remcos | 346a4ca2e508923bcf0e4c0d73a2ee06d91bd436b8db4981ab9ecb16e6f5110d

Analysis

max time kernel
149s
max time network
129s
platform
windows7_x64
resource
win7-20220718-en
resource tags

arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
submitted
22/07/2022, 13:59

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General

Target
a334499e4fbda3a99a0bdc96b6bf64c5.exe
Size 798KB
Sample220722-radfdaffb8
SHA256 346a4ca2e508923bcf0e4c0d73a2ee06d91bd436b8db4981ab9ecb16e6f5110d
MD5 a334499e4fbda3a99a0bdc96b6bf64c5
SHA1 adec117f2bd7e77fd2335296f806a03e60dba983
SHA512 c0c96401bd4774fe45214188481bc63b8b855870e8797ff3a4d0c3bf301585e13dd977950a30f6439d3919a028025de8268fac38e4d2fc4db8f27db9a9885e79
MD5 SHA1 SHA512

Score

10^/10

remcos remotehost_meki persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost_Meki

mekremcos23.freedynamicdns.net:2397

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
qos.exe
copy_folder
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-3K2OV7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
wan
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Executes dropped EXE 2 IoCs

pid	Process
628	qos.exe
1252	qos.exe

Loads dropped DLL 1 IoCs

pid	Process
296	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\wan = "\"C:\\Users\\Admin\\AppData\\Roaming\\qos.exe\""	qos.exe
Key created	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\	a334499e4fbda3a99a0bdc96b6bf64c5.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\wan = "\"C:\\Users\\Admin\\AppData\\Roaming\\qos.exe\""	a334499e4fbda3a99a0bdc96b6bf64c5.exe
Key created	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\	qos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 772 set thread context of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 628 set thread context of 1252	628	qos.exe	33

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1252	qos.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 772 wrote to memory of 2024	772	a334499e4fbda3a99a0bdc96b6bf64c5.exe	28
PID 2024 wrote to memory of 1696	2024	a334499e4fbda3a99a0bdc96b6bf64c5.exe	29
PID 2024 wrote to memory of 1696	2024	a334499e4fbda3a99a0bdc96b6bf64c5.exe	29
PID 2024 wrote to memory of 1696	2024	a334499e4fbda3a99a0bdc96b6bf64c5.exe	29
PID 2024 wrote to memory of 1696	2024	a334499e4fbda3a99a0bdc96b6bf64c5.exe	29
PID 1696 wrote to memory of 296	1696	WScript.exe	30
PID 1696 wrote to memory of 296	1696	WScript.exe	30
PID 1696 wrote to memory of 296	1696	WScript.exe	30
PID 1696 wrote to memory of 296	1696	WScript.exe	30
PID 296 wrote to memory of 628	296	cmd.exe	32
PID 296 wrote to memory of 628	296	cmd.exe	32
PID 296 wrote to memory of 628	296	cmd.exe	32
PID 296 wrote to memory of 628	296	cmd.exe	32
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33
PID 628 wrote to memory of 1252	628	qos.exe	33

C:\Users\Admin\AppData\Local\Temp\a334499e4fbda3a99a0bdc96b6bf64c5.exe
"C:\Users\Admin\AppData\Local\Temp\a334499e4fbda3a99a0bdc96b6bf64c5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:772
- C:\Users\Admin\AppData\Local\Temp\a334499e4fbda3a99a0bdc96b6bf64c5.exe
  "C:\Users\Admin\AppData\Local\Temp\a334499e4fbda3a99a0bdc96b6bf64c5.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2024
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1696
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\qos.exe"
      4⤵
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:296
    - - C:\Users\Admin\AppData\Roaming\qos.exe
        
        C:\Users\Admin\AppData\Roaming\qos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:628
      - C:\Users\Admin\AppData\Roaming\qos.exe
        
        "C:\Users\Admin\AppData\Roaming\qos.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:1252

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 398B
SHA256 e10a418a00a6de27cf1c4b5e46f7543c290afc801835efa99b633ee3d75f7571
MD5 8e2a1197a839a92a232ec1bc06a9cf69
SHA1 a501c184e874983afccbde838f3260dfb7d62527
SHA512 26a35fa937a7d63f120b40331ed6370832d690d49b5cc0aa74350f9a7eaefa9f6433df6647ef5974a5de3ac055841166cf5543eb4002d831ecac05c3c896eaaf
MD5 SHA1 SHA512

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qos.exe

Path C:\Users\Admin\AppData\Roaming\qos.exe
Size 798KB
SHA256 346a4ca2e508923bcf0e4c0d73a2ee06d91bd436b8db4981ab9ecb16e6f5110d
MD5 a334499e4fbda3a99a0bdc96b6bf64c5
SHA1 adec117f2bd7e77fd2335296f806a03e60dba983
SHA512 c0c96401bd4774fe45214188481bc63b8b855870e8797ff3a4d0c3bf301585e13dd977950a30f6439d3919a028025de8268fac38e4d2fc4db8f27db9a9885e79
SSDEEP 24576:siQSf75QG8nWSBL8dem1tk7yko+9cz3+b4E:siP75QGyW08del7yko+9mh
MD5 SHA1 SHA512 SSDEEP

Submit Download

qos.exe

Path C:\Users\Admin\AppData\Roaming\qos.exe
Size 798KB
SHA256 346a4ca2e508923bcf0e4c0d73a2ee06d91bd436b8db4981ab9ecb16e6f5110d
MD5 a334499e4fbda3a99a0bdc96b6bf64c5
SHA1 adec117f2bd7e77fd2335296f806a03e60dba983
SHA512 c0c96401bd4774fe45214188481bc63b8b855870e8797ff3a4d0c3bf301585e13dd977950a30f6439d3919a028025de8268fac38e4d2fc4db8f27db9a9885e79
SSDEEP 24576:siQSf75QG8nWSBL8dem1tk7yko+9cz3+b4E:siP75QGyW08del7yko+9mh
MD5 SHA1 SHA512 SSDEEP

Submit Download

qos.exe

Path C:\Users\Admin\AppData\Roaming\qos.exe
Size 798KB
SHA256 346a4ca2e508923bcf0e4c0d73a2ee06d91bd436b8db4981ab9ecb16e6f5110d
MD5 a334499e4fbda3a99a0bdc96b6bf64c5
SHA1 adec117f2bd7e77fd2335296f806a03e60dba983
SHA512 c0c96401bd4774fe45214188481bc63b8b855870e8797ff3a4d0c3bf301585e13dd977950a30f6439d3919a028025de8268fac38e4d2fc4db8f27db9a9885e79
SSDEEP 24576:siQSf75QG8nWSBL8dem1tk7yko+9cz3+b4E:siP75QGyW08del7yko+9mh
MD5 SHA1 SHA512 SSDEEP

Submit Download

qos.exe

Path \Users\Admin\AppData\Roaming\qos.exe
Size 798KB
SHA256 346a4ca2e508923bcf0e4c0d73a2ee06d91bd436b8db4981ab9ecb16e6f5110d
MD5 a334499e4fbda3a99a0bdc96b6bf64c5
SHA1 adec117f2bd7e77fd2335296f806a03e60dba983
SHA512 c0c96401bd4774fe45214188481bc63b8b855870e8797ff3a4d0c3bf301585e13dd977950a30f6439d3919a028025de8268fac38e4d2fc4db8f27db9a9885e79
SSDEEP 24576:siQSf75QG8nWSBL8dem1tk7yko+9cz3+b4E:siP75QGyW08del7yko+9mh
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/628-85-0x00000000012D0000-0x000000000139E000-memory.dmp

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memory/772-58-0x0000000005590000-0x000000000560A000-memory.dmp

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memory/772-54-0x0000000000E20000-0x0000000000EEE000-memory.dmp

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memory/772-57-0x00000000054E0000-0x000000000558E000-memory.dmp

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memory/772-56-0x0000000000430000-0x0000000000448000-memory.dmp

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memory/772-55-0x0000000075481000-0x0000000075483000-memory.dmp

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memory/1252-104-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/1252-105-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/1252-106-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-62-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-77-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-75-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-71-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-69-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-67-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-66-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-65-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-64-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-60-0x0000000000400000-0x000000000047B000-memory.dmp

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memory/2024-59-0x0000000000400000-0x000000000047B000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads