remcos | db70d3bc51ab841d791d58a97816b8542267e679fd37737236b95944eaac0643

General

Target

PO.exe
Size

1.3MB
MD5

5d15087ab767a84ec8e8805bb26eb8b8
SHA1

01bba4ff864c053b3485b20cb4e60666be7355a7
SHA256

6b509b581157e265d6e3d2bdeed463195464daeafe98b57cea4ef59141d21b62
SHA512

dcc463497cfbe933de85999b6010382b82a449f827621f1f5215a9459696f80172e69019b8d1385d2fc3edfe0543035b73042cbab7d2b860c8e382d8fa9d5805
SSDEEP

24576:ztb20pkaCqT5TBWgNQ7azerXt4yv6uaDWBq74Ws66A:wVg5tQ7azeryYA4OZj5

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.64.152:2559

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-ZFXG9Y
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

Drops startup file 1 IoCs

Processes:

Bactris.exe

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

Executes dropped EXE 2 IoCs

Processes:

Bactris.exeBactris.exe

pid	Process
3432	Bactris.exe
2360	Bactris.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/files/0x0007000000023cbf-9.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Bactris.exesvchost.exe

description	pid	Process	procid_target
PID 2360 set thread context of 4396	2360	Bactris.exe	86
PID 4396 set thread context of 1388	4396	svchost.exe	87

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

Processes:

PO.exeBactris.exeBactris.exesvchost.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bactris.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bactris.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

svchost.exe

pid	Process
4396	svchost.exe
4396	svchost.exe

Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

Bactris.exeBactris.exesvchost.exe

pid	Process
3432	Bactris.exe
2360	Bactris.exe
4396	svchost.exe

Suspicious use of FindShellTrayWindow 6 IoCs

Processes:

PO.exeBactris.exeBactris.exe

pid	Process
4036	PO.exe
4036	PO.exe
3432	Bactris.exe
3432	Bactris.exe
2360	Bactris.exe
2360	Bactris.exe

Suspicious use of SendNotifyMessage 6 IoCs

Processes:

PO.exeBactris.exeBactris.exe

pid	Process
4036	PO.exe
4036	PO.exe
3432	Bactris.exe
3432	Bactris.exe
2360	Bactris.exe
2360	Bactris.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

PO.exeBactris.exeBactris.exesvchost.exe

description	pid	Process	procid_target
PID 4036 wrote to memory of 3432	4036	PO.exe	83
PID 4036 wrote to memory of 3432	4036	PO.exe	83
PID 4036 wrote to memory of 3432	4036	PO.exe	83
PID 3432 wrote to memory of 756	3432	Bactris.exe	84
PID 3432 wrote to memory of 756	3432	Bactris.exe	84
PID 3432 wrote to memory of 756	3432	Bactris.exe	84
PID 3432 wrote to memory of 2360	3432	Bactris.exe	85
PID 3432 wrote to memory of 2360	3432	Bactris.exe	85
PID 3432 wrote to memory of 2360	3432	Bactris.exe	85
PID 2360 wrote to memory of 4396	2360	Bactris.exe	86
PID 2360 wrote to memory of 4396	2360	Bactris.exe	86
PID 2360 wrote to memory of 4396	2360	Bactris.exe	86
PID 2360 wrote to memory of 4396	2360	Bactris.exe	86
PID 4396 wrote to memory of 1388	4396	svchost.exe	87
PID 4396 wrote to memory of 1388	4396	svchost.exe	87
PID 4396 wrote to memory of 1388	4396	svchost.exe	87
PID 4396 wrote to memory of 1388	4396	svchost.exe	87

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Users\Admin\AppData\Local\corynteria\Bactris.exe
  "C:\Users\Admin\AppData\Local\Temp\PO.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3432
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\PO.exe"
    3⤵
    PID:756
- - C:\Users\Admin\AppData\Local\corynteria\Bactris.exe
    "C:\Users\Admin\AppData\Local\corynteria\Bactris.exe"
    3⤵
    - 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:2360
  - - C:\Windows\SysWOW64\svchost.exe
      "C:\Users\Admin\AppData\Local\corynteria\Bactris.exe"
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:4396
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:1388

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\aut9867.tmp

Filesize
389KB

MD5
dff4656eeb9273bfc7c07abe89b67ce8

SHA1
6835c2acbf72ffec1a4445aa6161d11ae0257820

SHA256
e3106421fe9b46c09de3ca31bc0856efd2c0efb285d0418324d197cd30eb1a29

SHA512
1b1cc1be47324732eb5bf19b05d4d16fef65a78779a1b7621f2a36576ff6d27c9735c0650e3a0ab18bf3e1ac49e76db2b03547628414a564e7b0b1789824653e

Download Submit
C:\Users\Admin\AppData\Local\Temp\pluffer

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\pluffer

Filesize
483KB

MD5
10121f879e46a153d8a84858c3d92157

SHA1
8a3c78b464ea83838afc43da5eeedef974a1189c

SHA256
fcdeaa445e4259175484e0f9305d97c8ab07710807282cb2aeb2deb603a36704

SHA512
b21d0e23f0ec329c04d729c664564b9ef491d21b6fbcf0c907e7892c3d5b479dbed25826771bf84210b5964c24bfc9c74e57f29789b05de3db172aec7a101a52

Download Submit
C:\Users\Admin\AppData\Local\corynteria\Bactris.exe

Filesize
1.3MB

MD5
5d15087ab767a84ec8e8805bb26eb8b8

SHA1
01bba4ff864c053b3485b20cb4e60666be7355a7

SHA256
6b509b581157e265d6e3d2bdeed463195464daeafe98b57cea4ef59141d21b62

SHA512
dcc463497cfbe933de85999b6010382b82a449f827621f1f5215a9459696f80172e69019b8d1385d2fc3edfe0543035b73042cbab7d2b860c8e382d8fa9d5805

Download Submit
memory/1388-34-0x0000000001300000-0x000000000130E000-memory.dmp

Filesize
56KB

Download
memory/1388-35-0x0000000001300000-0x000000000130E000-memory.dmp

Filesize
56KB

Download
memory/1388-33-0x0000000001300000-0x000000000130E000-memory.dmp

Filesize
56KB

Download
memory/2360-28-0x00000000014F0000-0x00000000018F0000-memory.dmp

Filesize
4.0MB

Download
memory/3432-18-0x00000000017F0000-0x0000000001BF0000-memory.dmp

Filesize
4.0MB

Download
memory/4036-6-0x00000000018C0000-0x0000000001CC0000-memory.dmp

Filesize
4.0MB

Download
memory/4396-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4396-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4396-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4396-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4396-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads