remcos | 5dbbaa22b757de07d0fb4b665b1863811a2e80498b5265ee903c3998a8684b6d

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
02/08/2024, 14:07

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General

Target

MalwareBazaar.exe
Size

1.4MB
MD5

f1176e8d6662faadee1e912fc2da0147
SHA1

d25d2f1d83d48bb502297a049d7efbbb54b07967
SHA256

5dbbaa22b757de07d0fb4b665b1863811a2e80498b5265ee903c3998a8684b6d
SHA512

dc4ebbd293f29bd4b459895e3d58237b21c3b5bf82968d942301ac059dbd4ddb41bd15c75da33b1657678b6351a90049c5a3bb0b71b9887f8dbe24669bfdaeb6
SSDEEP

24576:5f+6UNxk0J9o03BxVtNpTZXJ8PFAx7Yfs1KyyL317qejO7a/eSW6g:5G6U80JK03BxVtTIPFA8VNkolW6

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

eadzagba1.duckdns.org:4877

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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-3DF634
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

Executes dropped EXE 2 IoCs

pid	Process
2724	remcos.exe
1876	remcos.exe

Loads dropped DLL 2 IoCs

pid	Process
2772	MalwareBazaar.exe
2772	MalwareBazaar.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	MalwareBazaar.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	MalwareBazaar.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3DF634 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1904 set thread context of 2772	1904	MalwareBazaar.exe	33
PID 2724 set thread context of 1876	2724	remcos.exe	35

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 4 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	MalwareBazaar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MalwareBazaar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1904	MalwareBazaar.exe
1904	MalwareBazaar.exe
1904	MalwareBazaar.exe
1904	MalwareBazaar.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1904	MalwareBazaar.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 2712	1904	MalwareBazaar.exe	31
PID 1904 wrote to memory of 2712	1904	MalwareBazaar.exe	31
PID 1904 wrote to memory of 2712	1904	MalwareBazaar.exe	31
PID 1904 wrote to memory of 2712	1904	MalwareBazaar.exe	31
PID 1904 wrote to memory of 2684	1904	MalwareBazaar.exe	32
PID 1904 wrote to memory of 2684	1904	MalwareBazaar.exe	32
PID 1904 wrote to memory of 2684	1904	MalwareBazaar.exe	32
PID 1904 wrote to memory of 2684	1904	MalwareBazaar.exe	32
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 1904 wrote to memory of 2772	1904	MalwareBazaar.exe	33
PID 2772 wrote to memory of 2724	2772	MalwareBazaar.exe	34
PID 2772 wrote to memory of 2724	2772	MalwareBazaar.exe	34
PID 2772 wrote to memory of 2724	2772	MalwareBazaar.exe	34
PID 2772 wrote to memory of 2724	2772	MalwareBazaar.exe	34
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35
PID 2724 wrote to memory of 1876	2724	remcos.exe	35

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
  "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  PID:2712
- C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
  "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  PID:2684
- C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
  "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2724
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:1876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Remcos\remcos.exe

Filesize
1.4MB

MD5
f1176e8d6662faadee1e912fc2da0147

SHA1
d25d2f1d83d48bb502297a049d7efbbb54b07967

SHA256
5dbbaa22b757de07d0fb4b665b1863811a2e80498b5265ee903c3998a8684b6d

SHA512
dc4ebbd293f29bd4b459895e3d58237b21c3b5bf82968d942301ac059dbd4ddb41bd15c75da33b1657678b6351a90049c5a3bb0b71b9887f8dbe24669bfdaeb6

Download Submit
memory/1876-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-67-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-50-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1876-55-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-57-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-65-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-60-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1876-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1904-1-0x0000000000190000-0x0000000000304000-memory.dmp

Filesize
1.5MB

Download
memory/1904-2-0x00000000741E0000-0x00000000748CE000-memory.dmp

Filesize
6.9MB

Download
memory/1904-20-0x00000000741E0000-0x00000000748CE000-memory.dmp

Filesize
6.9MB

Download
memory/1904-0-0x00000000741EE000-0x00000000741EF000-memory.dmp

Filesize
4KB

Download
memory/1904-5-0x0000000005180000-0x0000000005240000-memory.dmp

Filesize
768KB

Download
memory/1904-4-0x00000000005B0000-0x00000000005BE000-memory.dmp

Filesize
56KB

Download
memory/1904-3-0x00000000003C0000-0x00000000003D2000-memory.dmp

Filesize
72KB

Download
memory/2724-33-0x0000000000EC0000-0x0000000001034000-memory.dmp

Filesize
1.5MB

Download
memory/2724-32-0x00000000741EE000-0x00000000741EF000-memory.dmp

Filesize
4KB

Download
memory/2772-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-6-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2772-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-8-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-9-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-11-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-10-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2772-7-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download