remcos | efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a

General

Target

efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe
Size

1.0MB
MD5

54a5436bb5bf3977e98eda5ce6f8e8d2
SHA1

5aed6273fe965d5e0c41b0e934aa92099327e4da
SHA256

efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a
SHA512

0948ad9fb15f733c2a7df75f72da0dbd9a96e27b8228b11346c20fdcd0fc2888c634bc2ba5cb3ffd82c79190745ac7eba8f278d7036d79fa2cab6de8fc1f6ab9
SSDEEP

12288:FWCYKo7G7uh5W7R1c7MWLy5FbvG8bDzIMM3bGpsgUVEgcb8YaMCnHMybyac7nSZ7:FW+o7Co5Ww7Muyjbu4VlUVEtaMJZ7SZ

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 2060 set thread context of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.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	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2324	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31
PID 2060 wrote to memory of 2324	2060	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	31

C:\Users\Admin\AppData\Local\Temp\efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe
"C:\Users\Admin\AppData\Local\Temp\efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Users\Admin\AppData\Local\Temp\efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe
  "C:\Users\Admin\AppData\Local\Temp\efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2324

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
4011753c56d2536d1b776e268d02b0f8

SHA1
7573453c9236f03e668a7ecef9403af140b5b8e4

SHA256
c3a46e1a1e8279db131b570228fbfe3e7e78d679f30591351c0493a5aacbed4a

SHA512
38427313f9eb64208c8f526666303b7d9f46571de3fe959f619616953a1978dd3c3492bd7ddc2dffc27cfd3cf6d1dc5f85975f4ed98a41efa1086d50e65270cd

Download Submit
memory/2060-0-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download
memory/2060-1-0x0000000000880000-0x0000000000984000-memory.dmp

Filesize
1.0MB

Download
memory/2060-2-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/2060-3-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download
memory/2060-4-0x00000000004F0000-0x0000000000502000-memory.dmp

Filesize
72KB

Download
memory/2060-5-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/2060-6-0x0000000004F00000-0x0000000004FC0000-memory.dmp

Filesize
768KB

Download
memory/2060-34-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/2324-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-7-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2324-10-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-17-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-13-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-37-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-59-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-65-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2324-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

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