remcos | 0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f

General

Target

0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe
Size

488KB
MD5

bf94dfb3c600fea20a0eb3b6f2ce410f
SHA1

9be4b304813ff777c1f5aa753dabe2b4aeb07391
SHA256

0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f
SHA512

00c72914e7344bb25b20296cb215bd3c53246eb4b55ca176ffb2a9226444d0ba992699337c76815e6a127738a8d616e466f06e2b3808e73397dc54eddf60891a
SSDEEP

6144:IuaNeIQv1dV4sXmFr7LAFIzT/72clnlePVTn0L9DEBDYTU6qynIHtc+KC:3SDQ3usXmFr70FGxlkn0LJYDiU6qyat

Score

10^/10

remcos yavakosa discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Yavakosa

C2

198.23.227.212:32583

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
yavascript.exe
copy_folder
xenor
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-DCHPS3
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

Executes dropped EXE 1 IoCs

pid	Process
2620	yavascript.exe

Loads dropped DLL 2 IoCs

pid	Process
2124	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe
2124	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-DCHPS3 = "\"C:\\Users\\Admin\\AppData\\Roaming\\xenor\\yavascript.exe\""	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-DCHPS3 = "\"C:\\Users\\Admin\\AppData\\Roaming\\xenor\\yavascript.exe\""	yavascript.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	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yavascript.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 2620	2124	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe	30
PID 2124 wrote to memory of 2620	2124	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe	30
PID 2124 wrote to memory of 2620	2124	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe	30
PID 2124 wrote to memory of 2620	2124	0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe	30

C:\Users\Admin\AppData\Local\Temp\0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe
"C:\Users\Admin\AppData\Local\Temp\0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Users\Admin\AppData\Roaming\xenor\yavascript.exe
  "C:\Users\Admin\AppData\Roaming\xenor\yavascript.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\xenor\yavascript.exe

Filesize
488KB

MD5
bf94dfb3c600fea20a0eb3b6f2ce410f

SHA1
9be4b304813ff777c1f5aa753dabe2b4aeb07391

SHA256
0b7faafb8da0c827bd09a35795d30bb4a703e6ad53c5ca99cfdd1cbfd63dd55f

SHA512
00c72914e7344bb25b20296cb215bd3c53246eb4b55ca176ffb2a9226444d0ba992699337c76815e6a127738a8d616e466f06e2b3808e73397dc54eddf60891a

Download Submit
memory/2124-1-0x0000000000930000-0x0000000000A30000-memory.dmp

Filesize
1024KB

Download
memory/2124-2-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2124-4-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2124-14-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2124-15-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/2620-23-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-26-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-17-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-20-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-21-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-22-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-19-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-24-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-25-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-18-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-27-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-28-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-29-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-30-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-31-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-32-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-33-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-34-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download
memory/2620-35-0x0000000000400000-0x00000000004E6000-memory.dmp

Filesize
920KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads