remcos | 90c1a3b51b8c4b00bbb8eaef1ac7677592c08d3b3f6edeeb32a45a4b3c902e51

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 3044 set thread context of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.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	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
1984	018292540-LetterReguranPPI-20230814215304.PDF.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31
PID 3044 wrote to memory of 1984	3044	018292540-LetterReguranPPI-20230814215304.PDF.exe	31

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:3044
- 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:1984

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
94f2048ab49f4b8235f44e94824e8533

SHA1
07a613f0d5802813e6725908ec39f6ca7b98c3ba

SHA256
223ababa55bc51bba0afc787caca233e12a1f5fbe5bd7079e1854b88704d9927

SHA512
e33ef187cd70ca6174acb16aadc8be845331c224876a76ce75bafd0d576c8593279f09909ee9d63727303bd716edf004dab39c8df8c89a135ec48001ea43ef1f

Download Submit
memory/1984-8-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1984-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1984-43-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3044-30-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-1-0x0000000001260000-0x0000000001346000-memory.dmp

Filesize
920KB

Download
memory/3044-0-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/3044-5-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-2-0x0000000074540000-0x0000000074C2E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-6-0x0000000004D00000-0x0000000004DC0000-memory.dmp

Filesize
768KB

Download
memory/3044-4-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/3044-3-0x00000000003B0000-0x00000000003C2000-memory.dmp

Filesize
72KB

Download

Analysis

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