Analysis
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max time kernel
233s -
max time network
296s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
30-05-2024 12:28
Behavioral task
behavioral1
Sample
XClient.exe
Resource
win10v2004-20240226-en
General
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Target
XClient.exe
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Size
62KB
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MD5
ec8785fe24a3652b48f3c26305fbe895
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SHA1
55d19ee15841fc8f9862d1c5eed0884b7c0b4363
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SHA256
43acaa8dd6ef2afc04a0c5de6b4c6ffb879e79af8c4ebcc033c9a230ffa7944a
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SHA512
20e792dfe3d50159bc67267ab067dbdf4b29c52cd865bb7fbacfcb6e1b0a52a10a9fe5efb09b3f074c01b06feb8354ee293ecdb0b1c843e530f6d2cd2278824d
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SSDEEP
1536:mI/gDbWOkAlgI7RxE6kkbftYV5j6M5O5Jf7:mIAiAlN7RxEVkbfOhO5R7
Malware Config
Extracted
xworm
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Install_directory
%AppData%
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install_file
Runtime Broker.exe
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pastebin_url
https://pastebin.com/raw/kYPYyCCf
Signatures
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Detect Xworm Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/2432-1-0x00000000001A0000-0x00000000001B6000-memory.dmp family_xworm C:\Users\Admin\AppData\Roaming\Runtime Broker.exe 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 668 powershell.exe 1988 powershell.exe 2300 powershell.exe 2484 powershell.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
XClient.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation XClient.exe -
Drops startup file 2 IoCs
Processes:
XClient.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk XClient.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Runtime Broker.lnk XClient.exe -
Executes dropped EXE 2 IoCs
Processes:
Runtime Broker.exeRuntime Broker.exepid process 452 Runtime Broker.exe 444 Runtime Broker.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
XClient.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\Users\\Admin\\AppData\\Roaming\\Runtime Broker.exe" XClient.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 232 timeout.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
powershell.exepowershell.exepowershell.exepowershell.exepid process 668 powershell.exe 668 powershell.exe 1988 powershell.exe 1988 powershell.exe 2300 powershell.exe 2300 powershell.exe 2484 powershell.exe 2484 powershell.exe -
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
XClient.exepowershell.exepowershell.exepowershell.exepowershell.exeRuntime Broker.exeRuntime Broker.exedescription pid process Token: SeDebugPrivilege 2432 XClient.exe Token: SeDebugPrivilege 668 powershell.exe Token: SeDebugPrivilege 1988 powershell.exe Token: SeDebugPrivilege 2300 powershell.exe Token: SeDebugPrivilege 2484 powershell.exe Token: SeDebugPrivilege 2432 XClient.exe Token: SeDebugPrivilege 452 Runtime Broker.exe Token: SeDebugPrivilege 444 Runtime Broker.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
XClient.execmd.exedescription pid process target process PID 2432 wrote to memory of 668 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 668 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 1988 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 1988 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 2300 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 2300 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 2484 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 2484 2432 XClient.exe powershell.exe PID 2432 wrote to memory of 4940 2432 XClient.exe schtasks.exe PID 2432 wrote to memory of 4940 2432 XClient.exe schtasks.exe PID 2432 wrote to memory of 1988 2432 XClient.exe schtasks.exe PID 2432 wrote to memory of 1988 2432 XClient.exe schtasks.exe PID 2432 wrote to memory of 1912 2432 XClient.exe cmd.exe PID 2432 wrote to memory of 1912 2432 XClient.exe cmd.exe PID 1912 wrote to memory of 232 1912 cmd.exe timeout.exe PID 1912 wrote to memory of 232 1912 cmd.exe timeout.exe -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\XClient.exe"C:\Users\Admin\AppData\Local\Temp\XClient.exe"1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2432 -
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\XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:668
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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 'XClient.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1988
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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:\Users\Admin\AppData\Roaming\Runtime Broker.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2300
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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 'Runtime Broker.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2484
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"2⤵
- Creates scheduled task(s)
PID:4940
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /delete /f /tn "Runtime Broker"2⤵PID:1988
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3605.tmp.bat""2⤵
- Suspicious use of WriteProcessMemory
PID:1912 -
C:\Windows\system32\timeout.exetimeout 33⤵
- Delays execution with timeout.exe
PID:232
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C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:452
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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=4080 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:81⤵PID:2392
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C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:444
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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Filesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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Filesize
944B
MD562623d22bd9e037191765d5083ce16a3
SHA14a07da6872672f715a4780513d95ed8ddeefd259
SHA25695d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010
SHA5129a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992
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Filesize
944B
MD54f473e15a0686d0c819ad40b5f232368
SHA1a769892ae2e8203e7d4a992a317189b56723da33
SHA25653d6c0d9a801d45fefdcec9b3ecf217fef683efc4e40ba9c72f0116ee4d20237
SHA512d9b43132432078d5496688717253e58e7caab0dcbd20fc41fa8a718d11d699e93ee198f18be4243ed34bcf8912e1377888fe72ae5b26d920e765ab523f0bdf55
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Filesize
944B
MD550d3033f2bc3a3774c469d03e71a79a9
SHA122027b1d52085de99b3bffa276530fea5d961471
SHA2562987e99ec7fa17bd4ab7de3cb4dc62645e1052012a5a357904d6fc6db9054147
SHA512ecf7ab1a9e4192454a3e24c60453fd702a8c648e00078fc933b9182f4a3d3c10c6f5da622a5729b35727e6ddc8837029caddcaf76f56e805b9744253b56da5d8
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
159B
MD5aeb8f9994d906674bf3b2399b4c5eeb2
SHA170a97c3e9bccc9194f35a89cbc3811546910ccf0
SHA2567e7cd6272bf38d3505a88365408e0b226afc409c5c953e2c86f4e9d33a657425
SHA51295bc024726e96c20bbc44b67b525d50f8ada5af32ac6daa4a102cfcf6ef0660cd2fae351ae4b03c60a96a4aee855f8a8d3c806762cc001416bbf3620bf3837ba
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Filesize
62KB
MD5ec8785fe24a3652b48f3c26305fbe895
SHA155d19ee15841fc8f9862d1c5eed0884b7c0b4363
SHA25643acaa8dd6ef2afc04a0c5de6b4c6ffb879e79af8c4ebcc033c9a230ffa7944a
SHA51220e792dfe3d50159bc67267ab067dbdf4b29c52cd865bb7fbacfcb6e1b0a52a10a9fe5efb09b3f074c01b06feb8354ee293ecdb0b1c843e530f6d2cd2278824d