remcos | be0874a5aac730116aa21f21765232ae5ef951d8714c9eff0e5f3aa23edfbdd0

Analysis

max time kernel
150s
max time network
151s
platform
windows7_x64
resource
win7v20201028
submitted
27/11/2020, 15:22

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General

Target
PaymentRemittanceInfo.exe
Size 205KB
Sample201127-gpade5w3tn
SHA256 be0874a5aac730116aa21f21765232ae5ef951d8714c9eff0e5f3aa23edfbdd0
MD5 a426addb754c42706c56f857191d9f6c
SHA1 fdbc48bdd27259e462ffe82593cfd9a507998f44
SHA512 f502deda759fd36ce7e66f1f7a5900299d39a63ec0b38895c4cf165c3e6fd4ee3b515336b0823231450ae5316d12de6a7ca4a26357145e53c90b0a371a2d1908
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

89.249.74.213:40511

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1088	msworrd.exe
1800	msworrd.exe

Loads dropped DLL 1 IoCs

pid	Process
1244	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\	PaymentRemittanceInfo.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\mswordlive = "\"C:\\Windows\\SysWOW64\\mssofficee\\msworrd.exe\""	PaymentRemittanceInfo.exe
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	msworrd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\mswordlive = "\"C:\\Windows\\SysWOW64\\mssofficee\\msworrd.exe\""	msworrd.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mssofficee\msworrd.exe	PaymentRemittanceInfo.exe
File opened for modification	C:\Windows\SysWOW64\mssofficee\msworrd.exe	PaymentRemittanceInfo.exe
File opened for modification	C:\Windows\SysWOW64\logs.dat	msworrd.exe
File created	C:\Windows\SysWOW64\logs.dat	msworrd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 836 set thread context of 1724	836	PaymentRemittanceInfo.exe	29
PID 1088 set thread context of 1800	1088	msworrd.exe	34
PID 1800 set thread context of 1040	1800	msworrd.exe	35

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	836	PaymentRemittanceInfo.exe
Token: SeDebugPrivilege	1088	msworrd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1800	msworrd.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 836 wrote to memory of 1724	836	PaymentRemittanceInfo.exe	29
PID 1724 wrote to memory of 1800	1724	PaymentRemittanceInfo.exe	30
PID 1724 wrote to memory of 1800	1724	PaymentRemittanceInfo.exe	30
PID 1724 wrote to memory of 1800	1724	PaymentRemittanceInfo.exe	30
PID 1724 wrote to memory of 1800	1724	PaymentRemittanceInfo.exe	30
PID 1800 wrote to memory of 1244	1800	WScript.exe	31
PID 1800 wrote to memory of 1244	1800	WScript.exe	31
PID 1800 wrote to memory of 1244	1800	WScript.exe	31
PID 1800 wrote to memory of 1244	1800	WScript.exe	31
PID 1244 wrote to memory of 1088	1244	cmd.exe	33
PID 1244 wrote to memory of 1088	1244	cmd.exe	33
PID 1244 wrote to memory of 1088	1244	cmd.exe	33
PID 1244 wrote to memory of 1088	1244	cmd.exe	33
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1088 wrote to memory of 1800	1088	msworrd.exe	34
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35
PID 1800 wrote to memory of 1040	1800	msworrd.exe	35

C:\Users\Admin\AppData\Local\Temp\PaymentRemittanceInfo.exe
"C:\Users\Admin\AppData\Local\Temp\PaymentRemittanceInfo.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:836
- C:\Users\Admin\AppData\Local\Temp\PaymentRemittanceInfo.exe
  "C:\Users\Admin\AppData\Local\Temp\PaymentRemittanceInfo.exe"
  2⤵
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1724
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1800
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\mssofficee\msworrd.exe"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1244
    - - C:\Windows\SysWOW64\mssofficee\msworrd.exe
        
        C:\Windows\SysWOW64\mssofficee\msworrd.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1088
      - C:\Windows\SysWOW64\mssofficee\msworrd.exe
        
        "C:\Windows\SysWOW64\mssofficee\msworrd.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Drops file in System32 directory
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1800
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:1040

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

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Downloads

memory/836-3-0x0000000000B40000-0x0000000000B41000-memory.dmp

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memory/836-5-0x0000000000460000-0x00000000004AC000-memory.dmp

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memory/836-1061-0x000000001D8E0000-0x000000001D8F6000-memory.dmp

Download

memory/836-2-0x00000000746D0000-0x0000000074DBE000-memory.dmp

Download

memory/1040-2269-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/1040-2268-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/1040-2266-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/1088-1073-0x00000000739B0000-0x000000007409E000-memory.dmp

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memory/1088-1074-0x0000000000380000-0x0000000000381000-memory.dmp

Download

memory/1724-1064-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/1724-1062-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/1800-2265-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/1800-1068-0x00000000027B0000-0x00000000027B4000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads