remcos | bdf1839d82ed286b49c40e5bae59374d59bcbb37ec28266b6aaca47e391ac747

General

Target

DMF12-DRAWING-SPECIFICATION.exe
Size

1.1MB
MD5

e244fd43d06ea0f234c71fff8e3f711f
SHA1

a913b51d74327b5fdafa2818acdf72636c3ca20a
SHA256

bdf1839d82ed286b49c40e5bae59374d59bcbb37ec28266b6aaca47e391ac747
SHA512

6af4afb9dbee48c7d6839d445d25abf3816ead782b0514f7e882a2a1d4e4b732b69bd953ef7b88574a3534d331bc0ce06e88d56ebde2988c8e2702cef2fcf823
SSDEEP

24576:uRmJkcoQricOIQxiZY1iaCV/uvPPJUTxDZS4NO7j4MUuvWu:7JZoQrbTFZY1iaCV/uPJoxk4NOIS

Score

10^/10

remcos nov 12 discovery rat

Malware Config

Extracted

Family

remcos

Botnet

NOV 12

C2

leehoi01.ddns.net:9373

103.187.117.76:5584

154.216.18.171:5584

154.216.20.223:5584

leehoi02.ddns.net:9373

areabill.duckdns.org:9373

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-KA6I08
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
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\outvaunts.vbs	outvaunts.exe

Executes dropped EXE 1 IoCs

pid	Process
3560	outvaunts.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000a000000023b7d-14.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3560 set thread context of 4840	3560	outvaunts.exe	87

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 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	DMF12-DRAWING-SPECIFICATION.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	outvaunts.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3560	outvaunts.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4840	svchost.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 3560	1800	DMF12-DRAWING-SPECIFICATION.exe	86
PID 1800 wrote to memory of 3560	1800	DMF12-DRAWING-SPECIFICATION.exe	86
PID 1800 wrote to memory of 3560	1800	DMF12-DRAWING-SPECIFICATION.exe	86
PID 3560 wrote to memory of 4840	3560	outvaunts.exe	87
PID 3560 wrote to memory of 4840	3560	outvaunts.exe	87
PID 3560 wrote to memory of 4840	3560	outvaunts.exe	87
PID 3560 wrote to memory of 4840	3560	outvaunts.exe	87

C:\Users\Admin\AppData\Local\Temp\DMF12-DRAWING-SPECIFICATION.exe
"C:\Users\Admin\AppData\Local\Temp\DMF12-DRAWING-SPECIFICATION.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1800
- C:\Users\Admin\AppData\Local\reaffect\outvaunts.exe
  "C:\Users\Admin\AppData\Local\Temp\DMF12-DRAWING-SPECIFICATION.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3560
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\DMF12-DRAWING-SPECIFICATION.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
6db96dd8a31a40cc8f9101231087fcbe

SHA1
560befd74857ad2359a5164a2dba05fc61be2766

SHA256
d53785137d0417ff40071dbb3a7145b9f28fd0589cfb2337d3a20755af21be4f

SHA512
5ce9011607ff367cd8e0c72abeceb3d41b126d34335f8783961a15537e2a90f3f4b28dcaee1f4892f3e8845d0dadebcb8814f8f60ca22c03e718e1ac2a9c4243

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

Filesize
168KB

MD5
0aba2400129da5292eb797d53eb72dc0

SHA1
c60074617f55450ef74cbfdeef45c4b45736d56a

SHA256
76cf1f1379ae03b203c5446c05a82cc0cfd1dedc27f1f8acac582d047183f278

SHA512
93701f4b62127938d885393823caa0f420c1537f35c65ecee3fa3d2960c20fdd2e1274e6efd4ba46e58282b3b895543672fd92f8c5f67c44cf2ba56338d41634

Download Submit
C:\Users\Admin\AppData\Local\reaffect\outvaunts.exe

Filesize
1.1MB

MD5
e244fd43d06ea0f234c71fff8e3f711f

SHA1
a913b51d74327b5fdafa2818acdf72636c3ca20a

SHA256
bdf1839d82ed286b49c40e5bae59374d59bcbb37ec28266b6aaca47e391ac747

SHA512
6af4afb9dbee48c7d6839d445d25abf3816ead782b0514f7e882a2a1d4e4b732b69bd953ef7b88574a3534d331bc0ce06e88d56ebde2988c8e2702cef2fcf823

Download Submit
memory/1800-11-0x00007FFB86270000-0x00007FFB86465000-memory.dmp

Filesize
2.0MB

Download
memory/3560-29-0x00007FFB86270000-0x00007FFB86465000-memory.dmp

Filesize
2.0MB

Download
memory/4840-44-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-38-0x00007FFB86270000-0x00007FFB86465000-memory.dmp

Filesize
2.0MB

Download
memory/4840-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4840-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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