remcos | 991d1e29a1575cacedd43b0cc6254e4e8b905302238b354758933343bfac70da

Analysis

max time kernel
148s
max time network
144s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
12-09-2024 09:07

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General

Target

RFQ-00000947i_pdf.exe
Size

3.3MB
MD5

b3bd87511cd987ba5747e942aad1ddc3
SHA1

56393b3565d8584d8f2a296facd1bf23db3cb60b
SHA256

991d1e29a1575cacedd43b0cc6254e4e8b905302238b354758933343bfac70da
SHA512

bf5c6dc986464cad124d0cf1c5a38323527ef144487c2759bfa1df24f125ed6c02da3e14f696cc9a29caf5f4e7d05741927064e27856170ea0fec78e7b8c2cea
SSDEEP

12288:dRtQiMYE1YZboRaX4UaAevPHrukqyqeFS6IoAI0X2b2IZePV65tCuQxZNCmhydeW:ORYEKt3o3AOPHLXFS6bSLo50uEZzyMW

Score

10^/10

remcos remotehost collection credential_access discovery evasion execution rat stealer trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

127.0.0.1:45588

zuesremmy.duckdns.org:45588

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-5FB45N
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	RFQ-00000947i_pdf.exe

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1276	powershell.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wab.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	RFQ-00000947i_pdf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	RFQ-00000947i_pdf.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 2420	1676	RFQ-00000947i_pdf.exe	40
PID 2420 set thread context of 2988	2420	wab.exe	44
PID 2420 set thread context of 3004	2420	wab.exe	45
PID 2420 set thread context of 2692	2420	wab.exe	46

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe

Runs regedit.exe 1 IoCs

pid	Process
2656	regedit.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1276	powershell.exe
2988	wab.exe
2988	wab.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2420	wab.exe
2420	wab.exe
2420	wab.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1276	powershell.exe
Token: SeDebugPrivilege	2692	wab.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 1276	1676	RFQ-00000947i_pdf.exe	30
PID 1676 wrote to memory of 1276	1676	RFQ-00000947i_pdf.exe	30
PID 1676 wrote to memory of 1276	1676	RFQ-00000947i_pdf.exe	30
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 544	1676	RFQ-00000947i_pdf.exe	32
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2456	1676	RFQ-00000947i_pdf.exe	33
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2760	1676	RFQ-00000947i_pdf.exe	34
PID 1676 wrote to memory of 2628	1676	RFQ-00000947i_pdf.exe	35
PID 1676 wrote to memory of 2628	1676	RFQ-00000947i_pdf.exe	35
PID 1676 wrote to memory of 2628	1676	RFQ-00000947i_pdf.exe	35
PID 1676 wrote to memory of 2628	1676	RFQ-00000947i_pdf.exe	35
PID 1676 wrote to memory of 2112	1676	RFQ-00000947i_pdf.exe	36
PID 1676 wrote to memory of 2112	1676	RFQ-00000947i_pdf.exe	36
PID 1676 wrote to memory of 2112	1676	RFQ-00000947i_pdf.exe	36
PID 1676 wrote to memory of 2112	1676	RFQ-00000947i_pdf.exe	36
PID 1676 wrote to memory of 2768	1676	RFQ-00000947i_pdf.exe	37
PID 1676 wrote to memory of 2768	1676	RFQ-00000947i_pdf.exe	37
PID 1676 wrote to memory of 2768	1676	RFQ-00000947i_pdf.exe	37
PID 1676 wrote to memory of 2768	1676	RFQ-00000947i_pdf.exe	37
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2656	1676	RFQ-00000947i_pdf.exe	38
PID 1676 wrote to memory of 2724	1676	RFQ-00000947i_pdf.exe	39
PID 1676 wrote to memory of 2724	1676	RFQ-00000947i_pdf.exe	39
PID 1676 wrote to memory of 2724	1676	RFQ-00000947i_pdf.exe	39
PID 1676 wrote to memory of 2724	1676	RFQ-00000947i_pdf.exe	39
PID 1676 wrote to memory of 2420	1676	RFQ-00000947i_pdf.exe	40

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	RFQ-00000947i_pdf.exe

C:\Users\Admin\AppData\Local\Temp\RFQ-00000947i_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-00000947i_pdf.exe"
1⤵
- UAC bypass
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1676
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\RFQ-00000947i_pdf.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1276
- C:\Windows\System32\svchost.exe
  "C:\Windows\System32\svchost.exe"
  2⤵
  PID:544
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe"
  2⤵
  PID:2456
- C:\Windows\System32\calc.exe
  "C:\Windows\System32\calc.exe"
  2⤵
  PID:2760
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  PID:2628
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:2112
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
  2⤵
  PID:2768
- C:\Windows\regedit.exe
  "C:\Windows\regedit.exe"
  2⤵
  - Runs regedit.exe
  PID:2656
- C:\Program Files (x86)\Internet Explorer\iexplore.exe
  "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
  2⤵
  PID:2724
- C:\Program Files (x86)\Windows Mail\wab.exe
  "C:\Program Files (x86)\Windows Mail\wab.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  PID:2420
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\acynygjocrbcxkvdegxkgrpmjo"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2988
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\kwmgqzuhqzthzqjhnrsljwcvkdukw"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3004
- - C:\Program Files (x86)\Windows Mail\wab.exe
    "C:\Program Files (x86)\Windows Mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\vyryrjejehlljwxlwbffujwmtjetxvdcr"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2692
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1676 -s 920
  2⤵
  PID:1476

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scripting

T1064

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Scripting

T1064

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\acynygjocrbcxkvdegxkgrpmjo

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/544-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/544-4-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1276-18-0x0000000002F20000-0x0000000002FA0000-memory.dmp

Filesize
512KB

Download
memory/1276-35-0x000000001B8D0000-0x000000001BBB2000-memory.dmp

Filesize
2.9MB

Download
memory/1276-36-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/1676-3-0x0000000001F10000-0x0000000001FE2000-memory.dmp

Filesize
840KB

Download
memory/1676-2-0x000007FEF5D40000-0x000007FEF672C000-memory.dmp

Filesize
9.9MB

Download
memory/1676-0-0x000007FEF5D43000-0x000007FEF5D44000-memory.dmp

Filesize
4KB

Download
memory/1676-91-0x000007FEF5D43000-0x000007FEF5D44000-memory.dmp

Filesize
4KB

Download
memory/1676-92-0x000007FEF5D40000-0x000007FEF672C000-memory.dmp

Filesize
9.9MB

Download
memory/1676-1-0x0000000000970000-0x0000000000978000-memory.dmp

Filesize
32KB

Download