remcos | b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
15-09-2024 10:22

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General

Target

REF 220-331.exe
Size

863KB
MD5

1c2a46d46812b1424ad44ac59b4c8d9a
SHA1

ad2822fc0804fad19c1d959f02c0011d80a7ab4c
SHA256

b3c084f9fd5fe18129978cccf6d2d2ac972d5c7db3a7378372476f535cc16b8e
SHA512

0e3107208813adb9ca79720bea24dcc333bff9c7bc084b31a7abc92ecb1d09ed7deffe9014d0b85f4154aad6499d626eec85e0f43c570954afd437151219bc39
SSDEEP

24576:D1YaXjYr93cjbHRtEmWHs7FK5WQSDndP:D13MrhcjbHRWmh7c5MDdP

Score

10^/10

remcos 3456789 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

3456789

172.93.220.148:45682

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
765-8M14I5
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

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
4128	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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	REF 220-331.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2844 set thread context of 912	2844	REF 220-331.exe	103

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 220-331.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	REF 220-331.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
5028	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2844	REF 220-331.exe
2844	REF 220-331.exe
2844	REF 220-331.exe
2844	REF 220-331.exe
4128	powershell.exe
4128	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2844	REF 220-331.exe
Token: SeDebugPrivilege	4128	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2844 wrote to memory of 4128	2844	REF 220-331.exe	97
PID 2844 wrote to memory of 4128	2844	REF 220-331.exe	97
PID 2844 wrote to memory of 4128	2844	REF 220-331.exe	97
PID 2844 wrote to memory of 5028	2844	REF 220-331.exe	99
PID 2844 wrote to memory of 5028	2844	REF 220-331.exe	99
PID 2844 wrote to memory of 5028	2844	REF 220-331.exe	99
PID 2844 wrote to memory of 3324	2844	REF 220-331.exe	101
PID 2844 wrote to memory of 3324	2844	REF 220-331.exe	101
PID 2844 wrote to memory of 3324	2844	REF 220-331.exe	101
PID 2844 wrote to memory of 2128	2844	REF 220-331.exe	102
PID 2844 wrote to memory of 2128	2844	REF 220-331.exe	102
PID 2844 wrote to memory of 2128	2844	REF 220-331.exe	102
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103
PID 2844 wrote to memory of 912	2844	REF 220-331.exe	103

C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe
"C:\Users\Admin\AppData\Local\Temp\REF 220-331.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:2844
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fBvNwiRO.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4128
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fBvNwiRO" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC7F3.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5028
- C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe
  "C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe"
  2⤵
  PID:3324
- C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe
  "C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe"
  2⤵
  PID:2128
- C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe
  "C:\Users\Admin\AppData\Local\Temp\REF 220-331.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:912

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yn3u1zgj.cwm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC7F3.tmp

Filesize
1KB

MD5
1993feb71dbdde8bf925192f8724abed

SHA1
d7f422df1b65330671f483bb554eb379d2d6ddf9

SHA256
7a167050b8a21653b6fa7c7ac2561c4e517c8e39d6c814042d71ccaa85f4b44e

SHA512
b7d2f343c189cf0bf5881e26cd3e297128ecedeaadec61bfe93b9a4da128e43cbc8be146389afd7705d812c4cff7bdffade9163b2f754c42d9770e4c44dd6922

Download Submit
memory/912-76-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-77-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/912-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2844-10-0x0000000006A70000-0x0000000006B0C000-memory.dmp

Filesize
624KB

Download
memory/2844-28-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/2844-1-0x0000000000990000-0x0000000000A6C000-memory.dmp

Filesize
880KB

Download
memory/2844-4-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/2844-2-0x00000000059E0000-0x0000000005F84000-memory.dmp

Filesize
5.6MB

Download
memory/2844-3-0x0000000005320000-0x00000000053B2000-memory.dmp

Filesize
584KB

Download
memory/2844-9-0x0000000007F60000-0x000000000801E000-memory.dmp

Filesize
760KB

Download
memory/2844-0-0x00000000749BE000-0x00000000749BF000-memory.dmp

Filesize
4KB

Download
memory/2844-8-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/2844-7-0x00000000749BE000-0x00000000749BF000-memory.dmp

Filesize
4KB

Download
memory/2844-6-0x0000000005860000-0x000000000586E000-memory.dmp

Filesize
56KB

Download
memory/2844-5-0x00000000053F0000-0x00000000053FA000-memory.dmp

Filesize
40KB

Download
memory/4128-41-0x00000000065E0000-0x00000000065FE000-memory.dmp

Filesize
120KB

Download
memory/4128-48-0x0000000006CE0000-0x0000000006D12000-memory.dmp

Filesize
200KB

Download
memory/4128-49-0x00000000711A0000-0x00000000711EC000-memory.dmp

Filesize
304KB

Download
memory/4128-59-0x0000000006C40000-0x0000000006C5E000-memory.dmp

Filesize
120KB

Download
memory/4128-60-0x00000000078F0000-0x0000000007993000-memory.dmp

Filesize
652KB

Download
memory/4128-61-0x0000000008020000-0x000000000869A000-memory.dmp

Filesize
6.5MB

Download
memory/4128-62-0x00000000079C0000-0x00000000079DA000-memory.dmp

Filesize
104KB

Download
memory/4128-63-0x0000000007A30000-0x0000000007A3A000-memory.dmp

Filesize
40KB

Download
memory/4128-64-0x0000000007C40000-0x0000000007CD6000-memory.dmp

Filesize
600KB

Download
memory/4128-65-0x0000000007BC0000-0x0000000007BD1000-memory.dmp

Filesize
68KB

Download
memory/4128-66-0x0000000007BF0000-0x0000000007BFE000-memory.dmp

Filesize
56KB

Download
memory/4128-67-0x0000000007C00000-0x0000000007C14000-memory.dmp

Filesize
80KB

Download
memory/4128-68-0x0000000007D00000-0x0000000007D1A000-memory.dmp

Filesize
104KB

Download
memory/4128-69-0x0000000007CE0000-0x0000000007CE8000-memory.dmp

Filesize
32KB

Download
memory/4128-72-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4128-42-0x0000000006BF0000-0x0000000006C3C000-memory.dmp

Filesize
304KB

Download
memory/4128-39-0x0000000006610000-0x0000000006676000-memory.dmp

Filesize
408KB

Download
memory/4128-40-0x0000000006680000-0x00000000066E6000-memory.dmp

Filesize
408KB

Download
memory/4128-38-0x00000000061C0000-0x0000000006514000-memory.dmp

Filesize
3.3MB

Download
memory/4128-27-0x0000000005E10000-0x0000000005E32000-memory.dmp

Filesize
136KB

Download
memory/4128-19-0x00000000057E0000-0x0000000005E08000-memory.dmp

Filesize
6.2MB

Download
memory/4128-18-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download
memory/4128-17-0x0000000002D70000-0x0000000002DA6000-memory.dmp

Filesize
216KB

Download
memory/4128-15-0x00000000749B0000-0x0000000075160000-memory.dmp

Filesize
7.7MB

Download