Analysis
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max time kernel
292s -
max time network
255s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
14-06-2024 00:12
Static task
static1
Behavioral task
behavioral1
Sample
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe
Resource
win10-20240404-en
General
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Target
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe
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Size
4.7MB
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MD5
f9cfd8f9afb7ee87e7ad049b7a92423f
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SHA1
cf336b758b82d17f8be83a5d93c7d5aebd0e4638
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SHA256
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861
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SHA512
388ca19270ca8addf4e93d4ab9c3225cdefba6afaf0061d11030f09c57fc0372e5b1bb86f9d5cb902354a4d13d8afffec3e073ac6027fdc4ea6d15e2d8f9fcac
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SSDEEP
98304:mMX40drbC2Z+oMvtyIGM1ONsQNaMZE8Q0jEy0mKPrM/cqPFyvH66:5/Fn0FJzONfeNy9Y80x
Malware Config
Extracted
socks5systemz
bmupywd.com
http://bmupywd.com/search/?q=67e28dd8685af379125bfd4e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa49e8889b5e4fa9281ae978f271ea771795af8e05c645db22f31dfe339426fa11a366c350adb719a9577e55b8603e983a608ff712c2eb95993f
Signatures
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Detect Socks5Systemz Payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/4408-82-0x00000000028D0000-0x0000000002972000-memory.dmp family_socks5systemz -
Socks5Systemz
Socks5Systemz is a botnet written in C++.
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Executes dropped EXE 3 IoCs
Processes:
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmplesserextent32.exelesserextent32.exepid process 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp 4008 lesserextent32.exe 4408 lesserextent32.exe -
Loads dropped DLL 1 IoCs
Processes:
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmppid process 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp -
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
Processes:
description ioc Destination IP 141.98.234.31 -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmppid process 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exefdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmpdescription pid process target process PID 3104 wrote to memory of 3672 3104 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp PID 3104 wrote to memory of 3672 3104 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp PID 3104 wrote to memory of 3672 3104 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp PID 3672 wrote to memory of 4008 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp lesserextent32.exe PID 3672 wrote to memory of 4008 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp lesserextent32.exe PID 3672 wrote to memory of 4008 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp lesserextent32.exe PID 3672 wrote to memory of 4408 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp lesserextent32.exe PID 3672 wrote to memory of 4408 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp lesserextent32.exe PID 3672 wrote to memory of 4408 3672 fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp lesserextent32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe"C:\Users\Admin\AppData\Local\Temp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:3104 -
C:\Users\Admin\AppData\Local\Temp\is-G2IG4.tmp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp"C:\Users\Admin\AppData\Local\Temp\is-G2IG4.tmp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmp" /SL5="$50220,4696942,54272,C:\Users\Admin\AppData\Local\Temp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:3672 -
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i3⤵
- Executes dropped EXE
PID:4008 -
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s3⤵
- Executes dropped EXE
PID:4408
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exeFilesize
2.8MB
MD5194d5f3439c81fec196f54abd9c2073a
SHA16afb33b612e1ae4b21d78809e6c8ca0ab32624f0
SHA2566822f5450afe2c2622ebd989deb746a6f5f7a8f8278ddf7889d584700031d6e1
SHA51299598bda27e248e304472490e70a146c83a515258844948c847df1b26e1efbbf894e38299cade6e5bd64909252ade9ca16101b30cbb3b1ce716a4b20c5fcf9c8
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C:\Users\Admin\AppData\Local\Temp\is-G2IG4.tmp\fdd9b956e7a373fbd8b41514b78a19637b3d033f18a98aab2dec7e90a4f53861.tmpFilesize
680KB
MD5dff4f58a01a8e88e4a2f821ca761d901
SHA1e67e24669220213f895b68c0d662b02b03469b4a
SHA25691b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76
SHA512049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a
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\Users\Admin\AppData\Local\Temp\is-DJ6NH.tmp\_isetup\_iscrypt.dllFilesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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memory/3104-0-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
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memory/3104-3-0x0000000000401000-0x000000000040B000-memory.dmpFilesize
40KB
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memory/3104-67-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
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memory/3672-10-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/3672-68-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/4008-59-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4008-60-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4008-64-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-78-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-97-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-75-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-69-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-81-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-82-0x00000000028D0000-0x0000000002972000-memory.dmpFilesize
648KB
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memory/4408-86-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-91-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-94-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-72-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-100-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-103-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-106-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-110-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-113-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-116-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-119-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-122-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-125-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB
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memory/4408-130-0x0000000000400000-0x00000000006C5000-memory.dmpFilesize
2.8MB