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 432 set thread context of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89

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
2944	018292540-LetterReguranPPI-20230814215304.PDF.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89
PID 432 wrote to memory of 2944	432	018292540-LetterReguranPPI-20230814215304.PDF.exe	89

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:432
- 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:2944

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
fce4eab7ec18aa939b9ff629b3ac90f7

SHA1
c913dfebecd570c6071878f9068329ff5f433e17

SHA256
aed22c3ab416376d2f337e0046bfe7bcfe4a252156b20814edab35c4c07109ff

SHA512
50c125a8d99fd954b7c2844e7b0918355ca30d31b68ec694cf4544c4a92e1b909cc664c082ad0fdac2fdfe534f18d6bc0d3d812b11af4f4058bf68d343e07cfb

Download Submit
memory/432-6-0x0000000005730000-0x0000000005742000-memory.dmp

Filesize
72KB

Download
memory/432-2-0x0000000005790000-0x0000000005D34000-memory.dmp

Filesize
5.6MB

Download
memory/432-3-0x00000000051E0000-0x0000000005272000-memory.dmp

Filesize
584KB

Download
memory/432-4-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/432-5-0x00000000052F0000-0x00000000052FA000-memory.dmp

Filesize
40KB

Download
memory/432-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/432-7-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/432-8-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/432-9-0x0000000007A80000-0x0000000007B40000-memory.dmp

Filesize
768KB

Download
memory/432-10-0x000000000A5A0000-0x000000000A63C000-memory.dmp

Filesize
624KB

Download
memory/432-1-0x00000000007F0000-0x00000000008D6000-memory.dmp

Filesize
920KB

Download
memory/432-20-0x0000000074CA0000-0x0000000075450000-memory.dmp

Filesize
7.7MB

Download
memory/2944-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-23-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2944-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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