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 1600 set thread context of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95

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
1520	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95
PID 1600 wrote to memory of 1520	1600	efbc15ccbe9e7b1f1648d94c5e38e3149bff5d33ad93c0a56e68db648050509a.exe	95

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:1600
- 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:1520

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
856c976b445514f91778a8c4c1e01e24

SHA1
aa79ec176b3f815f2603ccc07a1ca07329c1238b

SHA256
b85344e81d13332c868f3944302cc21ca573232ffe508e949d2d4551c2fbc234

SHA512
5e7a0770b929531d944138e4c6ab377801aa03ae80e69fcd4d0c63774e5ea4399f20a92b6122d215133e7871f56e836641758aa54bb490df51593ef92db72cb4

Download Submit
memory/1520-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-19-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-53-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-11-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-12-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1520-21-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1600-9-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/1600-20-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/1600-0-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/1600-1-0x0000000000FD0000-0x00000000010D4000-memory.dmp

Filesize
1.0MB

Download
memory/1600-3-0x0000000005AD0000-0x0000000005B62000-memory.dmp

Filesize
584KB

Download
memory/1600-10-0x00000000072C0000-0x0000000007380000-memory.dmp

Filesize
768KB

Download
memory/1600-2-0x0000000006140000-0x00000000066E4000-memory.dmp

Filesize
5.6MB

Download
memory/1600-8-0x0000000005C30000-0x0000000005C42000-memory.dmp

Filesize
72KB

Download
memory/1600-7-0x00000000749DE000-0x00000000749DF000-memory.dmp

Filesize
4KB

Download
memory/1600-6-0x0000000006CF0000-0x0000000006D8C000-memory.dmp

Filesize
624KB

Download
memory/1600-5-0x00000000749D0000-0x0000000075180000-memory.dmp

Filesize
7.7MB

Download
memory/1600-4-0x0000000005B90000-0x0000000005B9A000-memory.dmp

Filesize
40KB

Download

Analysis

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