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Analysis
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max time kernel
155s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231127-en -
resource tags
arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system -
submitted
12/12/2023, 14:56
Static task
static1
Behavioral task
behavioral1
Sample
tuc3.exe
Resource
win7-20231130-en
Behavioral task
behavioral2
Sample
tuc3.exe
Resource
win10v2004-20231127-en
General
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Target
tuc3.exe
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Size
7.2MB
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MD5
4c617c2e8cec061e2ead42ef928f0eef
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SHA1
ad7578978f6dc9bffcb1c6ace227b2ae9d71202b
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SHA256
a232c6af1ae8d06d3e0c203baef715415c8c967debc74c3ec165f8c04632ea6d
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SHA512
8231bf46db1eb22a31d672a4ac8bfc89b1558c9792030ae351fa88b6bc0ac2cb9b2d59709d8d7a6936debab5a9f5ff6170c629a34afc4792e0422087c007eda7
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SSDEEP
196608:Qxm50EF70ZaWLZ97vnC8LpS7+bI9cpSzj:qEt0Zak7aIA7kSzj
Malware Config
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1868 tuc3.tmp 4632 numgif.exe 392 numgif.exe -
Loads dropped DLL 3 IoCs
pid Process 1868 tuc3.tmp 1868 tuc3.tmp 1868 tuc3.tmp -
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
description ioc Destination IP 81.31.197.38 -
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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Drops file in Program Files directory 63 IoCs
description ioc Process File created C:\Program Files (x86)\numGIF\bin\x86\is-8M8IH.tmp tuc3.tmp File opened for modification C:\Program Files (x86)\numGIF\uninstall\unins000.dat tuc3.tmp File created C:\Program Files (x86)\numGIF\uninstall\is-OBUCA.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\stuff\is-802QI.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-QTV6E.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-LR1V5.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-0VQLB.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-C5KGO.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-6TRME.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-P256G.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-MMGQG.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\stuff\is-K6QN2.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-OHAGT.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\lessmsi\is-83G0D.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-K9T0E.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-17CDV.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-0B07E.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-V0J1L.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-ROFP5.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-90ETK.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-VPE1M.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-8VAQ3.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-GK1DD.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-4RTL4.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-8PIKH.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-235TE.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-GCHVL.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-9FM1R.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-5P598.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-TMICP.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-UDHQT.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-9EEPS.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-D885G.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\uninstall\unins000.dat tuc3.tmp File created C:\Program Files (x86)\numGIF\stuff\is-7HPD2.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\stuff\is-RLC89.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-NLBVT.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-2J0SG.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\is-P68PR.tmp tuc3.tmp File opened for modification C:\Program Files (x86)\numGIF\numgif.exe tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-DK7QU.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-U3M63.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-ET6QG.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-VDR7S.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-EELL4.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\plugins\internal\is-KKBUL.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-2P9ET.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-24TFO.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-6MFFM.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-6M27G.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-6H4SA.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-8JF6C.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-OGP5S.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-JDFA6.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-B63C6.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-GKVDC.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-G3H44.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-3OSHR.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-83M38.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-VIQ64.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-U6J9S.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\plugins\internal\is-89JBJ.tmp tuc3.tmp File created C:\Program Files (x86)\numGIF\bin\x86\is-6NN5T.tmp tuc3.tmp -
Runs net.exe
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Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 1868 tuc3.tmp -
Suspicious use of WriteProcessMemory 18 IoCs
description pid Process procid_target PID 1256 wrote to memory of 1868 1256 tuc3.exe 92 PID 1256 wrote to memory of 1868 1256 tuc3.exe 92 PID 1256 wrote to memory of 1868 1256 tuc3.exe 92 PID 1868 wrote to memory of 3604 1868 tuc3.tmp 94 PID 1868 wrote to memory of 3604 1868 tuc3.tmp 94 PID 1868 wrote to memory of 3604 1868 tuc3.tmp 94 PID 1868 wrote to memory of 4632 1868 tuc3.tmp 96 PID 1868 wrote to memory of 4632 1868 tuc3.tmp 96 PID 1868 wrote to memory of 4632 1868 tuc3.tmp 96 PID 1868 wrote to memory of 3536 1868 tuc3.tmp 99 PID 1868 wrote to memory of 3536 1868 tuc3.tmp 99 PID 1868 wrote to memory of 3536 1868 tuc3.tmp 99 PID 1868 wrote to memory of 392 1868 tuc3.tmp 98 PID 1868 wrote to memory of 392 1868 tuc3.tmp 98 PID 1868 wrote to memory of 392 1868 tuc3.tmp 98 PID 3536 wrote to memory of 4576 3536 net.exe 100 PID 3536 wrote to memory of 4576 3536 net.exe 100 PID 3536 wrote to memory of 4576 3536 net.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\tuc3.exe"C:\Users\Admin\AppData\Local\Temp\tuc3.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:1256 -
C:\Users\Admin\AppData\Local\Temp\is-L7L76.tmp\tuc3.tmp"C:\Users\Admin\AppData\Local\Temp\is-L7L76.tmp\tuc3.tmp" /SL5="$B005E,7257737,121856,C:\Users\Admin\AppData\Local\Temp\tuc3.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1868 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\system32\schtasks.exe" /Query3⤵PID:3604
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C:\Program Files (x86)\numGIF\numgif.exe"C:\Program Files (x86)\numGIF\numgif.exe" -i3⤵
- Executes dropped EXE
PID:4632
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C:\Program Files (x86)\numGIF\numgif.exe"C:\Program Files (x86)\numGIF\numgif.exe" -s3⤵
- Executes dropped EXE
PID:392
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C:\Windows\SysWOW64\net.exe"C:\Windows\system32\net.exe" helpmsg 123⤵
- Suspicious use of WriteProcessMemory
PID:3536 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 helpmsg 124⤵PID:4576
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2.1MB
MD557ced71d2e317eabb615aa41744d1b1f
SHA16cc65d30c5fd466c87947a037b4b334150cd07c6
SHA256063e3ba1e7b81c595bcda4226b7258730c769626de660452e5aefc7f0ad45737
SHA5122c76683fcacdbe5497fd042424f1ac4da0cd74f62f0516e1bc77487bce7fed98b21836582e6ed8eee157bf854bc550dec6e4697919cd21adf76ae400fcb98662
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
19KB
MD53adaa386b671c2df3bae5b39dc093008
SHA1067cf95fbdb922d81db58432c46930f86d23dded
SHA25671cd2f5bc6e13b8349a7c98697c6d2e3fcdeea92699cedd591875bea869fae38
SHA512bbe4187758d1a69f75a8cca6b3184e0c20cf8701b16531b55ed4987497934b3c9ef66ecd5e6b83c7357f69734f1c8301b9f82f0a024bb693b732a2d5760fd303
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Filesize
687KB
MD5f448d7f4b76e5c9c3a4eaff16a8b9b73
SHA131808f1ffa84c954376975b7cdb0007e6b762488
SHA2567233b85eb0f8b3aa5cae3811d727aa8742fec4d1091c120a0fe15006f424cc49
SHA512f8197458cd2764c0b852dac34f9bf361110a7dc86903024a97c7bcd3f77b148342bf45e3c2b60f6af8198ae3b83938dbaad5e007d71a0f88006f3a0618cf36f4