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Overview
overview
7Static
static
7Krampus.rar
windows7-x64
3Krampus.rar
windows10-2004-x64
3krampus.exe
windows7-x64
7krampus.exe
windows10-2004-x64
7libcurl.dll
windows7-x64
1libcurl.dll
windows10-2004-x64
1scripts/In...eld.js
windows7-x64
3scripts/In...eld.js
windows10-2004-x64
3scripts/autosaved.lua
windows7-x64
3scripts/autosaved.lua
windows10-2004-x64
3scripts/be...pt.lua
windows7-x64
3scripts/be...pt.lua
windows10-2004-x64
3scripts/dark dex.js
windows7-x64
3scripts/dark dex.js
windows10-2004-x64
3workspace/...le.txt
windows7-x64
1workspace/...le.txt
windows10-2004-x64
1workspace/...le.txt
windows7-x64
1workspace/...le.txt
windows10-2004-x64
1workspace/...le.txt
windows7-x64
1workspace/...le.txt
windows10-2004-x64
1workspace/..._2.txt
windows7-x64
1workspace/..._2.txt
windows10-2004-x64
1workspace/...le.txt
windows7-x64
1workspace/...le.txt
windows10-2004-x64
1workspace/...le.txt
windows7-x64
1workspace/...le.txt
windows10-2004-x64
1workspace/....rbxlx
windows7-x64
3workspace/....rbxlx
windows10-2004-x64
3workspace/...87.txt
windows7-x64
1workspace/...87.txt
windows10-2004-x64
1workspace/....rbxlx
windows7-x64
3workspace/....rbxlx
windows10-2004-x64
3Analysis
-
max time kernel
103s -
max time network
19s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
07/08/2024, 15:00
Behavioral task
behavioral1
Sample
Krampus.rar
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
Krampus.rar
Resource
win10v2004-20240802-en
Behavioral task
behavioral3
Sample
krampus.exe
Resource
win7-20240705-en
Behavioral task
behavioral4
Sample
krampus.exe
Resource
win10v2004-20240802-en
Behavioral task
behavioral5
Sample
libcurl.dll
Resource
win7-20240704-en
Behavioral task
behavioral6
Sample
libcurl.dll
Resource
win10v2004-20240802-en
Behavioral task
behavioral7
Sample
scripts/Infinite yield.js
Resource
win7-20240729-en
Behavioral task
behavioral8
Sample
scripts/Infinite yield.js
Resource
win10v2004-20240802-en
Behavioral task
behavioral9
Sample
scripts/autosaved.lua
Resource
win7-20240705-en
Behavioral task
behavioral10
Sample
scripts/autosaved.lua
Resource
win10v2004-20240802-en
Behavioral task
behavioral11
Sample
scripts/betascript.lua
Resource
win7-20240708-en
Behavioral task
behavioral12
Sample
scripts/betascript.lua
Resource
win10v2004-20240802-en
Behavioral task
behavioral13
Sample
scripts/dark dex.js
Resource
win7-20240704-en
Behavioral task
behavioral14
Sample
scripts/dark dex.js
Resource
win10v2004-20240802-en
Behavioral task
behavioral15
Sample
workspace/.tests/appendfile.txt
Resource
win7-20240705-en
Behavioral task
behavioral16
Sample
workspace/.tests/appendfile.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral17
Sample
workspace/.tests/delfile.txt
Resource
win7-20240704-en
Behavioral task
behavioral18
Sample
workspace/.tests/delfile.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral19
Sample
workspace/.tests/isfile.txt
Resource
win7-20240708-en
Behavioral task
behavioral20
Sample
workspace/.tests/isfile.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral21
Sample
workspace/.tests/listfiles/test_2.txt
Resource
win7-20240705-en
Behavioral task
behavioral22
Sample
workspace/.tests/listfiles/test_2.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral23
Sample
workspace/.tests/readfile.txt
Resource
win7-20240705-en
Behavioral task
behavioral24
Sample
workspace/.tests/readfile.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral25
Sample
workspace/.tests/writefile.txt
Resource
win7-20240708-en
Behavioral task
behavioral26
Sample
workspace/.tests/writefile.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral27
Sample
workspace/4483381587.rbxlx
Resource
win7-20240708-en
Behavioral task
behavioral28
Sample
workspace/4483381587.rbxlx
Resource
win10v2004-20240802-en
Behavioral task
behavioral29
Sample
workspace/4483381587.txt
Resource
win7-20240704-en
Behavioral task
behavioral30
Sample
workspace/4483381587.txt
Resource
win10v2004-20240802-en
Behavioral task
behavioral31
Sample
workspace/5972698540.rbxlx
Resource
win7-20240704-en
Behavioral task
behavioral32
Sample
workspace/5972698540.rbxlx
Resource
win10v2004-20240802-en
General
-
Target
workspace/5972698540.rbxlx
-
Size
9.4MB
-
MD5
02202c7b8652c63a685f1c95354f6dc6
-
SHA1
bc1ad1ba92ed8db4996f49d6608fbffc6815fd18
-
SHA256
881badb8cfb346b25575c5ddf7ba6f2195a2947ebedf9e2450abefe10b94d253
-
SHA512
e7fb58a1d8e78df7879b8eb667360f9978ea2c8537f47afb7ad38877ba214fa88c6d75040db2c04eb2379d82fb46977d431e4bade149f629b339ac4ce13351b7
-
SSDEEP
196608:hhjDn+cccccccccqqqqqoqccqqqqqqv5Du7ccccccLLccccLLcccccLLccccc77g:0
Malware Config
Signatures
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AcroRd32.exe -
Modifies registry class 9 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_Classes\Local Settings rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\rbxlx_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\.rbxlx rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\rbxlx_auto_file\shell\Read rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\rbxlx_auto_file\shell\Read\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\rbxlx_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\"" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\rbxlx_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\.rbxlx\ = "rbxlx_auto_file" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000_CLASSES\rbxlx_auto_file\shell rundll32.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2896 AcroRd32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2896 AcroRd32.exe 2896 AcroRd32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1052 wrote to memory of 2468 1052 cmd.exe 30 PID 1052 wrote to memory of 2468 1052 cmd.exe 30 PID 1052 wrote to memory of 2468 1052 cmd.exe 30 PID 2468 wrote to memory of 2896 2468 rundll32.exe 31 PID 2468 wrote to memory of 2896 2468 rundll32.exe 31 PID 2468 wrote to memory of 2896 2468 rundll32.exe 31 PID 2468 wrote to memory of 2896 2468 rundll32.exe 31
Processes
-
C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\workspace\5972698540.rbxlx1⤵
- Suspicious use of WriteProcessMemory
PID:1052 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\workspace\5972698540.rbxlx2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2468 -
C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\workspace\5972698540.rbxlx"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2896
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
-
Filesize
3KB
MD57dd69c44172c6cacf1175846a8f61162
SHA145ea2330c60fd8e0558b88bb9537aa4de02f1c86
SHA256146c1339f7c953ddc0a13c2cf2f40c21fd0f9a1686ed4a29ca7a737988f0037c
SHA5121d65e508ca603341603bd8b6c84f74f043bc7f4996fb055d0c29eabc2f45c6121b53f97284e0bd7aeadf1893fda2b9e2493cd4d051cd823affc9b1d5d9d3ca87