remcos | 15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587

General

Target
goodluckvpn.exe
Size 388KB
Sample201012-sc1wxrfqt2
SHA256 15170d0dbe467efc4e38156ed4e03702ae19af44c100d7df7a75c6dbdb7ac587
MD5 09ae134443ee2e63240664c93e2c6afd
SHA1 e724267c4405c6e0bba356c4193662017ed29d16
SHA512 5499a6baad57aac8c3c77991d65e36983a5d244577ec4e969cf546178b62823053cbd550fec29bbfaaa56b47fab357440125f535579cc7d58932b8ebec05d845
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat upx

Malware Config

Signatures

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

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\slavestrio = "\"C:\\Program Files (x86)\\slaves\\slaves.exe\""	goodluckvpn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	slaves.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\slavestrio = "\"C:\\Program Files (x86)\\slaves\\slaves.exe\""	slaves.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	goodluckvpn.exe

Executes dropped EXE 2 IoCs

pid	Process
2408	slaves.exe
2428	slaves.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3888-0-0x0000000000400000-0x00000000004C3000-memory.dmp	upx
behavioral2/files/0x000200000001ad30-9.dat	upx
behavioral2/files/0x000200000001ad30-10.dat	upx
behavioral2/memory/2408-11-0x0000000000400000-0x00000000004C3000-memory.dmp	upx
behavioral2/files/0x000200000001ad30-14.dat	upx

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\slavestrio = "\"C:\\Program Files (x86)\\slaves\\slaves.exe\""	goodluckvpn.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	goodluckvpn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\slavestrio = "\"C:\\Program Files (x86)\\slaves\\slaves.exe\""	goodluckvpn.exe
Key created	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\	slaves.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\slavestrio = "\"C:\\Program Files (x86)\\slaves\\slaves.exe\""	slaves.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	slaves.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\slavestrio = "\"C:\\Program Files (x86)\\slaves\\slaves.exe\""	slaves.exe
Key created	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\	goodluckvpn.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3888 set thread context of 1292	3888	goodluckvpn.exe	72
PID 2408 set thread context of 2428	2408	slaves.exe	77

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\slaves\slaves.exe	goodluckvpn.exe
File created	C:\Program Files (x86)\slaves\slaves.exe	goodluckvpn.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000_Classes\Local Settings	goodluckvpn.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3888	goodluckvpn.exe
3888	goodluckvpn.exe
1292	goodluckvpn.exe
1292	goodluckvpn.exe
1292	goodluckvpn.exe
1292	goodluckvpn.exe
2408	slaves.exe
2408	slaves.exe
2428	slaves.exe
2428	slaves.exe
2428	slaves.exe
2428	slaves.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2428	slaves.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3888	goodluckvpn.exe
2408	slaves.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2428	slaves.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 1292	3888	goodluckvpn.exe	72
PID 3888 wrote to memory of 1292	3888	goodluckvpn.exe	72
PID 3888 wrote to memory of 1292	3888	goodluckvpn.exe	72
PID 1292 wrote to memory of 1716	1292	goodluckvpn.exe	73
PID 1292 wrote to memory of 1716	1292	goodluckvpn.exe	73
PID 1292 wrote to memory of 1716	1292	goodluckvpn.exe	73
PID 1716 wrote to memory of 2148	1716	WScript.exe	74
PID 1716 wrote to memory of 2148	1716	WScript.exe	74
PID 1716 wrote to memory of 2148	1716	WScript.exe	74
PID 2148 wrote to memory of 2408	2148	cmd.exe	76
PID 2148 wrote to memory of 2408	2148	cmd.exe	76
PID 2148 wrote to memory of 2408	2148	cmd.exe	76
PID 2408 wrote to memory of 2428	2408	slaves.exe	77
PID 2408 wrote to memory of 2428	2408	slaves.exe	77
PID 2408 wrote to memory of 2428	2408	slaves.exe	77
PID 2428 wrote to memory of 3440	2428	slaves.exe	78
PID 2428 wrote to memory of 3440	2428	slaves.exe	78
PID 2428 wrote to memory of 3440	2428	slaves.exe	78

C:\Users\Admin\AppData\Local\Temp\goodluckvpn.exe
"C:\Users\Admin\AppData\Local\Temp\goodluckvpn.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3888
- C:\Users\Admin\AppData\Local\Temp\goodluckvpn.exe
  "C:\Users\Admin\AppData\Local\Temp\goodluckvpn.exe"
  2⤵
  - Adds policy Run key to start application
  - Adds Run key to start application
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1292
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1716
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Program Files (x86)\slaves\slaves.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2148
    - - C:\Program Files (x86)\slaves\slaves.exe
        
        "C:\Program Files (x86)\slaves\slaves.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:2408
      - C:\Program Files (x86)\slaves\slaves.exe
        
        "C:\Program Files (x86)\slaves\slaves.exe"
        6⤵
        Adds policy Run key to start application
        Executes dropped EXE
        Adds Run key to start application
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2428
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:3440

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1292-4-0x0000000000400000-0x0000000000577000-memory.dmp

Download

memory/1292-3-0x0000000000400000-0x0000000000577000-memory.dmp

Download

memory/1292-1-0x0000000000400000-0x0000000000577000-memory.dmp

Download

memory/2408-11-0x0000000000400000-0x00000000004C3000-memory.dmp

Download

memory/2428-16-0x0000000000400000-0x0000000000577000-memory.dmp

Download

memory/3888-0-0x0000000000400000-0x00000000004C3000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads