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

Processes:

ungziped_file.exe

description pid process target process

PID 920 set thread context of 2240 920 ungziped_file.exe ungziped_file.exe

description	pid	process	target process
PID 920 set thread context of 2240	920	ungziped_file.exe	ungziped_file.exe

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

Processes:

ungziped_file.exeungziped_file.exe

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

Processes:

ungziped_file.exe

pid process

2240 ungziped_file.exe

pid	process
2240	ungziped_file.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

ungziped_file.exe

description	pid	process	target process
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe
PID 920 wrote to memory of 2240	920	ungziped_file.exe	ungziped_file.exe

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:920
- 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:2240

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:\ProgramData\pdf\logs.dat

Filesize
144B

MD5
0e7fe37f585a9d0415b5ceb01c7e7db2

SHA1
0302506427152ccee35e4b54290cf6685fecf3be

SHA256
470c769250694d8d35d369d08c114db3fd48e08d66ba825c0f399aabbaec5696

SHA512
2e8b167f47a329bc4ab1d3146a00ba5078ef450e16dec2f4511684bdff6739d005866df40d1b6d51d99673be4be2c6197c6d976f802273c84561195257e71682

Download Submit
memory/920-6-0x0000000074600000-0x0000000074DB0000-memory.dmp

Filesize
7.7MB

Download
memory/920-2-0x00000000060A0000-0x0000000006644000-memory.dmp

Filesize
5.6MB

Download
memory/920-3-0x0000000005A00000-0x0000000005A92000-memory.dmp

Filesize
584KB

Download
memory/920-4-0x0000000005AF0000-0x0000000005B8C000-memory.dmp

Filesize
624KB

Download
memory/920-5-0x00000000059D0000-0x00000000059DA000-memory.dmp

Filesize
40KB

Download
memory/920-0-0x000000007460E000-0x000000007460F000-memory.dmp

Filesize
4KB

Download
memory/920-7-0x0000000005D70000-0x0000000005D82000-memory.dmp

Filesize
72KB

Download
memory/920-8-0x000000007460E000-0x000000007460F000-memory.dmp

Filesize
4KB

Download
memory/920-9-0x0000000074600000-0x0000000074DB0000-memory.dmp

Filesize
7.7MB

Download
memory/920-10-0x00000000085A0000-0x0000000008660000-memory.dmp

Filesize
768KB

Download
memory/920-1-0x0000000000F10000-0x0000000000FF6000-memory.dmp

Filesize
920KB

Download
memory/920-20-0x0000000074600000-0x0000000074DB0000-memory.dmp

Filesize
7.7MB

Download
memory/2240-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2240-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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