remcos | 8ef563ef17bfbb577405d15a3261b4974762fd9a4a6230e726082482203b4c11

Analysis

max time kernel
150s
max time network
123s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
29-03-2023 13:37

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General

Target

tmp.exe
Size

1.2MB
MD5

bf1a47c0c4b257f6f491ba7864bfd32a
SHA1

3af41b456f935675bf47091ceef592db95089eab
SHA256

8ef563ef17bfbb577405d15a3261b4974762fd9a4a6230e726082482203b4c11
SHA512

5361fbb929ccb3ca791d6609a88483f0b1ac56853cf681f023fbec7b05c60300a834703efa735b550707720185a56e69a8d59fb6fc0a25141c56160e14ff9bb8
SSDEEP

24576:DBa1zRtHRQ+DFm/M3Z8NYIH6igBLqHTZbXmF:Dcd7xmL3+BLqHTUF

Score

10^/10

remcos wazy-host 2023 persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Wazy-host 2023

richardskoug34.ddns.net:7665

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
ros.exe
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
Rmc-BCD8D2
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
os
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1816	ros.exe
1544	ros.exe

Loads dropped DLL 1 IoCs

pid	Process
268	tmp.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\os = "\"C:\\Users\\Admin\\AppData\\Roaming\\ros.exe\""	ros.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	ros.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\os = "\"C:\\Users\\Admin\\AppData\\Roaming\\ros.exe\""	ros.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\os = "\"C:\\Users\\Admin\\AppData\\Roaming\\ros.exe\""	tmp.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	tmp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\os = "\"C:\\Users\\Admin\\AppData\\Roaming\\ros.exe\""	tmp.exe
Key created	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ros.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1116 set thread context of 268	1116	tmp.exe	28
PID 1816 set thread context of 1544	1816	ros.exe	30

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
1544	ros.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 1116 wrote to memory of 268	1116	tmp.exe	28
PID 268 wrote to memory of 1816	268	tmp.exe	29
PID 268 wrote to memory of 1816	268	tmp.exe	29
PID 268 wrote to memory of 1816	268	tmp.exe	29
PID 268 wrote to memory of 1816	268	tmp.exe	29
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30
PID 1816 wrote to memory of 1544	1816	ros.exe	30

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Users\Admin\AppData\Roaming\ros.exe
    "C:\Users\Admin\AppData\Roaming\ros.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1816
  - - C:\Users\Admin\AppData\Roaming\ros.exe
      "C:\Users\Admin\AppData\Roaming\ros.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1544

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

C:\Users\Admin\AppData\Roaming\ros.exe

Filesize
1.2MB

MD5
bf1a47c0c4b257f6f491ba7864bfd32a

SHA1
3af41b456f935675bf47091ceef592db95089eab

SHA256
8ef563ef17bfbb577405d15a3261b4974762fd9a4a6230e726082482203b4c11

SHA512
5361fbb929ccb3ca791d6609a88483f0b1ac56853cf681f023fbec7b05c60300a834703efa735b550707720185a56e69a8d59fb6fc0a25141c56160e14ff9bb8

Download Submit
C:\Users\Admin\AppData\Roaming\ros.exe

Filesize
1.2MB

MD5
bf1a47c0c4b257f6f491ba7864bfd32a

SHA1
3af41b456f935675bf47091ceef592db95089eab

SHA256
8ef563ef17bfbb577405d15a3261b4974762fd9a4a6230e726082482203b4c11

SHA512
5361fbb929ccb3ca791d6609a88483f0b1ac56853cf681f023fbec7b05c60300a834703efa735b550707720185a56e69a8d59fb6fc0a25141c56160e14ff9bb8

Download Submit
C:\Users\Admin\AppData\Roaming\ros.exe

Filesize
1.2MB

MD5
bf1a47c0c4b257f6f491ba7864bfd32a

SHA1
3af41b456f935675bf47091ceef592db95089eab

SHA256
8ef563ef17bfbb577405d15a3261b4974762fd9a4a6230e726082482203b4c11

SHA512
5361fbb929ccb3ca791d6609a88483f0b1ac56853cf681f023fbec7b05c60300a834703efa735b550707720185a56e69a8d59fb6fc0a25141c56160e14ff9bb8

Download Submit
\Users\Admin\AppData\Roaming\ros.exe

Filesize
1.2MB

MD5
bf1a47c0c4b257f6f491ba7864bfd32a

SHA1
3af41b456f935675bf47091ceef592db95089eab

SHA256
8ef563ef17bfbb577405d15a3261b4974762fd9a4a6230e726082482203b4c11

SHA512
5361fbb929ccb3ca791d6609a88483f0b1ac56853cf681f023fbec7b05c60300a834703efa735b550707720185a56e69a8d59fb6fc0a25141c56160e14ff9bb8

Download Submit
memory/268-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-61-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-78-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-72-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-62-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/268-65-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-67-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/268-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1116-55-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download
memory/1116-59-0x0000000001FB0000-0x0000000001FB6000-memory.dmp

Filesize
24KB

Download
memory/1116-57-0x0000000002070000-0x00000000020B0000-memory.dmp

Filesize
256KB

Download
memory/1116-58-0x0000000005E70000-0x0000000005F62000-memory.dmp

Filesize
968KB

Download
memory/1116-60-0x0000000005F60000-0x0000000005FE0000-memory.dmp

Filesize
512KB

Download
memory/1116-56-0x0000000000650000-0x0000000000668000-memory.dmp

Filesize
96KB

Download
memory/1116-54-0x0000000000860000-0x0000000000990000-memory.dmp

Filesize
1.2MB

Download
memory/1544-97-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-102-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-92-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1544-113-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-112-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-99-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-96-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-100-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-101-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-111-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-103-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-104-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-109-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1544-110-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1816-83-0x0000000000B40000-0x0000000000B80000-memory.dmp

Filesize
256KB

Download
memory/1816-81-0x0000000001160000-0x0000000001290000-memory.dmp

Filesize
1.2MB

Download
memory/1816-82-0x0000000000B40000-0x0000000000B80000-memory.dmp

Filesize
256KB

Download