remcos | fd615fdf86a726bb8ad810209e149deee8b4d1df51a03d6e895442b903d18136

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
24-12-2024 09:17

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General

Target

REF 2206E43460.scr
Size

929KB
MD5

bff820244b82a7621c4cacce8180e4ce
SHA1

59b3926046276a70e7914f636643d8f8dbd7bdd7
SHA256

606865b5ac36472607a3869745888546335913565f1392ebfbc1d0486692fc98
SHA512

5ec5b0835668893a33442a86ee61e59b3b5b882d10f1b791caaa85d5fbf072e78a22ed0f4110728bb365c49983997130027f714fb1258c5d7ee2fa7359d260e6
SSDEEP

12288:nqvc55OHTDPDgjHnYkFvsxL/6RugXx72vusEj1uD7qzANQ3HzG2S4kv50WPvB26J:ScXOPD0H3Ei/om/qLT0WP803II

Score

10^/10

remcos hdyebf discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

hdyebf

decmainserver.webredirect.org:45682

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
46875-RPQWNM
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
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
1532	powershell.exe

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	REF 2206E43460.scr

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4740 set thread context of 1536	4740	REF 2206E43460.scr	93

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	REF 2206E43460.scr
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	REF 2206E43460.scr

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
4052	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1532	powershell.exe
1532	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1532	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4740 wrote to memory of 1532	4740	REF 2206E43460.scr	89
PID 4740 wrote to memory of 1532	4740	REF 2206E43460.scr	89
PID 4740 wrote to memory of 1532	4740	REF 2206E43460.scr	89
PID 4740 wrote to memory of 4052	4740	REF 2206E43460.scr	91
PID 4740 wrote to memory of 4052	4740	REF 2206E43460.scr	91
PID 4740 wrote to memory of 4052	4740	REF 2206E43460.scr	91
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93
PID 4740 wrote to memory of 1536	4740	REF 2206E43460.scr	93

C:\Users\Admin\AppData\Local\Temp\REF 2206E43460.scr
"C:\Users\Admin\AppData\Local\Temp\REF 2206E43460.scr" /S
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4740
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\JNsZiLEJR.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1532
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JNsZiLEJR" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD939.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4052
- C:\Users\Admin\AppData\Local\Temp\REF 2206E43460.scr
  "C:\Users\Admin\AppData\Local\Temp\REF 2206E43460.scr"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1536

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

Query Registry

T1012

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\__PSScriptPolicyTest_nchztzxn.f0m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD939.tmp

Filesize
1KB

MD5
ee34a97f35d3cb9f835198a3c83cacfe

SHA1
579fd1fcb7fcca41f4839edde629cdbd31f8a1ae

SHA256
1c6d0305fd66a67789796287ee95562b5bcaf8feef35b69170eb588dbd16b323

SHA512
12fdd569f1012c5f766b79d3e203e787ddd3fd1fff9c587eb42b83a54291690c1eb9e570776320718acdd3860bf9dc9fc553682772db69f0da9257d9aac4eb23

Download Submit
memory/1532-52-0x000000006F050000-0x000000006F09C000-memory.dmp

Filesize
304KB

Download
memory/1532-66-0x0000000007730000-0x000000000773A000-memory.dmp

Filesize
40KB

Download
memory/1532-23-0x00000000055F0000-0x0000000005612000-memory.dmp

Filesize
136KB

Download
memory/1532-67-0x0000000007940000-0x00000000079D6000-memory.dmp

Filesize
600KB

Download
memory/1532-51-0x0000000007360000-0x0000000007392000-memory.dmp

Filesize
200KB

Download
memory/1532-65-0x00000000076C0000-0x00000000076DA000-memory.dmp

Filesize
104KB

Download
memory/1532-64-0x0000000007D00000-0x000000000837A000-memory.dmp

Filesize
6.5MB

Download
memory/1532-69-0x00000000078F0000-0x00000000078FE000-memory.dmp

Filesize
56KB

Download
memory/1532-62-0x0000000006940000-0x000000000695E000-memory.dmp

Filesize
120KB

Download
memory/1532-68-0x00000000078C0000-0x00000000078D1000-memory.dmp

Filesize
68KB

Download
memory/1532-72-0x0000000007A80000-0x0000000007A88000-memory.dmp

Filesize
32KB

Download
memory/1532-19-0x0000000005660000-0x0000000005C88000-memory.dmp

Filesize
6.2MB

Download
memory/1532-21-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/1532-20-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/1532-63-0x00000000075A0000-0x0000000007643000-memory.dmp

Filesize
652KB

Download
memory/1532-18-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/1532-39-0x0000000005DE0000-0x0000000006134000-memory.dmp

Filesize
3.3MB

Download
memory/1532-70-0x0000000007A40000-0x0000000007A54000-memory.dmp

Filesize
80KB

Download
memory/1532-71-0x0000000007A90000-0x0000000007AAA000-memory.dmp

Filesize
104KB

Download
memory/1532-17-0x0000000002A90000-0x0000000002AC6000-memory.dmp

Filesize
216KB

Download
memory/1532-25-0x0000000005D70000-0x0000000005DD6000-memory.dmp

Filesize
408KB

Download
memory/1532-24-0x0000000005D00000-0x0000000005D66000-memory.dmp

Filesize
408KB

Download
memory/1532-42-0x0000000006380000-0x000000000639E000-memory.dmp

Filesize
120KB

Download
memory/1532-43-0x00000000063C0000-0x000000000640C000-memory.dmp

Filesize
304KB

Download
memory/1532-75-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/1536-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1536-84-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4740-10-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4740-45-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4740-12-0x000000000ABF0000-0x000000000AC8C000-memory.dmp

Filesize
624KB

Download
memory/4740-11-0x00000000083C0000-0x0000000008480000-memory.dmp

Filesize
768KB

Download
memory/4740-9-0x00000000746DE000-0x00000000746DF000-memory.dmp

Filesize
4KB

Download
memory/4740-8-0x0000000008300000-0x000000000831E000-memory.dmp

Filesize
120KB

Download
memory/4740-7-0x0000000005A00000-0x0000000005A18000-memory.dmp

Filesize
96KB

Download
memory/4740-6-0x0000000005410000-0x000000000541A000-memory.dmp

Filesize
40KB

Download
memory/4740-5-0x00000000746D0000-0x0000000074E80000-memory.dmp

Filesize
7.7MB

Download
memory/4740-4-0x0000000005510000-0x0000000005586000-memory.dmp

Filesize
472KB

Download
memory/4740-3-0x0000000005470000-0x0000000005502000-memory.dmp

Filesize
584KB

Download
memory/4740-2-0x0000000005A20000-0x0000000005FC4000-memory.dmp

Filesize
5.6MB

Download
memory/4740-1-0x0000000000940000-0x0000000000A2E000-memory.dmp

Filesize
952KB

Download
memory/4740-0-0x00000000746DE000-0x00000000746DF000-memory.dmp

Filesize
4KB

Download