Resubmissions
10-04-2024 02:45
240410-c88xlscb89 1010-04-2024 02:45
240410-c88a3scb88 1010-04-2024 02:45
240410-c8631scb86 1010-04-2024 02:45
240410-c86ggscb85 1014-10-2023 02:07
231014-cj7cgsba81 10Analysis
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max time kernel
1562s -
max time network
1565s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
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submitted
10-04-2024 02:45
General
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Target
I63f8affb2294c837814c33f5446924ba.exe
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Size
89KB
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MD5
dfb3936eb972928af9ec106505364786
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SHA1
06a05bf8d2675ea58e44d3fdc0d9e610be021ca8
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SHA256
2d1765fd2323db0b7a1b2a4413f793bb6b3a544ed7ba19c1b0d9c4db80747a93
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SHA512
e71c24d1804792be45281e70e97d909817e18d0948dcaf86b3e49d22d9f085278b8d043613f1fee0468a28f9e10218ac2cce3315e4c1575f242b324f606e950f
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SSDEEP
1536:/JVNAuC4/P1xAqm9wRC+IWMVYJGOupb1cus6SQsjhp5cNbMQaZ9bqk4gxmsuZmQ+:fN//HAqm9wRC+IWMVYJGOubXsjL5wvsD
Malware Config
Signatures
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Detect Gurcu Stealer V3 payload 4 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 4 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\I63f8affb2294c837814c33f5446924ba.exe"C:\Users\Admin\AppData\Local\Temp\I63f8affb2294c837814c33f5446924ba.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 "I63f8affb2294c837814c33f5446924ba" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\I63f8affb2294c837814c33f5446924ba.exe" &&START "" "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.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 "I63f8affb2294c837814c33f5446924ba" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exe"C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.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 2544 -s 30964⤵
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C:\Windows\system32\taskeng.exetaskeng.exe {51F6EA9B-EAAF-42B9-B899-7E6E315DA6AA} S-1-5-21-406356229-2805545415-1236085040-1000:IKJSPGIM\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.exeC:\Users\Admin\AppData\Local\EsetSecurity\I63f8affb2294c837814c33f5446924ba.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 556 -s 31923⤵
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
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Filesize
344B
MD59950d334f3f57e6657790da307c30daf
SHA1f39233c1822e8986aab4b0231f522434dba2dc5d
SHA2565208a6e738da6519e34a049e11655d763223dd063b1c19bf14fec35aa3fd714a
SHA5127dce594bd5fd2c18f928d87e276c98a6c5ff77dc94b0b25eeb77e843297afb5dba39c641d020139c2f9b90805f037cce68f4a7668dd35a267067dd56634b3353
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Filesize
344B
MD514c356f20a848a73456bcdaf5c76a981
SHA16fbdae9b0fe68b3ae13389b91e89836a61d62b15
SHA2566d6a46a74e8307ead62246fafa97c71e1fbfe66fe7659ff197ca73381b67d15c
SHA51292e173aef660db926ec82ee05b260fb11c733f97a5b6aa4a7a72c57a92bb09ce56eb16b995f3ea26736bff97ab49c232bbbc25aefba933a9b4b6506013633d0e
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Filesize
89KB
MD5dfb3936eb972928af9ec106505364786
SHA106a05bf8d2675ea58e44d3fdc0d9e610be021ca8
SHA2562d1765fd2323db0b7a1b2a4413f793bb6b3a544ed7ba19c1b0d9c4db80747a93
SHA512e71c24d1804792be45281e70e97d909817e18d0948dcaf86b3e49d22d9f085278b8d043613f1fee0468a28f9e10218ac2cce3315e4c1575f242b324f606e950f
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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
4B
MD5b9009beb804fa097c04d226a8ba5102e
SHA18a7117d04ba0bb5c461a8ac3c6be0879b5f28c4a
SHA256604bdba4ae56af689c9c920d4b367e3c8935d567050efc6975cdbc098830af06
SHA512e34ec20bb4526c55434d4c4c74912228421f68df9799a3119600ab3ed5b0452a747e60e54376b4ca8b8b532fdb595255c5cb8ff0120f47e64f6255da08aba9e1
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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
112KB
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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
9.9MB
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Filesize
112KB
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Filesize
512KB
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Filesize
9.9MB