Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
18-08-2024 20:56
Static task
static1
Behavioral task
behavioral1
Sample
EXMservice.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
EXMservice.exe
Resource
win10v2004-20240802-en
General
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Target
EXMservice.exe
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Size
12.0MB
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MD5
f189114f5f8504a1aeb97a90e71ea429
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SHA1
a2d029f042000b7e3ec175e1e365d9bf20396092
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SHA256
31709442f1ff903433dec01461829a0c05b62f0e7cab81f2efcd1a0b0845d748
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SHA512
5f939df2c5bc1f3c4f5b1fd835a7ab882d49fed5c5ebd7a41deba37b3f7ba423d194ccaad39aa3032d9454570d8863bdb93cca9c99ee12cf64dbc478b2dfcbbb
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SSDEEP
6144:pcBqNKm+UQqA9uAXTNpWKc9SNweSuRQjbvmpFETPMK3nYpbLYhZ+:pkCKm+UQqAP7WKc9SNavmpOTZ3WuM
Malware Config
Extracted
xworm
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Install_directory
%ProgramData%
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install_file
MicrosoftEdgeUpdate.exe
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pastebin_url
https://pastebin.com/raw/ZnhxAV6a
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telegram
https://api.telegram.org/bot6701075763:AAGkvv2CpqBxGihH8FtOkSA7Uxy35GZpAFI/sendMessage?chat_id=5991331733
Extracted
asyncrat
Default
127.0.0.1:6606
127.0.0.1:7707
127.0.0.1:8808
https://api.telegram.org/bot6701075763:AAGkvv2CpqBxGihH8FtOkSA7Uxy35GZpAFI/sendMessage?chat_id=5991331733
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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Detect Xworm Payload 2 IoCs
resource yara_rule behavioral2/files/0x00090000000233eb-6.dat family_xworm behavioral2/memory/1160-21-0x00000000002A0000-0x00000000002BC000-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 behavioral2/files/0x0007000000023447-17.dat family_stormkitty behavioral2/memory/2152-28-0x0000000000190000-0x00000000001CE000-memory.dmp family_stormkitty -
Async RAT payload 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023447-17.dat family_asyncrat -
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
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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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation EXMservice.exe Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation MicrosoftEdgeUpdate.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MicrosoftEdgeUpdate.lnk MicrosoftEdgeUpdate.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MicrosoftEdgeUpdate.lnk MicrosoftEdgeUpdate.exe -
Executes dropped EXE 4 IoCs
pid Process 1160 MicrosoftEdgeUpdate.exe 2152 svchost.exe 5096 MicrosoftEdgeUpdate.exe 1968 MicrosoftEdgeUpdate.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicrosoftEdgeUpdate = "C:\\ProgramData\\MicrosoftEdgeUpdate.exe" MicrosoftEdgeUpdate.exe -
Drops desktop.ini file(s) 7 IoCs
description ioc Process File created C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 45 IoCs
flow ioc 84 pastebin.com 129 pastebin.com 137 pastebin.com 55 pastebin.com 81 pastebin.com 120 pastebin.com 121 pastebin.com 124 pastebin.com 125 pastebin.com 65 pastebin.com 67 pastebin.com 88 pastebin.com 103 pastebin.com 127 pastebin.com 90 pastebin.com 98 pastebin.com 22 pastebin.com 32 pastebin.com 47 pastebin.com 49 pastebin.com 66 pastebin.com 76 pastebin.com 104 pastebin.com 123 pastebin.com 21 pastebin.com 31 pastebin.com 70 pastebin.com 72 pastebin.com 75 pastebin.com 87 pastebin.com 132 pastebin.com 133 pastebin.com 46 pastebin.com 69 pastebin.com 85 pastebin.com 24 pastebin.com 42 pastebin.com 94 pastebin.com 117 pastebin.com 130 pastebin.com 135 pastebin.com 73 pastebin.com 92 pastebin.com 95 pastebin.com 118 pastebin.com -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 33 icanhazip.com -
Looks up geolocation information via web service
Uses a legitimate geolocation service to find the infected system's geolocation info.
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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 2024 cmd.exe 3680 netsh.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0 svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier svchost.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 3104 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 27 IoCs
pid Process 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe 2152 svchost.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 1160 MicrosoftEdgeUpdate.exe Token: SeDebugPrivilege 2152 svchost.exe Token: SeDebugPrivilege 5096 MicrosoftEdgeUpdate.exe Token: SeDebugPrivilege 1968 MicrosoftEdgeUpdate.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 756 wrote to memory of 1160 756 EXMservice.exe 84 PID 756 wrote to memory of 1160 756 EXMservice.exe 84 PID 756 wrote to memory of 2152 756 EXMservice.exe 85 PID 756 wrote to memory of 2152 756 EXMservice.exe 85 PID 756 wrote to memory of 2152 756 EXMservice.exe 85 PID 1160 wrote to memory of 3104 1160 MicrosoftEdgeUpdate.exe 94 PID 1160 wrote to memory of 3104 1160 MicrosoftEdgeUpdate.exe 94 PID 2152 wrote to memory of 2024 2152 svchost.exe 99 PID 2152 wrote to memory of 2024 2152 svchost.exe 99 PID 2152 wrote to memory of 2024 2152 svchost.exe 99 PID 2024 wrote to memory of 5028 2024 cmd.exe 101 PID 2024 wrote to memory of 5028 2024 cmd.exe 101 PID 2024 wrote to memory of 5028 2024 cmd.exe 101 PID 2024 wrote to memory of 3680 2024 cmd.exe 102 PID 2024 wrote to memory of 3680 2024 cmd.exe 102 PID 2024 wrote to memory of 3680 2024 cmd.exe 102 PID 2024 wrote to memory of 1340 2024 cmd.exe 103 PID 2024 wrote to memory of 1340 2024 cmd.exe 103 PID 2024 wrote to memory of 1340 2024 cmd.exe 103 PID 2152 wrote to memory of 1740 2152 svchost.exe 104 PID 2152 wrote to memory of 1740 2152 svchost.exe 104 PID 2152 wrote to memory of 1740 2152 svchost.exe 104 PID 1740 wrote to memory of 1712 1740 cmd.exe 106 PID 1740 wrote to memory of 1712 1740 cmd.exe 106 PID 1740 wrote to memory of 1712 1740 cmd.exe 106 PID 1740 wrote to memory of 4380 1740 cmd.exe 107 PID 1740 wrote to memory of 4380 1740 cmd.exe 107 PID 1740 wrote to memory of 4380 1740 cmd.exe 107 -
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:756 -
C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe"C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1160 -
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "MicrosoftEdgeUpdate" /tr "C:\ProgramData\MicrosoftEdgeUpdate.exe"3⤵
- Scheduled Task/Job: Scheduled Task
PID:3104
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C:\Users\Admin\AppData\Local\svchost.exe"C:\Users\Admin\AppData\Local\svchost.exe"2⤵
- Executes dropped EXE
- Drops desktop.ini file(s)
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2152 -
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:2024 -
C:\Windows\SysWOW64\chcp.comchcp 650014⤵
- System Location Discovery: System Language Discovery
PID:5028
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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:3680
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C:\Windows\SysWOW64\findstr.exefindstr All4⤵
- System Location Discovery: System Language Discovery
PID:1340
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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:1740 -
C:\Windows\SysWOW64\chcp.comchcp 650014⤵
- System Location Discovery: System Language Discovery
PID:1712
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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:4380
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C:\ProgramData\MicrosoftEdgeUpdate.exeC:\ProgramData\MicrosoftEdgeUpdate.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5096
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C:\ProgramData\MicrosoftEdgeUpdate.exeC:\ProgramData\MicrosoftEdgeUpdate.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1968
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event 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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Filesize
86KB
MD551cdbf80fae38e82aa1c6ac3c86081a8
SHA1b4a00a40555f6d7655a80ef0aaab920c35994743
SHA25670e63eb524c1d6dbe4f4fa276d3f4d2756108cb5a4f4ebb9a6264fcbd5d4a73b
SHA512aa69c54770a36eba26b1408aaf0338975b4bd1b3dd118de71d81882671c86fc6b0c80567c67ffb6cd3c1a3f98ac02fe6ac5d9495a03531bcff1ecc61574c85e1
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Filesize
654B
MD52ff39f6c7249774be85fd60a8f9a245e
SHA1684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA5121d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1
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Filesize
5B
MD5073ddf1464a739c88592e9b2e82b0282
SHA17f8612331142b1eb01d861550403b6e0b260796b
SHA25616ab30b5e9095a00df3cb49104da1101013dec43e166ac2bc930e57b10b5aac8
SHA51209d316ff5d4cb3b1ac8bf8c280b51d5ceb5e7bb18c8147010e1c19b54d2119a5ee57994405712871fdfe9a90d8404890db46f663cf5f81dffc9aa6a827e4e364
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C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\Browsers\Firefox\Bookmarks.txt
Filesize105B
MD52e9d094dda5cdc3ce6519f75943a4ff4
SHA15d989b4ac8b699781681fe75ed9ef98191a5096c
SHA256c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142
SHA512d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7
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C:\Users\Admin\AppData\Local\f264d17220d4bb49ec07eb0a702c8273\Admin@ERHQJVYQ_en-US\System\Process.txt
Filesize4KB
MD50431841f4a709cd524dd244e8bdefe77
SHA14f517423050155ca6e081fca7e70db3e96c5b5a9
SHA256ede3fa966be0c27bd381236543545c9d9be51020b0533ded59b32202761a0949
SHA512f99eaac0f183d0a01d48baba6cd6ef286c803ed1da51ab787cd2ae707a28b6801f1864dd292cd73c16c123d2cb04401a5df84ece5fdc732f132f58cd1cb9d8cd
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Filesize
225KB
MD58008775094d446eaed43a423cd8a26f9
SHA14b8ef16e4a70fed23dc20cc5e27566df1e06af04
SHA25648a06f8dbe0c56894b38bb3489c8ed5243d246328c512ee265bc31de441b5e1f
SHA5126d9f2dca0d9032702971b339b7df65efab1c95d76e89044cf36ed43ef3116d21d1203d1561bd5fb4bd838d4df3dfbd240e2c89b715400f7a89037a3757326792