Analysis
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max time kernel
25s -
max time network
22s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
12-02-2024 16:42
Static task
static1
Behavioral task
behavioral1
Sample
documents 53 ACH 775-53 ABM 912.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
documents 53 ACH 775-53 ABM 912.exe
Resource
win10v2004-20231222-en
Behavioral task
behavioral3
Sample
$PLUGINSDIR/System.dll
Resource
win7-20231215-en
Behavioral task
behavioral4
Sample
$PLUGINSDIR/System.dll
Resource
win10v2004-20231215-en
General
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Target
documents 53 ACH 775-53 ABM 912.exe
-
Size
1.1MB
-
MD5
dbac614bdf786dd5741aaab9ea8006d7
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SHA1
4f49b045fe3b043d5f8541939ef66d611094b10d
-
SHA256
36bd481c4fa0c81766a46d47dc47bd538c2bbf91254092fe6f5cbea1d3bcb4d2
-
SHA512
966a2038cb16dead59f3b44379d8fb2bb35f5888b10c74cafb8a28b8e9a029b0a5ec0d3c7d17a5915351014c7307e3989efb17120781dccbf7815a00d5789526
-
SSDEEP
24576:KS5HuM8IqoMzMxDHEHsGhXwy54j3BjqgMQUWhypBR:f55XOHsG/54j3ZftUNBR
Malware Config
Extracted
remcos
Top
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audio_folder
MicRecords
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audio_record_time
5
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connect_delay
0
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connect_interval
1
-
copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
true
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install_flag
false
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keylog_crypt
false
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keylog_file
mqerms.dat
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keylog_flag
false
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keylog_path
%AppData%
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mouse_option
false
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mutex
alpwovnb-G3F5OR
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
-
Loads dropped DLL 1 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exepid process 2656 documents 53 ACH 775-53 ABM 912.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
wab.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\samfundshjlper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Wips34\\kronprinserne.exe" wab.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
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Drops file in System32 directory 2 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exedescription ioc process File opened for modification C:\Windows\SysWOW64\lohoch.gim documents 53 ACH 775-53 ABM 912.exe File opened for modification C:\Windows\SysWOW64\threshes.uds documents 53 ACH 775-53 ABM 912.exe -
Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
Processes:
wab.exepid process 5384 wab.exe 5384 wab.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exewab.exepid process 2656 documents 53 ACH 775-53 ABM 912.exe 5384 wab.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exedescription pid process target process PID 2656 set thread context of 5384 2656 documents 53 ACH 775-53 ABM 912.exe wab.exe -
Drops file in Program Files directory 1 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exedescription ioc process File opened for modification C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio documents 53 ACH 775-53 ABM 912.exe -
Drops file in Windows directory 3 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exedescription ioc process File opened for modification C:\Windows\resources\0409\enchasing.Pet documents 53 ACH 775-53 ABM 912.exe File opened for modification C:\Windows\Fonts\Forters67\Elektrotekniker.wra documents 53 ACH 775-53 ABM 912.exe File opened for modification C:\Windows\Tnkepauses.tro documents 53 ACH 775-53 ABM 912.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exepid process 2656 documents 53 ACH 775-53 ABM 912.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
wab.exepid process 5384 wab.exe -
Suspicious use of WriteProcessMemory 5 IoCs
Processes:
documents 53 ACH 775-53 ABM 912.exedescription pid process target process PID 2656 wrote to memory of 5384 2656 documents 53 ACH 775-53 ABM 912.exe wab.exe PID 2656 wrote to memory of 5384 2656 documents 53 ACH 775-53 ABM 912.exe wab.exe PID 2656 wrote to memory of 5384 2656 documents 53 ACH 775-53 ABM 912.exe wab.exe PID 2656 wrote to memory of 5384 2656 documents 53 ACH 775-53 ABM 912.exe wab.exe PID 2656 wrote to memory of 5384 2656 documents 53 ACH 775-53 ABM 912.exe wab.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\documents 53 ACH 775-53 ABM 912.exe"C:\Users\Admin\AppData\Local\Temp\documents 53 ACH 775-53 ABM 912.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\windows mail\wab.exe"C:\Users\Admin\AppData\Local\Temp\documents 53 ACH 775-53 ABM 912.exe"2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\nsn4D08.tmp\System.dllFilesize
11KB
MD517ed1c86bd67e78ade4712be48a7d2bd
SHA11cc9fe86d6d6030b4dae45ecddce5907991c01a0
SHA256bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
SHA5120cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5
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memory/2656-24-0x00000000053C0000-0x000000000604F000-memory.dmpFilesize
12.6MB
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memory/2656-19-0x00000000053C0000-0x000000000604F000-memory.dmpFilesize
12.6MB
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memory/2656-20-0x00000000773E1000-0x0000000077501000-memory.dmpFilesize
1.1MB
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memory/2656-21-0x0000000010000000-0x0000000010006000-memory.dmpFilesize
24KB
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memory/5384-49-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-53-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-25-0x00000000773E1000-0x0000000077501000-memory.dmpFilesize
1.1MB
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memory/5384-39-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-41-0x00000000773E1000-0x0000000077501000-memory.dmpFilesize
1.1MB
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memory/5384-40-0x0000000002460000-0x00000000030EF000-memory.dmpFilesize
12.6MB
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memory/5384-42-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-43-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-44-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-45-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-46-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-47-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-48-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-22-0x0000000002460000-0x00000000030EF000-memory.dmpFilesize
12.6MB
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memory/5384-50-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-51-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-52-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-23-0x0000000077468000-0x0000000077469000-memory.dmpFilesize
4KB
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memory/5384-54-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-55-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-56-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-57-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-58-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-59-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-60-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-61-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-62-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-63-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-64-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-65-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-66-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-67-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB
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memory/5384-68-0x0000000001200000-0x0000000002454000-memory.dmpFilesize
18.3MB