remcos | 1bdb2bb10581f1ff96824ff8e8ee07de970bf051d63c2c9d216ad9744dc75804

Analysis

max time kernel
150s
max time network
157s
platform
windows7_x64
resource
win7v20210408
submitted
24/08/2021, 06:30

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General

Target
8852b3e6c42fc2e82ad6f7c1bac0b773.exe
Size 553KB
Sample210824-51fcbv6rha
SHA256 1bdb2bb10581f1ff96824ff8e8ee07de970bf051d63c2c9d216ad9744dc75804
MD5 8852b3e6c42fc2e82ad6f7c1bac0b773
SHA1 06c3eab70feb601fd7940f69aaf4b13905d7ae06
SHA512 bcf9712ab78382cc59556a67c43864da0a8c057be22f9621a2c6294005eaaa6e02af1906b1947e1ddb20e46afedba07b6a42239e71236e5a299479e37b403231
MD5 SHA1 SHA512

Score

10^/10

remcos doggy persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

DOGGY

xamp.zapto.org:50501
xamp.zapto.org:29881

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
win32.exe
copy_folder
win32
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_jtieyyfiud
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
win32
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
544	win32.exe
1768	win32.exe

Loads dropped DLL 1 IoCs

pid	Process
748	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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\win32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\win32\\win32.exe\""	win32.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\	8852b3e6c42fc2e82ad6f7c1bac0b773.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\win32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\win32\\win32.exe\""	8852b3e6c42fc2e82ad6f7c1bac0b773.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\	win32.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1088 set thread context of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 544 set thread context of 1768	544	win32.exe	38

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1532	schtasks.exe
1800	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
824	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe
Token: SeDebugPrivilege	544	win32.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 1532	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	29
PID 1088 wrote to memory of 1532	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	29
PID 1088 wrote to memory of 1532	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	29
PID 1088 wrote to memory of 1532	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	29
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1088 wrote to memory of 1288	1088	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	31
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 1288 wrote to memory of 748	1288	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	32
PID 748 wrote to memory of 824	748	cmd.exe	34
PID 748 wrote to memory of 824	748	cmd.exe	34
PID 748 wrote to memory of 824	748	cmd.exe	34
PID 748 wrote to memory of 824	748	cmd.exe	34
PID 748 wrote to memory of 544	748	cmd.exe	35
PID 748 wrote to memory of 544	748	cmd.exe	35
PID 748 wrote to memory of 544	748	cmd.exe	35
PID 748 wrote to memory of 544	748	cmd.exe	35
PID 544 wrote to memory of 1800	544	win32.exe	36
PID 544 wrote to memory of 1800	544	win32.exe	36
PID 544 wrote to memory of 1800	544	win32.exe	36
PID 544 wrote to memory of 1800	544	win32.exe	36
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38
PID 544 wrote to memory of 1768	544	win32.exe	38

C:\Users\Admin\AppData\Local\Temp\8852b3e6c42fc2e82ad6f7c1bac0b773.exe
"C:\Users\Admin\AppData\Local\Temp\8852b3e6c42fc2e82ad6f7c1bac0b773.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1088
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ujVCkOfyw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5B69.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1532
- C:\Users\Admin\AppData\Local\Temp\8852b3e6c42fc2e82ad6f7c1bac0b773.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:748
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      Runs ping.exe
      PID:824
  - - C:\Users\Admin\AppData\Roaming\win32\win32.exe
      "C:\Users\Admin\AppData\Roaming\win32\win32.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:544
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ujVCkOfyw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE5EC.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:1800
    - - C:\Users\Admin\AppData\Roaming\win32\win32.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        
        PID:1768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/544-85-0x0000000000240000-0x0000000000241000-memory.dmp

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memory/544-84-0x0000000004D10000-0x0000000004D11000-memory.dmp

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memory/544-81-0x0000000000EF0000-0x0000000000EF1000-memory.dmp

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memory/1088-64-0x0000000000220000-0x0000000000222000-memory.dmp

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memory/1088-67-0x0000000000A30000-0x0000000000A4A000-memory.dmp

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memory/1088-63-0x00000000001C0000-0x00000000001C1000-memory.dmp

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memory/1088-62-0x0000000004EF0000-0x0000000004EF1000-memory.dmp

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memory/1088-65-0x0000000004440000-0x0000000004481000-memory.dmp

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memory/1088-66-0x0000000005D60000-0x0000000005DC8000-memory.dmp

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memory/1088-60-0x0000000000A50000-0x0000000000A51000-memory.dmp

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memory/1288-70-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1288-72-0x0000000075DA1000-0x0000000075DA3000-memory.dmp

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memory/1288-76-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1768-94-0x0000000000400000-0x0000000000417000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads