Analysis
- max time kernel
156s - max time network
130s - platform
windows7_x64 - resource
win7-20240221-en - resource tags
- submitted
13/03/2024, 00:41
General
- Target 59206d63b916e688224ac1152c0c1432668d9dd17cd47911d9a05099cb7d3fbe.exe
- Size 2.0MB
- Sample240313-a17cpshe84
- SHA256 59206d63b916e688224ac1152c0c1432668d9dd17cd47911d9a05099cb7d3fbe
Malware Config
Extracted
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stealc
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http://185.172.128.145
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url_path
/3cd2b41cbde8fc9c.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 8 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- UPX packed file 4 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 43 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\59206d63b916e688224ac1152c0c1432668d9dd17cd47911d9a05099cb7d3fbe.exe"C:\Users\Admin\AppData\Local\Temp\59206d63b916e688224ac1152c0c1432668d9dd17cd47911d9a05099cb7d3fbe.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\syncUpd.exeC:\Users\Admin\AppData\Local\Temp\syncUpd.exe2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\HJECAAKKFH.exe"3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\HJECAAKKFH.exe"C:\Users\Admin\AppData\Local\Temp\HJECAAKKFH.exe"4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\HJECAAKKFH.exe5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30006⤵
- Runs ping.exe
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\AAAAAAAAAA.exe"3⤵
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C:\Users\Admin\AppData\Local\Temp\BroomSetup.exeC:\Users\Admin\AppData\Local\Temp\BroomSetup.exe2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\chcp.comchcp 12514⤵
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F4⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
HJECAAKKFH.exe
Task.bat
mozglue.dll
nss3.dll
BroomSetup.exe
INetC.dll
syncUpd.exe
memory/2120-165-0x0000000004CA0000-0x0000000004CE0000-memory.dmp
memory/2120-174-0x0000000004CA0000-0x0000000004CE0000-memory.dmp
memory/2120-173-0x00000000719E0000-0x00000000720CE000-memory.dmp
memory/2120-156-0x00000000719E0000-0x00000000720CE000-memory.dmp
memory/2120-138-0x0000000001050000-0x000000000106E000-memory.dmp
memory/2172-27-0x0000000000400000-0x000000000043D000-memory.dmp
memory/2172-28-0x0000000004E90000-0x00000000053C0000-memory.dmp
memory/2456-170-0x0000000000400000-0x0000000000930000-memory.dmp
memory/2456-31-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/2456-30-0x0000000000400000-0x0000000000930000-memory.dmp
memory/2456-77-0x0000000000400000-0x0000000000930000-memory.dmp
memory/2456-86-0x00000000001D0000-0x00000000001D1000-memory.dmp
memory/2704-34-0x0000000000220000-0x0000000000247000-memory.dmp
memory/2704-94-0x0000000000220000-0x0000000000247000-memory.dmp
memory/2704-111-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2704-114-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2704-122-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2704-93-0x0000000000720000-0x0000000000820000-memory.dmp
memory/2704-125-0x0000000000720000-0x0000000000820000-memory.dmp
memory/2704-110-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2704-84-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2704-33-0x0000000000720000-0x0000000000820000-memory.dmp
memory/2704-76-0x0000000000400000-0x000000000063B000-memory.dmp
memory/2704-36-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2704-35-0x0000000000400000-0x000000000063B000-memory.dmp
memory/3044-160-0x0000000002240000-0x0000000002241000-memory.dmp