remcos | 9d5fab129071f6d09f1d45e80991c60459680aab2e6591f8b2cec9909e37a5eb

General

Target

WO-663071SabiyaPowerStationProject.vbs
Size

2KB
MD5

29e1bb22ea494b25e915d1b72b50bfc8
SHA1

37b7b92709d22bfe4ae4c18258c3cf6751ae53d2
SHA256

9d5fab129071f6d09f1d45e80991c60459680aab2e6591f8b2cec9909e37a5eb
SHA512

5ac2953bf6868f7a99bcd97efd75d5fe679649ed7b796918e23f7f90a2441715034594c2080f02a2e80c22153b04a14fa3650bd2f8f732f91808864bbe8d6e30

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

162.251.122.87:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-UOMZ21
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
Remcos family
remcos

Blocklisted process makes network request 3 IoCs

flow	pid	Process
4	3532	WScript.exe
6	3532	WScript.exe
11	3532	WScript.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\AutoRunScript.lnk	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3820	x.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3820 set thread context of 4672	3820	x.exe	87

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
5068	powershell.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	x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	aspnet_compiler.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5068	powershell.exe
5068	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5068	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4672	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3532 wrote to memory of 5068	3532	WScript.exe	84
PID 3532 wrote to memory of 5068	3532	WScript.exe	84
PID 5068 wrote to memory of 3820	5068	powershell.exe	86
PID 5068 wrote to memory of 3820	5068	powershell.exe	86
PID 5068 wrote to memory of 3820	5068	powershell.exe	86
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87
PID 3820 wrote to memory of 4672	3820	x.exe	87

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\WO-663071SabiyaPowerStationProject.vbs"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:3532
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy RemoteSigned -File "C:\Temp\dddddd.ps1"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Users\Admin\AppData\Local\Temp\x.exe
    "C:\Users\Admin\AppData\Local\Temp\x.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3820
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:4672

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
158300f8c2a1eab67f6f1d3aa759190b

SHA1
1d8c1ed3c73dff5b4dbf76ce6afd8554fdbce39d

SHA256
429aabc2d1079eee575c279bf1c7ee728673d7c3100aef4aed514f73daab1382

SHA512
d997bbc616661e12e6862c7b9f9989102095ae2863acf6af302888425ab9831d7c5449da2b2b0ccc5c4bd7afa94980883aa1fc95e1514dc053832b110678409e

Download Submit
C:\Temp\dddddd.ps1

Filesize
701KB

MD5
cf9811311721d98ced8580790789851b

SHA1
5d90e48e9508e7d01b2472f818b42570e1252fdb

SHA256
586bb76a51dc382f8df76aebaedd944f262fc2cb0b5d328f069a8708f2a6679e

SHA512
dc8aaf19002413b0bc9f6374b6da913e0f5e995922fcb1390c4b65aed3503a1fdb19870a84c0d8ab785992b9f58849520a4b2535b22bd67907a12efb0bc553a0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jsbhqybk.vpq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\x.exe

Filesize
526KB

MD5
2c248753c0d81181227bb95c0bc614cf

SHA1
86a24f456da864a009edbc5b3a95877fcb9479a4

SHA256
65ec50ac4d13e4386d497e33d20d5e679a0460727795eb3e8a2f7dfecdf8c4f3

SHA512
f22685e9da58f9a044799a527cb5a9e1da3067875ebc8e4fd4200a4647918a5b1241b4c05aa964b8615ca8f03a99006da69d30935dcee80d2959183daf29fa40

Download Submit
memory/3820-39-0x0000000000820000-0x00000000008AA000-memory.dmp

Filesize
552KB

Download
memory/4672-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-88-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-89-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4672-72-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/5068-11-0x00007FFE0C423000-0x00007FFE0C425000-memory.dmp

Filesize
8KB

Download
memory/5068-12-0x00000184EE1C0000-0x00000184EE1E2000-memory.dmp

Filesize
136KB

Download
memory/5068-23-0x00007FFE0C420000-0x00007FFE0CEE1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-22-0x00007FFE0C420000-0x00007FFE0CEE1000-memory.dmp

Filesize
10.8MB

Download
memory/5068-38-0x00007FFE0C420000-0x00007FFE0CEE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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