remcos | 8d087e56deb745a40c704cd0a508f9f07b697b3ff44ae660ee581f7f42e4e160

Analysis

max time kernel
149s
max time network
145s
platform
windows7_x64
resource
win7v20201028
submitted
15/02/2021, 19:48

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General

Target
New Order.exe
Size 813KB
Sample210215-6ftyee3yaj
SHA256 8d087e56deb745a40c704cd0a508f9f07b697b3ff44ae660ee581f7f42e4e160
MD5 dec90801aac280bb0cf01fab56f30bf3
SHA1 c8cac95cbc28dd1303dc73eab11d9c3bca4cf6c3
SHA512 038f0e1951aee45fd2b6a2b0b72ffc8661676a11cc9ff695709f4a2e666f5881e6d9193af53dc4fdace493cdee50ae3e0753d74d4519061afad1837565fbb769
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Signatures

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

Executes dropped EXE 3 IoCs

pid	Process
1064	remcos.exe
1412	remcos.exe
1988	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
772	cmd.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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	New Order.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	New Order.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2028 set thread context of 2000	2028	New Order.exe	29
PID 1064 set thread context of 1988	1064	remcos.exe	35
PID 1988 set thread context of 1088	1988	remcos.exe	36

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1064	remcos.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1064	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1988	remcos.exe

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2028 wrote to memory of 2000	2028	New Order.exe	29
PID 2000 wrote to memory of 112	2000	New Order.exe	30
PID 2000 wrote to memory of 112	2000	New Order.exe	30
PID 2000 wrote to memory of 112	2000	New Order.exe	30
PID 2000 wrote to memory of 112	2000	New Order.exe	30
PID 112 wrote to memory of 772	112	WScript.exe	31
PID 112 wrote to memory of 772	112	WScript.exe	31
PID 112 wrote to memory of 772	112	WScript.exe	31
PID 112 wrote to memory of 772	112	WScript.exe	31
PID 772 wrote to memory of 1064	772	cmd.exe	33
PID 772 wrote to memory of 1064	772	cmd.exe	33
PID 772 wrote to memory of 1064	772	cmd.exe	33
PID 772 wrote to memory of 1064	772	cmd.exe	33
PID 1064 wrote to memory of 1412	1064	remcos.exe	34
PID 1064 wrote to memory of 1412	1064	remcos.exe	34
PID 1064 wrote to memory of 1412	1064	remcos.exe	34
PID 1064 wrote to memory of 1412	1064	remcos.exe	34
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1064 wrote to memory of 1988	1064	remcos.exe	35
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36
PID 1988 wrote to memory of 1088	1988	remcos.exe	36

C:\Users\Admin\AppData\Local\Temp\New Order.exe
"C:\Users\Admin\AppData\Local\Temp\New Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2028
- C:\Users\Admin\AppData\Local\Temp\New Order.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:112
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:772
    - - 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:1064
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        "{path}"
        6⤵
        Executes dropped EXE
        
        PID:1412
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        "{path}"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1988
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:1088

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/112-16-0x00000000025E0000-0x00000000025E4000-memory.dmp

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memory/1064-22-0x00000000010B0000-0x00000000010B1000-memory.dmp

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memory/1064-21-0x0000000074E60000-0x000000007554E000-memory.dmp

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memory/1064-25-0x0000000004C00000-0x0000000004C01000-memory.dmp

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memory/1088-32-0x0000000000400000-0x00000000004D2000-memory.dmp

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memory/1988-34-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2000-10-0x0000000075C31000-0x0000000075C33000-memory.dmp

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memory/2000-8-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2000-14-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2028-7-0x0000000005460000-0x000000000552D000-memory.dmp

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memory/2028-3-0x0000000000B90000-0x0000000000B91000-memory.dmp

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memory/2028-5-0x0000000000300000-0x0000000000301000-memory.dmp

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memory/2028-2-0x0000000074EE0000-0x00000000755CE000-memory.dmp

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memory/2028-6-0x00000000002E0000-0x00000000002E2000-memory.dmp

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