remcos | e713ca62db4c7a92ff2c6bc18b41161b87b16e81f71a932c6fe5a4d7cc0352ef

Analysis

max time kernel
149s
max time network
142s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
26/03/2026, 08:59

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General

Target
buttersmoothentery.hta
Size 703KB
Sample260326-kxp95abx3n
SHA256 e713ca62db4c7a92ff2c6bc18b41161b87b16e81f71a932c6fe5a4d7cc0352ef
MD5 b63e027272d1eca7a9ddc77e2ca58d01
SHA1 e6ede8bd5ac5caa6391bfafbbb90e05ddff42550
SHA512 7be4a1fdebe0ac7973791e0e46ac82d90577d5f9cfa37d18304411434e7104275df96e54364c06bac88c6cae9a44d592b59b9d8df2723b2b5246a9e69c2cc328
SSDEEP 96:0IRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRIRV:bpYgh5
TLSH
T155E4271B27F01CEE1FB381A2291E04648148F5BDC3E5175EE69C6E894DADBFB7942E10
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

remotehost collection discovery execution remcos rat

Malware Config

Extracted

Family

remcos

Version

7.0.5 Pro

Botnet

RemoteHost

103.83.86.16:50033
103.83.86.16:50030

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-3RQOJ2
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4944	2636	powershell.exe	79

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

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/2772-30-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4196-32-0x0000000000400000-0x0000000000482000-memory.dmp	Nirsoft
behavioral2/memory/1224-34-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1224-34-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4196-32-0x0000000000400000-0x0000000000482000-memory.dmp	WebBrowserPassView

Badlisted process makes network request 2 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
1	4944	powershell.exe
2	4944	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4944	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-747994418-3253881032-1527946131-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	rmclient.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4944 set thread context of 3400	4944	powershell.exe	83
PID 3400 set thread context of 4196	3400	CasPol.exe	84
PID 3400 set thread context of 1224	3400	CasPol.exe	85
PID 3400 set thread context of 2772	3400	CasPol.exe	87

System Location Discovery: System Language Discovery 1 TTPs 5 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	CasPol.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rmclient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rmclient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rmclient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mshta.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4196	rmclient.exe
4196	rmclient.exe
4196	rmclient.exe
4196	rmclient.exe
2772	rmclient.exe
2772	rmclient.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4944	powershell.exe
Token: SeDebugPrivilege	2772	rmclient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 1076	4944	powershell.exe	82
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 4944 wrote to memory of 3400	4944	powershell.exe	83
PID 3400 wrote to memory of 4196	3400	CasPol.exe	84
PID 3400 wrote to memory of 1224	3400	CasPol.exe	85
PID 3400 wrote to memory of 4664	3400	CasPol.exe	86
PID 3400 wrote to memory of 2772	3400	CasPol.exe	87

C:\Windows\SysWOW64\mshta.exe
C:\Windows\SysWOW64\mshta.exe "C:\Users\Admin\AppData\Local\Temp\buttersmoothentery.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
1⤵
- System Location Discovery: System Language Discovery
PID:5084

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -Command "IEX $env:INTERNAL_DB_CACHE;[Environment]::SetEnvironmentVariable('INTERNAL_DB_CACHE',$null,'User')"
1⤵
- Process spawned unexpected child process
- Badlisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
  2⤵
  PID:1076
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3400
- - C:\Windows\SysWOW64\rmclient.exe
    /stext "C:\Users\Admin\AppData\Local\Temp\wkslfhgrxcjcvxeflafcjogvy"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4196
- - C:\Windows\SysWOW64\rmclient.exe
    /stext "C:\Users\Admin\AppData\Local\Temp\geydyzrslkbpflsjukseubamzhth"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1224
- - C:\Windows\SysWOW64\rmclient.exe
    /stext "C:\Users\Admin\AppData\Local\Temp\rylozjcmzstuisonlvmfxgvvioliulx"
    3⤵
    PID:4664
- - C:\Windows\SysWOW64\rmclient.exe
    /stext "C:\Users\Admin\AppData\Local\Temp\rylozjcmzstuisonlvmfxgvvioliulx"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2772

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

__PSScriptPolicyTest_3il4wkme.53z.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3il4wkme.53z.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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wkslfhgrxcjcvxeflafcjogvy

Path C:\Users\Admin\AppData\Local\Temp\wkslfhgrxcjcvxeflafcjogvy
Size 2B
SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
MD5 f3b25701fe362ec84616a93a45ce9998
SHA1 d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA512 98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
MD5 SHA1 SHA512

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memory/1224-24-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1224-34-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/2772-30-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/3400-17-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-49-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-12-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-13-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-64-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-63-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-59-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-58-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-16-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-22-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-21-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-23-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-53-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-54-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-48-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-44-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-43-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/3400-42-0x0000000001950000-0x00000000019B4000-memory.dmp

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memory/3400-36-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/3400-40-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/3400-39-0x0000000010000000-0x0000000010019000-memory.dmp

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memory/3400-41-0x0000000000400000-0x0000000000483000-memory.dmp

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memory/4196-32-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4664-25-0x0000000000420000-0x0000000000444000-memory.dmp

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memory/4944-0-0x000002087D170000-0x000002087D180000-memory.dmp

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memory/4944-2-0x000002087D140000-0x000002087D162000-memory.dmp

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memory/4944-11-0x000002087D7D0000-0x000002087D7DA000-memory.dmp

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memory/4944-9-0x000002087D170000-0x000002087D180000-memory.dmp

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memory/4944-10-0x000002087D6B0000-0x000002087D7D2000-memory.dmp

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memory/4944-19-0x0000020864CC0000-0x0000020864D6F000-memory.dmp

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memory/4944-20-0x0000020864A70000-0x0000020864A82000-memory.dmp

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memory/4944-18-0x00000208631F0000-0x00000208631FC000-memory.dmp

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memory/4944-1-0x000002087D170000-0x000002087D180000-memory.dmp

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