remcos | 1bdb2bb10581f1ff96824ff8e8ee07de970bf051d63c2c9d216ad9744dc75804

Analysis

max time kernel
156s
max time network
161s
platform
windows10_x64
resource
win10v20210408
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
3040	win32.exe
2280	win32.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	win32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\win32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\win32\\win32.exe\""	win32.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	8852b3e6c42fc2e82ad6f7c1bac0b773.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\win32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\win32\\win32.exe\""	8852b3e6c42fc2e82ad6f7c1bac0b773.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3108 set thread context of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3040 set thread context of 2280	3040	win32.exe	87

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
3164	schtasks.exe
2888	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1856	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe
Token: SeDebugPrivilege	3040	win32.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 3164	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	78
PID 3108 wrote to memory of 3164	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	78
PID 3108 wrote to memory of 3164	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	78
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 3108 wrote to memory of 1080	3108	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	80
PID 1080 wrote to memory of 3856	1080	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	81
PID 1080 wrote to memory of 3856	1080	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	81
PID 1080 wrote to memory of 3856	1080	8852b3e6c42fc2e82ad6f7c1bac0b773.exe	81
PID 3856 wrote to memory of 1856	3856	cmd.exe	83
PID 3856 wrote to memory of 1856	3856	cmd.exe	83
PID 3856 wrote to memory of 1856	3856	cmd.exe	83
PID 3856 wrote to memory of 3040	3856	cmd.exe	84
PID 3856 wrote to memory of 3040	3856	cmd.exe	84
PID 3856 wrote to memory of 3040	3856	cmd.exe	84
PID 3040 wrote to memory of 2888	3040	win32.exe	85
PID 3040 wrote to memory of 2888	3040	win32.exe	85
PID 3040 wrote to memory of 2888	3040	win32.exe	85
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87
PID 3040 wrote to memory of 2280	3040	win32.exe	87

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:3108
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ujVCkOfyw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE95C.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3164
- C:\Users\Admin\AppData\Local\Temp\8852b3e6c42fc2e82ad6f7c1bac0b773.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1080
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3856
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      Runs ping.exe
      PID:1856
  - - 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:3040
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ujVCkOfyw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7494.tmp"
        5⤵
        Creates scheduled task(s)
        
        PID:2888
    - - C:\Users\Admin\AppData\Roaming\win32\win32.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        
        PID:2280

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/1080-128-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/1080-132-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2280-154-0x0000000000400000-0x0000000000417000-memory.dmp

Download

memory/3040-142-0x00000000054B0000-0x00000000054B1000-memory.dmp

Download

memory/3040-143-0x0000000002DC0000-0x0000000002DC1000-memory.dmp

Download

memory/3108-121-0x0000000005B40000-0x0000000005B42000-memory.dmp

Download

memory/3108-114-0x0000000000D60000-0x0000000000D61000-memory.dmp

Download

memory/3108-120-0x00000000057A0000-0x00000000057A1000-memory.dmp

Download

memory/3108-119-0x0000000003190000-0x0000000003191000-memory.dmp

Download

memory/3108-118-0x00000000057C0000-0x00000000057C1000-memory.dmp

Download

memory/3108-122-0x0000000008E20000-0x0000000008E21000-memory.dmp

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memory/3108-125-0x0000000007530000-0x000000000754A000-memory.dmp

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memory/3108-117-0x0000000005EB0000-0x0000000005EB1000-memory.dmp

Download

memory/3108-124-0x00000000075A0000-0x0000000007608000-memory.dmp

Download

memory/3108-116-0x00000000059A0000-0x00000000059A1000-memory.dmp

Download

memory/3108-123-0x0000000007420000-0x0000000007461000-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