Analysis
- max time kernel
147s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20240730-en - resource tags
arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system - submitted
01/08/2024, 01:22
Static task
static1
Behavioral task
behavioral1
Sample
4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe
Resource
win10v2004-20240730-en
General
- Target 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe
- Size 986KB
- Sample240801-brj2gstfrm
- SHA256 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775
- MD5 d8eeed05506336c7f7613dca3d09de5b
- SHA1 82d8f3e13fc9623f9c40d468ca3509d2e6330a7e
- SHA512 8fd55b41cd6e9f867e732b4adca4fd5b7b94fd00c3db8b7e7617e00e58c541b06fa84d2856b5aec5a0712af1e57e9c79d739ad1b95824f8050fd6cfbeca4d648
- SSDEEP 24576:2PHKz9RDlXfkiioYRBYKTBy3cDwRWJJ0c3jdC:mKzE9RdTB9+9czd
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
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remcos
-
RemoteHost
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eadzagba1.duckdns.org:4877
-
audio_folder
MicRecords
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audio_record_time
5
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connect_delay
0
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connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Remcos
-
delete_file
false
-
hide_file
false
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hide_keylog_file
false
-
install_flag
true
-
keylog_crypt
false
-
keylog_file
logs.dat
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keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-3DF634
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 1360 powershell.exe 2812 powershell.exe - Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2721909339-1374969515-2476821579-1000\Control Panel\International\Geo\Nation 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe Key value queried \REGISTRY\USER\S-1-5-21-2721909339-1374969515-2476821579-1000\Control Panel\International\Geo\Nation remcos.exe Key value queried \REGISTRY\USER\S-1-5-21-2721909339-1374969515-2476821579-1000\Control Panel\International\Geo\Nation 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe - Executes dropped EXE 2 IoCs
pid Process 3416 remcos.exe 556 remcos.exe - Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2721909339-1374969515-2476821579-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Set value (str) \REGISTRY\USER\S-1-5-21-2721909339-1374969515-2476821579-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 5108 set thread context of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 3416 set thread context of 556 3416 remcos.exe 96 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 8 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe - Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2544 schtasks.exe 1704 schtasks.exe - Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1360 powershell.exe 1360 powershell.exe 2812 powershell.exe 2812 powershell.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1360 powershell.exe Token: SeDebugPrivilege 2812 powershell.exe - Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 5108 wrote to memory of 1360 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 86 PID 5108 wrote to memory of 1360 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 86 PID 5108 wrote to memory of 1360 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 86 PID 5108 wrote to memory of 1704 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 88 PID 5108 wrote to memory of 1704 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 88 PID 5108 wrote to memory of 1704 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 88 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 5108 wrote to memory of 1992 5108 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 90 PID 1992 wrote to memory of 3416 1992 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 91 PID 1992 wrote to memory of 3416 1992 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 91 PID 1992 wrote to memory of 3416 1992 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe 91 PID 3416 wrote to memory of 2812 3416 remcos.exe 92 PID 3416 wrote to memory of 2812 3416 remcos.exe 92 PID 3416 wrote to memory of 2812 3416 remcos.exe 92 PID 3416 wrote to memory of 2544 3416 remcos.exe 94 PID 3416 wrote to memory of 2544 3416 remcos.exe 94 PID 3416 wrote to memory of 2544 3416 remcos.exe 94 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96 PID 3416 wrote to memory of 556 3416 remcos.exe 96
Processes
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C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe"C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5108 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yTDUjUzWijyB.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1360
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yTDUjUzWijyB" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDE3A.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1704
-
-
C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe"C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1992 -
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3416 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yTDUjUzWijyB.exe"4⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2812
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yTDUjUzWijyB" /XML "C:\Users\Admin\AppData\Local\Temp\tmp11ED.tmp"4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2544
-
-
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:556
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Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
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Downloads
- Path C:\ProgramData\Remcos\remcos.exe
- Size 986KB
- SHA256 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775
- MD5 d8eeed05506336c7f7613dca3d09de5b
- SHA1 82d8f3e13fc9623f9c40d468ca3509d2e6330a7e
- SHA512 8fd55b41cd6e9f867e732b4adca4fd5b7b94fd00c3db8b7e7617e00e58c541b06fa84d2856b5aec5a0712af1e57e9c79d739ad1b95824f8050fd6cfbeca4d648
- SSDEEP 24576:2PHKz9RDlXfkiioYRBYKTBy3cDwRWJJ0c3jdC:mKzE9RdTB9+9czd
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
- Size 2KB
- SHA256 6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69
- MD5 3d086a433708053f9bf9523e1d87a4e8
- SHA1 b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28
- SHA512 931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
- Size 18KB
- SHA256 786e65bb4b34c9541f0ee1fbc26c4e4210df651e377977dcfb3b3ccce4ebdccb
- MD5 b992e5654280d890c89c807e6a387dbb
- SHA1 b698335d3d54a841bd9637c81c000b731120a4d7
- SHA512 3be1ea1b2e58a01cdcc1fff133d037519edd4ee21630610faaab3c8fda5eb7bba0a913edf1b99a8fbf2fcaf7917c915e92ae54105b6d50ea6f42ddb3668b4fe9
- SSDEEP 384:46+BC9i+4LH53BizJk8ho9ojZTnK6seYLME/h03SoZ2fYSv0jEDked0gdItkKhD:5sTJoehojZTnNgrKSJ5KEDyCq3
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nj5nipjf.umt.ps1
- Size 60B
- SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
- MD5 d17fe0a3f47be24a6453e9ef58c94641
- SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
- SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Temp\tmpDE3A.tmp
- Size 1KB
- SHA256 8b82c53cfeb4e0fda984f4a19653e6bb9aac34a6fa5a08f944489f0198ec7ebe
- MD5 66c13a182ec1abc966b2aea424d24c27
- SHA1 519bbbc39e4fcfd04b22cc9ecc1021c358e4d0fd
- SHA512 08588a1f7ace9e408d27db5ce1c31b3e0479b264c26d326c6c8cb0748bcaf14ec98a50ffc423d2c90745f6066dcec9c776f9bcfb0d42d17e29da62a7f2c08494
- MD5 SHA1 SHA512