Analysis
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max time kernel
148s -
max time network
151s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
06-03-2023 09:56
Static task
static1
Behavioral task
behavioral1
Sample
OUR REF NO. S03593.pdf.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
OUR REF NO. S03593.pdf.exe
Resource
win10v2004-20230220-en
General
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Target
OUR REF NO. S03593.pdf.exe
-
Size
1.0MB
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MD5
6ffcaa9d57ed36d74cac808ffc5fc9b6
-
SHA1
89c88ac7b1420300e2f63b5a7f863c7f672ba959
-
SHA256
f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
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SHA512
49f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
-
SSDEEP
24576:y/OFMbQyXyXhZVTR0z71BM2TRkB6huiR3BSpNoVf0LTsIBMNjnNNOhAe/S0:dHyXyXQHFTRkB6hulb80
Malware Config
Extracted
remcos
XP
xpremcuz300622.ddns.net:3542
-
audio_folder
MicRecords
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audio_record_time
5
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connect_delay
0
-
connect_interval
1
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copy_file
oos.exe
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delete_file
false
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hide_file
true
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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
-
mutex
Remcos-MMP2I7
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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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startup_value
kkl
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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Executes dropped EXE 3 IoCs
Processes:
oos.exeoos.exeoos.exepid process 1808 oos.exe 1412 oos.exe 696 oos.exe -
Loads dropped DLL 1 IoCs
Processes:
cmd.exepid process 1396 cmd.exe -
Adds Run key to start application 2 TTPs 8 IoCs
Processes:
OUR REF NO. S03593.pdf.exeoos.exedescription ioc process Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ OUR REF NO. S03593.pdf.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" OUR REF NO. S03593.pdf.exe Key created \REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\ oos.exe Set value (str) \REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" oos.exe Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ oos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" oos.exe Key created \REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\ OUR REF NO. S03593.pdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" OUR REF NO. S03593.pdf.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
OUR REF NO. S03593.pdf.exeoos.exedescription pid process target process PID 960 set thread context of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 1808 set thread context of 696 1808 oos.exe oos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
oos.exepid process 1808 oos.exe -
Suspicious use of AdjustPrivilegeToken 11 IoCs
Processes:
OUR REF NO. S03593.pdf.exeoos.exedescription pid process Token: SeBackupPrivilege 960 OUR REF NO. S03593.pdf.exe Token: SeSecurityPrivilege 960 OUR REF NO. S03593.pdf.exe Token: SeSecurityPrivilege 960 OUR REF NO. S03593.pdf.exe Token: SeBackupPrivilege 960 OUR REF NO. S03593.pdf.exe Token: SeSecurityPrivilege 960 OUR REF NO. S03593.pdf.exe Token: SeBackupPrivilege 1808 oos.exe Token: SeSecurityPrivilege 1808 oos.exe Token: SeSecurityPrivilege 1808 oos.exe Token: SeBackupPrivilege 1808 oos.exe Token: SeSecurityPrivilege 1808 oos.exe Token: SeDebugPrivilege 1808 oos.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
oos.exepid process 696 oos.exe -
Suspicious use of WriteProcessMemory 42 IoCs
Processes:
OUR REF NO. S03593.pdf.exeOUR REF NO. S03593.pdf.exeWScript.execmd.exeoos.exedescription pid process target process PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 960 wrote to memory of 1712 960 OUR REF NO. S03593.pdf.exe OUR REF NO. S03593.pdf.exe PID 1712 wrote to memory of 1664 1712 OUR REF NO. S03593.pdf.exe WScript.exe PID 1712 wrote to memory of 1664 1712 OUR REF NO. S03593.pdf.exe WScript.exe PID 1712 wrote to memory of 1664 1712 OUR REF NO. S03593.pdf.exe WScript.exe PID 1712 wrote to memory of 1664 1712 OUR REF NO. S03593.pdf.exe WScript.exe PID 1664 wrote to memory of 1396 1664 WScript.exe cmd.exe PID 1664 wrote to memory of 1396 1664 WScript.exe cmd.exe PID 1664 wrote to memory of 1396 1664 WScript.exe cmd.exe PID 1664 wrote to memory of 1396 1664 WScript.exe cmd.exe PID 1396 wrote to memory of 1808 1396 cmd.exe oos.exe PID 1396 wrote to memory of 1808 1396 cmd.exe oos.exe PID 1396 wrote to memory of 1808 1396 cmd.exe oos.exe PID 1396 wrote to memory of 1808 1396 cmd.exe oos.exe PID 1808 wrote to memory of 1412 1808 oos.exe oos.exe PID 1808 wrote to memory of 1412 1808 oos.exe oos.exe PID 1808 wrote to memory of 1412 1808 oos.exe oos.exe PID 1808 wrote to memory of 1412 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe PID 1808 wrote to memory of 696 1808 oos.exe oos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe"C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\OUR REF NO. S03593.pdf.exe"{path}"2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\oos.exeC:\Users\Admin\AppData\Roaming\oos.exe5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\oos.exe"{path}"6⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Roaming\oos.exe"{path}"6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\ProgramData\remcos\logs.datFilesize
144B
MD5f7912d4bfac226784d919b9e81a4c971
SHA1fd40c46639a5513f88ef8c708661fc72a3fc7dfc
SHA256b22f582f04ecf2cd7bb28bf3f84120f20a862e30a38e5b3f51db1ef76c3d73ea
SHA512258ca195aa703c41d2a64bcc52f7e9202c6fe0729dbd3d6e10848ddd3e9cbfda62341c733f808bd2e49cb964c1ca51904386b79e65f9b190f288eafe59381390
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C:\Users\Admin\AppData\Local\Temp\install.vbsFilesize
398B
MD5a5d3440f90cbfae712166e20870eaed7
SHA1cc1e1a2945eb2ad475234344f7527ad9e9873647
SHA256960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02
SHA512d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1.0MB
MD56ffcaa9d57ed36d74cac808ffc5fc9b6
SHA189c88ac7b1420300e2f63b5a7f863c7f672ba959
SHA256f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
SHA51249f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1.0MB
MD56ffcaa9d57ed36d74cac808ffc5fc9b6
SHA189c88ac7b1420300e2f63b5a7f863c7f672ba959
SHA256f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
SHA51249f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1.0MB
MD56ffcaa9d57ed36d74cac808ffc5fc9b6
SHA189c88ac7b1420300e2f63b5a7f863c7f672ba959
SHA256f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
SHA51249f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1.0MB
MD56ffcaa9d57ed36d74cac808ffc5fc9b6
SHA189c88ac7b1420300e2f63b5a7f863c7f672ba959
SHA256f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
SHA51249f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
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\Users\Admin\AppData\Roaming\oos.exeFilesize
1.0MB
MD56ffcaa9d57ed36d74cac808ffc5fc9b6
SHA189c88ac7b1420300e2f63b5a7f863c7f672ba959
SHA256f7361813973bf5358dfe900784ab0c2cddd70ad3c1bfdeac1b1de494ffb2a3fa
SHA51249f0afba5127f6caef4a78c3c1450c362543fa88b6eb9921d3621760912914b21aa19e55c3e780c13b21693e645bd151eeb83d58e03746f26434decf8d434676
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memory/696-104-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-95-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
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memory/696-132-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-131-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-124-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-123-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/696-117-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-116-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-113-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/696-110-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-107-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-106-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-105-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-103-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-102-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-100-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/696-99-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/960-57-0x0000000005230000-0x0000000005300000-memory.dmpFilesize
832KB
-
memory/960-58-0x0000000007F90000-0x000000000804E000-memory.dmpFilesize
760KB
-
memory/960-55-0x0000000000AF0000-0x0000000000B30000-memory.dmpFilesize
256KB
-
memory/960-54-0x0000000000ED0000-0x0000000000FDA000-memory.dmpFilesize
1.0MB
-
memory/960-56-0x0000000000390000-0x000000000039E000-memory.dmpFilesize
56KB
-
memory/960-59-0x0000000004F70000-0x0000000004FEA000-memory.dmpFilesize
488KB
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memory/1712-78-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-71-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-60-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-63-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-61-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-64-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-75-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-65-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
-
memory/1712-69-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-67-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-62-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1712-66-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
-
memory/1808-83-0x0000000000C40000-0x0000000000D4A000-memory.dmpFilesize
1.0MB
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memory/1808-85-0x00000000021D0000-0x0000000002210000-memory.dmpFilesize
256KB
-
memory/1808-84-0x00000000021D0000-0x0000000002210000-memory.dmpFilesize
256KB