remcos | c14895a7d0ca2633b565af7c08e77aef32397f4fdc78fd3560d2f23d89aa6d6a

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7v20201028
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 4 IoCs

Detects ServiceHost packer used for .NET malware

resource	yara_rule
behavioral1/memory/1492-39-0x0000000000000000-mapping.dmp	servicehost
behavioral1/memory/1492-40-0x0000000000000000-mapping.dmp	servicehost
behavioral1/memory/1492-38-0x0000000000000000-mapping.dmp	servicehost
behavioral1/memory/1492-41-0x0000000000000000-mapping.dmp	servicehost

Executes dropped EXE 4 IoCs

pid	Process
1492	vlc.exe
840	vlc.exe
1200	vlc.exe
1404	vlc.exe

Loads dropped DLL 5 IoCs

pid	Process
1680	cmd.exe
1680	cmd.exe
1068	WerFault.exe
1068	WerFault.exe
1068	WerFault.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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	AQW.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc.exe\""	AQW.exe
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\	vlc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc.exe\""	vlc.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs

pid	Process
1696	AQW.exe
1696	AQW.exe
1696	AQW.exe
1696	AQW.exe
1492	vlc.exe
1492	vlc.exe
1492	vlc.exe
1492	vlc.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1696 set thread context of 1732	1696	AQW.exe	29
PID 1492 set thread context of 840	1492	vlc.exe	35
PID 840 set thread context of 1200	840	vlc.exe	37
PID 840 set thread context of 1404	840	vlc.exe	39

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1108	1696	WerFault.exe	24
1068	1492	WerFault.exe	34

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
1696	AQW.exe
1696	AQW.exe
1696	AQW.exe
1108	WerFault.exe
1108	WerFault.exe
1108	WerFault.exe
1108	WerFault.exe
1108	WerFault.exe
1492	vlc.exe
1492	vlc.exe
1492	vlc.exe
1068	WerFault.exe
1068	WerFault.exe
1068	WerFault.exe
1068	WerFault.exe
1068	WerFault.exe
1200	vlc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1108	WerFault.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	AQW.exe
Token: SeDebugPrivilege	1108	WerFault.exe
Token: SeDebugPrivilege	1492	vlc.exe
Token: SeDebugPrivilege	1068	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
840	vlc.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1732	1696	AQW.exe	29
PID 1696 wrote to memory of 1108	1696	AQW.exe	30
PID 1696 wrote to memory of 1108	1696	AQW.exe	30
PID 1696 wrote to memory of 1108	1696	AQW.exe	30
PID 1696 wrote to memory of 1108	1696	AQW.exe	30
PID 1732 wrote to memory of 876	1732	AQW.exe	31
PID 1732 wrote to memory of 876	1732	AQW.exe	31
PID 1732 wrote to memory of 876	1732	AQW.exe	31
PID 1732 wrote to memory of 876	1732	AQW.exe	31
PID 876 wrote to memory of 1680	876	WScript.exe	32
PID 876 wrote to memory of 1680	876	WScript.exe	32
PID 876 wrote to memory of 1680	876	WScript.exe	32
PID 876 wrote to memory of 1680	876	WScript.exe	32
PID 1680 wrote to memory of 1492	1680	cmd.exe	34
PID 1680 wrote to memory of 1492	1680	cmd.exe	34
PID 1680 wrote to memory of 1492	1680	cmd.exe	34
PID 1680 wrote to memory of 1492	1680	cmd.exe	34
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 840	1492	vlc.exe	35
PID 1492 wrote to memory of 1068	1492	vlc.exe	36
PID 1492 wrote to memory of 1068	1492	vlc.exe	36
PID 1492 wrote to memory of 1068	1492	vlc.exe	36
PID 1492 wrote to memory of 1068	1492	vlc.exe	36
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 1200	840	vlc.exe	37
PID 840 wrote to memory of 368	840	vlc.exe	38
PID 840 wrote to memory of 368	840	vlc.exe	38
PID 840 wrote to memory of 368	840	vlc.exe	38
PID 840 wrote to memory of 368	840	vlc.exe	38
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39
PID 840 wrote to memory of 1404	840	vlc.exe	39

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:1696
- C:\Users\Admin\AppData\Local\Temp\AQW.exe
  "C:\Users\Admin\AppData\Local\Temp\AQW.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1732
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\vlc.exe"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1680
    - - 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:1492
      - 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 use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:840
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe /stext "C:\Users\Admin\AppData\Local\Temp\uuavkbdufihferbmleeeliojjjfvicdip"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        
        PID:1200
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe /stext "C:\Users\Admin\AppData\Local\Temp\wogok"
        7⤵
        
        PID:368
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe /stext "C:\Users\Admin\AppData\Local\Temp\gqtzllyp"
        7⤵
        Executes dropped EXE
        
        PID:1404
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 648
        6⤵
        Loads dropped DLL
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1068
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 640
  2⤵
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:1108

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

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Downloads

memory/840-31-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/876-18-0x0000000002710000-0x0000000002714000-memory.dmp

Download

memory/1068-33-0x0000000002200000-0x0000000002211000-memory.dmp

Download

memory/1068-42-0x00000000025D0000-0x00000000025E1000-memory.dmp

Download

memory/1108-15-0x0000000002740000-0x0000000002751000-memory.dmp

Download

memory/1108-10-0x0000000001FF0000-0x0000000002001000-memory.dmp

Download

memory/1200-44-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/1200-50-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/1200-47-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/1404-53-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/1404-52-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/1404-48-0x0000000000400000-0x0000000000457000-memory.dmp

Download

memory/1492-25-0x0000000000B40000-0x0000000000B41000-memory.dmp

Download

memory/1492-24-0x0000000074D20000-0x000000007540E000-memory.dmp

Download

memory/1596-54-0x000007FEF7D90000-0x000007FEF800A000-memory.dmp

Download

memory/1696-5-0x00000000004E0000-0x000000000050F000-memory.dmp

Download

memory/1696-3-0x0000000000120000-0x0000000000121000-memory.dmp

Download

memory/1696-2-0x0000000074D20000-0x000000007540E000-memory.dmp

Download

memory/1732-8-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/1732-6-0x0000000000400000-0x0000000000421000-memory.dmp

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