remcos | 3e080ccb41529931481861828df6a2ca32b039ed0217adcecb832547d8da0566

General

Target

018292540-LetterReguranPPI-20230814215304.PDF.exe
Size

897KB
MD5

667060459d876845db2677ddc3d58488
SHA1

800f741383f4f4027d70a5942fe4b263b592eed5
SHA256

3e080ccb41529931481861828df6a2ca32b039ed0217adcecb832547d8da0566
SHA512

c9fce460c1b2de0e53782df4a84dc6c1d28bc4b8b8850b0adcbf3f87e72d156654760ebb32e52582a7adc4e3d58526959b51cdfd72fa947b314749c23492fee7
SSDEEP

24576:vMy1GyhxutkS+BwTCEGh0BV0i7OqD4uTfV:LFhxutkdeCEGmB6uD4uD

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 5004 set thread context of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92

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	018292540-LetterReguranPPI-20230814215304.PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	018292540-LetterReguranPPI-20230814215304.PDF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	018292540-LetterReguranPPI-20230814215304.PDF.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92
PID 5004 wrote to memory of 2536	5004	018292540-LetterReguranPPI-20230814215304.PDF.exe	92

C:\Users\Admin\AppData\Local\Temp\018292540-LetterReguranPPI-20230814215304.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\018292540-LetterReguranPPI-20230814215304.PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5004
- C:\Users\Admin\AppData\Local\Temp\018292540-LetterReguranPPI-20230814215304.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\018292540-LetterReguranPPI-20230814215304.PDF.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2536

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
89406e22c5bad6b07a513e5d49033211

SHA1
c65213d6c652bba322e8006d1ce8171ea4801059

SHA256
dc7533dc3fe31ae6ca48a168da3812b139c0353c4dcda03786b3b024e4a65d30

SHA512
ee1fb7e30a5ac6638191ff39924774c309dbc86662e18bdff5c68caf423ff9f8e0a852b722e947f35ec5b5b8cc5f8b5f290c6b3ba645fb45fea9479f380341a5

Download Submit
memory/2536-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-51-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-58-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2536-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/5004-8-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5004-20-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5004-10-0x0000000009F00000-0x0000000009F9C000-memory.dmp

Filesize
624KB

Download
memory/5004-9-0x00000000061A0000-0x0000000006260000-memory.dmp

Filesize
768KB

Download
memory/5004-0-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/5004-7-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/5004-6-0x0000000005390000-0x00000000053A2000-memory.dmp

Filesize
72KB

Download
memory/5004-5-0x0000000075190000-0x0000000075940000-memory.dmp

Filesize
7.7MB

Download
memory/5004-4-0x0000000004E00000-0x0000000004E0A000-memory.dmp

Filesize
40KB

Download
memory/5004-3-0x0000000004D60000-0x0000000004DF2000-memory.dmp

Filesize
584KB

Download
memory/5004-2-0x00000000053F0000-0x0000000005994000-memory.dmp

Filesize
5.6MB

Download
memory/5004-1-0x00000000002C0000-0x00000000003A6000-memory.dmp

Filesize
920KB

Download

Analysis

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