remcos | 5e979880469bfba9dc9b850ed945530fc277fcbdd96227661972c89e700ecd1e

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
31/07/2024, 09:05

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General

Target
MalwareBazaar.exe
Size 1.0MB
Sample240731-k187ea1hqa
SHA256 5e979880469bfba9dc9b850ed945530fc277fcbdd96227661972c89e700ecd1e
MD5 15ebe72d59678d3186811b138b4ad040
SHA1 ab07d7c4539dad475033cdcdec8d237ffc0409d3
SHA512 d6df3780ef988d70824d5ff534b4ad8b7ed3278490bc29f8349fa43526d028c035044c80eb1a77c8dcedb084645be978ef60874d67fd194e6e486ba1edfa0594
SSDEEP 24576:/uHtJWGs0q5KFZpr4m9BLFN41+udVlztG8OoyxH:CPsEFZN4YBLFY+udV6/oy
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

eadzagba1.duckdns.org:4877

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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-3DF634
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 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4692	powershell.exe
2408	powershell.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	MalwareBazaar.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	MalwareBazaar.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	remcos.exe

Executes dropped EXE 2 IoCs

pid	Process
4288	remcos.exe
2012	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	MalwareBazaar.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	MalwareBazaar.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1120 set thread context of 2832	1120	MalwareBazaar.exe	89
PID 4288 set thread context of 2012	4288	remcos.exe	95

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 8 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	MalwareBazaar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MalwareBazaar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1708	schtasks.exe
1424	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2408	powershell.exe
2408	powershell.exe
4692	powershell.exe
4692	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2408	powershell.exe
Token: SeDebugPrivilege	4692	powershell.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1120 wrote to memory of 2408	1120	MalwareBazaar.exe	85
PID 1120 wrote to memory of 2408	1120	MalwareBazaar.exe	85
PID 1120 wrote to memory of 2408	1120	MalwareBazaar.exe	85
PID 1120 wrote to memory of 1708	1120	MalwareBazaar.exe	87
PID 1120 wrote to memory of 1708	1120	MalwareBazaar.exe	87
PID 1120 wrote to memory of 1708	1120	MalwareBazaar.exe	87
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 1120 wrote to memory of 2832	1120	MalwareBazaar.exe	89
PID 2832 wrote to memory of 4288	2832	MalwareBazaar.exe	90
PID 2832 wrote to memory of 4288	2832	MalwareBazaar.exe	90
PID 2832 wrote to memory of 4288	2832	MalwareBazaar.exe	90
PID 4288 wrote to memory of 4692	4288	remcos.exe	91
PID 4288 wrote to memory of 4692	4288	remcos.exe	91
PID 4288 wrote to memory of 4692	4288	remcos.exe	91
PID 4288 wrote to memory of 1424	4288	remcos.exe	93
PID 4288 wrote to memory of 1424	4288	remcos.exe	93
PID 4288 wrote to memory of 1424	4288	remcos.exe	93
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95
PID 4288 wrote to memory of 2012	4288	remcos.exe	95

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\sFVKwmeK.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2408
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sFVKwmeK" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE2EE.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1708
- C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
  "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4288
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\sFVKwmeK.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4692
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sFVKwmeK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1855.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1424
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:2012

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

remcos.exe

Path C:\ProgramData\Remcos\remcos.exe
Size 1.0MB
SHA256 5e979880469bfba9dc9b850ed945530fc277fcbdd96227661972c89e700ecd1e
MD5 15ebe72d59678d3186811b138b4ad040
SHA1 ab07d7c4539dad475033cdcdec8d237ffc0409d3
SHA512 d6df3780ef988d70824d5ff534b4ad8b7ed3278490bc29f8349fa43526d028c035044c80eb1a77c8dcedb084645be978ef60874d67fd194e6e486ba1edfa0594
SSDEEP 24576:/uHtJWGs0q5KFZpr4m9BLFN41+udVlztG8OoyxH:CPsEFZN4YBLFY+udV6/oy
MD5 SHA1 SHA512 SSDEEP

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 18KB
SHA256 0014fe1b27858ce76e232e586d0a240e4a4179680e1924880109ab52c6ce2b81
MD5 8abcd7cde559130247bc938c3add8006
SHA1 079900b7edcd800d84af6d1a60efb2992fdacf49
SHA512 b0f17009f2c0eab2577fcf8d2dc3f498275bec985fecb71a1c36336c4b564ae3bf43e40bebf87f1ab53caf733fc5fcbe4164453161d2b9650e7409dd9e085074
SSDEEP 384:Vsf+B29i+QHE1ZyB6AzJk+o9o2ThK6seYLME/N03SoZ6fYSgcjEDkyQ0gdEtkKhD:Kf4kawAejo2ThNgrWS1WCED/Ce3
MD5 SHA1 SHA512 SSDEEP

Submit Download

__PSScriptPolicyTest_syn4i0nz.baz.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_syn4i0nz.baz.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

tmpE2EE.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpE2EE.tmp
Size 1KB
SHA256 b0bea7854ba4a18458b76bb3ce58894dfba3e22bdb65a4262de1c2717b61e472
MD5 9a3070087ec93f9b59d69bf0722a7fc8
SHA1 8cc18022c644ce4b18cb1c1f6701f2ef8da35450
SHA512 20b4676a09272744475342ccd734746c8bc28c46d060be775bef7ac171f7e3ad5a836035bc4e1214619d1e77ac482b6a6339897d39347fd22e1fce9b321f8cb9
MD5 SHA1 SHA512

Submit Download

memory/1120-7-0x0000000005A90000-0x0000000005AA2000-memory.dmp

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memory/1120-0-0x0000000074F4E000-0x0000000074F4F000-memory.dmp

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memory/1120-6-0x0000000005950000-0x00000000059EC000-memory.dmp

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memory/1120-1-0x0000000000B80000-0x0000000000C92000-memory.dmp

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memory/1120-8-0x0000000006A60000-0x0000000006A6E000-memory.dmp

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memory/1120-9-0x0000000006AB0000-0x0000000006B70000-memory.dmp

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memory/1120-2-0x0000000005CB0000-0x0000000006254000-memory.dmp

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memory/1120-5-0x0000000074F40000-0x00000000756F0000-memory.dmp

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memory/1120-40-0x0000000074F40000-0x00000000756F0000-memory.dmp

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memory/1120-3-0x0000000005700000-0x0000000005792000-memory.dmp

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memory/1120-4-0x0000000005690000-0x000000000569A000-memory.dmp

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memory/2012-122-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-111-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-119-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-117-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-120-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-116-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-114-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-118-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-110-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-109-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-96-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-121-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-123-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-82-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2012-83-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2408-21-0x0000000005380000-0x00000000053E6000-memory.dmp

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memory/2408-73-0x00000000071F0000-0x000000000720A000-memory.dmp

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memory/2408-64-0x0000000006120000-0x000000000613E000-memory.dmp

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memory/2408-65-0x0000000006DC0000-0x0000000006E63000-memory.dmp

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memory/2408-66-0x0000000007500000-0x0000000007B7A000-memory.dmp

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memory/2408-67-0x0000000006EB0000-0x0000000006ECA000-memory.dmp

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memory/2408-68-0x0000000006F20000-0x0000000006F2A000-memory.dmp

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memory/2408-69-0x0000000007130000-0x00000000071C6000-memory.dmp

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memory/2408-70-0x00000000070B0000-0x00000000070C1000-memory.dmp

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memory/2408-71-0x00000000070E0000-0x00000000070EE000-memory.dmp

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memory/2408-72-0x00000000070F0000-0x0000000007104000-memory.dmp

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memory/2408-19-0x00000000052E0000-0x0000000005302000-memory.dmp

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memory/2408-74-0x00000000071D0000-0x00000000071D8000-memory.dmp

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memory/2408-76-0x0000000074F40000-0x00000000756F0000-memory.dmp

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memory/2408-53-0x0000000006140000-0x0000000006172000-memory.dmp

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memory/2408-14-0x0000000002260000-0x0000000002296000-memory.dmp

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memory/2408-15-0x0000000004C70000-0x0000000005298000-memory.dmp

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memory/2408-54-0x000000006F940000-0x000000006F98C000-memory.dmp

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memory/2408-16-0x0000000074F40000-0x00000000756F0000-memory.dmp

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memory/2408-38-0x0000000005B90000-0x0000000005BAE000-memory.dmp

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memory/2408-17-0x0000000074F40000-0x00000000756F0000-memory.dmp

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memory/2408-22-0x0000000005520000-0x0000000005586000-memory.dmp

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memory/2408-33-0x0000000005590000-0x00000000058E4000-memory.dmp

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memory/2408-39-0x0000000005BC0000-0x0000000005C0C000-memory.dmp

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memory/2832-51-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2832-20-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2832-24-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2832-27-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2832-23-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4288-52-0x00000000057D0000-0x00000000057E2000-memory.dmp

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memory/4692-112-0x00000000070C0000-0x00000000070D4000-memory.dmp

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memory/4692-108-0x0000000007070000-0x0000000007081000-memory.dmp

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memory/4692-107-0x0000000006DA0000-0x0000000006E43000-memory.dmp

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memory/4692-97-0x0000000071470000-0x00000000714BC000-memory.dmp

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memory/4692-95-0x0000000006090000-0x00000000060DC000-memory.dmp

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memory/4692-93-0x00000000054E0000-0x0000000005834000-memory.dmp

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