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Analysis
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max time kernel
149s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20231127-en -
resource tags
arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system -
submitted
11/12/2023, 15:51
Static task
static1
Behavioral task
behavioral1
Sample
tuc4.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
tuc4.exe
Resource
win10v2004-20231127-en
General
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Target
tuc4.exe
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Size
6.9MB
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MD5
8414fe2ac1247650f33d24c59a1e810c
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SHA1
85efb140e6a8ea7d5de2d66f6e48423e52253154
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SHA256
85d5367d4e844cbd05e5d81acdddabe8b43227d29fe92848d01562786289cf1f
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SHA512
9bf0bdaeb30d2b5d398ba143f91bafc0d6835281119a14cec9d23c9096a0692c1bfca4c32ff05946e977787eade74cc3471e5f49878971a46ce39fde3d6f8de8
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SSDEEP
196608:RDoG3bFqjpLC0TSMLsn33HR83v9i8l7INzj:RDyNLCWZ2HS9iQ7INzj
Malware Config
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4996 tuc4.tmp 1160 wmaconvert.exe 2412 wmaconvert.exe -
Loads dropped DLL 3 IoCs
pid Process 4996 tuc4.tmp 4996 tuc4.tmp 4996 tuc4.tmp -
Unexpected DNS network traffic destination 2 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
description ioc Destination IP 152.89.198.214 Destination IP 194.49.94.194 -
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)\ConvertWMA\bin\x86\is-4EME3.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\lessmsi\is-M229K.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\plugins\internal\is-IVE0K.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-ADFR4.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-UR51L.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-LB284.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-HRALJ.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-KRJSB.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-KRVRE.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-8R9HJ.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-R6T1D.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\stuff\is-BHFEJ.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-5TEDR.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-NI0D5.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-BQDIO.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-SDHD5.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-601R4.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-8JOIC.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-QEVGO.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-2KQOD.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\plugins\internal\is-K8SQA.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\is-JR308.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\stuff\is-AMSJI.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-J1OMK.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-J38OP.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-97PBO.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-ING1I.tmp tuc4.tmp File opened for modification C:\Program Files (x86)\ConvertWMA\uninstall\unins000.dat tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\uninstall\unins000.dat tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-0IN7T.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-KFE9G.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-RQMCM.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-1URAV.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\stuff\is-I1LVM.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\stuff\is-6T12C.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-GBPV3.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-LF4HD.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\uninstall\is-F98B5.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-HIHNC.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-2SFC3.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-LQJKC.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-J6DVV.tmp tuc4.tmp File opened for modification C:\Program Files (x86)\ConvertWMA\wmaconvert.exe tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-HC93O.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-616SC.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-1L7QD.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-F2SGP.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-BS2A6.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-DR2B0.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-DFI9O.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-O96V5.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-KFA1E.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-45RC4.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-D8K6T.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-A1R9T.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-ERQHP.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-8EFMJ.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-84D0V.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-E28NO.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-UP6EP.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-U4J0L.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-EB9M4.tmp tuc4.tmp File created C:\Program Files (x86)\ConvertWMA\bin\x86\is-HMH4N.tmp tuc4.tmp -
Runs net.exe
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Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4996 tuc4.tmp -
Suspicious use of WriteProcessMemory 18 IoCs
description pid Process procid_target PID 708 wrote to memory of 4996 708 tuc4.exe 87 PID 708 wrote to memory of 4996 708 tuc4.exe 87 PID 708 wrote to memory of 4996 708 tuc4.exe 87 PID 4996 wrote to memory of 2880 4996 tuc4.tmp 90 PID 4996 wrote to memory of 2880 4996 tuc4.tmp 90 PID 4996 wrote to memory of 2880 4996 tuc4.tmp 90 PID 4996 wrote to memory of 1160 4996 tuc4.tmp 93 PID 4996 wrote to memory of 1160 4996 tuc4.tmp 93 PID 4996 wrote to memory of 1160 4996 tuc4.tmp 93 PID 4996 wrote to memory of 4752 4996 tuc4.tmp 96 PID 4996 wrote to memory of 4752 4996 tuc4.tmp 96 PID 4996 wrote to memory of 4752 4996 tuc4.tmp 96 PID 4996 wrote to memory of 2412 4996 tuc4.tmp 95 PID 4996 wrote to memory of 2412 4996 tuc4.tmp 95 PID 4996 wrote to memory of 2412 4996 tuc4.tmp 95 PID 4752 wrote to memory of 4476 4752 net.exe 97 PID 4752 wrote to memory of 4476 4752 net.exe 97 PID 4752 wrote to memory of 4476 4752 net.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\tuc4.exe"C:\Users\Admin\AppData\Local\Temp\tuc4.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:708 -
C:\Users\Admin\AppData\Local\Temp\is-DU59T.tmp\tuc4.tmp"C:\Users\Admin\AppData\Local\Temp\is-DU59T.tmp\tuc4.tmp" /SL5="$D005C,6971036,68096,C:\Users\Admin\AppData\Local\Temp\tuc4.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4996 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\system32\schtasks.exe" /Query3⤵PID:2880
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C:\Program Files (x86)\ConvertWMA\wmaconvert.exe"C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -i3⤵
- Executes dropped EXE
PID:1160
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C:\Program Files (x86)\ConvertWMA\wmaconvert.exe"C:\Program Files (x86)\ConvertWMA\wmaconvert.exe" -s3⤵
- Executes dropped EXE
PID:2412
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C:\Windows\SysWOW64\net.exe"C:\Windows\system32\net.exe" helpmsg 113⤵
- Suspicious use of WriteProcessMemory
PID:4752 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 helpmsg 114⤵PID:4476
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.8MB
MD59810b60c49cadedbd695bf93043e605d
SHA1a0854d5cabc61d346d4d5e63c69db0624e841f4e
SHA256f2db4b1f32427bac368e6107689ed91b415a6fb7704eefc0977cbbb083fca60c
SHA5122b98cac6609a3a708c43a596c836901b6133c7f187e36367cc58cd9e11f5874de113a9bd8a71d710d57f26a840cf52402b5bfa020c6d543c0171d14858695fe7
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Filesize
1.6MB
MD5b106c8f4dca680c17cd51f60c764c863
SHA19083cbad4e61f9e58712da82fc8c1b3a0f2404e1
SHA256ba08454ecf9f1169ba5515968df3a8344c69cf4bbc466f6bff2b4ac90945c692
SHA512971b872a1270c766767a2bdb3ede8eb7f65d03a5cf5d3046db87f335c3b738e61cac579bb35c37ef75ac04e722ddd89ffb96f34925d5fee9fc767486e29bef87
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Filesize
534KB
MD50db1e6394f3f21a539bf72510efd3f38
SHA154ac676a568d6a56e218cc07e188bff6a5120089
SHA256335c11e35ee5b30656813598af0092d0cec330b7d6ed38ae37373344d4b08e49
SHA512acb1e855ae246c11ce02f937186820d7238c79dc7f858b0d95bee72076e167730d36371f128567a776b34d57ca45937d2baf79fe3448da01dee8bab94f4b79dc
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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