remcos | a70404d3f9f9fc5e48ac266731e1b3b5a780ae9b0ba15e865418e5f908aa6178

General

Target

ungziped_file.exe
Size

899KB
MD5

410076dd0a643306b7991a32d9580143
SHA1

7c40be225169cf017cbdfe52ba8225b836dacf4c
SHA256

a70404d3f9f9fc5e48ac266731e1b3b5a780ae9b0ba15e865418e5f908aa6178
SHA512

22ddfe95a188974b1b492c75f4c03d53a5668b52be1520a5cc5fb13915c346ca8485bc5b0678f47e0ad51acf1c4dcd0ffb711605821a5229cafcf07bdc338190
SSDEEP

24576:lHIQsBmLOmrolDJO1Y6xMgKlfizJxQxSAKwe3GO80g:CQsBMOmrwCoZitYSApkGh0g

Score

10^/10

remcos host discovery rat

Malware Config

Extracted

Family

remcos

Botnet

Host

C2

oyo.work.gd:3142

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
vlc
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
pdf
mouse_option
false
mutex
jkm-I9KENP
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
ios
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2076 set thread context of 2852	2076	ungziped_file.exe	31

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	ungziped_file.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ungziped_file.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2852	ungziped_file.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31
PID 2076 wrote to memory of 2852	2076	ungziped_file.exe	31

C:\Users\Admin\AppData\Local\Temp\ungziped_file.exe
"C:\Users\Admin\AppData\Local\Temp\ungziped_file.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Users\Admin\AppData\Local\Temp\ungziped_file.exe
  "C:\Users\Admin\AppData\Local\Temp\ungziped_file.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2852

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

C:\ProgramData\pdf\logs.dat

Filesize
144B

MD5
28d1456d50fe5c23e69918cfa884dcad

SHA1
2ed662bdff948ceb2d0b2fac5d3764109ab574c1

SHA256
7098e97d6f0c0cc79bf677bf9db9ce97d8dc699e7a3e18872e2bfa52192d8fbd

SHA512
135dcaf02f4ab56dba69dbd8605a2e518b8fdfd434464649dabef6379d3b0ad9b260e12197c74692156b1190dfc3bb945dec8cc86ac7be5cd605a80496f995ac

Download Submit
memory/2076-26-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-1-0x00000000008E0000-0x00000000009C6000-memory.dmp

Filesize
920KB

Download
memory/2076-2-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-3-0x0000000000440000-0x0000000000452000-memory.dmp

Filesize
72KB

Download
memory/2076-4-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2076-5-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2076-6-0x0000000005DC0000-0x0000000005E80000-memory.dmp

Filesize
768KB

Download
memory/2076-0-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2852-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2852-16-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2852-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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