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 2280 set thread context of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29

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
2800	018292540-LetterReguranPPI-20230814215304.PDF.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29
PID 2280 wrote to memory of 2800	2280	018292540-LetterReguranPPI-20230814215304.PDF.exe	29

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:2280
- 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:2800

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
b98319fb18fb581963c6b2c3871de67e

SHA1
6babdcc79d3a783364e1c42e5c12eb5babd21f14

SHA256
072db891d9e6a7748976147e605a57422fd8d7d5f21a6a525c40a0f2f365cd3c

SHA512
96864c6046dd94558150f98dec98cb6b90f9178532361d6ade6616e48ad8b51d9c07d1aa1c2e04a43837d336d761924d8f5a08532fa9129a1b4c236dd8b9d309

Download Submit
memory/2280-0-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2280-1-0x0000000000CF0000-0x0000000000DD6000-memory.dmp

Filesize
920KB

Download
memory/2280-2-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2280-3-0x0000000000550000-0x0000000000562000-memory.dmp

Filesize
72KB

Download
memory/2280-4-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2280-5-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2280-6-0x0000000005D10000-0x0000000005DD0000-memory.dmp

Filesize
768KB

Download
memory/2280-33-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2800-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2800-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-9-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-34-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-39-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-42-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2800-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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