remcos | c14895a7d0ca2633b565af7c08e77aef32397f4fdc78fd3560d2f23d89aa6d6a

Analysis

max time kernel
149s
max time network
151s
platform
windows10_x64
resource
win10v20201028
submitted
17/12/2020, 05:22

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General

Target
AQW.exe
Size 1.9MB
Sample201217-fnqnemefmn
SHA256 c14895a7d0ca2633b565af7c08e77aef32397f4fdc78fd3560d2f23d89aa6d6a
MD5 3a6ac6822e16f878b966cac3365e12a0
SHA1 b6a15422e7c771b6b5c2177c2ff5584d7028aaf3
SHA512 b4572a7abc8e410e7d377a1ce8915df636d1bf9de6c0fac2889651743a4ea522f58dc4fb3ed0ba15e13396e41f3bc7eb2143e8699589f376463a1c105ee840fe
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat spyware

Malware Config

Extracted

Family

remcos

swryijgrvcsgkopnmcdertvgdswbvmophtfdczxs.ydns.eu:2017

Signatures

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

ServiceHost packer 5 IoCs

Detects ServiceHost packer used for .NET malware

resource	yara_rule
behavioral2/memory/1308-38-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/1308-39-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/1308-40-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/1308-41-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/1308-42-0x0000000000000000-mapping.dmp	servicehost

Executes dropped EXE 5 IoCs

pid	Process
1308	vlc.exe
4012	vlc.exe
2448	vlc.exe
2376	vlc.exe
752	vlc.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

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-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	AQW.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc.exe\""	AQW.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	vlc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc.exe\""	vlc.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 11 IoCs

pid	Process
64	AQW.exe
64	AQW.exe
64	AQW.exe
64	AQW.exe
64	AQW.exe
64	AQW.exe
1308	vlc.exe
1308	vlc.exe
1308	vlc.exe
1308	vlc.exe
1308	vlc.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 64 set thread context of 804	64	AQW.exe	76
PID 1308 set thread context of 4012	1308	vlc.exe	85
PID 4012 set thread context of 2448	4012	vlc.exe	87
PID 4012 set thread context of 2376	4012	vlc.exe	88
PID 4012 set thread context of 752	4012	vlc.exe	89

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2076	64	WerFault.exe	68
1592	1308	WerFault.exe	82

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	AQW.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
64	AQW.exe
64	AQW.exe
64	AQW.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
2076	WerFault.exe
1308	vlc.exe
1308	vlc.exe
1308	vlc.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
1592	WerFault.exe
2448	vlc.exe
2448	vlc.exe
2376	vlc.exe
2376	vlc.exe
2448	vlc.exe
2448	vlc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4012	vlc.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	64	AQW.exe
Token: SeRestorePrivilege	2076	WerFault.exe
Token: SeBackupPrivilege	2076	WerFault.exe
Token: SeDebugPrivilege	2076	WerFault.exe
Token: SeDebugPrivilege	1308	vlc.exe
Token: SeDebugPrivilege	1592	WerFault.exe
Token: SeDebugPrivilege	2376	vlc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4012	vlc.exe

Suspicious use of WriteProcessMemory 53 IoCs

description	pid	Process	procid_target
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 64 wrote to memory of 804	64	AQW.exe	76
PID 804 wrote to memory of 968	804	AQW.exe	79
PID 804 wrote to memory of 968	804	AQW.exe	79
PID 804 wrote to memory of 968	804	AQW.exe	79
PID 968 wrote to memory of 1168	968	WScript.exe	80
PID 968 wrote to memory of 1168	968	WScript.exe	80
PID 968 wrote to memory of 1168	968	WScript.exe	80
PID 1168 wrote to memory of 1308	1168	cmd.exe	82
PID 1168 wrote to memory of 1308	1168	cmd.exe	82
PID 1168 wrote to memory of 1308	1168	cmd.exe	82
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 1308 wrote to memory of 4012	1308	vlc.exe	85
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2448	4012	vlc.exe	87
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 2376	4012	vlc.exe	88
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89
PID 4012 wrote to memory of 752	4012	vlc.exe	89

C:\Users\Admin\AppData\Local\Temp\AQW.exe
"C:\Users\Admin\AppData\Local\Temp\AQW.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:64
- C:\Users\Admin\AppData\Local\Temp\AQW.exe
  "C:\Users\Admin\AppData\Local\Temp\AQW.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:968
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\vlc.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1168
    - - C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.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:1308
      - C:\Users\Admin\AppData\Roaming\vlc.exe
        
        "C:\Users\Admin\AppData\Roaming\vlc.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetThreadContext
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:4012
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe /stext "C:\Users\Admin\AppData\Local\Temp\rgoarchfhvzypzyrxiwjanxls"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        
        PID:2448
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe /stext "C:\Users\Admin\AppData\Local\Temp\bautsvrhvdrlafuvosillarctnbk"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2376
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe /stext "C:\Users\Admin\AppData\Local\Temp\dczlsfcajljqctizxddmofmlccltrpfp"
        7⤵
        Executes dropped EXE
        
        PID:752
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1308 -s 1096
        6⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1592
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 64 -s 1100
  2⤵
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2076

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

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/64-9-0x00000000054C0000-0x00000000054EF000-memory.dmp

Download

memory/64-8-0x00000000054B0000-0x00000000054B1000-memory.dmp

Download

memory/64-7-0x0000000005530000-0x0000000005531000-memory.dmp

Download

memory/64-2-0x0000000073160000-0x000000007384E000-memory.dmp

Download

memory/64-6-0x00000000093E0000-0x00000000093E1000-memory.dmp

Download

memory/64-5-0x00000000097E0000-0x00000000097E1000-memory.dmp

Download

memory/64-3-0x0000000000A00000-0x0000000000A01000-memory.dmp

Download

memory/752-68-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/752-60-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/752-70-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/804-10-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/804-12-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/1308-23-0x0000000073160000-0x000000007384E000-memory.dmp

Download

memory/1592-35-0x0000000004940000-0x0000000004941000-memory.dmp

Download

memory/1592-45-0x0000000005080000-0x0000000005081000-memory.dmp

Download

memory/2076-13-0x0000000004C10000-0x0000000004C11000-memory.dmp

Download

memory/2076-18-0x0000000005450000-0x0000000005451000-memory.dmp

Download

memory/2376-50-0x0000000000400000-0x0000000000424000-memory.dmp

Download

memory/2376-59-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2376-61-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/2448-44-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/2448-51-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/2448-55-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/4012-34-0x0000000000400000-0x0000000000421000-memory.dmp

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