Analysis
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max time kernel
120s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
28-03-2024 14:52
Static task
static1
Behavioral task
behavioral1
Sample
KhT.scr
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
KhT.scr
Resource
win10v2004-20240226-en
General
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Target
KhT.scr
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Size
687KB
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MD5
62ed0ee9372f04bd637e3995624dbc0c
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SHA1
96e4d381325b9c0a0581993529baf0cb38050faf
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SHA256
17f1c3567b5334eca6e41e7a341faa999fdb22f64004a185874e23dd4a43d06d
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SHA512
7e3c79a487e8d472947aab1050db828ae7fe65ae1af049c00dfe7cd1b4668313665dd6380a32b7465a16da292e8270e53c35586ea39dcef3ec50ddc8a1bd2e1a
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SSDEEP
12288:4/K0YOwqOpWXqqfNg3Hsgtwmq+MzaMl7+fpfKIIP9HJYxbd:DO7rXHNg3HsgtwD+MzplCfxKzHJI
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.sigmamotorspk.com - Port:
587 - Username:
khiro@sigmamotorspk.com - Password:
zarbeazab1234 - Email To:
maungth@b-mech.com.sg
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
KhT.scrdescription pid process target process PID 2444 set thread context of 2472 2444 KhT.scr RegSvcs.exe -
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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Suspicious behavior: EnumeratesProcesses 11 IoCs
Processes:
KhT.scrRegSvcs.exepowershell.exepid process 2444 KhT.scr 2444 KhT.scr 2444 KhT.scr 2444 KhT.scr 2444 KhT.scr 2444 KhT.scr 2444 KhT.scr 2444 KhT.scr 2472 RegSvcs.exe 2472 RegSvcs.exe 2604 powershell.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
KhT.scrRegSvcs.exepowershell.exedescription pid process Token: SeDebugPrivilege 2444 KhT.scr Token: SeDebugPrivilege 2472 RegSvcs.exe Token: SeDebugPrivilege 2604 powershell.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
KhT.scrdescription pid process target process PID 2444 wrote to memory of 2604 2444 KhT.scr powershell.exe PID 2444 wrote to memory of 2604 2444 KhT.scr powershell.exe PID 2444 wrote to memory of 2604 2444 KhT.scr powershell.exe PID 2444 wrote to memory of 2604 2444 KhT.scr powershell.exe PID 2444 wrote to memory of 2648 2444 KhT.scr schtasks.exe PID 2444 wrote to memory of 2648 2444 KhT.scr schtasks.exe PID 2444 wrote to memory of 2648 2444 KhT.scr schtasks.exe PID 2444 wrote to memory of 2648 2444 KhT.scr schtasks.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe PID 2444 wrote to memory of 2472 2444 KhT.scr RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\KhT.scr"C:\Users\Admin\AppData\Local\Temp\KhT.scr" /S1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\zTmBkRpHGbA.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\zTmBkRpHGbA" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA6DA.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmpA6DA.tmpFilesize
1KB
MD5e8ca09d30c187811af2530147617c4d3
SHA11dd20e5fc754a8eebd38b749cc529d256b0605a3
SHA25619a4b734f6b20d24fd41e1ae0e1d86994aaddae661e789cdc38a6f6d4e9751f7
SHA5124644d82b0c695d61760a29deb1028ed4a71d809f0ecf4ef6e814c5668af55b6bfed6e94b786ab242700b332522f3d19a1c5876190d33e16b7e02121e23b20357
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memory/2444-0-0x0000000000FB0000-0x0000000001062000-memory.dmpFilesize
712KB
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memory/2444-1-0x0000000074640000-0x0000000074D2E000-memory.dmpFilesize
6.9MB
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memory/2444-2-0x0000000004980000-0x00000000049C0000-memory.dmpFilesize
256KB
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memory/2444-3-0x0000000000330000-0x000000000034A000-memory.dmpFilesize
104KB
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memory/2444-4-0x0000000000310000-0x000000000031C000-memory.dmpFilesize
48KB
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memory/2444-5-0x0000000004D80000-0x0000000004E02000-memory.dmpFilesize
520KB
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memory/2444-6-0x0000000074640000-0x0000000074D2E000-memory.dmpFilesize
6.9MB
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memory/2444-12-0x0000000004980000-0x00000000049C0000-memory.dmpFilesize
256KB
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memory/2444-28-0x0000000074640000-0x0000000074D2E000-memory.dmpFilesize
6.9MB
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memory/2472-20-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-15-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-17-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
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memory/2472-23-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-25-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-27-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-19-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/2472-36-0x0000000074640000-0x0000000074D2E000-memory.dmpFilesize
6.9MB
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memory/2472-33-0x0000000074640000-0x0000000074D2E000-memory.dmpFilesize
6.9MB
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memory/2472-31-0x00000000048F0000-0x0000000004930000-memory.dmpFilesize
256KB
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memory/2604-32-0x00000000027C0000-0x0000000002800000-memory.dmpFilesize
256KB
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memory/2604-30-0x000000006EBA0000-0x000000006F14B000-memory.dmpFilesize
5.7MB
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memory/2604-34-0x00000000027C0000-0x0000000002800000-memory.dmpFilesize
256KB
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memory/2604-35-0x000000006EBA0000-0x000000006F14B000-memory.dmpFilesize
5.7MB
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memory/2604-29-0x000000006EBA0000-0x000000006F14B000-memory.dmpFilesize
5.7MB