3968a850f5bc70d954bb5609d929f181a6f05a117fa3be4531cbd96cedfde5d6

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19-12-2024 22:25

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

LBB_ReflectiveDll_DllMain.dll
Size

113KB
MD5

ab5bdca69285d4838af12117c910bfde
SHA1

208060cf988f1702124504bae0c6a4addbeb6db3
SHA256

5594fea724aa3a124b259e81999f20affecb2238f7e517c56c450a3a311ab2bd
SHA512

33c8cb31dd142defcf52ddadaa540d86d8fdd586ad3f0f280d90c66279cf09229edde08efb9daac81383f65ba171b86344c4e5c6343b02270bfa92201e08f547
SSDEEP

3072:+/fNzovq5EKHttru48dBVFktgraAyHXU:+/Gvq5EKH6zdrFPraA

Score

9^/10

defense_evasion discovery ransomware

Malware Config

Signatures

Renames multiple (173) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Executes dropped EXE 2 IoCs

pid	Process
2416	BAC7.tmp
2168	BB64.tmp

Loads dropped DLL 2 IoCs

pid	Process
2120	rundll32.exe
2120	rundll32.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\kF0wnCN24.bmp"	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\kF0wnCN24.bmp"	rundll32.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 9 IoCs

pid	Process
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2416	BAC7.tmp
2120	rundll32.exe
2168	BB64.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BB64.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies Control Panel 2 IoCs

evasion

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\WallpaperStyle = "10"	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\kF0wnCN24\DefaultIcon	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\kF0wnCN24	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\kF0wnCN24\DefaultIcon\ = "C:\\ProgramData\\kF0wnCN24.ico"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.kF0wnCN24	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.kF0wnCN24\ = "kF0wnCN24"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe
2120	rundll32.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeAssignPrimaryTokenPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeDebugPrivilege	2120	rundll32.exe
Token: 36	2120	rundll32.exe
Token: SeImpersonatePrivilege	2120	rundll32.exe
Token: SeIncBasePriorityPrivilege	2120	rundll32.exe
Token: SeIncreaseQuotaPrivilege	2120	rundll32.exe
Token: 33	2120	rundll32.exe
Token: SeManageVolumePrivilege	2120	rundll32.exe
Token: SeProfSingleProcessPrivilege	2120	rundll32.exe
Token: SeRestorePrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSystemProfilePrivilege	2120	rundll32.exe
Token: SeTakeOwnershipPrivilege	2120	rundll32.exe
Token: SeShutdownPrivilege	2120	rundll32.exe
Token: SeDebugPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeBackupPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe
Token: SeSecurityPrivilege	2120	rundll32.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 1840 wrote to memory of 2120	1840	rundll32.exe	30
PID 2120 wrote to memory of 2416	2120	rundll32.exe	35
PID 2120 wrote to memory of 2416	2120	rundll32.exe	35
PID 2120 wrote to memory of 2416	2120	rundll32.exe	35
PID 2120 wrote to memory of 2416	2120	rundll32.exe	35
PID 2120 wrote to memory of 2416	2120	rundll32.exe	35
PID 2120 wrote to memory of 2168	2120	rundll32.exe	36
PID 2120 wrote to memory of 2168	2120	rundll32.exe	36
PID 2120 wrote to memory of 2168	2120	rundll32.exe	36
PID 2120 wrote to memory of 2168	2120	rundll32.exe	36
PID 2120 wrote to memory of 2168	2120	rundll32.exe	36
PID 2168 wrote to memory of 2140	2168	BB64.tmp	37
PID 2168 wrote to memory of 2140	2168	BB64.tmp	37
PID 2168 wrote to memory of 2140	2168	BB64.tmp	37
PID 2168 wrote to memory of 2140	2168	BB64.tmp	37

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\LBB_ReflectiveDll_DllMain.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\LBB_ReflectiveDll_DllMain.dll,#1
  2⤵
  - Loads dropped DLL
  - Sets desktop wallpaper using registry
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Modifies Control Panel
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2120
- - C:\ProgramData\BAC7.tmp
    "C:\ProgramData\BAC7.tmp"
    3⤵
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    PID:2416
- - C:\ProgramData\BB64.tmp
    "C:\ProgramData\BB64.tmp"
    3⤵
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2168
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\BB64.tmp >> NUL
      4⤵
      System Location Discovery: System Language Discovery
      PID:2140

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
PID:2716

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x148
1⤵
PID:1644

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\kF0wnCN24.README.txt

Filesize
6KB

MD5
e9e055513f2ee8963ab197d25c8ffe6e

SHA1
ab474812ee3eb241c0bb418d0423261744ec381d

SHA256
c369b0b92dfbc78f8583d0e60d3fea2f1370232949c887676e1b3faaec38c78f

SHA512
e582ec06a9d0c8e02df9cf8e6b5e60cedb90303c5c325b0e675562d79c9af1c6f2d9058abc1dd2a66d2866c3df2c89f2e5b561344d14e1aadb0d2d42e4c123d1

Download Submit
\ProgramData\BAC7.tmp

Filesize
14KB

MD5
294e9f64cb1642dd89229fff0592856b

SHA1
97b148c27f3da29ba7b18d6aee8a0db9102f47c9

SHA256
917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

SHA512
b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

Download Submit
memory/2120-227-0x0000000003A60000-0x0000000003AA0000-memory.dmp

Filesize
256KB

Download
memory/2120-0-0x00000000002C0000-0x0000000000300000-memory.dmp

Filesize
256KB

Download
memory/2168-238-0x000000007EF80000-0x000000007EF81000-memory.dmp

Filesize
4KB

Download
memory/2168-241-0x000000007EF60000-0x000000007EF61000-memory.dmp

Filesize
4KB

Download
memory/2168-240-0x000000007EF40000-0x000000007EF41000-memory.dmp

Filesize
4KB

Download
memory/2168-239-0x000000007EF20000-0x000000007EF21000-memory.dmp

Filesize
4KB

Download
memory/2168-237-0x0000000002300000-0x0000000002340000-memory.dmp

Filesize
256KB

Download
memory/2168-236-0x0000000002300000-0x0000000002340000-memory.dmp

Filesize
256KB

Download
memory/2168-234-0x000000007EFA0000-0x000000007EFA1000-memory.dmp

Filesize
4KB

Download
memory/2416-224-0x0000000002130000-0x0000000002170000-memory.dmp

Filesize
256KB

Download
memory/2416-223-0x0000000002130000-0x0000000002170000-memory.dmp

Filesize
256KB

Download
memory/2416-222-0x000000007EFA0000-0x000000007EFA1000-memory.dmp

Filesize
4KB

Download
memory/2416-225-0x000000007EF80000-0x000000007EF81000-memory.dmp

Filesize
4KB

Download
memory/2416-226-0x000000007EF20000-0x000000007EF21000-memory.dmp

Filesize
4KB

Download