remcos | 1193157e2a338dbe8d057b125d36fffd2c05be694c1bfdaaf49d52e30bd08ebd

Analysis

max time kernel
150s
max time network
152s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250217-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250217-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
11/03/2025, 16:14

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General

Target
coderoom-main/nyoilsafkjawd.exe
Size 487KB
Sample250311-tp2gvsxpv2
SHA256 fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
MD5 0bea38a3f664f5c8d72ab74db022aacd
SHA1 d185b86120ea6fcae137edcff25547fda2b6d4a5
SHA512 22089f02f5d941ff4ea4f0fdbf3c7b2cdfdb3bacfda7ac3151dd87d68621fa550c0bf3c13e0d512aa5f5823e8f786b13d12c7ea4699574a895c31b3d6f85de42
SSDEEP 12288:P200OFp+G0imvHn3Cp6qyBP+YdsvZGH3:e0Zp+ViehBWY0ZS
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos firefox mts discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

firefox mts

91.135.156.200:8109

Attributes

audio_folder
Ìèêðîôîííûå çàïèñè
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
app.exe
copy_folder
firefox tsms
delete_file
true
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
cfg.dat
keylog_flag
false
keylog_folder
firefox mssd
keylog_path
%AppData%
mouse_option
false
mutex
Ðìê-HQT17V
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Ñêðèíøîòû
screenshot_path
%AppData%
screenshot_time
10
startup_value
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

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-1-5-21-2501448743-3279416841-701563739-1000\Control Panel\International\Geo\Nation	nyoilsafkjawd.exe

Executes dropped EXE 1 IoCs

pid	Process
4356	app.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-1-5-21-2501448743-3279416841-701563739-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\￐￬￪-HQT17V = "\"C:\\Users\\Admin\\AppData\\Roaming\\firefox tsms\\app.exe\""	nyoilsafkjawd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\￐￬￪-HQT17V = "\"C:\\Users\\Admin\\AppData\\Roaming\\firefox tsms\\app.exe\""	nyoilsafkjawd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2501448743-3279416841-701563739-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\￐￬￪-HQT17V = "\"C:\\Users\\Admin\\AppData\\Roaming\\firefox tsms\\app.exe\""	app.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\￐￬￪-HQT17V = "\"C:\\Users\\Admin\\AppData\\Roaming\\firefox tsms\\app.exe\""	app.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4356 set thread context of 2080	4356	app.exe	85

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	nyoilsafkjawd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	app.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	nyoilsafkjawd.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4356	app.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4356	app.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 4356	1992	nyoilsafkjawd.exe	84
PID 1992 wrote to memory of 4356	1992	nyoilsafkjawd.exe	84
PID 1992 wrote to memory of 4356	1992	nyoilsafkjawd.exe	84
PID 4356 wrote to memory of 2080	4356	app.exe	85
PID 4356 wrote to memory of 2080	4356	app.exe	85
PID 4356 wrote to memory of 2080	4356	app.exe	85
PID 4356 wrote to memory of 2080	4356	app.exe	85

C:\Users\Admin\AppData\Local\Temp\coderoom-main\nyoilsafkjawd.exe
"C:\Users\Admin\AppData\Local\Temp\coderoom-main\nyoilsafkjawd.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Users\Admin\AppData\Roaming\firefox tsms\app.exe
  "C:\Users\Admin\AppData\Roaming\firefox tsms\app.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4356
- - C:\Windows\SysWOW64\rmclient.exe
    rmclient.exe
    3⤵
    PID:2080

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

app.exe

Path C:\Users\Admin\AppData\Roaming\firefox tsms\app.exe
Size 487KB
SHA256 fa1c16a3024d35ebc4f6996d1791ead89a08dae2ebd87e39c9997c04613c4645
MD5 0bea38a3f664f5c8d72ab74db022aacd
SHA1 d185b86120ea6fcae137edcff25547fda2b6d4a5
SHA512 22089f02f5d941ff4ea4f0fdbf3c7b2cdfdb3bacfda7ac3151dd87d68621fa550c0bf3c13e0d512aa5f5823e8f786b13d12c7ea4699574a895c31b3d6f85de42
SSDEEP 12288:P200OFp+G0imvHn3Cp6qyBP+YdsvZGH3:e0Zp+ViehBWY0ZS
MD5 SHA1 SHA512 SSDEEP

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memory/2080-2-0x00000000002F0000-0x0000000000371000-memory.dmp

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memory/2080-1-0x00000000002F0000-0x0000000000371000-memory.dmp

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memory/2080-3-0x00000000002F0000-0x0000000000371000-memory.dmp

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memory/2080-4-0x00000000002F0000-0x0000000000371000-memory.dmp

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memory/2080-7-0x00000000002F0000-0x0000000000371000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads