remcos | 208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
18/05/2024, 19:31

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General

Target
208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
Size 1.4MB
Sample240518-x8f7tabf61
SHA256 208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb
MD5 8e6f0d879ea918a6d826a4b12acc2eeb
SHA1 d07ca4057fedf16d652cbc16a107e53a280a448d
SHA512 07f45dcf9829c17b3d8c9eaaa06452429f4f555036edc6d894c81b585cfe6c0f6f6a717a2f48d50bf6a7d2cabd82fd27511387a7222a57f2c7cf7eac6730dffe
SSDEEP 24576:0D39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjm:0p7E+QrFUBgq2I
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos host persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Host

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

detects Windows exceutables potentially bypassing UAC using eventvwr.exe 1 IoCs

resource	yara_rule
behavioral2/memory/4236-34-0x0000000000820000-0x0000000000837000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe

Executes dropped EXE 2 IoCs

pid	Process
4716	sbietrcl.exe
4236	sbietrcl.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4716 set thread context of 4236	4716	sbietrcl.exe	94

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
4716	sbietrcl.exe
4716	sbietrcl.exe
4716	sbietrcl.exe
4716	sbietrcl.exe
4716	sbietrcl.exe
4716	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
Token: SeDebugPrivilege	4716	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4856 wrote to memory of 4716	4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe	93
PID 4856 wrote to memory of 4716	4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe	93
PID 4856 wrote to memory of 4716	4856	208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe	93
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94
PID 4716 wrote to memory of 4236	4716	sbietrcl.exe	94

C:\Users\Admin\AppData\Local\Temp\208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe
"C:\Users\Admin\AppData\Local\Temp\208e3c9fd3400370cb99f1786e2588201b5baafa8252e6fe986f2a307c401cbb.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4856
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4716
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    PID:4236

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

sbietrcl.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
Size 1.5MB
SHA256 380f4aab9a40105bd0ed5799e1135308443bdf5907c23d2260a469e4445da8f9
MD5 b755385d8e08db5e4381c78e45f299d0
SHA1 75f39bc175e74041293125db30277f7efcc6799e
SHA512 b4a662984586f7496bf68dc774b9638612752c54a2927022fc5deabfe97a2848a9a9931912c13b81b9d5f53b7cc8cb06efae83273e7497b38b02d05a2b932563
SSDEEP 24576:QD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjw7:Qp7E+QrFUBgq2S7
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4236-34-0x0000000000820000-0x0000000000837000-memory.dmp

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memory/4716-29-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4716-38-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4716-32-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4716-31-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4716-30-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4856-5-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4856-28-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4856-6-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4856-0-0x0000000075002000-0x0000000075003000-memory.dmp

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memory/4856-2-0x0000000075000000-0x00000000755B1000-memory.dmp

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memory/4856-1-0x0000000075000000-0x00000000755B1000-memory.dmp

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