Analysis
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max time kernel
143s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28-03-2024 14:04
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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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
KhT.scrdescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation KhT.scr -
Suspicious use of SetThreadContext 1 IoCs
Processes:
KhT.scrdescription pid process target process PID 4840 set thread context of 4816 4840 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 15 IoCs
Processes:
KhT.scrpowershell.exeRegSvcs.exepid process 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 4840 KhT.scr 3424 powershell.exe 3424 powershell.exe 4816 RegSvcs.exe 4816 RegSvcs.exe 4816 RegSvcs.exe 3424 powershell.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
KhT.scrpowershell.exeRegSvcs.exedescription pid process Token: SeDebugPrivilege 4840 KhT.scr Token: SeDebugPrivilege 3424 powershell.exe Token: SeDebugPrivilege 4816 RegSvcs.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
KhT.scrdescription pid process target process PID 4840 wrote to memory of 3424 4840 KhT.scr powershell.exe PID 4840 wrote to memory of 3424 4840 KhT.scr powershell.exe PID 4840 wrote to memory of 3424 4840 KhT.scr powershell.exe PID 4840 wrote to memory of 4644 4840 KhT.scr schtasks.exe PID 4840 wrote to memory of 4644 4840 KhT.scr schtasks.exe PID 4840 wrote to memory of 4644 4840 KhT.scr schtasks.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 KhT.scr RegSvcs.exe PID 4840 wrote to memory of 4816 4840 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⤵
- Checks computer location settings
- 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\tmp6695.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
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4krtc5ml.d5g.ps1Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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C:\Users\Admin\AppData\Local\Temp\tmp6695.tmpFilesize
1KB
MD570bd428a84f1328b8fff63a823c0fcc7
SHA1cb52b608d0fd6544a2729cb79a25f44fb8dad1d5
SHA25693f07bd290db71695669d1b29eb5478001c17c2a2bc277f26c1ca66153a39b79
SHA512ebe558f33f85b943065bf27fad5a894c302f10410d5ff623343c82c06dd9f57a186941c8b2732c9875906c64c83f06c6dba9134a0ccfe5014917cab28cf2cb0d
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memory/3424-55-0x0000000007AD0000-0x0000000007B73000-memory.dmpFilesize
652KB
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memory/3424-59-0x0000000007C70000-0x0000000007C7A000-memory.dmpFilesize
40KB
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memory/3424-38-0x00000000063D0000-0x0000000006724000-memory.dmpFilesize
3.3MB
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memory/3424-68-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/3424-65-0x0000000007F20000-0x0000000007F28000-memory.dmpFilesize
32KB
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memory/3424-64-0x0000000007F40000-0x0000000007F5A000-memory.dmpFilesize
104KB
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memory/3424-63-0x0000000007E40000-0x0000000007E54000-memory.dmpFilesize
80KB
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memory/3424-62-0x0000000007E30000-0x0000000007E3E000-memory.dmpFilesize
56KB
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memory/3424-61-0x0000000007E00000-0x0000000007E11000-memory.dmpFilesize
68KB
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memory/3424-60-0x0000000007E80000-0x0000000007F16000-memory.dmpFilesize
600KB
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memory/3424-16-0x0000000002F50000-0x0000000002F86000-memory.dmpFilesize
216KB
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memory/3424-17-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/3424-18-0x0000000002F00000-0x0000000002F10000-memory.dmpFilesize
64KB
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memory/3424-40-0x0000000006930000-0x000000000697C000-memory.dmpFilesize
304KB
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memory/3424-21-0x0000000005A30000-0x0000000006058000-memory.dmpFilesize
6.2MB
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memory/3424-57-0x0000000007C00000-0x0000000007C1A000-memory.dmpFilesize
104KB
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memory/3424-56-0x0000000008240000-0x00000000088BA000-memory.dmpFilesize
6.5MB
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memory/3424-39-0x0000000006900000-0x000000000691E000-memory.dmpFilesize
120KB
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memory/3424-54-0x0000000006EB0000-0x0000000006ECE000-memory.dmpFilesize
120KB
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memory/3424-43-0x0000000006ED0000-0x0000000006F02000-memory.dmpFilesize
200KB
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memory/3424-27-0x0000000005990000-0x00000000059B2000-memory.dmpFilesize
136KB
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memory/3424-28-0x0000000006190000-0x00000000061F6000-memory.dmpFilesize
408KB
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memory/3424-44-0x0000000070450000-0x000000007049C000-memory.dmpFilesize
304KB
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memory/3424-42-0x000000007F040000-0x000000007F050000-memory.dmpFilesize
64KB
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memory/3424-41-0x0000000002F00000-0x0000000002F10000-memory.dmpFilesize
64KB
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memory/4816-69-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/4816-58-0x0000000006070000-0x00000000060C0000-memory.dmpFilesize
320KB
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memory/4816-70-0x0000000004FC0000-0x0000000004FD0000-memory.dmpFilesize
64KB
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memory/4816-23-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/4816-26-0x0000000005170000-0x00000000051D6000-memory.dmpFilesize
408KB
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memory/4816-25-0x0000000004FC0000-0x0000000004FD0000-memory.dmpFilesize
64KB
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memory/4816-20-0x0000000000400000-0x0000000000440000-memory.dmpFilesize
256KB
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memory/4840-24-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/4840-0-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/4840-5-0x0000000005230000-0x000000000523A000-memory.dmpFilesize
40KB
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memory/4840-2-0x0000000005650000-0x0000000005BF4000-memory.dmpFilesize
5.6MB
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memory/4840-14-0x0000000005270000-0x0000000005280000-memory.dmpFilesize
64KB
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memory/4840-10-0x00000000747D0000-0x0000000074F80000-memory.dmpFilesize
7.7MB
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memory/4840-9-0x0000000009070000-0x000000000910C000-memory.dmpFilesize
624KB
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memory/4840-8-0x0000000006A00000-0x0000000006A82000-memory.dmpFilesize
520KB
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memory/4840-7-0x0000000006580000-0x000000000658C000-memory.dmpFilesize
48KB
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memory/4840-6-0x0000000006690000-0x00000000066AA000-memory.dmpFilesize
104KB
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memory/4840-1-0x00000000005F0000-0x00000000006A2000-memory.dmpFilesize
712KB
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memory/4840-4-0x0000000005270000-0x0000000005280000-memory.dmpFilesize
64KB
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memory/4840-3-0x00000000050A0000-0x0000000005132000-memory.dmpFilesize
584KB