remcos | 1befcab4a8d97cea8592fa608814f038fd956a5f1f2ddfd9ee8b9402045a705a

Analysis

max time kernel
148s
max time network
151s
platform
windows10_x64
resource
win10v200722
submitted
09/10/2020, 06:25

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General

Target
Dokumen penerimaan DHL 1190406570, pdf.exe
Size 608KB
Sample201009-qlgenzh62a
SHA256 1befcab4a8d97cea8592fa608814f038fd956a5f1f2ddfd9ee8b9402045a705a
MD5 01fec6f49769c6ce8790807c6f956e52
SHA1 bc2c53b6f35fcb3ba7f3b38c66448a5397fa9f57
SHA512 fde4334f374f6059e6aa8ca88bd91fddac2a1d3cf74477531eba20ab0a2eca5fd8590f39bdc35bb17e5abb1be795542517f93bcfb1d3118e118f7478a6b7ba4c
MD5 SHA1 SHA512

Score

10^/10

persistence rat remcos

Malware Config

Extracted

Family

remcos

doublegrace2020.ddns.net:7171

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Executes dropped EXE 2 IoCs

pid	Process
3632	remcos.exe
1172	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2168186643-810464528-1121082739-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Dokumen penerimaan DHL 1190406570, pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2168186643-810464528-1121082739-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	Dokumen penerimaan DHL 1190406570, pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-2168186643-810464528-1121082739-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2168186643-810464528-1121082739-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 512 set thread context of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 3632 set thread context of 1172	3632	remcos.exe	85

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3584	schtasks.exe
972	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2168186643-810464528-1121082739-1000_Classes\Local Settings	Dokumen penerimaan DHL 1190406570, pdf.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
512	Dokumen penerimaan DHL 1190406570, pdf.exe
3632	remcos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	512	Dokumen penerimaan DHL 1190406570, pdf.exe
Token: SeDebugPrivilege	3632	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1172	remcos.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 512 wrote to memory of 3584	512	Dokumen penerimaan DHL 1190406570, pdf.exe	76
PID 512 wrote to memory of 3584	512	Dokumen penerimaan DHL 1190406570, pdf.exe	76
PID 512 wrote to memory of 3584	512	Dokumen penerimaan DHL 1190406570, pdf.exe	76
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 512 wrote to memory of 1944	512	Dokumen penerimaan DHL 1190406570, pdf.exe	78
PID 1944 wrote to memory of 1540	1944	Dokumen penerimaan DHL 1190406570, pdf.exe	79
PID 1944 wrote to memory of 1540	1944	Dokumen penerimaan DHL 1190406570, pdf.exe	79
PID 1944 wrote to memory of 1540	1944	Dokumen penerimaan DHL 1190406570, pdf.exe	79
PID 1540 wrote to memory of 3020	1540	WScript.exe	80
PID 1540 wrote to memory of 3020	1540	WScript.exe	80
PID 1540 wrote to memory of 3020	1540	WScript.exe	80
PID 3020 wrote to memory of 3632	3020	cmd.exe	82
PID 3020 wrote to memory of 3632	3020	cmd.exe	82
PID 3020 wrote to memory of 3632	3020	cmd.exe	82
PID 3632 wrote to memory of 972	3632	remcos.exe	83
PID 3632 wrote to memory of 972	3632	remcos.exe	83
PID 3632 wrote to memory of 972	3632	remcos.exe	83
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85
PID 3632 wrote to memory of 1172	3632	remcos.exe	85

C:\Users\Admin\AppData\Local\Temp\Dokumen penerimaan DHL 1190406570, pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Dokumen penerimaan DHL 1190406570, pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:512
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JvumHgNFJdG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4B33.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3584
- C:\Users\Admin\AppData\Local\Temp\Dokumen penerimaan DHL 1190406570, pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Dokumen penerimaan DHL 1190406570, pdf.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1540
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3020
    - - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3632
      - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JvumHgNFJdG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp51C5.tmp"
        6⤵
        Creates scheduled task(s)
        
        PID:972
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:1172

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/512-9-0x000000000A6B0000-0x000000000A70E000-memory.dmp

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memory/512-8-0x0000000008170000-0x000000000A16F000-memory.dmp

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memory/512-7-0x0000000005890000-0x0000000005891000-memory.dmp

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memory/512-10-0x0000000005C20000-0x0000000005C6D000-memory.dmp

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memory/512-6-0x00000000055A0000-0x00000000055A1000-memory.dmp

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memory/512-5-0x00000000056C0000-0x00000000056C1000-memory.dmp

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memory/512-0-0x0000000073E00000-0x00000000744EE000-memory.dmp

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memory/512-4-0x0000000005C70000-0x0000000005C71000-memory.dmp

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memory/512-3-0x0000000005620000-0x0000000005621000-memory.dmp

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memory/512-1-0x0000000000CF0000-0x0000000000CF1000-memory.dmp

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memory/1172-38-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/1944-13-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/1944-15-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/3632-22-0x0000000073E00000-0x00000000744EE000-memory.dmp

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