remcos | 021950e9f748c8d7309ec7044b17ad6a05870b7978699dbbbbc226fd1a250914

General

Target

RFQ00126345.exe
Size

1.3MB
MD5

5f38edf8c588efd365f6c82c92d5f0f6
SHA1

6f8ec411858b7410a22401f6c9d6a2a5c45aaa9b
SHA256

d51b3625115680dc3d6e0f5881f914f0373a277e2ef2ec56c88c3f45de997877
SHA512

7bc7886d3c81421d6d9cdc1cf4ee3af5fea572de578fbc8c42509129b37716de7552e3147a3ac84261c463fe79fb60511eff18d45c3bc3d411905c22389028ef
SSDEEP

24576:Cu6J33O0c+JY5UZ+XC0kGso6FapubMGC8db/ZOid2MNTosdIIDnWY:ku0c++OCvkGs9FapCX0yTnyY

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.64.152:2559

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-ZFXG9Y
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\derogates.vbs	derogates.exe

Executes dropped EXE 1 IoCs

pid	Process
1848	derogates.exe

Loads dropped DLL 1 IoCs

pid	Process
2076	RFQ00126345.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0008000000016c81-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1848 set thread context of 2312	1848	derogates.exe	31
PID 2312 set thread context of 2228	2312	svchost.exe	32

System Location Discovery: System Language Discovery 1 TTPs 3 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	RFQ00126345.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	derogates.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2312	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1848	derogates.exe
2312	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2076	RFQ00126345.exe
2076	RFQ00126345.exe
1848	derogates.exe
1848	derogates.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2076	RFQ00126345.exe
2076	RFQ00126345.exe
1848	derogates.exe
1848	derogates.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 1848	2076	RFQ00126345.exe	30
PID 2076 wrote to memory of 1848	2076	RFQ00126345.exe	30
PID 2076 wrote to memory of 1848	2076	RFQ00126345.exe	30
PID 2076 wrote to memory of 1848	2076	RFQ00126345.exe	30
PID 1848 wrote to memory of 2312	1848	derogates.exe	31
PID 1848 wrote to memory of 2312	1848	derogates.exe	31
PID 1848 wrote to memory of 2312	1848	derogates.exe	31
PID 1848 wrote to memory of 2312	1848	derogates.exe	31
PID 1848 wrote to memory of 2312	1848	derogates.exe	31
PID 2312 wrote to memory of 2228	2312	svchost.exe	32
PID 2312 wrote to memory of 2228	2312	svchost.exe	32
PID 2312 wrote to memory of 2228	2312	svchost.exe	32
PID 2312 wrote to memory of 2228	2312	svchost.exe	32
PID 2312 wrote to memory of 2228	2312	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\RFQ00126345.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ00126345.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2076
- C:\Users\Admin\AppData\Local\miaou\derogates.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ00126345.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1848
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ00126345.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2312
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:2228

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

\Users\Admin\AppData\Local\miaou\derogates.exe

Filesize
1.3MB

MD5
5f38edf8c588efd365f6c82c92d5f0f6

SHA1
6f8ec411858b7410a22401f6c9d6a2a5c45aaa9b

SHA256
d51b3625115680dc3d6e0f5881f914f0373a277e2ef2ec56c88c3f45de997877

SHA512
7bc7886d3c81421d6d9cdc1cf4ee3af5fea572de578fbc8c42509129b37716de7552e3147a3ac84261c463fe79fb60511eff18d45c3bc3d411905c22389028ef

Download Submit
memory/1848-20-0x0000000000710000-0x0000000000B10000-memory.dmp

Filesize
4.0MB

Download
memory/2076-6-0x0000000000AF0000-0x0000000000EF0000-memory.dmp

Filesize
4.0MB

Download
memory/2228-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2228-31-0x0000000000090000-0x0000000000098000-memory.dmp

Filesize
32KB

Download
memory/2228-30-0x0000000000090000-0x0000000000098000-memory.dmp

Filesize
32KB

Download
memory/2228-28-0x0000000000090000-0x0000000000098000-memory.dmp

Filesize
32KB

Download
memory/2312-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2312-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2312-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2312-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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