Analysis
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max time kernel
16s -
max time network
17s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
10-11-2024 17:54
Static task
static1
Behavioral task
behavioral1
Sample
EXMservice.exe
Resource
win10v2004-20241007-en
General
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Target
EXMservice.exe
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Size
12.0MB
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MD5
aab9c36b98e2aeff996b3b38db070527
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SHA1
4c2910e1e9b643f16269a2e59e3ada80fa70e5fa
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SHA256
c148cc14f15b71a2d3f5e6bce6b706744f6b373a7e6c090c14f46f81d2d6e82f
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SHA512
0db75756a041a7cda6b384718581aaf11e6873614465dd56e81f17ad171cffe380e288a3c2ee540222190392904921f26df8a1d66d4108051c60fc8e5b2df779
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SSDEEP
6144:tgIFnaVf5qSsmMLN6+kjn7nPZDt7FY7n16EUkKUBnf6R3Xnd:4fA5y7PhNi71PfKUV6R3X
Malware Config
Extracted
xworm
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Install_directory
%LocalAppData%
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install_file
USB.exe
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pastebin_url
https://pastebin.com/raw/ZnhxAV6a
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telegram
https://api.telegram.org/bot7538644364:AAHEMV7mmxz6PSRgzo0ORf3_n0BaazmrAqk/sendMessage?chat_id=7541917888
Extracted
asyncrat
Default
127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
https://api.telegram.org/bot7538644364:AAHEMV7mmxz6PSRgzo0ORf3_n0BaazmrAqk/sendMessage?chat_id=7541917888
AsyncMutex_6SI8OkPnk
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delay
3
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install
false
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install_folder
%AppData%
Signatures
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Asyncrat family
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Detect Xworm Payload 2 IoCs
resource yara_rule behavioral1/files/0x0009000000023c90-6.dat family_xworm behavioral1/memory/2608-57-0x0000000000730000-0x000000000075A000-memory.dmp family_xworm -
StormKitty
StormKitty is an open source info stealer written in C#.
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StormKitty payload 2 IoCs
resource yara_rule behavioral1/files/0x0007000000023c98-35.dat family_stormkitty behavioral1/memory/1888-64-0x0000000000280000-0x00000000002BE000-memory.dmp family_stormkitty -
Stormkitty family
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Xworm family
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Async RAT payload 1 IoCs
resource yara_rule behavioral1/files/0x0007000000023c98-35.dat family_asyncrat -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation EXMservice.exe Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation msedge.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msedge.lnk msedge.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msedge.lnk msedge.exe -
Executes dropped EXE 2 IoCs
pid Process 2608 msedge.exe 1888 svchost.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 7 IoCs
description ioc Process File created C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 20 pastebin.com 21 pastebin.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs
Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.
description ioc Process Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh netsh.exe -
System Location Discovery: System Language Discovery 1 TTPs 8 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 cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language chcp.com Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language netsh.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language chcp.com Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language findstr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language netsh.exe -
System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs
Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.
pid Process 3208 cmd.exe 2564 netsh.exe -
Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000 taskmgr.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A taskmgr.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName taskmgr.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3788 schtasks.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2608 msedge.exe -
Suspicious behavior: EnumeratesProcesses 59 IoCs
pid Process 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1888 svchost.exe 1888 svchost.exe 1828 taskmgr.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1828 taskmgr.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1828 taskmgr.exe 1828 taskmgr.exe 2608 msedge.exe 2608 msedge.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 1888 svchost.exe 1888 svchost.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 1828 taskmgr.exe 2608 msedge.exe 2608 msedge.exe 1888 svchost.exe 1888 svchost.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 2608 msedge.exe 1828 taskmgr.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1888 svchost.exe 1828 taskmgr.exe -
Suspicious use of AdjustPrivilegeToken 8 IoCs
description pid Process Token: SeDebugPrivilege 2608 msedge.exe Token: SeDebugPrivilege 1888 svchost.exe Token: SeDebugPrivilege 1828 taskmgr.exe Token: SeSystemProfilePrivilege 1828 taskmgr.exe Token: SeCreateGlobalPrivilege 1828 taskmgr.exe Token: SeDebugPrivilege 2608 msedge.exe Token: 33 1828 taskmgr.exe Token: SeIncBasePriorityPrivilege 1828 taskmgr.exe -
Suspicious use of FindShellTrayWindow 39 IoCs
pid Process 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe -
Suspicious use of SendNotifyMessage 38 IoCs
pid Process 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe 1828 taskmgr.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2608 msedge.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 4696 wrote to memory of 2608 4696 EXMservice.exe 84 PID 4696 wrote to memory of 2608 4696 EXMservice.exe 84 PID 4696 wrote to memory of 1888 4696 EXMservice.exe 85 PID 4696 wrote to memory of 1888 4696 EXMservice.exe 85 PID 4696 wrote to memory of 1888 4696 EXMservice.exe 85 PID 2608 wrote to memory of 3788 2608 msedge.exe 99 PID 2608 wrote to memory of 3788 2608 msedge.exe 99 PID 1888 wrote to memory of 3208 1888 svchost.exe 105 PID 1888 wrote to memory of 3208 1888 svchost.exe 105 PID 1888 wrote to memory of 3208 1888 svchost.exe 105 PID 3208 wrote to memory of 3616 3208 cmd.exe 107 PID 3208 wrote to memory of 3616 3208 cmd.exe 107 PID 3208 wrote to memory of 3616 3208 cmd.exe 107 PID 3208 wrote to memory of 2564 3208 cmd.exe 108 PID 3208 wrote to memory of 2564 3208 cmd.exe 108 PID 3208 wrote to memory of 2564 3208 cmd.exe 108 PID 3208 wrote to memory of 3020 3208 cmd.exe 109 PID 3208 wrote to memory of 3020 3208 cmd.exe 109 PID 3208 wrote to memory of 3020 3208 cmd.exe 109 PID 1888 wrote to memory of 244 1888 svchost.exe 110 PID 1888 wrote to memory of 244 1888 svchost.exe 110 PID 1888 wrote to memory of 244 1888 svchost.exe 110 PID 244 wrote to memory of 2124 244 cmd.exe 112 PID 244 wrote to memory of 2124 244 cmd.exe 112 PID 244 wrote to memory of 2124 244 cmd.exe 112 PID 244 wrote to memory of 1980 244 cmd.exe 113 PID 244 wrote to memory of 1980 244 cmd.exe 113 PID 244 wrote to memory of 1980 244 cmd.exe 113 -
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\EXMservice.exe"C:\Users\Admin\AppData\Local\Temp\EXMservice.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4696 -
C:\Users\Admin\msedge.exe"C:\Users\Admin\msedge.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2608 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "msedge" /tr "C:\Users\Admin\AppData\Local\msedge.exe"3⤵
- Scheduled Task/Job: Scheduled Task
PID:3788
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C:\Users\Admin\svchost.exe"C:\Users\Admin\svchost.exe"2⤵
- Executes dropped EXE
- Drops desktop.ini file(s)
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1888 -
C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All3⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Wi-Fi Discovery
- Suspicious use of WriteProcessMemory
PID:3208 -
C:\Windows\SysWOW64\chcp.comchcp 650014⤵
- System Location Discovery: System Language Discovery
PID:3616
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C:\Windows\SysWOW64\netsh.exenetsh wlan show profile4⤵
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Wi-Fi Discovery
PID:2564
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C:\Windows\SysWOW64\findstr.exefindstr All4⤵
- System Location Discovery: System Language Discovery
PID:3020
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:244 -
C:\Windows\SysWOW64\chcp.comchcp 650014⤵
- System Location Discovery: System Language Discovery
PID:2124
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C:\Windows\SysWOW64\netsh.exenetsh wlan show networks mode=bssid4⤵
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
PID:1980
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1828
Network
MITRE ATT&CK Enterprise v15
Persistence
Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\System\Process.txt
Filesize4KB
MD558942ac5e9325d3fc0d4e62b4e906978
SHA1d4f2eaa3f324c43da6496ec2186c03e0843fa733
SHA256c77efa8a217ea9d3af1afc5a06ab7f6ef9a390127ca4a6998b5bab0c809283b8
SHA512b6abce0128fe9feb3ec60c5373e3e0774c54a670f6b02206c47fe3c93a85403fec52f4d7399834663a81e0d2ff6ae9c3a6cbdffa109a8d136630c250c1f3a0b1
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Filesize
961B
MD510ea7d80cca17c7fac2c12e8a4bee45d
SHA132a25b0fc574f5cfe2980a964a6ab6e3c94bf8be
SHA256086c1c5a20e08ef7d74cc9f81d9b39db3f3b54cf3a44972f76a7045ec9e129e6
SHA512dc46925e70638cad1e40b1956e2ba8bf834040f7bc252785b760bd2ffd9d80348a01e8a255fd198c0717b3886c92800e140d83d5a963fc80ea350ba3fc9bf8e2
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Filesize
146KB
MD5f1c2525da4f545e783535c2875962c13
SHA192bf515741775fac22690efc0e400f6997eba735
SHA2569e6985fdb3bfa539f3d6d6fca9aaf18356c28a00604c4f961562c34fa9f11d0f
SHA51256308ac106caa84798925661406a25047df8d90e4b65b587b261010293587938fa922fbb2cfdedfe71139e16bfcf38e54bb31cbcc00cd244db15d756459b6133
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Filesize
226KB
MD51bea6c3f126cf5446f134d0926705cee
SHA102c49933d0c2cc068402a93578d4768745490d58
SHA2561d69b5b87c4cd1251c5c94461a455659febb683eab0ebd97dd30da2319ffc638
SHA512eb9f423f6adb5e686a53f5f197e6b08455f8048d965a9ec850838fdf4724ef87f68945c435ace5a48a9a7226006a348e97586335d0246ea0dc898a412dea5df3