Resubmissions
10/04/2024, 02:56
240410-dff7kacd24 1010/04/2024, 02:56
240410-de3zyacc96 1010/04/2024, 02:56
240410-de3deaff6t 1010/04/2024, 02:56
240410-de23msff6s 1009/09/2023, 14:35
230909-rx47lsbh52 10Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
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submitted
10/04/2024, 02:56
General
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Target
a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe
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Size
119KB
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MD5
369204590ce91e77109e21a298753522
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SHA1
e981f0c86c42e9e8fcbc7dcff0e05c35887a3869
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SHA256
a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647
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SHA512
bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32
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SSDEEP
3072:P56Q4BB1q/hJcq4YZRKsySYSLLx9yLjj6TG6WVt9bm+EFyW43LORzMJS/3:Fha6BuQdwLKTGLt9bmhD4q1Mc
Malware Config
Signatures
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Detect Gurcu Stealer V3 payload 5 IoCs
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Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
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Deletes itself 1 IoCs
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Executes dropped EXE 2 IoCs
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Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies system certificate store 2 TTPs 6 IoCs
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Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious use of AdjustPrivilegeToken 3 IoCs
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Suspicious use of WriteProcessMemory 24 IoCs
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Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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outlook_office_path 1 IoCs
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outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe"C:\Users\Admin\AppData\Local\Temp\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe" &&START "" "C:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe"2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\chcp.comchcp 650013⤵
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C:\Windows\system32\PING.EXEping 127.0.0.13⤵
- Runs ping.exe
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C:\Windows\system32\schtasks.exeschtasks /create /tn "a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe"C:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 2656 -s 30964⤵
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C:\Windows\system32\taskeng.exetaskeng.exe {A97C4EA3-9F49-4DF0-AD59-FED537FA0B32} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exeC:\Users\Admin\AppData\Local\EsetSecurity\a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe2⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 828 -s 31363⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
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Filesize
344B
MD5cac98ebd87f42c5387fe6ffe1a67a2ca
SHA1eb2b1d98114e44fb90691868912e7b9e7450a769
SHA256e97878c93af46363243a70c88c251b36256bf058210b3a440f30be66e2622869
SHA512315570999234449f6c16653bdf8356bf94c3b880409bffe9c7a0c851dea613b96b3d418f48993609de7cd591a773e135707a0893604e1c5bee8e912073348a2c
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Filesize
344B
MD52d48a228168e8eca80d7126e2db7a7bc
SHA1998c51e0d4e3d3a784c9cc325a1679a67998f878
SHA2567308e9ab4300cb564bf4cfd239adee0746738f98c6a82cc294e1f2db97e4a099
SHA5122f613dd8073c88f032dbaac7b04d3f2cf3c14d23a584191dce3ac7f33960e1c1e9b17444e22bea019389da65c3eb5edc4cf687f92924eaa05260ae3bcf251436
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Filesize
4B
MD53f1656d9668dffcf8119e3ecff873558
SHA118e25c1d6c53fda1695ce0edbe739497fec0af11
SHA256e28ccaa8e211ca16570da5aac83c3014f5c6398649eed7f6f4adbece5be66af6
SHA5127a7c9b106dc8c0e4933632da2dfc8940dc5ef15e422374c452d5d24710098eabb8cfb236e1dd2b294d548663c983d974638b03f6ffbd9785ab85da9f68964c31
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Filesize
119KB
MD5369204590ce91e77109e21a298753522
SHA1e981f0c86c42e9e8fcbc7dcff0e05c35887a3869
SHA256a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647
SHA512bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32
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Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
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Filesize
177KB
MD5435a9ac180383f9fa094131b173a2f7b
SHA176944ea657a9db94f9a4bef38f88c46ed4166983
SHA25667dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
SHA5121a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
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Filesize
82B
MD51d2c0986ba3c3af924ad4b8776a45190
SHA1e4199810598c592fb4304eb37cf90d2ce2065a11
SHA2568f8cc850ea7e227ba100ad943c4c9000857e39d66a0aa6a245f599e6868d04c2
SHA512275f4de2999bc947be2a179aab2ed6e33d7591d3464d3ba43d3ca1b6fc0ada3aae2090f39dc3620bfcfa57824e26aba7b401145137f87115bbd4c3589a291524
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Filesize
512KB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
512KB
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Filesize
9.9MB
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Filesize
144KB
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Filesize
512KB
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Filesize
9.9MB
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Filesize
512KB
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Filesize
9.9MB
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Filesize
144KB
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Filesize
512KB
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Filesize
9.9MB