remcos | 76c3b1e7151a1048d4a802f857c3efc2dde24a73698111bcc1dc9907faabc9b8

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
09/07/2024, 09:16

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General

Target
47dc41619064c10d3fa9e41b89a2de8a.exe
Size 1.1MB
Sample240709-k8fj3ayfrb
SHA256 76c3b1e7151a1048d4a802f857c3efc2dde24a73698111bcc1dc9907faabc9b8
MD5 47dc41619064c10d3fa9e41b89a2de8a
SHA1 0c2bc89dccdbed10794423021a3ccdc539dcf2fa
SHA512 3868ba416d6c6198e82a72f0a130066e7404fa1c7d05478d7aaf7a41e9f3e5764f3ed870c505dd8e2e84eccef0f759e1f3f6dc49bebf683ca4a561720b23f9ce
SSDEEP 24576:531Rdftm23gsxr5TzGnkjUhTEUejoKM/6H02sO:5FRd3FN53GkufejHMojs
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost collection persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

147.124.212.130:2405

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-KX6RF7
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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4756-52-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3984-51-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/4756-52-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/632-56-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3984-51-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Checks computer location settings 2 TTPs 1 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-1-5-21-661257284-3186977026-4220467887-1000\Control Panel\International\Geo\Nation	47dc41619064c10d3fa9e41b89a2de8a.exe

Executes dropped EXE 6 IoCs

pid	Process
1008	remcos.exe
4580	remcos.exe
1976	remcos.exe
3984	remcos.exe
4756	remcos.exe
632	remcos.exe

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

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-661257284-3186977026-4220467887-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	remcos.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-661257284-3186977026-4220467887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-KX6RF7 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	47dc41619064c10d3fa9e41b89a2de8a.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-661257284-3186977026-4220467887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-KX6RF7 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 5 IoCs

description	pid	Process	procid_target
PID 2440 set thread context of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 1008 set thread context of 1976	1008	remcos.exe	96
PID 1976 set thread context of 3984	1976	remcos.exe	97
PID 1976 set thread context of 4756	1976	remcos.exe	98
PID 1976 set thread context of 632	1976	remcos.exe	99

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1008	remcos.exe
1008	remcos.exe
3984	remcos.exe
3984	remcos.exe
632	remcos.exe
632	remcos.exe
3984	remcos.exe
3984	remcos.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
1976	remcos.exe
1976	remcos.exe
1976	remcos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1008	remcos.exe
Token: SeDebugPrivilege	632	remcos.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 2440 wrote to memory of 440	2440	47dc41619064c10d3fa9e41b89a2de8a.exe	93
PID 440 wrote to memory of 1008	440	47dc41619064c10d3fa9e41b89a2de8a.exe	94
PID 440 wrote to memory of 1008	440	47dc41619064c10d3fa9e41b89a2de8a.exe	94
PID 440 wrote to memory of 1008	440	47dc41619064c10d3fa9e41b89a2de8a.exe	94
PID 1008 wrote to memory of 4580	1008	remcos.exe	95
PID 1008 wrote to memory of 4580	1008	remcos.exe	95
PID 1008 wrote to memory of 4580	1008	remcos.exe	95
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1008 wrote to memory of 1976	1008	remcos.exe	96
PID 1976 wrote to memory of 3984	1976	remcos.exe	97
PID 1976 wrote to memory of 3984	1976	remcos.exe	97
PID 1976 wrote to memory of 3984	1976	remcos.exe	97
PID 1976 wrote to memory of 3984	1976	remcos.exe	97
PID 1976 wrote to memory of 4756	1976	remcos.exe	98
PID 1976 wrote to memory of 4756	1976	remcos.exe	98
PID 1976 wrote to memory of 4756	1976	remcos.exe	98
PID 1976 wrote to memory of 4756	1976	remcos.exe	98
PID 1976 wrote to memory of 632	1976	remcos.exe	99
PID 1976 wrote to memory of 632	1976	remcos.exe	99
PID 1976 wrote to memory of 632	1976	remcos.exe	99
PID 1976 wrote to memory of 632	1976	remcos.exe	99

C:\Users\Admin\AppData\Local\Temp\47dc41619064c10d3fa9e41b89a2de8a.exe
"C:\Users\Admin\AppData\Local\Temp\47dc41619064c10d3fa9e41b89a2de8a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\47dc41619064c10d3fa9e41b89a2de8a.exe
  "C:\Users\Admin\AppData\Local\Temp\47dc41619064c10d3fa9e41b89a2de8a.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:440
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1008
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      PID:4580
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:1976
    - - C:\ProgramData\Remcos\remcos.exe
        
        C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\tukevhdngbpepgeubqrbrzgsuuarnj"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        
        PID:3984
    - - C:\ProgramData\Remcos\remcos.exe
        
        C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\eopowavpujhjsutysbmvumabvasaguplm"
        5⤵
        Executes dropped EXE
        Accesses Microsoft Outlook accounts
        
        PID:4756
    - - C:\ProgramData\Remcos\remcos.exe
        
        C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\oquhp"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:632

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4272,i,6959856223548986108,4217696995639198458,262144 --variations-seed-version --mojo-platform-channel-handle=4176 /prefetch:8
1⤵
PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

remcos.exe

Path C:\ProgramData\Remcos\remcos.exe
Size 1.1MB
SHA256 76c3b1e7151a1048d4a802f857c3efc2dde24a73698111bcc1dc9907faabc9b8
MD5 47dc41619064c10d3fa9e41b89a2de8a
SHA1 0c2bc89dccdbed10794423021a3ccdc539dcf2fa
SHA512 3868ba416d6c6198e82a72f0a130066e7404fa1c7d05478d7aaf7a41e9f3e5764f3ed870c505dd8e2e84eccef0f759e1f3f6dc49bebf683ca4a561720b23f9ce
SSDEEP 24576:531Rdftm23gsxr5TzGnkjUhTEUejoKM/6H02sO:5FRd3FN53GkufejHMojs
MD5 SHA1 SHA512 SSDEEP

Submit Download

tukevhdngbpepgeubqrbrzgsuuarnj

Path C:\Users\Admin\AppData\Local\Temp\tukevhdngbpepgeubqrbrzgsuuarnj
Size 4KB
SHA256 0c38ee44dc9eb4f240b667240c115fed88091bc04001d909b841ad8570738467
MD5 be3be306ce816aa6030d9bfec1df34b0
SHA1 66b10c4578245de0f78c445119e67f0bfb84bbf3
SHA512 b9aee88755e6e239c7aa1d3c39488722786c1faa01de3c70cf822059f461ca277965b8dd50773e015444a83cc69b5f31c6379957de54a5073ef8799b26a12bcc
SSDEEP 48:wvvv0lxfvvclxfdvv0lxBvv0lxakvv0l7:mvUxvcp1vUPvUbvU7
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/440-14-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/440-28-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/440-16-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/440-12-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/440-11-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/632-53-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/632-55-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/632-56-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/1008-38-0x00000000746B0000-0x0000000074E60000-memory.dmp

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memory/1008-30-0x00000000746B0000-0x0000000074E60000-memory.dmp

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memory/1008-29-0x00000000746BE000-0x00000000746BF000-memory.dmp

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memory/1976-40-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-72-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/1976-81-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-80-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-79-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-78-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-35-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-36-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-37-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-76-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-39-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-77-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-42-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-41-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-44-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-75-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-74-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-73-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1976-71-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/1976-68-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/2440-4-0x00000000055C0000-0x00000000055CA000-memory.dmp

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memory/2440-5-0x0000000074DD0000-0x0000000075580000-memory.dmp

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memory/2440-10-0x0000000011270000-0x000000001130C000-memory.dmp

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memory/2440-8-0x00000000067A0000-0x00000000067AC000-memory.dmp

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memory/2440-7-0x000000000A950000-0x000000000A958000-memory.dmp

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memory/2440-0-0x0000000074DDE000-0x0000000074DDF000-memory.dmp

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memory/2440-2-0x0000000005AF0000-0x0000000006094000-memory.dmp

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memory/2440-3-0x00000000055E0000-0x0000000005672000-memory.dmp

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memory/2440-6-0x0000000008180000-0x000000000819A000-memory.dmp

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memory/2440-9-0x0000000006A20000-0x0000000006AE0000-memory.dmp

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memory/2440-1-0x0000000000A90000-0x0000000000BAA000-memory.dmp

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memory/2440-17-0x0000000074DD0000-0x0000000075580000-memory.dmp

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memory/3984-45-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/3984-51-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/3984-49-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4756-52-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4756-47-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/4756-50-0x0000000000400000-0x0000000000462000-memory.dmp

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