remcos | 2b08ba942fe3db3fb1937ca40e1f392ed7d98513b70fd73c2da9723ac8c971ac

General

Target

PO-LIST.exe
Size

2.0MB
MD5

e21b8ab721253a904d148587bb256be4
SHA1

36c602234b7a066799d81ec264cb44ac366a0a8e
SHA256

0482038dee8cdc3992533d6d3bfd36123a0efc02809b9c1cb87febef83a3517a
SHA512

efc3adfd0023202c9582c5890d69fb995122bdaf1453c1be9c301cf4e74ed7c1191b4ee58ea51ad1661749a78a472b07d6a039da9afb1a9c1f8c99c3ebb5e0ba
SSDEEP

49152:6TvC/MTQYxsWR7alUZqvJ+UtB7wxAzbimbJX:KjTQYxsWRpZqvJ+kBGob7bJ

Score

10^/10

remcos spirit discovery rat

Malware Config

Extracted

Family

remcos

Botnet

SPIRIT

C2

nzobaku.ddns.net:8081

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
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-KF96SW
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

Drops startup file 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1780	name.exe

Loads dropped DLL 1 IoCs

pid	Process
2872	PO-LIST.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000800000001613e-4.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1780 set thread context of 2660	1780	name.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 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	PO-LIST.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	name.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1780	name.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2872	PO-LIST.exe
2872	PO-LIST.exe
1780	name.exe
1780	name.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2872	PO-LIST.exe
2872	PO-LIST.exe
1780	name.exe
1780	name.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2660	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2872 wrote to memory of 1780	2872	PO-LIST.exe	30
PID 2872 wrote to memory of 1780	2872	PO-LIST.exe	30
PID 2872 wrote to memory of 1780	2872	PO-LIST.exe	30
PID 2872 wrote to memory of 1780	2872	PO-LIST.exe	30
PID 1780 wrote to memory of 2660	1780	name.exe	31
PID 1780 wrote to memory of 2660	1780	name.exe	31
PID 1780 wrote to memory of 2660	1780	name.exe	31
PID 1780 wrote to memory of 2660	1780	name.exe	31
PID 1780 wrote to memory of 2660	1780	name.exe	31

C:\Users\Admin\AppData\Local\Temp\PO-LIST.exe
"C:\Users\Admin\AppData\Local\Temp\PO-LIST.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2872
- C:\Users\Admin\AppData\Local\directory\name.exe
  "C:\Users\Admin\AppData\Local\Temp\PO-LIST.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1780
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\PO-LIST.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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
31e47f8d24455d9d9b53b809c10370c4

SHA1
b39ce0c325e74a6ad92e85809d392c285f110eb8

SHA256
f77fcbb72b77ecc34dcaa76bb7acde6118424b544f1ac8061c1a9f2e7ea44e19

SHA512
d79d23f0bcb761103fbacaff6d08adf8d08ae52349fa1116353b36c1fd08478d4c2b1d806a6bd1c74e823b3c07ce75667c9a3d20e49af21811f65909fad369e9

Download Submit
\Users\Admin\AppData\Local\directory\name.exe

Filesize
2.0MB

MD5
e21b8ab721253a904d148587bb256be4

SHA1
36c602234b7a066799d81ec264cb44ac366a0a8e

SHA256
0482038dee8cdc3992533d6d3bfd36123a0efc02809b9c1cb87febef83a3517a

SHA512
efc3adfd0023202c9582c5890d69fb995122bdaf1453c1be9c301cf4e74ed7c1191b4ee58ea51ad1661749a78a472b07d6a039da9afb1a9c1f8c99c3ebb5e0ba

Download Submit
memory/1780-13-0x0000000002EA0000-0x00000000032A0000-memory.dmp

Filesize
4.0MB

Download
memory/2660-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2660-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2872-2-0x0000000002CD0000-0x0000000002ED0000-memory.dmp

Filesize
2.0MB

Download
memory/2872-8-0x0000000002CD0000-0x0000000002ED0000-memory.dmp

Filesize
2.0MB

Download
memory/2872-1-0x0000000002CD0000-0x0000000002ED0000-memory.dmp

Filesize
2.0MB

Download

Analysis

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