Analysis
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max time kernel
149s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
23-05-2024 12:15
Static task
static1
Behavioral task
behavioral1
Sample
#Inv_PI_{number_12}_pdf.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
#Inv_PI_{number_12}_pdf.exe
Resource
win10v2004-20240508-en
General
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Target
#Inv_PI_{number_12}_pdf.exe
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Size
1.1MB
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MD5
96a62642b79fcb88da4f854b2c46c64c
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SHA1
1778d5bad1acb999458092745af2a6ac3fce39a3
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SHA256
472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1
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SHA512
4643ede4706e904a6b6efd4c59d29c5a58c3aa3614de1d4d17e02d8ad33c4ecfd2bfe61de335e726c8ec085717afef77e9146eab4f71fd8a25758a2f3612d457
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SSDEEP
24576:+8lmSlcXrLArMThOTAiVOpoUJ3jEDFXF9bo:9mSubfQrVS1xjcFDo
Malware Config
Extracted
remcos
RemoteHost
45.95.169.137:2404
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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
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copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
true
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install_path
%AppData%
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-NG20QI
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule behavioral2/memory/908-129-0x0000000000400000-0x0000000000462000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 1 IoCs
Password recovery tool for various web browsers
Processes:
resource yara_rule behavioral2/memory/2080-128-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView -
Nirsoft 3 IoCs
Processes:
resource yara_rule behavioral2/memory/400-133-0x0000000000400000-0x0000000000424000-memory.dmp Nirsoft behavioral2/memory/908-129-0x0000000000400000-0x0000000000462000-memory.dmp Nirsoft behavioral2/memory/2080-128-0x0000000000400000-0x0000000000478000-memory.dmp Nirsoft -
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.
Processes:
powershell.exepowershell.exepid process 1216 powershell.exe 3960 powershell.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
#Inv_PI_{number_12}_pdf.exe#Inv_PI_{number_12}_pdf.exeremcos.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation #Inv_PI_{number_12}_pdf.exe Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation #Inv_PI_{number_12}_pdf.exe Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation remcos.exe -
Executes dropped EXE 6 IoCs
Processes:
remcos.exeremcos.exeremcos.exeremcos.exeremcos.exeremcos.exepid process 4008 remcos.exe 3332 remcos.exe 3356 remcos.exe 2080 remcos.exe 908 remcos.exe 400 remcos.exe -
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 accounts 1 TTPs 1 IoCs
Processes:
remcos.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts remcos.exe -
Adds Run key to start application 2 TTPs 4 IoCs
Processes:
#Inv_PI_{number_12}_pdf.exeremcos.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-NG20QI = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\"" #Inv_PI_{number_12}_pdf.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NG20QI = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\"" #Inv_PI_{number_12}_pdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-NG20QI = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\"" remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NG20QI = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\"" remcos.exe -
Suspicious use of SetThreadContext 5 IoCs
Processes:
#Inv_PI_{number_12}_pdf.exeremcos.exeremcos.exedescription pid process target process PID 2960 set thread context of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 4008 set thread context of 3332 4008 remcos.exe remcos.exe PID 3332 set thread context of 2080 3332 remcos.exe remcos.exe PID 3332 set thread context of 908 3332 remcos.exe remcos.exe PID 3332 set thread context of 400 3332 remcos.exe remcos.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 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 440 schtasks.exe 1200 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
Processes:
#Inv_PI_{number_12}_pdf.exepowershell.exeremcos.exepowershell.exeremcos.exeremcos.exepid process 2960 #Inv_PI_{number_12}_pdf.exe 2960 #Inv_PI_{number_12}_pdf.exe 3960 powershell.exe 3960 powershell.exe 4008 remcos.exe 4008 remcos.exe 4008 remcos.exe 4008 remcos.exe 1216 powershell.exe 1216 powershell.exe 2080 remcos.exe 2080 remcos.exe 400 remcos.exe 400 remcos.exe 2080 remcos.exe 2080 remcos.exe -
Suspicious behavior: MapViewOfSection 3 IoCs
Processes:
remcos.exepid process 3332 remcos.exe 3332 remcos.exe 3332 remcos.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
#Inv_PI_{number_12}_pdf.exepowershell.exeremcos.exepowershell.exeremcos.exedescription pid process Token: SeDebugPrivilege 2960 #Inv_PI_{number_12}_pdf.exe Token: SeDebugPrivilege 3960 powershell.exe Token: SeDebugPrivilege 4008 remcos.exe Token: SeDebugPrivilege 1216 powershell.exe Token: SeDebugPrivilege 400 remcos.exe -
Suspicious use of WriteProcessMemory 54 IoCs
Processes:
#Inv_PI_{number_12}_pdf.exe#Inv_PI_{number_12}_pdf.exeremcos.exeremcos.exedescription pid process target process PID 2960 wrote to memory of 3960 2960 #Inv_PI_{number_12}_pdf.exe powershell.exe PID 2960 wrote to memory of 3960 2960 #Inv_PI_{number_12}_pdf.exe powershell.exe PID 2960 wrote to memory of 3960 2960 #Inv_PI_{number_12}_pdf.exe powershell.exe PID 2960 wrote to memory of 440 2960 #Inv_PI_{number_12}_pdf.exe schtasks.exe PID 2960 wrote to memory of 440 2960 #Inv_PI_{number_12}_pdf.exe schtasks.exe PID 2960 wrote to memory of 440 2960 #Inv_PI_{number_12}_pdf.exe schtasks.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 2960 wrote to memory of 1272 2960 #Inv_PI_{number_12}_pdf.exe #Inv_PI_{number_12}_pdf.exe PID 1272 wrote to memory of 4008 1272 #Inv_PI_{number_12}_pdf.exe remcos.exe PID 1272 wrote to memory of 4008 1272 #Inv_PI_{number_12}_pdf.exe remcos.exe PID 1272 wrote to memory of 4008 1272 #Inv_PI_{number_12}_pdf.exe remcos.exe PID 4008 wrote to memory of 1216 4008 remcos.exe powershell.exe PID 4008 wrote to memory of 1216 4008 remcos.exe powershell.exe PID 4008 wrote to memory of 1216 4008 remcos.exe powershell.exe PID 4008 wrote to memory of 1200 4008 remcos.exe schtasks.exe PID 4008 wrote to memory of 1200 4008 remcos.exe schtasks.exe PID 4008 wrote to memory of 1200 4008 remcos.exe schtasks.exe PID 4008 wrote to memory of 3356 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3356 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3356 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 4008 wrote to memory of 3332 4008 remcos.exe remcos.exe PID 3332 wrote to memory of 2080 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 2080 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 2080 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 2080 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 908 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 908 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 908 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 908 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 400 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 400 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 400 3332 remcos.exe remcos.exe PID 3332 wrote to memory of 400 3332 remcos.exe remcos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe"C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2960 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GxGUIRTmI.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3960
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxGUIRTmI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8220.tmp"2⤵
- Creates scheduled task(s)
PID:440
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C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe"C:\Users\Admin\AppData\Local\Temp\#Inv_PI_{number_12}_pdf.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1272 -
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4008 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GxGUIRTmI.exe"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1216
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxGUIRTmI" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAF0C.tmp"4⤵
- Creates scheduled task(s)
PID:1200
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C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"4⤵
- Executes dropped EXE
PID:3356
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C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3332 -
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exeC:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\yxfljrlkuesnbrkmtlawx"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2080
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C:\Users\Admin\AppData\Roaming\Remcos\remcos.exeC:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\jrkeckwdimksmfgqcvnqiqdm"5⤵
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
PID:908
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C:\Users\Admin\AppData\Roaming\Remcos\remcos.exeC:\Users\Admin\AppData\Roaming\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\ltxpdcgfwucfoluutgzrldyvkfh"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:400
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2KB
MD53d086a433708053f9bf9523e1d87a4e8
SHA1b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28
SHA2566f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69
SHA512931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd
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Filesize
18KB
MD558084ec6d29738af282ccd8169d1ac1b
SHA178f7351b1c436be3c8684c5da1d94235a731ebcd
SHA2562111f0a3df21564e4a5ccc2d91310096d29e551a5e6d629a024b05997c5faf84
SHA5126933f369b95c567596e540097ab00f782380b27e305a29b84b434953c802aa03c12d204de9f1d8e7b13e05e69ec4e0cd2ecc1a82b4ecea9e0fcbeddb61608484
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
1KB
MD585889ea88f226ee3dacaea96f2d2761d
SHA1bb64832952528d92b4f31314581a664d47bccb13
SHA256be728d9e5b61dfd91a00bc3f862c9bc72caeef0750ae9626dbfb7bfb6e0a8d91
SHA51289e6cfdc888089e0fcde32b6e8aeb80d9747a3134db3e430d398875cc83e34bc323fd3927ec307851cefd2abf79a8f4ae2584948c23207f799974b579465bc18
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Filesize
4KB
MD573ddf6cd83c2ad8a2fbb2383e322ffbc
SHA105270f8bb7b5cc6ab9a61ae7453d047379089147
SHA2560ef9194c6e90b23c416316fc5a15f549ee5b2472014fcd7648d72ca9a865b409
SHA512714db1956faa795005b15324b9604105881d6b484fe899876fe0df85783c61a72f556a875833af8625625212503b95eea2eb353a1d98f6a7af47a3658ea5262d
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Filesize
1.1MB
MD596a62642b79fcb88da4f854b2c46c64c
SHA11778d5bad1acb999458092745af2a6ac3fce39a3
SHA256472a8fbff35cdda49a870d372fa6da50defd8480348438e245f11aad954642d1
SHA5124643ede4706e904a6b6efd4c59d29c5a58c3aa3614de1d4d17e02d8ad33c4ecfd2bfe61de335e726c8ec085717afef77e9146eab4f71fd8a25758a2f3612d457