remcos | a685d3ad4b5eca41910842585afeb9c9c60f7b6950e22da6fb4497136b72bd11

General

Target

Scan5437.exe
Size

968KB
MD5

420c470d9c3956325f590dff02110252
SHA1

747a5a253a7f0696b213d3e35d9e4bab0a4abadc
SHA256

88ed53d7adb9dffeafce182db0b08a075ad0934424949743497b8ea25c9d5671
SHA512

ba753c8b52f7655c8d5e10826b30ab77148f99838e3ff26929295dd336a2a80b05b954b49a3682e90f58c1f84748b4de36eb23eaa33e65880cea79146010f259
SSDEEP

12288:E2iNbIJAN+8yC+MYx99vo3UxmIVfxCKgSCjSbHfRwMZyhF0toHgt8jvIGc2AI:E1RIJ2DyTGUEIBx4uPgF0toAtsxn

Score

10^/10

remcos fiver20thaug discovery rat

Malware Config

Extracted

Family

remcos

Botnet

fiver20thAug

C2

rugar.duckdns.org:34046

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-DNAOTM
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4796 set thread context of 3140	4796	Scan5437.exe	95

System Location Discovery: System Language Discovery 1 TTPs 2 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	Scan5437.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Scan5437.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3140	Scan5437.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95
PID 4796 wrote to memory of 3140	4796	Scan5437.exe	95

C:\Users\Admin\AppData\Local\Temp\Scan5437.exe
"C:\Users\Admin\AppData\Local\Temp\Scan5437.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4796
- C:\Users\Admin\AppData\Local\Temp\Scan5437.exe
  "C:\Users\Admin\AppData\Local\Temp\Scan5437.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3140

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
45f97b95d69ac556762abedbfe9a9fa2

SHA1
4556a97982512e451f5d893ad7de5bdab7dadb74

SHA256
3e9ffb2e4c4c6ad63a6e490a16b8ea5074d5123bc99e99436365ad52df24a1d7

SHA512
cfe5df3c646eacad4df268421b9eb07401cb4f90b789b08d75d2e4a078cf47e9898aae0e89641b31fc5dbfcb3b42a24eedcc7ab14f34135be317971e14647a4e

Download Submit
memory/3140-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-62-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-61-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-54-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-13-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-17-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3140-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4796-8-0x0000000074CC0000-0x0000000075470000-memory.dmp

Filesize
7.7MB

Download
memory/4796-10-0x0000000008020000-0x00000000080E0000-memory.dmp

Filesize
768KB

Download
memory/4796-0-0x0000000074CCE000-0x0000000074CCF000-memory.dmp

Filesize
4KB

Download
memory/4796-2-0x00000000056E0000-0x0000000005C84000-memory.dmp

Filesize
5.6MB

Download
memory/4796-1-0x0000000000540000-0x0000000000638000-memory.dmp

Filesize
992KB

Download
memory/4796-4-0x00000000050E0000-0x00000000050EA000-memory.dmp

Filesize
40KB

Download
memory/4796-11-0x0000000006DC0000-0x0000000006E5C000-memory.dmp

Filesize
624KB

Download
memory/4796-9-0x0000000005340000-0x0000000005350000-memory.dmp

Filesize
64KB

Download
memory/4796-21-0x0000000074CC0000-0x0000000075470000-memory.dmp

Filesize
7.7MB

Download
memory/4796-7-0x0000000074CCE000-0x0000000074CCF000-memory.dmp

Filesize
4KB

Download
memory/4796-6-0x0000000005320000-0x000000000533A000-memory.dmp

Filesize
104KB

Download
memory/4796-5-0x0000000074CC0000-0x0000000075470000-memory.dmp

Filesize
7.7MB

Download
memory/4796-3-0x0000000005010000-0x00000000050A2000-memory.dmp

Filesize
584KB

Download

Analysis

Sharing