remcos | 59259079176b00aed097dac7a4fc27839d26193dd42ae5a9403ace8b50372317

General

Target

sq0215370~List.exe
Size

1.3MB
MD5

dc63a727a7d1005d68e29033261fcb8c
SHA1

05ec7307fc4b43a1748f158fa3e1ce31e8137e4f
SHA256

1c01d2be9ecfe6ee4e1901881f4184ee0db09a47432e238adb2935547c0f5fa4
SHA512

766e345123b82222f1915c674bff3f5d3f983653e050dae0684de44c314ebbe5a6ed6581dec1400ed2847a02adb1faf3cef5b96991206bdee36fde0b55897a3f
SSDEEP

24576:ku6J33O0c+JY5UZ+XC0kGso6FaFk9hotA9cXmjhc75cNRt9zG6eLb45WY:eu0c++OCvkGs9FaFkzotQcXmj21cNRtF

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\carryover.vbs	carryover.exe

Executes dropped EXE 1 IoCs

pid	Process
2356	carryover.exe

Loads dropped DLL 6 IoCs

pid	Process
3064	sq0215370~List.exe
2696	WerFault.exe
2696	WerFault.exe
2696	WerFault.exe
2696	WerFault.exe
2696	WerFault.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0007000000015ec9-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2356 set thread context of 2788	2356	carryover.exe	31
PID 2788 set thread context of 1320	2788	svchost.exe	33

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2696	2356	WerFault.exe	30

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sq0215370~List.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	carryover.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2788	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2356	carryover.exe
2788	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
3064	sq0215370~List.exe
3064	sq0215370~List.exe
2356	carryover.exe
2356	carryover.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
3064	sq0215370~List.exe
3064	sq0215370~List.exe
2356	carryover.exe
2356	carryover.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3064 wrote to memory of 2356	3064	sq0215370~List.exe	30
PID 3064 wrote to memory of 2356	3064	sq0215370~List.exe	30
PID 3064 wrote to memory of 2356	3064	sq0215370~List.exe	30
PID 3064 wrote to memory of 2356	3064	sq0215370~List.exe	30
PID 2356 wrote to memory of 2788	2356	carryover.exe	31
PID 2356 wrote to memory of 2788	2356	carryover.exe	31
PID 2356 wrote to memory of 2788	2356	carryover.exe	31
PID 2356 wrote to memory of 2788	2356	carryover.exe	31
PID 2356 wrote to memory of 2788	2356	carryover.exe	31
PID 2356 wrote to memory of 2696	2356	carryover.exe	32
PID 2356 wrote to memory of 2696	2356	carryover.exe	32
PID 2356 wrote to memory of 2696	2356	carryover.exe	32
PID 2356 wrote to memory of 2696	2356	carryover.exe	32
PID 2788 wrote to memory of 1320	2788	svchost.exe	33
PID 2788 wrote to memory of 1320	2788	svchost.exe	33
PID 2788 wrote to memory of 1320	2788	svchost.exe	33
PID 2788 wrote to memory of 1320	2788	svchost.exe	33
PID 2788 wrote to memory of 1320	2788	svchost.exe	33

C:\Users\Admin\AppData\Local\Temp\sq0215370~List.exe
"C:\Users\Admin\AppData\Local\Temp\sq0215370~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:3064
- C:\Users\Admin\AppData\Local\emboweling\carryover.exe
  "C:\Users\Admin\AppData\Local\Temp\sq0215370~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:2356
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\sq0215370~List.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2788
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:1320
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2356 -s 316
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2696

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:\Users\Admin\AppData\Local\Temp\semispinalis

Filesize
483KB

MD5
8b16e192d8f536b758b73f64464f4a21

SHA1
7faf69cdb1fbb264689760f291be23775c296aff

SHA256
fc248a64e2cb1183ef831907b873b88896aca28b7561f2f13d89e917488e1bca

SHA512
d3d8377726f22d7541c9e01640d84c095a0f32f2251539e4bd845bfbddf4e215be85a360592738fc7748cb43fc050f912391837cdfac4fc738ba6df5c6bd08a6

Download Submit
\Users\Admin\AppData\Local\emboweling\carryover.exe

Filesize
1.3MB

MD5
dc63a727a7d1005d68e29033261fcb8c

SHA1
05ec7307fc4b43a1748f158fa3e1ce31e8137e4f

SHA256
1c01d2be9ecfe6ee4e1901881f4184ee0db09a47432e238adb2935547c0f5fa4

SHA512
766e345123b82222f1915c674bff3f5d3f983653e050dae0684de44c314ebbe5a6ed6581dec1400ed2847a02adb1faf3cef5b96991206bdee36fde0b55897a3f

Download Submit
memory/1320-35-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/1320-32-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/1320-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1320-36-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2356-20-0x0000000000A40000-0x0000000000E40000-memory.dmp

Filesize
4.0MB

Download
memory/2788-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2788-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2788-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2788-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3064-6-0x0000000000C10000-0x0000000001010000-memory.dmp

Filesize
4.0MB

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Analysis

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