remcos | 8fd7b8dd8031bba418ae41089854aeba5cf9ee3a171d2cc8db05d95b692b83c8

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-11-2024 23:41

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General

Target

B1DA0BD777067CA89B28FC4ADC81A483.exe
Size

1.0MB
MD5

b1da0bd777067ca89b28fc4adc81a483
SHA1

47af480b6704e2c61ae2e24060fbe86d3971c176
SHA256

8fd7b8dd8031bba418ae41089854aeba5cf9ee3a171d2cc8db05d95b692b83c8
SHA512

68ef2a70ba4f74f69d7bf47d76c92dbcf70261bc64b1569561662afaa90ca5d4119c97e7589cb0d857ad986d2ef3ff334ed02d230a529f79a5c9c8d9e761689f
SSDEEP

24576:Mg/fQ/hv309BvUDV2xogQA3O0jO0biPeX+Y5PTwCPiqLa:zAF303vUDESA+0jO0BOY58C5La

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

www.caampass.com:5577

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-RPV3M2
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
Remcos family
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
4520	powershell.exe
1548	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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	B1DA0BD777067CA89B28FC4ADC81A483.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2104 set thread context of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106

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 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	B1DA0BD777067CA89B28FC4ADC81A483.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	B1DA0BD777067CA89B28FC4ADC81A483.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
2444	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2104	B1DA0BD777067CA89B28FC4ADC81A483.exe
2104	B1DA0BD777067CA89B28FC4ADC81A483.exe
2104	B1DA0BD777067CA89B28FC4ADC81A483.exe
1548	powershell.exe
4520	powershell.exe
2104	B1DA0BD777067CA89B28FC4ADC81A483.exe
4520	powershell.exe
1548	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe
Token: SeDebugPrivilege	1548	powershell.exe
Token: SeDebugPrivilege	4520	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3780	B1DA0BD777067CA89B28FC4ADC81A483.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2104 wrote to memory of 1548	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	100
PID 2104 wrote to memory of 1548	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	100
PID 2104 wrote to memory of 1548	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	100
PID 2104 wrote to memory of 4520	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	102
PID 2104 wrote to memory of 4520	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	102
PID 2104 wrote to memory of 4520	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	102
PID 2104 wrote to memory of 2444	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	104
PID 2104 wrote to memory of 2444	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	104
PID 2104 wrote to memory of 2444	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	104
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106
PID 2104 wrote to memory of 3780	2104	B1DA0BD777067CA89B28FC4ADC81A483.exe	106

C:\Users\Admin\AppData\Local\Temp\B1DA0BD777067CA89B28FC4ADC81A483.exe
"C:\Users\Admin\AppData\Local\Temp\B1DA0BD777067CA89B28FC4ADC81A483.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2104
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\B1DA0BD777067CA89B28FC4ADC81A483.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1548
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eJhvEJDc.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4520
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eJhvEJDc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF8C7.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2444
- C:\Users\Admin\AppData\Local\Temp\B1DA0BD777067CA89B28FC4ADC81A483.exe
  "C:\Users\Admin\AppData\Local\Temp\B1DA0BD777067CA89B28FC4ADC81A483.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3780

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
b300bddf9fffc1da79a6456001da3c26

SHA1
81041e800af565e996e23af5563604f3322f41c8

SHA256
ee3555ee99a5aa710d396d2cfb0a9bd47c7e5fdc30375d25628556b2fdf03cc6

SHA512
959dd499c52ff245c846a9d783dd89ea0181f9d2fdbb8e236e800f6a96b064ca538756917af6621a6539212ec8ce357b4473fcdd13d1b59900f0c5c9da63da29

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rczesumw.aqr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF8C7.tmp

Filesize
1KB

MD5
d08a6379909ff6692fc95ae14dd088e7

SHA1
d48373bf726668e9a51c1b2fd26c5527465c9401

SHA256
f99617f9c5be4c56845cdeb1329a1c757abf63640422639bfe3bacf71815c451

SHA512
fa9d28665b83cd089f12ce0217d3a387245bf49361360cc0de923a6622ae7624f09cbd96b5d68ab853d46c99681c2d774d14d8b736b5252914094de289d0dfb1

Download Submit
memory/1548-90-0x0000000007CF0000-0x0000000007D04000-memory.dmp

Filesize
80KB

Download
memory/1548-51-0x0000000006180000-0x00000000064D4000-memory.dmp

Filesize
3.3MB

Download
memory/1548-98-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/1548-88-0x0000000007CB0000-0x0000000007CC1000-memory.dmp

Filesize
68KB

Download
memory/1548-85-0x0000000007AB0000-0x0000000007ACA000-memory.dmp

Filesize
104KB

Download
memory/1548-83-0x0000000007780000-0x0000000007823000-memory.dmp

Filesize
652KB

Download
memory/1548-81-0x0000000007760000-0x000000000777E000-memory.dmp

Filesize
120KB

Download
memory/1548-15-0x0000000002E70000-0x0000000002EA6000-memory.dmp

Filesize
216KB

Download
memory/1548-16-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/1548-17-0x0000000005870000-0x0000000005E98000-memory.dmp

Filesize
6.2MB

Download
memory/1548-18-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/1548-19-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/1548-61-0x0000000006D60000-0x0000000006D92000-memory.dmp

Filesize
200KB

Download
memory/1548-62-0x0000000075870000-0x00000000758BC000-memory.dmp

Filesize
304KB

Download
memory/1548-25-0x0000000006110000-0x0000000006176000-memory.dmp

Filesize
408KB

Download
memory/1548-23-0x0000000006000000-0x0000000006022000-memory.dmp

Filesize
136KB

Download
memory/1548-24-0x00000000060A0000-0x0000000006106000-memory.dmp

Filesize
408KB

Download
memory/2104-10-0x000000000A2E0000-0x000000000A3A0000-memory.dmp

Filesize
768KB

Download
memory/2104-5-0x0000000004B70000-0x0000000004B7A000-memory.dmp

Filesize
40KB

Download
memory/2104-1-0x0000000000070000-0x000000000017C000-memory.dmp

Filesize
1.0MB

Download
memory/2104-6-0x0000000004E30000-0x0000000004ECC000-memory.dmp

Filesize
624KB

Download
memory/2104-2-0x0000000005190000-0x0000000005734000-memory.dmp

Filesize
5.6MB

Download
memory/2104-0-0x0000000074FEE000-0x0000000074FEF000-memory.dmp

Filesize
4KB

Download
memory/2104-53-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/2104-7-0x0000000005160000-0x000000000517C000-memory.dmp

Filesize
112KB

Download
memory/2104-8-0x0000000074FEE000-0x0000000074FEF000-memory.dmp

Filesize
4KB

Download
memory/2104-9-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/2104-3-0x0000000004BE0000-0x0000000004C72000-memory.dmp

Filesize
584KB

Download
memory/2104-4-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/3780-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-126-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-127-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-119-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-118-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-110-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-111-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3780-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4520-92-0x0000000007900000-0x0000000007908000-memory.dmp

Filesize
32KB

Download
memory/4520-97-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/4520-91-0x0000000007920000-0x000000000793A000-memory.dmp

Filesize
104KB

Download
memory/4520-21-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download
memory/4520-89-0x0000000007810000-0x000000000781E000-memory.dmp

Filesize
56KB

Download
memory/4520-56-0x0000000006380000-0x00000000063CC000-memory.dmp

Filesize
304KB

Download
memory/4520-87-0x0000000007860000-0x00000000078F6000-memory.dmp

Filesize
600KB

Download
memory/4520-86-0x0000000007650000-0x000000000765A000-memory.dmp

Filesize
40KB

Download
memory/4520-84-0x0000000007C20000-0x000000000829A000-memory.dmp

Filesize
6.5MB

Download
memory/4520-54-0x00000000062B0000-0x00000000062CE000-memory.dmp

Filesize
120KB

Download
memory/4520-72-0x0000000075870000-0x00000000758BC000-memory.dmp

Filesize
304KB

Download
memory/4520-20-0x0000000074FE0000-0x0000000075790000-memory.dmp

Filesize
7.7MB

Download