Malware Analysis Report

2025-06-15 20:56

Sample ID 240526-becrmsha8y
Target TBK_Mass_DM_1_1.exe
SHA256 721a4b64330caaa0a64de7a355c76add6f50a90ce6039fbb17a8db6ddfd8debc
Tags
pyinstaller
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

721a4b64330caaa0a64de7a355c76add6f50a90ce6039fbb17a8db6ddfd8debc

Threat Level: Shows suspicious behavior

The file TBK_Mass_DM_1_1.exe was found to be: Shows suspicious behavior.

Malicious Activity Summary

pyinstaller

Loads dropped DLL

Detects Pyinstaller

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Modifies registry class

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-26 01:03

Signatures

Detects Pyinstaller

pyinstaller
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-26 01:03

Reported

2024-05-26 01:23

Platform

win10v2004-20240426-en

Max time kernel

453s

Max time network

1179s

Command Line

"C:\Users\Admin\AppData\Local\Temp\TBK_Mass_DM_1_1.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\TBK_Mass_DM_1_1.exe

"C:\Users\Admin\AppData\Local\Temp\TBK_Mass_DM_1_1.exe"

C:\Users\Admin\AppData\Local\Temp\TBK_Mass_DM_1_1.exe

"C:\Users\Admin\AppData\Local\Temp\TBK_Mass_DM_1_1.exe"

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c mode con cols=77 lines=27

C:\Windows\system32\mode.com

mode con cols=77 lines=27

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
N/A 127.0.0.1:57308 tcp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 discordapp.com udp
US 162.159.129.233:443 discordapp.com tcp
US 8.8.8.8:53 233.129.159.162.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 11.179.89.13.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\_MEI36442\python38.dll

MD5 d2a8a5e7380d5f4716016777818a32c5
SHA1 fb12f31d1d0758fe3e056875461186056121ed0c
SHA256 59ab345c565304f638effa7c0236f26041fd06e35041a75988e13995cd28ace9
SHA512 ad1269d1367f587809e3fbe44af703c464a88fa3b2ae0bf2ad6544b8ed938e4265aab7e308d999e6c8297c0c85c608e3160796325286db3188a3edf040a02ab7

C:\Users\Admin\AppData\Local\Temp\_MEI36442\base_library.zip

MD5 802121028264cd071827a5ab62552092
SHA1 d622736c78fc64d6a1d3ca81572acacf06727cbc
SHA256 2f276b628f11077b78a78dd82df94eab300e68e562d3daa9a743458db0b3d047
SHA512 d4d77c2aa497aeef1e70dc82376e699b036c690c5ab78a2274ab5f943e1966109069c6b52b89586fb770387be88dcccc38e16df3dff1d94bfab5497e1f716ac7

C:\Users\Admin\AppData\Local\Temp\_MEI36442\VCRUNTIME140.dll

MD5 0e675d4a7a5b7ccd69013386793f68eb
SHA1 6e5821ddd8fea6681bda4448816f39984a33596b
SHA256 bf5ff4603557c9959acec995653d052d9054ad4826df967974efd2f377c723d1
SHA512 cae69a90f92936febde67dacd6ce77647cb3b3ed82bb66463cd9047e90723f633aa2fc365489de09fecdc510be15808c183b12e6236b0893af19633f6a670e66

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_ctypes.pyd

MD5 f1e33a8f6f91c2ed93dc5049dd50d7b8
SHA1 23c583dc98aa3f6b8b108db5d90e65d3dd72e9b4
SHA256 9459d246df7a3c638776305cf3683946ba8db26a7de90df8b60e1be0b27e53c4
SHA512 229896da389d78cbdf2168753ed7fcc72d8e0e62c6607a3766d6d47842c0abd519ac4f5d46607b15e7ba785280f9d27b482954e931645337a152b8a54467c6a5

C:\Users\Admin\AppData\Local\Temp\_MEI36442\select.pyd

MD5 6ae54d103866aad6f58e119d27552131
SHA1 bc53a92a7667fd922ce29e98dfcf5f08f798a3d2
SHA256 63b81af5d3576473c17ac929bea0add5bf8d7ea95c946caf66cbb9ad3f233a88
SHA512 ff23f3196a10892ea22b28ae929330c8b08ab64909937609b7af7bfb1623cd2f02a041fd9fab24e4bc1754276bdafd02d832c2f642c8ecdcb233f639bdf66dd0

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_socket.pyd

MD5 d6bae4b430f349ab42553dc738699f0e
SHA1 7e5efc958e189c117eccef39ec16ebf00e7645a9
SHA256 587c4f3092b5f3e34f6b1e927ecc7127b3fe2f7fa84e8a3d0c41828583bd5cef
SHA512 a8f8fed5ea88e8177e291b708e44b763d105907e9f8c9e046c4eebb8684a1778383d1fba6a5fa863ca37c42fd58ed977e9bb3a6b12c5b8d9ab6ef44de75e3d1e

C:\Users\Admin\AppData\Local\Temp\_MEI36442\libcrypto-1_1.dll

MD5 bf83f8ad60cb9db462ce62c73208a30d
SHA1 f1bc7dbc1e5b00426a51878719196d78981674c4
SHA256 012866b68f458ec204b9bce067af8f4a488860774e7e17973c49e583b52b828d
SHA512 ae1bdda1c174ddf4205ab19a25737fe523dca6a9a339030cd8a95674c243d0011121067c007be56def4eaeffc40cbdadfdcbd1e61df3404d6a3921d196dcd81e

C:\Users\Admin\AppData\Local\Temp\_MEI36442\libssl-1_1.dll

MD5 fe1f3632af98e7b7a2799e3973ba03cf
SHA1 353c7382e2de3ccdd2a4911e9e158e7c78648496
SHA256 1ce7ba99e817c1c2d71bc88a1bdd6fcad82aa5c3e519b91ebd56c96f22e3543b
SHA512 a0123dfe324d3ebf68a44afafca7c6f33d918716f29b063c72c4a8bd2006b81faea6848f4f2423778d57296d7bf4f99a3638fc87b37520f0dcbeefa3a2343de0

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_overlapped.pyd

MD5 1b04bd84bdd90b8419e2a658a1cacc6e
SHA1 c016487aa0455a8bb664f306fb4ad3e7e64811f2
SHA256 44f9ed9d97881b29ecc79a2b3077760a4f9f7b5ba386751c0f3b98f1bfb0d8c4
SHA512 24e86b3325d00484dd5da6198bd5e935fed0b31c4d1fba8d41340d39863e1e47c499899ca82bf477a007f6a636cf296702ece9b457a43a4aaec6b38569cfa2e3

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_bz2.pyd

MD5 3dc8af67e6ee06af9eec52fe985a7633
SHA1 1451b8c598348a0c0e50afc0ec91513c46fe3af6
SHA256 c55821f5fdb0064c796b2c0b03b51971f073140bc210cbe6ed90387db2bed929
SHA512 da16bfbc66c8abc078278d4d3ce1595a54c9ef43ae8837ceb35ae2f4757b930fe55e258827036eba8218315c10af5928e30cb22c60ff69159c8fe76327280087

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_lzma.pyd

MD5 37057c92f50391d0751f2c1d7ad25b02
SHA1 a43c6835b11621663fa251da421be58d143d2afb
SHA256 9442dc46829485670a6ac0c02ef83c54b401f1570d1d5d1d85c19c1587487764
SHA512 953dc856ad00c3aec6aeab3afa2deb24211b5b791c184598a2573b444761db2d4d770b8b807ebba00ee18725ff83157ec5fa2e3591a7756eb718eba282491c7c

C:\Users\Admin\AppData\Local\Temp\_MEI36442\unicodedata.pyd

MD5 4c0d43f1a31e76255cb592bb616683e7
SHA1 0a9f3d77a6e064baebacacc780701117f09169ad
SHA256 0f84e9f0d0bf44d10527a9816fcab495e3d797b09e7bbd1e6bd666ceb4b6c1a8
SHA512 b8176a180a441fe402e86f055aa5503356e7f49e984d70ab1060dee4f5f17fcec9c01f75bbff75ce5f4ef212677a6525804be53646cc0d7817b6ed5fd83fd778

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_hashlib.pyd

MD5 a6448bc5e5da21a222de164823add45c
SHA1 6c26eb949d7eb97d19e42559b2e3713d7629f2f9
SHA256 3692fc8e70e6e29910032240080fc8109248ce9a996f0a70d69acf1542fca69a
SHA512 a3833c7e1cf0e4d181ac4de95c5dfa685cf528dc39010bf0ac82864953106213eccff70785021ccb05395b5cf0dcb89404394327cd7e69f820d14dfa6fba8cba

C:\Users\Admin\AppData\Local\Temp\_MEI36442\multidict\_multidict.cp38-win_amd64.pyd

MD5 4d07e807a855be02a94c292dc66cb379
SHA1 2d8d742a1179627f1fd702430c3ee106b72988aa
SHA256 6ccb02ca328a9df23d5f5c7ce58fbf7b9f84474c801230c6c42eab171ed83744
SHA512 1576744a545abc7158525ec0e0e7930a7ed14016ce4d3ea157261e6be204a5e490937387718fe9b444f0d5ccfff866cd3426c1481ec31e293f59928d097895d1

C:\Users\Admin\AppData\Local\Temp\_MEI36442\yarl\_quoting_c.cp38-win_amd64.pyd

MD5 e96e99fc84249de9c4cd4649f3a27f7b
SHA1 4fcf885311d24a2ce438842bb7db269550709a00
SHA256 3730432069213e61d347d65be318c32a81dfebc56397de6a900c0b71f2aea303
SHA512 19aa039867085a5bba72308f514a614ba4703cc1299d6367b20d6ae7573f44a944f4ab46e3ea751e8a7bc63ebb97bf4fd32e60c480f31c4f9ff425725b690f79

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_asyncio.pyd

MD5 fe9322e00324b59c179d4c9803322b6c
SHA1 4d27aa7b1d38ee633de49256bb26a9ee47eb9ef1
SHA256 46967e4ef54e222dcda43b64032a3f22ed9fce4cebbe0e64288ed80f86a500eb
SHA512 29d65bd6e81325cb17ef105a2e4bf3b65c859389da1bd98036227b45bd4496c31aec6427df5fbd7dc9bec482b18d1481abcb7cbfe34dce7229b4a33b971219b8

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_ssl.pyd

MD5 8ee827f2fe931163f078acdc97107b64
SHA1 149bb536f3492bc59bd7071a3da7d1f974860641
SHA256 eaeefa6722c45e486f48a67ba18b4abb3ff0c29e5b30c23445c29a4d0b1cd3e4
SHA512 a6d24e72bf620ef695f08f5ffde70ef93f42a3fa60f7c76eb0f521393c595717e05ccb7a61ae216c18fe41e95fb238d82637714cf5208ee8f1dd32ae405b5565

C:\Users\Admin\AppData\Local\Temp\_MEI36442\libffi-7.dll

MD5 4424baf6ed5340df85482fa82b857b03
SHA1 181b641bf21c810a486f855864cd4b8967c24c44
SHA256 8c1f7f64579d01fedfde07e0906b1f8e607c34d5e6424c87abe431a2322eba79
SHA512 8adb94893ada555de2e82f006ab4d571fad8a1b16ac19ca4d2efc1065677f25d2de5c981473fabd0398f6328c1be1ebd4d36668ea67f8a5d25060f1980ee7e33

C:\Users\Admin\AppData\Local\Temp\_MEI36442\certifi\cacert.pem

MD5 3dcd08b803fbb28231e18b5d1eef4258
SHA1 b81ea40b943cd8a0c341f3a13e5bc05090b5a72a
SHA256 de2fa17c4d8ae68dc204a1b6b58b7a7a12569367cfeb8a3a4e1f377c73e83e9e
SHA512 9cc7106e921fbcf8c56745b38051a5a56154c600e3c553f2e64d93ec988c88b17f6d49698bdc18e3aa57ae96a79ee2c08c584c7c4c91cc6ea72db3dca6ccc2f5

C:\Users\Admin\AppData\Local\Temp\_MEI36442\_queue.pyd

MD5 44b72e0ad8d1e1ec3d8722088b48c3c5
SHA1 e0f41bf85978dd8f5abb0112c26322b72c0d7770
SHA256 4aa1bbde1621c49edab4376cf9a13c1aa00a9b0a9905d9640a2694ef92f77d5e
SHA512 05853f93c6d79d8f9c96519ce4c195b9204df1255b01329deaa65e29bd3e988d41454cd305e2199404f587e855737879c330638f2f07bff11388a49e67ba896c

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-26 01:03

Reported

2024-05-26 01:39

Platform

win10v2004-20240426-en

Max time kernel

457s

Max time network

1180s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\tbk.pyc

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A
Key created \REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\tbk.pyc

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 145.83.221.88.in-addr.arpa udp
BE 88.221.83.187:443 www.bing.com tcp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 187.83.221.88.in-addr.arpa udp
BE 88.221.83.187:443 www.bing.com tcp
US 8.8.8.8:53 138.201.86.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 52.111.229.48:443 tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 200.64.52.20.in-addr.arpa udp

Files

N/A