,831488,C:\Users\Admin\AppData\Local\Temp\internet-explorer-11-windows-7_otau-w1.exe"2⤵
- Executes dropped EXE
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-HIDFK.tmp\file_otau-w1.exe"C:\Users\Admin\AppData\Local\Temp\is-HIDFK.tmp\file_otau-w1.exe" /LANG=en /NA=Rh85hR643⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-OLVJH.tmp\file_otau-w1.tmp"C:\Users\Admin\AppData\Local\Temp\is-OLVJH.tmp\file_otau-w1.tmp" /SL5="$301FC,1559708,780800,C:\Users\Admin\AppData\Local\Temp\is-HIDFK.tmp\file_otau-w1.exe" /LANG=en /NA=Rh85hR644⤵
- Executes dropped EXE
- Loads dropped DLL
Network
MITRE ATT&CK Matrix
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\is-HIDFK.tmp\file_otau-w1.exeFilesize
2.3MB
MD5a5e25c2ce624cea11fe6baa993131694
SHA1ed688ea1be69883fd2d3e8028833f923fc25ac2e
SHA25621844aefb964dd1f78dfec021744eed2473f1e5e11781180bde221739b47eed1
SHA512b0c35f8649e54b450c20b61d829725d01bfa4cc7988e13314f137b7c3a0d151af41da80615f9a8b862e45025781443c8128445afcee265289c24cf7a87582704
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C:\Users\Admin\AppData\Local\Temp\is-HIDFK.tmp\file_otau-w1.exeFilesize
2.3MB
MD5a5e25c2ce624cea11fe6baa993131694
SHA1ed688ea1be69883fd2d3e8028833f923fc25ac2e
SHA25621844aefb964dd1f78dfec021744eed2473f1e5e11781180bde221739b47eed1
SHA512b0c35f8649e54b450c20b61d829725d01bfa4cc7988e13314f137b7c3a0d151af41da80615f9a8b862e45025781443c8128445afcee265289c24cf7a87582704
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C:\Users\Admin\AppData\Local\Temp\is-J27BB.tmp\internet-explorer-11-windows-7_otau-w1.tmpFilesize
3.0MB
MD50c229cd26910820581b5809c62fe5619
SHA128c0630385b21f29e3e2bcc34865e5d15726eaa0
SHA256abfa49a915d2e0a82561ca440365e6a2d59f228533b56a8f78addf000a1081b3
SHA512b8ff3dc65f7c0e03721572af738ec4886ba895dc70c1a41a3ce8c8abe0946d167cec71913017fd11d5892452db761ea88901a5a09a681ae779dd531edbb83a2a
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C:\Users\Admin\AppData\Local\Temp\is-OLVJH.tmp\file_otau-w1.tmpFilesize
2.9MB
MD5623a3abd7b318e1f410b1e12a42c7b71
SHA188e34041850ec4019dae469adc608e867b936d21
SHA256fe1a4555d18617532248d2eaa8d3fcc2c74182f994a964a62cf418295e8554d3
SHA5129afea88e4617e0f11416c2a2c416a6aa2d5d1f702d98d2cc223b399736191a6d002d1b717020ca6aae09e835c6356b7ddafad71e101dacab15967d89a105e391
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\Users\Admin\AppData\Local\Temp\is-0L903.tmp\Helper.dllFilesize
2.0MB
MD54eb0347e66fa465f602e52c03e5c0b4b
SHA1fdfedb72614d10766565b7f12ab87f1fdca3ea81
SHA256c73e53cbb7b98feafe27cc7de8fdad51df438e2235e91891461c5123888f73cc
SHA5124c909a451059628119f92b2f0c8bcd67b31f63b57d5339b6ce8fd930be5c9baf261339fdd9da820321be497df8889ce7594b7bfaadbaa43c694156651bf6c1fd
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\Users\Admin\AppData\Local\Temp\is-0L903.tmp\botva2.dllFilesize
37KB
MD567965a5957a61867d661f05ae1f4773e
SHA1f14c0a4f154dc685bb7c65b2d804a02a0fb2360d
SHA256450b9b0ba25bf068afbc2b23d252585a19e282939bf38326384ea9112dfd0105
SHA512c6942818b9026dc5db2d62999d32cf99fe7289f79a28b8345af17acf9d13b2229a5e917a48ff1f6d59715bdbcb00c1625e0302abcfe10ca7e0475762e0a3f41b
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\Users\Admin\AppData\Local\Temp\is-0L903.tmp\botva2.dllFilesize
37KB
MD567965a5957a61867d661f05ae1f4773e
SHA1f14c0a4f154dc685bb7c65b2d804a02a0fb2360d
SHA256450b9b0ba25bf068afbc2b23d252585a19e282939bf38326384ea9112dfd0105
SHA512c6942818b9026dc5db2d62999d32cf99fe7289f79a28b8345af17acf9d13b2229a5e917a48ff1f6d59715bdbcb00c1625e0302abcfe10ca7e0475762e0a3f41b
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memory/1708-153-0x0000000000400000-0x00000000004CC000-memory.dmpFilesize
816KB
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memory/1708-165-0x0000000000400000-0x00000000004CC000-memory.dmpFilesize
816KB
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memory/1708-132-0x0000000000400000-0x00000000004CC000-memory.dmpFilesize
816KB
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memory/2076-154-0x0000000000400000-0x00000000006EE000-memory.dmpFilesize
2.9MB
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memory/2076-158-0x0000000004040000-0x000000000404F000-memory.dmpFilesize
60KB
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memory/2076-146-0x0000000000890000-0x0000000000891000-memory.dmpFilesize
4KB
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memory/2076-163-0x0000000000400000-0x00000000006EE000-memory.dmpFilesize
2.9MB
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memory/2448-152-0x0000000000400000-0x00000000004D8000-memory.dmpFilesize
864KB
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memory/2448-121-0x0000000000400000-0x00000000004D8000-memory.dmpFilesize
864KB
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memory/2448-147-0x0000000000400000-0x00000000004D8000-memory.dmpFilesize
864KB
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memory/2872-149-0x00000000008B0000-0x00000000008B1000-memory.dmpFilesize
4KB
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memory/2872-150-0x0000000000400000-0x000000000071A000-memory.dmpFilesize
3.1MB
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memory/2872-148-0x0000000000400000-0x000000000071A000-memory.dmpFilesize
3.1MB
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memory/2872-126-0x00000000008B0000-0x00000000008B1000-memory.dmpFilesize
4KB