Analysis
- max time kernel
149s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
01/11/2022, 01:35
General
- Target 92f3b670b34b4f8085a8ed8ecefa869e105f077c1b17ffc253fe65d307fe8efc.exe
- Size 3.4MB
- Sample221101-bzxbsafaa7
- SHA256 92f3b670b34b4f8085a8ed8ecefa869e105f077c1b17ffc253fe65d307fe8efc
Malware Config
Extracted
-
remcos
-
keep
-
search.akamaimicro.com:443
-
search.akamaimicro.com:80
-
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
rms-UBKU50
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
startup_value
Remcos
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Modifies registry class 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 2 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of SetWindowsHookEx 8 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\92f3b670b34b4f8085a8ed8ecefa869e105f077c1b17ffc253fe65d307fe8efc.exe"C:\Users\Admin\AppData\Local\Temp\92f3b670b34b4f8085a8ed8ecefa869e105f077c1b17ffc253fe65d307fe8efc.exe"1⤵
- Checks computer location settings
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\OfficeC2Runs.exe"C:\Users\Admin\AppData\Local\Temp\OfficeC2Runs.exe"2⤵
- Executes dropped EXE
-
-
C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Èí¼þ¿ª·¢¹¤³Ìʦ£ºÀ¶¹µÄӦƸÉêÇë.docx" /o ""2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
OfficeC2Runs.exe
OfficeC2Runs.exe
Èí¼þ¿ª·¢¹¤³Ìʦ£ºÀ¶¹µÄӦƸÉêÇë.docx
memory/204-144-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-156-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-155-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-154-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-140-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-141-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-142-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-143-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-153-0x00007FF963870000-0x00007FF963880000-memory.dmp
memory/204-145-0x00007FF9617E0000-0x00007FF9617F0000-memory.dmp
memory/204-146-0x00007FF9617E0000-0x00007FF9617F0000-memory.dmp
memory/444-148-0x00000000029D0000-0x0000000002A47000-memory.dmp
memory/444-149-0x0000000000400000-0x0000000000587000-memory.dmp
memory/444-150-0x0000000000400000-0x0000000000587000-memory.dmp
memory/444-138-0x0000000000400000-0x0000000000587000-memory.dmp
memory/3736-133-0x00007FF6372E0000-0x00007FF637A25000-memory.dmp
memory/3736-139-0x00007FF6372E0000-0x00007FF637A25000-memory.dmp
memory/3736-132-0x00007FF6372E0000-0x00007FF637A25000-memory.dmp