3968a850f5bc70d954bb5609d929f181a6f05a117fa3be4531cbd96cedfde5d6

Analysis

max time kernel
93s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-12-2024 22:23

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General

Target

LBB_ReflectiveDll_DllMain.dll
Size

113KB
MD5

ab5bdca69285d4838af12117c910bfde
SHA1

208060cf988f1702124504bae0c6a4addbeb6db3
SHA256

5594fea724aa3a124b259e81999f20affecb2238f7e517c56c450a3a311ab2bd
SHA512

33c8cb31dd142defcf52ddadaa540d86d8fdd586ad3f0f280d90c66279cf09229edde08efb9daac81383f65ba171b86344c4e5c6343b02270bfa92201e08f547
SSDEEP

3072:+/fNzovq5EKHttru48dBVFktgraAyHXU:+/Gvq5EKH6zdrFPraA

Score

7^/10

defense_evasion discovery

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	B45C.tmp

Deletes itself 1 IoCs

pid	Process
2688	B45C.tmp

Executes dropped EXE 1 IoCs

pid	Process
2688	B45C.tmp

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

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
1116	rundll32.exe
1116	rundll32.exe
2688	B45C.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	B45C.tmp

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 6 IoCs

pid	Process
1116	rundll32.exe
1116	rundll32.exe
1116	rundll32.exe
1116	rundll32.exe
1116	rundll32.exe
1116	rundll32.exe

Suspicious behavior: RenamesItself 26 IoCs

pid	Process
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp
2688	B45C.tmp

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeAssignPrimaryTokenPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeDebugPrivilege	1116	rundll32.exe
Token: 36	1116	rundll32.exe
Token: SeImpersonatePrivilege	1116	rundll32.exe
Token: SeIncBasePriorityPrivilege	1116	rundll32.exe
Token: SeIncreaseQuotaPrivilege	1116	rundll32.exe
Token: 33	1116	rundll32.exe
Token: SeManageVolumePrivilege	1116	rundll32.exe
Token: SeProfSingleProcessPrivilege	1116	rundll32.exe
Token: SeRestorePrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSystemProfilePrivilege	1116	rundll32.exe
Token: SeTakeOwnershipPrivilege	1116	rundll32.exe
Token: SeShutdownPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeDebugPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeAssignPrimaryTokenPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeDebugPrivilege	1116	rundll32.exe
Token: 36	1116	rundll32.exe
Token: SeImpersonatePrivilege	1116	rundll32.exe
Token: SeIncBasePriorityPrivilege	1116	rundll32.exe
Token: SeIncreaseQuotaPrivilege	1116	rundll32.exe
Token: 33	1116	rundll32.exe
Token: SeManageVolumePrivilege	1116	rundll32.exe
Token: SeProfSingleProcessPrivilege	1116	rundll32.exe
Token: SeRestorePrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSystemProfilePrivilege	1116	rundll32.exe
Token: SeTakeOwnershipPrivilege	1116	rundll32.exe
Token: SeShutdownPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeSecurityPrivilege	1116	rundll32.exe
Token: SeBackupPrivilege	1116	rundll32.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3412 wrote to memory of 1116	3412	rundll32.exe	83
PID 3412 wrote to memory of 1116	3412	rundll32.exe	83
PID 3412 wrote to memory of 1116	3412	rundll32.exe	83
PID 1116 wrote to memory of 2688	1116	rundll32.exe	85
PID 1116 wrote to memory of 2688	1116	rundll32.exe	85
PID 1116 wrote to memory of 2688	1116	rundll32.exe	85
PID 1116 wrote to memory of 2688	1116	rundll32.exe	85
PID 2688 wrote to memory of 2448	2688	B45C.tmp	86
PID 2688 wrote to memory of 2448	2688	B45C.tmp	86
PID 2688 wrote to memory of 2448	2688	B45C.tmp	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\LBB_ReflectiveDll_DllMain.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3412
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\LBB_ReflectiveDll_DllMain.dll,#1
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1116
- - C:\ProgramData\B45C.tmp
    "C:\ProgramData\B45C.tmp"
    3⤵
    - Checks computer location settings
    - Deletes itself
    - Executes dropped EXE
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: RenamesItself
    - Suspicious use of WriteProcessMemory
    PID:2688
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\B45C.tmp >> NUL
      4⤵
      System Location Discovery: System Language Discovery
      PID:2448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\B45C.tmp

Filesize
14KB

MD5
294e9f64cb1642dd89229fff0592856b

SHA1
97b148c27f3da29ba7b18d6aee8a0db9102f47c9

SHA256
917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

SHA512
b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

Download Submit
C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Filesize
113KB

MD5
5d38d7000bfb40635a99070f7577c3e0

SHA1
1fdc8cc16ad2fe127b0634d83da611be384a9636

SHA256
c34c7bbf7675ab2bcf805ca17dbf54b8b67fca613e656c5aa218e879ae02f00c

SHA512
e6248ac2dfb1558869bed8e8e3a129fcdba71e42223b34ce5eeb981ca85d7bb65965939ef5958178aded0cb993dd7945049b814c29b8514057b70df4ae31616c

Download Submit
memory/1116-4-0x0000000002900000-0x0000000002910000-memory.dmp

Filesize
64KB

Download
memory/1116-0-0x00000000020C0000-0x00000000020D0000-memory.dmp

Filesize
64KB

Download
memory/1116-6-0x0000000002900000-0x0000000002910000-memory.dmp

Filesize
64KB

Download
memory/1116-5-0x0000000002900000-0x0000000002910000-memory.dmp

Filesize
64KB

Download
memory/1116-1-0x00000000020C0000-0x00000000020D0000-memory.dmp

Filesize
64KB

Download
memory/1116-2-0x00000000020C0000-0x00000000020D0000-memory.dmp

Filesize
64KB

Download
memory/2688-13-0x0000000000530000-0x0000000000540000-memory.dmp

Filesize
64KB

Download
memory/2688-16-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

Filesize
4KB

Download
memory/2688-15-0x000000007FE20000-0x000000007FE21000-memory.dmp

Filesize
4KB

Download
memory/2688-14-0x0000000000530000-0x0000000000540000-memory.dmp

Filesize
64KB

Download
memory/2688-12-0x000000007FE40000-0x000000007FE41000-memory.dmp

Filesize
4KB

Download
memory/2688-46-0x000000007FE00000-0x000000007FE01000-memory.dmp

Filesize
4KB

Download
memory/2688-45-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

Filesize
4KB

Download