remcos | 3c1f8c10253bfe7388f5d51391a2253b56e348f92ec68ad70f78a4d7f526147d

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
24-08-2024 18:59

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General

Target

excel.exe
Size

1.0MB
MD5

e27d56543ed9f63f27ce9de7222059ab
SHA1

6dd4fb5f2a72f055b2dda672a731fd7adf63aaa0
SHA256

3c1f8c10253bfe7388f5d51391a2253b56e348f92ec68ad70f78a4d7f526147d
SHA512

9b36200aa2d45043d3e4e12c6ef308c6f0fd6616900dc29524cd79b5bebc4d1cd0ecc27884b00ce491a85143c444d2e7d7c2e69573204146bf1250239a20f01c
SSDEEP

24576:9J23hprGGlw6WuIy4HVHPA6DKostY3foGnoXnUrvSA:9J2TqGlauIy4HlDKoOmfX2

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

91.92.241.171:89

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-ERWHKE
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

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
608	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2500 set thread context of 2760	2500	excel.exe	35

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	excel.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	excel.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2680	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2500	excel.exe
2500	excel.exe
2500	excel.exe
608	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2500	excel.exe
Token: SeDebugPrivilege	608	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 608	2500	excel.exe	31
PID 2500 wrote to memory of 608	2500	excel.exe	31
PID 2500 wrote to memory of 608	2500	excel.exe	31
PID 2500 wrote to memory of 608	2500	excel.exe	31
PID 2500 wrote to memory of 2680	2500	excel.exe	33
PID 2500 wrote to memory of 2680	2500	excel.exe	33
PID 2500 wrote to memory of 2680	2500	excel.exe	33
PID 2500 wrote to memory of 2680	2500	excel.exe	33
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35
PID 2500 wrote to memory of 2760	2500	excel.exe	35

C:\Users\Admin\AppData\Local\Temp\excel.exe
"C:\Users\Admin\AppData\Local\Temp\excel.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\gTtHsFyH.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:608
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gTtHsFyH" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4A49.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2680
- C:\Users\Admin\AppData\Local\Temp\excel.exe
  "C:\Users\Admin\AppData\Local\Temp\excel.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4A49.tmp

Filesize
1KB

MD5
d9c8320db0f4cb89f04daf9585d6e600

SHA1
f0f9336c3e680959c8dc18c6555d9a3f5da67f57

SHA256
4a855a2bc298a08755c4087d66377edfe315600b9369247801922c0d3cabbb1d

SHA512
276917e45e2f95841af12296a8a8407cc573075125250cd5a337ec1fa30caa54063825038cf90da98f2cb8bc684bcb2bf4a7a651be098f4dd6c4c34bda9976db

Download Submit
memory/2500-0-0x0000000074A0E000-0x0000000074A0F000-memory.dmp

Filesize
4KB

Download
memory/2500-1-0x0000000000BC0000-0x0000000000CCE000-memory.dmp

Filesize
1.1MB

Download
memory/2500-2-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2500-3-0x0000000000A90000-0x0000000000AAA000-memory.dmp

Filesize
104KB

Download
memory/2500-4-0x0000000000AC0000-0x0000000000AC8000-memory.dmp

Filesize
32KB

Download
memory/2500-5-0x0000000074A0E000-0x0000000074A0F000-memory.dmp

Filesize
4KB

Download
memory/2500-6-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2500-7-0x0000000000B60000-0x0000000000B6C000-memory.dmp

Filesize
48KB

Download
memory/2500-8-0x0000000005E20000-0x0000000005EE0000-memory.dmp

Filesize
768KB

Download
memory/2500-37-0x0000000074A00000-0x00000000750EE000-memory.dmp

Filesize
6.9MB

Download
memory/2760-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-32-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2760-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2760-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download