remcos | 9c6ba4f0c942734ff266b11cf3b4d7553c5d9683fbaf8a526b7cd351ce440ce4

General

Target

0021635Purchase.exe
Size

1.3MB
MD5

131a67c95691f8fc41713102f3528846
SHA1

dd8d92f7ecbf0cf280038fb94d00bcc43d17cf0a
SHA256

caca9062bbedb4519f51493d026a344f885ac593b7224d40458ff07f8ecee4ba
SHA512

1a685b5666e4d2e4d7fdae7b6230b32ed51f15e4d6a7da54f88c2962aba4d93cc93f1343058a07aaef5756356ca6b37f172a32d716e4862ad77b6a2ad80007f4
SSDEEP

24576:Mu6J33O0c+JY5UZ+XC0kGso6Faq+T+qyO49vQAlBH51ZfCiRWY:Wu0c++OCvkGs9FaqkyOuvxH5gY

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

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

Executes dropped EXE 1 IoCs

pid	Process
2756	jailkeeper.exe

Loads dropped DLL 1 IoCs

pid	Process
2708	0021635Purchase.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0036000000016ca5-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2756 set thread context of 2720	2756	jailkeeper.exe	32
PID 2720 set thread context of 2804	2720	svchost.exe	33

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	0021635Purchase.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jailkeeper.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2720	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2756	jailkeeper.exe
2720	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2708	0021635Purchase.exe
2708	0021635Purchase.exe
2756	jailkeeper.exe
2756	jailkeeper.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2708	0021635Purchase.exe
2708	0021635Purchase.exe
2756	jailkeeper.exe
2756	jailkeeper.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2708 wrote to memory of 2756	2708	0021635Purchase.exe	31
PID 2708 wrote to memory of 2756	2708	0021635Purchase.exe	31
PID 2708 wrote to memory of 2756	2708	0021635Purchase.exe	31
PID 2708 wrote to memory of 2756	2708	0021635Purchase.exe	31
PID 2756 wrote to memory of 2720	2756	jailkeeper.exe	32
PID 2756 wrote to memory of 2720	2756	jailkeeper.exe	32
PID 2756 wrote to memory of 2720	2756	jailkeeper.exe	32
PID 2756 wrote to memory of 2720	2756	jailkeeper.exe	32
PID 2756 wrote to memory of 2720	2756	jailkeeper.exe	32
PID 2720 wrote to memory of 2804	2720	svchost.exe	33
PID 2720 wrote to memory of 2804	2720	svchost.exe	33
PID 2720 wrote to memory of 2804	2720	svchost.exe	33
PID 2720 wrote to memory of 2804	2720	svchost.exe	33
PID 2720 wrote to memory of 2804	2720	svchost.exe	33

C:\Users\Admin\AppData\Local\Temp\0021635Purchase.exe
"C:\Users\Admin\AppData\Local\Temp\0021635Purchase.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2708
- C:\Users\Admin\AppData\Local\extrorsal\jailkeeper.exe
  "C:\Users\Admin\AppData\Local\Temp\0021635Purchase.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:2756
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\0021635Purchase.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:2804

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

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Downloads

\Users\Admin\AppData\Local\extrorsal\jailkeeper.exe

Filesize
1.3MB

MD5
131a67c95691f8fc41713102f3528846

SHA1
dd8d92f7ecbf0cf280038fb94d00bcc43d17cf0a

SHA256
caca9062bbedb4519f51493d026a344f885ac593b7224d40458ff07f8ecee4ba

SHA512
1a685b5666e4d2e4d7fdae7b6230b32ed51f15e4d6a7da54f88c2962aba4d93cc93f1343058a07aaef5756356ca6b37f172a32d716e4862ad77b6a2ad80007f4

Download Submit
memory/2708-6-0x0000000000800000-0x0000000000C00000-memory.dmp

Filesize
4.0MB

Download
memory/2720-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2720-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2720-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2720-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2756-20-0x0000000000A90000-0x0000000000E90000-memory.dmp

Filesize
4.0MB

Download
memory/2804-28-0x00000000000C0000-0x00000000000C8000-memory.dmp

Filesize
32KB

Download
memory/2804-31-0x00000000000C0000-0x00000000000C8000-memory.dmp

Filesize
32KB

Download
memory/2804-30-0x00000000000C0000-0x00000000000C8000-memory.dmp

Filesize
32KB

Download
memory/2804-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

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