remcos | 6f493867adbd74622c28e2c1e670b4c1f64566ea830dbf7bd0c5905b858a33c8

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
19/11/2020, 08:22

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General

Target
Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
Size 1.8MB
Sample201119-xpdsd3yd9a
SHA256 6f493867adbd74622c28e2c1e670b4c1f64566ea830dbf7bd0c5905b858a33c8
MD5 da9cf305f26cf0748736fd063f56e801
SHA1 8058d432c1b01f056786b62fb3e518f0c14192f5
SHA512 4f79bbc53f7f1a6f08d7a4793bf58c447e8f62a3c6fa59185e53df007f43afac110d53ce15bc4585f6c33cd67a9c045eb7ecf2e301ae3ebe73bb158d5d17c936
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

databasepropersonombrecomercialideasearchwords.services:7580

Signatures

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

ServiceHost packer 4 IoCs

Detects ServiceHost packer used for .NET malware

resource	yara_rule
behavioral1/memory/324-36-0x0000000000000000-mapping.dmp	servicehost
behavioral1/memory/324-37-0x0000000000000000-mapping.dmp	servicehost
behavioral1/memory/324-35-0x0000000000000000-mapping.dmp	servicehost
behavioral1/memory/324-38-0x0000000000000000-mapping.dmp	servicehost

Executes dropped EXE 2 IoCs

pid	Process
324	PxxoServicesNet.exe
1092	PxxoServicesNet.exe

Loads dropped DLL 5 IoCs

pid	Process
900	cmd.exe
900	cmd.exe
992	WerFault.exe
992	WerFault.exe
992	WerFault.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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesNet.exe\""	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PxxoServicesNet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesNet.exe\""	PxxoServicesNet.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs

pid	Process
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
324	PxxoServicesNet.exe
324	PxxoServicesNet.exe
324	PxxoServicesNet.exe
324	PxxoServicesNet.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1688 set thread context of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 324 set thread context of 1092	324	PxxoServicesNet.exe	35

Program crash 2 IoCs

pid	pid_target	Process	procid_target
620	1688	WerFault.exe	24
992	324	WerFault.exe	34

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
620	WerFault.exe
620	WerFault.exe
620	WerFault.exe
620	WerFault.exe
620	WerFault.exe
324	PxxoServicesNet.exe
324	PxxoServicesNet.exe
324	PxxoServicesNet.exe
992	WerFault.exe
992	WerFault.exe
992	WerFault.exe
992	WerFault.exe
992	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
620	WerFault.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
Token: SeDebugPrivilege	620	WerFault.exe
Token: SeDebugPrivilege	324	PxxoServicesNet.exe
Token: SeDebugPrivilege	992	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1092	PxxoServicesNet.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 1708	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	29
PID 1688 wrote to memory of 620	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	30
PID 1688 wrote to memory of 620	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	30
PID 1688 wrote to memory of 620	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	30
PID 1688 wrote to memory of 620	1688	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	30
PID 1708 wrote to memory of 848	1708	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	31
PID 1708 wrote to memory of 848	1708	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	31
PID 1708 wrote to memory of 848	1708	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	31
PID 1708 wrote to memory of 848	1708	Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe	31
PID 848 wrote to memory of 900	848	WScript.exe	32
PID 848 wrote to memory of 900	848	WScript.exe	32
PID 848 wrote to memory of 900	848	WScript.exe	32
PID 848 wrote to memory of 900	848	WScript.exe	32
PID 900 wrote to memory of 324	900	cmd.exe	34
PID 900 wrote to memory of 324	900	cmd.exe	34
PID 900 wrote to memory of 324	900	cmd.exe	34
PID 900 wrote to memory of 324	900	cmd.exe	34
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 1092	324	PxxoServicesNet.exe	35
PID 324 wrote to memory of 992	324	PxxoServicesNet.exe	36
PID 324 wrote to memory of 992	324	PxxoServicesNet.exe	36
PID 324 wrote to memory of 992	324	PxxoServicesNet.exe	36
PID 324 wrote to memory of 992	324	PxxoServicesNet.exe	36

C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1688
- C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_084727993_69693424_605648848569050599788_7446052_6963949629025_8175427325491_pdf.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:848
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesNet.exe"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:900
    - - C:\Users\Admin\AppData\Roaming\System32\PxxoServicesNet.exe
        
        C:\Users\Admin\AppData\Roaming\System32\PxxoServicesNet.exe
        5⤵
        Executes dropped EXE
        Suspicious use of NtSetInformationThreadHideFromDebugger
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:324
      - C:\Users\Admin\AppData\Roaming\System32\PxxoServicesNet.exe
        
        "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesNet.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:1092
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 324 -s 652
        6⤵
        Loads dropped DLL
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:992
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1688 -s 644
  2⤵
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:620

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/324-21-0x0000000074110000-0x00000000747FE000-memory.dmp

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memory/324-22-0x0000000000B80000-0x0000000000B81000-memory.dmp

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memory/620-13-0x0000000002850000-0x0000000002861000-memory.dmp

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memory/620-9-0x0000000001DD0000-0x0000000001DE1000-memory.dmp

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memory/848-15-0x00000000027D0000-0x00000000027D4000-memory.dmp

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memory/992-30-0x0000000001DD0000-0x0000000001DE1000-memory.dmp

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memory/992-39-0x0000000002800000-0x0000000002811000-memory.dmp

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memory/1092-28-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/1688-3-0x0000000000430000-0x000000000045F000-memory.dmp

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memory/1688-0-0x0000000074110000-0x00000000747FE000-memory.dmp

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memory/1688-1-0x0000000001180000-0x0000000001181000-memory.dmp

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memory/1708-4-0x0000000000400000-0x0000000000422000-memory.dmp

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memory/1708-6-0x0000000000400000-0x0000000000422000-memory.dmp

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