remcos | f31693ba292189d1297f38613de12314f6c006305e1ee89a8016339c909b4d7c

General

Target

DOCUMENT_MAIL_MK77123.PDF.exe
Size

973KB
MD5

ae0d8eed18706f49d7c7a7dd9164a920
SHA1

0c939acf01c15cea6e9efd6ab8d8dc5499a7ef4f
SHA256

4cf29e8cd55272cc6677212c469cfb53464225f42c85942abceef9d7bd86aad3
SHA512

5b64c63e9918f84f89b6c5ebddd66d8ddaca92a050514c31a07c10db0232cdbf63037d5fa0d99d8f0b838e6afd2a7382094df6f8334bc5d39a2a288f2e31de54
SSDEEP

24576:YQ3AghukvVdP/tGOn0b7hvtbL67vgnEz9Z1zS:YQQRIobXL6zgEz9ZNS

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:

DOCUMENT_MAIL_MK77123.PDF.exe

description pid process target process

PID 2328 set thread context of 2868 2328 DOCUMENT_MAIL_MK77123.PDF.exe DOCUMENT_MAIL_MK77123.PDF.exe

description	pid	process	target process
PID 2328 set thread context of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.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:

DOCUMENT_MAIL_MK77123.PDF.exeDOCUMENT_MAIL_MK77123.PDF.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DOCUMENT_MAIL_MK77123.PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DOCUMENT_MAIL_MK77123.PDF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

DOCUMENT_MAIL_MK77123.PDF.exe

pid process

2868 DOCUMENT_MAIL_MK77123.PDF.exe

pid	process
2868	DOCUMENT_MAIL_MK77123.PDF.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

DOCUMENT_MAIL_MK77123.PDF.exe

description	pid	process	target process
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe
PID 2328 wrote to memory of 2868	2328	DOCUMENT_MAIL_MK77123.PDF.exe	DOCUMENT_MAIL_MK77123.PDF.exe

C:\Users\Admin\AppData\Local\Temp\DOCUMENT_MAIL_MK77123.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\DOCUMENT_MAIL_MK77123.PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Users\Admin\AppData\Local\Temp\DOCUMENT_MAIL_MK77123.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\DOCUMENT_MAIL_MK77123.PDF.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2868

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
656ffa8ab80927d8e452378c02de4a81

SHA1
6447bbbcfee9eab6be02de7a745ba266a5d08c58

SHA256
e859990d320e0c9cd8fd44f82dbf7f219828ac5765eec315ded01ead0a50eb17

SHA512
d9d9003ddb13829062cf09e17fc2ce4531291088366f8585e18587127dd1dd1b1170455a2d2864116d4eef6fd3c11ad9615ff7f9ccb918bf38b10393d72f3257

Download Submit
memory/2328-25-0x0000000074970000-0x000000007505E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-1-0x0000000000940000-0x0000000000A38000-memory.dmp

Filesize
992KB

Download
memory/2328-2-0x0000000074970000-0x000000007505E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-3-0x000000007497E000-0x000000007497F000-memory.dmp

Filesize
4KB

Download
memory/2328-4-0x00000000008C0000-0x00000000008D2000-memory.dmp

Filesize
72KB

Download
memory/2328-5-0x0000000074970000-0x000000007505E000-memory.dmp

Filesize
6.9MB

Download
memory/2328-6-0x0000000005390000-0x0000000005450000-memory.dmp

Filesize
768KB

Download
memory/2328-0-0x000000007497E000-0x000000007497F000-memory.dmp

Filesize
4KB

Download
memory/2868-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2868-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-10-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-8-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2868-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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