Overview
overview
7Static
static
3iLemon/lpk.dll
windows7-x64
7iLemon/lpk.dll
windows10-2004-x64
7iLemon/set...1].exe
windows7-x64
7iLemon/set...1].exe
windows10-2004-x64
7$PLUGINSDI...LL.dll
windows7-x64
3$PLUGINSDI...LL.dll
windows10-2004-x64
3$PLUGINSDI...LL.dll
windows7-x64
3$PLUGINSDI...LL.dll
windows10-2004-x64
3$PLUGINSDI...em.dll
windows7-x64
3$PLUGINSDI...em.dll
windows10-2004-x64
3$PLUGINSDI...gs.dll
windows7-x64
3$PLUGINSDI...gs.dll
windows10-2004-x64
3$PLUGINSDI...dl.dll
windows7-x64
3$PLUGINSDI...dl.dll
windows10-2004-x64
31.3.1.1002...ar.exe
windows7-x64
61.3.1.1002...ar.exe
windows10-2004-x64
71.3.1.1002...ce.exe
windows7-x64
11.3.1.1002...ce.exe
windows10-2004-x64
11.3.1.1002...er.exe
windows7-x64
11.3.1.1002...er.exe
windows10-2004-x64
11.3.1.1002...64.exe
windows7-x64
11.3.1.1002...64.exe
windows10-2004-x64
11.3.1.1002...op.exe
windows7-x64
61.3.1.1002...op.exe
windows10-2004-x64
71.3.1.1002...te.exe
windows7-x64
11.3.1.1002...te.exe
windows10-2004-x64
1ShellExtHelper.dll
windows7-x64
7ShellExtHelper.dll
windows10-2004-x64
7ShellExtHelper64.dll
windows7-x64
7ShellExtHelper64.dll
windows10-2004-x64
7iLemon.exe
windows7-x64
6iLemon.exe
windows10-2004-x64
6Analysis
-
max time kernel
141s -
max time network
129s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
15-06-2024 06:58
Static task
static1
Behavioral task
behavioral1
Sample
iLemon/lpk.dll
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
iLemon/lpk.dll
Resource
win10v2004-20240226-en
Behavioral task
behavioral3
Sample
iLemon/setup_1.3.1.1002_qd[1].exe
Resource
win7-20240221-en
Behavioral task
behavioral4
Sample
iLemon/setup_1.3.1.1002_qd[1].exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral5
Sample
$PLUGINSDIR/FindProcDLL.dll
Resource
win7-20240611-en
Behavioral task
behavioral6
Sample
$PLUGINSDIR/FindProcDLL.dll
Resource
win10v2004-20240611-en
Behavioral task
behavioral7
Sample
$PLUGINSDIR/KillProcDLL.dll
Resource
win7-20240611-en
Behavioral task
behavioral8
Sample
$PLUGINSDIR/KillProcDLL.dll
Resource
win10v2004-20240611-en
Behavioral task
behavioral9
Sample
$PLUGINSDIR/System.dll
Resource
win7-20240221-en
Behavioral task
behavioral10
Sample
$PLUGINSDIR/System.dll
Resource
win10v2004-20240508-en
Behavioral task
behavioral11
Sample
$PLUGINSDIR/nsDialogs.dll
Resource
win7-20240508-en
Behavioral task
behavioral12
Sample
$PLUGINSDIR/nsDialogs.dll
Resource
win10v2004-20240611-en
Behavioral task
behavioral13
Sample
$PLUGINSDIR/nsisdl.dll
Resource
win7-20240221-en
Behavioral task
behavioral14
Sample
$PLUGINSDIR/nsisdl.dll
Resource
win10v2004-20240611-en
Behavioral task
behavioral15
Sample
1.3.1.1002/LemonCalendar.exe
Resource
win7-20240611-en
Behavioral task
behavioral16
Sample
1.3.1.1002/LemonCalendar.exe
Resource
win10v2004-20240611-en
Behavioral task
behavioral17
Sample
1.3.1.1002/LemonService.exe
Resource
win7-20240508-en
Behavioral task
behavioral18
Sample
1.3.1.1002/LemonService.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral19
Sample
1.3.1.1002/RunningHelper.exe
Resource
win7-20240611-en
Behavioral task
behavioral20
Sample
1.3.1.1002/RunningHelper.exe
Resource
win10v2004-20240611-en
Behavioral task
behavioral21
Sample
1.3.1.1002/RunningHelper64.exe
Resource
win7-20240508-en
Behavioral task
behavioral22
Sample
1.3.1.1002/RunningHelper64.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral23
Sample
1.3.1.1002/SmartDesktop.exe
Resource
win7-20231129-en
Behavioral task
behavioral24
Sample
1.3.1.1002/SmartDesktop.exe
Resource
win10v2004-20240508-en
Behavioral task
behavioral25
Sample
1.3.1.1002/SmartNote.exe
Resource
win7-20240611-en
Behavioral task
behavioral26
Sample
1.3.1.1002/SmartNote.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral27
Sample
ShellExtHelper.dll
Resource
win7-20240508-en
Behavioral task
behavioral28
Sample
ShellExtHelper.dll
Resource
win10v2004-20240508-en
Behavioral task
behavioral29
Sample
ShellExtHelper64.dll
Resource
win7-20240221-en
Behavioral task
behavioral30
Sample
ShellExtHelper64.dll
Resource
win10v2004-20240508-en
Behavioral task
behavioral31
Sample
iLemon.exe
Resource
win7-20240221-en
Behavioral task
behavioral32
Sample
iLemon.exe
Resource
win10v2004-20240611-en
General
-
Target
1.3.1.1002/LemonCalendar.exe
-
Size
968KB
-
MD5
6316d6cbb865715433fabb26ef40475c
-
SHA1
26fe47aa5a8cba00724437f48ff2a945f6438388
-
SHA256
e85fcae499aa5adb7655fb969faeeddfd29d533848c2bb024d3cd5cbdabb1800
-
SHA512
8c199d0b84272a5604884895dbf48fe48ca3000d7a6010a51d1e65ad4f708e733077453c61ea11dc2cf16ea1f552feb86468d1ff3cc5feea1aae75084fd93587
-
SSDEEP
12288:8GMJPzFmrIyaAn+FJqbtMGapym5mWaaj6jIRnA3CKvFmdY8/riVjcP55CI7kqhpf:8Tx3Ak6KUm5gSRorX4bCI7kG4J7Y
Malware Config
Signatures
-
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
LemonCalendar.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation LemonCalendar.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
LemonCalendar.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\柠檬桌面 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\iLemon.exe\" /from=autorun" LemonCalendar.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
LemonCalendar.exedescription ioc process File opened for modification \??\PhysicalDrive0 LemonCalendar.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious use of FindShellTrayWindow 8 IoCs
Processes:
RunningHelper64.exeLemonCalendar.exepid process 2044 RunningHelper64.exe 3588 LemonCalendar.exe 3588 LemonCalendar.exe 3588 LemonCalendar.exe 3588 LemonCalendar.exe 3588 LemonCalendar.exe 3588 LemonCalendar.exe 3588 LemonCalendar.exe -
Suspicious use of SendNotifyMessage 2 IoCs
Processes:
LemonCalendar.exepid process 3588 LemonCalendar.exe 3588 LemonCalendar.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
RunningHelper64.exepid process 2044 RunningHelper64.exe -
Suspicious use of WriteProcessMemory 2 IoCs
Processes:
LemonCalendar.exedescription pid process target process PID 3588 wrote to memory of 2044 3588 LemonCalendar.exe RunningHelper64.exe PID 3588 wrote to memory of 2044 3588 LemonCalendar.exe RunningHelper64.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\LemonCalendar.exe"C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\LemonCalendar.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Writes to the Master Boot Record (MBR)
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\RunningHelper64.exe"C:\Users\Admin\AppData\Local\Temp\1.3.1.1002\RunningHelper64.exe" /dll_launch=Install_Force2⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
-
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4156,i,16866810346450717340,3849854439116899380,262144 --variations-seed-version --mojo-platform-channel-handle=4356 /prefetch:81⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
-
memory/2044-0-0x000001649B0D0000-0x000001649B183000-memory.dmpFilesize
716KB