Analysis
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max time kernel
149s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
26-05-2024 15:38
Behavioral task
behavioral1
Sample
siski.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
siski.exe
Resource
win10-20240404-en
Behavioral task
behavioral3
Sample
siski.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral4
Sample
siski.exe
Resource
win11-20240426-en
General
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Target
siski.exe
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Size
88KB
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MD5
a39a9dbad030467f590832a6ab2ff349
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SHA1
23b9baed2339451a3dc0d710024e4f010fc89be8
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SHA256
db17812e10401ae3cdc44e07272758c155e215ccc2d4859833d7a26e38706d92
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SHA512
1ea795f981ecf0abb66c2fc2e1704e5292e319d8ff8d24a7e52b05b03125dc24d46f3b80a5f89acedd7361f0adfc7150a3707f9d41a2b4202e7cd014d359232c
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SSDEEP
1536:f62bFTb1Y/aBjS2jklqQZyoJPbUu6Ejbg/YVk36H2VLOO/V2G/cR:t5TyCZjks0ymbttnrVkxLOO2McR
Malware Config
Extracted
xworm
character-estimate.gl.at.ply.gg:61192
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Install_directory
%ProgramData%
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install_file
Chrome.exe
Signatures
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Detect Xworm Payload 1 IoCs
Processes:
resource yara_rule behavioral3/memory/636-1-0x0000000000570000-0x000000000058C000-memory.dmp family_xworm -
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepid process 1364 powershell.exe 2764 powershell.exe 1036 powershell.exe 4232 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
siski.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation siski.exe -
Drops startup file 2 IoCs
Processes:
siski.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Chrome.lnk siski.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Chrome.lnk siski.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
siski.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Chrome = "C:\\ProgramData\\Chrome.exe" siski.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 7 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exesiski.exepid process 4232 powershell.exe 4232 powershell.exe 1364 powershell.exe 1364 powershell.exe 2764 powershell.exe 2764 powershell.exe 1036 powershell.exe 1036 powershell.exe 636 siski.exe -
Suspicious use of AdjustPrivilegeToken 6 IoCs
Processes:
siski.exepowershell.exepowershell.exepowershell.exepowershell.exedescription pid process Token: SeDebugPrivilege 636 siski.exe Token: SeDebugPrivilege 4232 powershell.exe Token: SeDebugPrivilege 1364 powershell.exe Token: SeDebugPrivilege 2764 powershell.exe Token: SeDebugPrivilege 1036 powershell.exe Token: SeDebugPrivilege 636 siski.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
siski.exepid process 636 siski.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
siski.exedescription pid process target process PID 636 wrote to memory of 4232 636 siski.exe powershell.exe PID 636 wrote to memory of 4232 636 siski.exe powershell.exe PID 636 wrote to memory of 1364 636 siski.exe powershell.exe PID 636 wrote to memory of 1364 636 siski.exe powershell.exe PID 636 wrote to memory of 2764 636 siski.exe powershell.exe PID 636 wrote to memory of 2764 636 siski.exe powershell.exe PID 636 wrote to memory of 1036 636 siski.exe powershell.exe PID 636 wrote to memory of 1036 636 siski.exe powershell.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\siski.exe"C:\Users\Admin\AppData\Local\Temp\siski.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:636 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\siski.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4232
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'siski.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1364
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Chrome.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2764
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Chrome.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1036
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4388 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:81⤵PID:1680
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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Filesize
944B
MD56d3e9c29fe44e90aae6ed30ccf799ca8
SHA1c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA2562360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
SHA51260c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
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Filesize
944B
MD565a68df1062af34622552c4f644a5708
SHA16f6ecf7b4b635abb0b132d95dac2759dc14b50af
SHA256718dc2f5f4a6dbb7fab7f3db05bd7f602fb16526caae7084ab46c3ab4e7bad35
SHA5124e460eb566032942547b58411222dd26ae300a95f83cf5ae6df58ebd28594341123611b348bd4031a33bc7f38307d5cb8fb677bba8c896919e3eee677a104d4d
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Filesize
944B
MD5ef72c47dbfaae0b9b0d09f22ad4afe20
SHA15357f66ba69b89440b99d4273b74221670129338
SHA256692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f
SHA5127514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82