Overview
overview
8Static
static
3Nezur_External.zip
windows7-x64
1Nezur_External.zip
windows10-2004-x64
6Nezur.exe
windows7-x64
8Nezur.exe
windows10-2004-x64
8auto_load.txt
windows7-x64
1auto_load.txt
windows10-2004-x64
1configs/arsenal.cfg
windows7-x64
3configs/arsenal.cfg
windows10-2004-x64
3configs/autosave.cfg
windows7-x64
3configs/autosave.cfg
windows10-2004-x64
3configs/co...ox.cfg
windows7-x64
3configs/co...ox.cfg
windows10-2004-x64
3configs/dahood.cfg
windows7-x64
3configs/dahood.cfg
windows10-2004-x64
3configs/jailbird.cfg
windows7-x64
3configs/jailbird.cfg
windows10-2004-x64
3configs/universal.cfg
windows7-x64
3configs/universal.cfg
windows10-2004-x64
3configs/weaponry.cfg
windows7-x64
3configs/weaponry.cfg
windows10-2004-x64
3Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
25/02/2024, 00:18
Static task
static1
Behavioral task
behavioral1
Sample
Nezur_External.zip
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
Nezur_External.zip
Resource
win10v2004-20240221-en
Behavioral task
behavioral3
Sample
Nezur.exe
Resource
win7-20240220-en
Behavioral task
behavioral4
Sample
Nezur.exe
Resource
win10v2004-20240221-en
Behavioral task
behavioral5
Sample
auto_load.txt
Resource
win7-20240221-en
Behavioral task
behavioral6
Sample
auto_load.txt
Resource
win10v2004-20240221-en
Behavioral task
behavioral7
Sample
configs/arsenal.cfg
Resource
win7-20240221-en
Behavioral task
behavioral8
Sample
configs/arsenal.cfg
Resource
win10v2004-20240221-en
Behavioral task
behavioral9
Sample
configs/autosave.cfg
Resource
win7-20240221-en
Behavioral task
behavioral10
Sample
configs/autosave.cfg
Resource
win10v2004-20240221-en
Behavioral task
behavioral11
Sample
configs/counterblox.cfg
Resource
win7-20240221-en
Behavioral task
behavioral12
Sample
configs/counterblox.cfg
Resource
win10v2004-20240221-en
Behavioral task
behavioral13
Sample
configs/dahood.cfg
Resource
win7-20240221-en
Behavioral task
behavioral14
Sample
configs/dahood.cfg
Resource
win10v2004-20240221-en
Behavioral task
behavioral15
Sample
configs/jailbird.cfg
Resource
win7-20240221-en
Behavioral task
behavioral16
Sample
configs/jailbird.cfg
Resource
win10v2004-20240221-en
Behavioral task
behavioral17
Sample
configs/universal.cfg
Resource
win7-20240221-en
Behavioral task
behavioral18
Sample
configs/universal.cfg
Resource
win10v2004-20240221-en
Behavioral task
behavioral19
Sample
configs/weaponry.cfg
Resource
win7-20240221-en
Behavioral task
behavioral20
Sample
configs/weaponry.cfg
Resource
win10v2004-20240221-en
General
-
Target
configs/jailbird.cfg
-
Size
995B
-
MD5
2ea9fe525de145a918ac1b461f536145
-
SHA1
656881eac2aea4b4f4e045afcab7d7338eb7e72b
-
SHA256
7cd075c3b2abdfe1dc36769d06eb3b734e1f4dc19122402e54d1b4b2e62b7c00
-
SHA512
506d5bc75e9cb14028109dd0366b5ba5585afdecac03620dbb401b967d0bbec5721b63d1f4e209b89b7001654bce25e359f93d67fd430a225ebec4e3ceaeffa3
Malware Config
Signatures
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Modifies registry class 9 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\cfg_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\cfg_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\cfg_auto_file\shell\Read rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\cfg_auto_file\shell rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\cfg_auto_file\shell\Read\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\cfg_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\"" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.cfg rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000_CLASSES\.cfg\ = "cfg_auto_file" rundll32.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2192 AcroRd32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2192 AcroRd32.exe 2192 AcroRd32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1032 wrote to memory of 2684 1032 cmd.exe 29 PID 1032 wrote to memory of 2684 1032 cmd.exe 29 PID 1032 wrote to memory of 2684 1032 cmd.exe 29 PID 2684 wrote to memory of 2192 2684 rundll32.exe 30 PID 2684 wrote to memory of 2192 2684 rundll32.exe 30 PID 2684 wrote to memory of 2192 2684 rundll32.exe 30 PID 2684 wrote to memory of 2192 2684 rundll32.exe 30
Processes
-
C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\configs\jailbird.cfg1⤵
- Suspicious use of WriteProcessMemory
PID:1032 -
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\configs\jailbird.cfg2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2684 -
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\configs\jailbird.cfg"3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2192
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
-
Filesize
3KB
MD5ff98095585a29e19757d87a295173655
SHA127521e6c991455dd32a09dca3806ab23f067f38f
SHA256d1a3dc015251e4f9f27baac2d4ede1fe4a5d00dd9ea48ba7fa2aa434a633b670
SHA512ac7d76235441ed3745574d460e0ddfa02ede351f5a3d543a7e8a20d1f147a48b408de106f7c718e30627976aac13e7779cd41c24cdfc006263f1b8894c214d50