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
-
max time kernel
1563s -
max time network
1565s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
-
submitted
10-04-2024 02:56
General
-
Target
a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647exe_JC.exe
-
Size
119KB
-
MD5
369204590ce91e77109e21a298753522
-
SHA1
e981f0c86c42e9e8fcbc7dcff0e05c35887a3869
-
SHA256
a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647
-
SHA512
bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32
-
SSDEEP
3072:P56Q4BB1q/hJcq4YZRKsySYSLLx9yLjj6TG6WVt9bm+EFyW43LORzMJS/3:Fha6BuQdwLKTGLt9bmhD4q1Mc
Malware Config
Signatures
-
Detect Gurcu Stealer V3 payload 5 IoCs
-
Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
-
Deletes itself 1 IoCs
-
Executes dropped EXE 2 IoCs
-
Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
-
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
-
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
-
Modifies system certificate store 2 TTPs 6 IoCs
-
Runs ping.exe 1 TTPs 1 IoCs
-
Suspicious behavior: EnumeratesProcesses 2 IoCs
-
Suspicious use of AdjustPrivilegeToken 3 IoCs
-
Suspicious use of WriteProcessMemory 24 IoCs
-
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.
-
outlook_office_path 1 IoCs
-
outlook_win_path 1 IoCs
Processes
-
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
-
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
-
C:\Windows\system32\chcp.comchcp 650013⤵
-
-
C:\Windows\system32\PING.EXEping 127.0.0.13⤵
- Runs ping.exe
-
-
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)
-
-
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
-
C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 2644 -s 30404⤵
-
-
-
-
C:\Windows\system32\taskeng.exetaskeng.exe {86AD4B84-A4EF-453C-A381-D362649B62D5} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
-
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
-
C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 816 -s 31123⤵
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
-
Filesize
344B
MD5f6061b7115528f7efe634ab44dfb7b36
SHA1f89a27f76732882e4320c801b910852ea4fa0795
SHA256a492c8bf9e2db3c462b4df4b55f3cf298a853a49874c6391bbd462ff126ec405
SHA5124d7b6e2e00aafb4f9c1c9386710f9fbb13861f75696965394b113a56972d04871389410ace19ac66705381f059b7f6852a40a0a25517f3de1575700f89d4659f
-
Filesize
344B
MD59e6e75470d7a6fc53284579d14d1544b
SHA188dfd2a2292578c9de52227b4803e82ade88417f
SHA256154ea7a38e58d08137edb0d3467ec9062e4cbc3f3f099357800c88d42d1c6e8c
SHA51278d99e32bc3f5ef19debbe60a1771ca00031b1eaab460897ddf9248ea0e025b1c5e38a89b5036604c34e9ac29897a6b97417bc4063eb30a5f3755b52afc962fc
-
Filesize
4B
MD5d5438e589313fc0036bbc291299c6fd4
SHA1e7c4cac8080a894585b44ab31fe825b678a5f312
SHA2568a1436e96efc3f62ee65687e4742d8bace0bad8d7f0b58c145f9c090b4635139
SHA512cf781928d716b674a7cb12feb6b87194b4733e5cea808a9d11c54791862d75ecc2406d01923acb598ed6a43eda249d89a26c173fd998e2e059139bd9e9591a80
-
Filesize
119KB
MD5369204590ce91e77109e21a298753522
SHA1e981f0c86c42e9e8fcbc7dcff0e05c35887a3869
SHA256a245b51ab711d20b944edca262659dba3a0ee6d1590c8f55a858ce82e2a1c647
SHA512bf4367a692eb1f4c31533ee1391cfc1708c75bf726dd5287ac0fa2e602664fa3a74458ded18c1831db16f0462b202f79b10d0f82f3bcb98423a460002e04cf32
-
Filesize
65KB
MD5ac05d27423a85adc1622c714f2cb6184
SHA1b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA256c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
SHA5126d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
-
Filesize
177KB
MD5435a9ac180383f9fa094131b173a2f7b
SHA176944ea657a9db94f9a4bef38f88c46ed4166983
SHA25667dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
SHA5121a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
-
Filesize
82B
MD51d2c0986ba3c3af924ad4b8776a45190
SHA1e4199810598c592fb4304eb37cf90d2ce2065a11
SHA2568f8cc850ea7e227ba100ad943c4c9000857e39d66a0aa6a245f599e6868d04c2
SHA512275f4de2999bc947be2a179aab2ed6e33d7591d3464d3ba43d3ca1b6fc0ada3aae2090f39dc3620bfcfa57824e26aba7b401145137f87115bbd4c3589a291524
-
Filesize
9.9MB
-
Filesize
9.9MB
-
Filesize
144KB
-
Filesize
9.9MB
-
Filesize
512KB
-
Filesize
512KB
-
Filesize
9.9MB
-
Filesize
9.9MB
-
Filesize
512KB
-
Filesize
9.9MB
-
Filesize
144KB