2882cbed0fb11c95d01b487a85338f4ec25fd44fc3f0936d68af4832d1be9a54

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2024 01:10

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General

Target

ransom/Build/LB3_ReflectiveDll_DllMain.dll
Size

98KB
MD5

31d3ab7a5a7a2d7b197c741fe0f374d5
SHA1

7e925b5a2b7283986128d45527fe1ac70d4a606d
SHA256

6efbd82980c404bcc767108da00e4239b9dc779c4a90c9961619dc1ef4bc527e
SHA512

82f186c91beb14ca135b70bc3e43dcbdf0387c862ed3d16f138bb573b244d1cb1a4930d87351dc3a4a36fc36db390b574b4fa7580cf2dd0af09dc1469453b61b
SSDEEP

1536:NzICS4A30TY1kUS/U2ztdS1I6DdL9Ta1HX1P9tWTSyF6ARsg89:eJ0TYyUS/U2RgGWL9+xh9cTSY6AR4

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

Processes:

A400.tmp

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	A400.tmp

Deletes itself 1 IoCs

Processes:

A400.tmp

pid	Process
3124	A400.tmp

Executes dropped EXE 1 IoCs

Processes:

A400.tmp

pid	Process
3124	A400.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 1 IoCs

Processes:

A400.tmp

pid	Process
3124	A400.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

Processes:

rundll32.exeA400.tmpcmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	A400.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 5 IoCs

Processes:

rundll32.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.BNzPckH0e	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.BNzPckH0e\ = "BNzPckH0e"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\BNzPckH0e\DefaultIcon	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\BNzPckH0e	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\BNzPckH0e\DefaultIcon\ = "C:\\ProgramData\\BNzPckH0e.ico"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

rundll32.exe

pid	Process
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe
4780	rundll32.exe

Suspicious behavior: RenamesItself 26 IoCs

Processes:

A400.tmp

pid	Process
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp
3124	A400.tmp

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

rundll32.exe

description	pid	Process
Token: SeAssignPrimaryTokenPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeDebugPrivilege	4780	rundll32.exe
Token: 36	4780	rundll32.exe
Token: SeImpersonatePrivilege	4780	rundll32.exe
Token: SeIncBasePriorityPrivilege	4780	rundll32.exe
Token: SeIncreaseQuotaPrivilege	4780	rundll32.exe
Token: 33	4780	rundll32.exe
Token: SeManageVolumePrivilege	4780	rundll32.exe
Token: SeProfSingleProcessPrivilege	4780	rundll32.exe
Token: SeRestorePrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSystemProfilePrivilege	4780	rundll32.exe
Token: SeTakeOwnershipPrivilege	4780	rundll32.exe
Token: SeShutdownPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeDebugPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeAssignPrimaryTokenPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeDebugPrivilege	4780	rundll32.exe
Token: 36	4780	rundll32.exe
Token: SeImpersonatePrivilege	4780	rundll32.exe
Token: SeIncBasePriorityPrivilege	4780	rundll32.exe
Token: SeIncreaseQuotaPrivilege	4780	rundll32.exe
Token: 33	4780	rundll32.exe
Token: SeManageVolumePrivilege	4780	rundll32.exe
Token: SeProfSingleProcessPrivilege	4780	rundll32.exe
Token: SeRestorePrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSystemProfilePrivilege	4780	rundll32.exe
Token: SeTakeOwnershipPrivilege	4780	rundll32.exe
Token: SeShutdownPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeSecurityPrivilege	4780	rundll32.exe
Token: SeBackupPrivilege	4780	rundll32.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

rundll32.exerundll32.exeA400.tmp

description	pid	Process	procid_target
PID 4320 wrote to memory of 4780	4320	rundll32.exe	83
PID 4320 wrote to memory of 4780	4320	rundll32.exe	83
PID 4320 wrote to memory of 4780	4320	rundll32.exe	83
PID 4780 wrote to memory of 3124	4780	rundll32.exe	85
PID 4780 wrote to memory of 3124	4780	rundll32.exe	85
PID 4780 wrote to memory of 3124	4780	rundll32.exe	85
PID 4780 wrote to memory of 3124	4780	rundll32.exe	85
PID 3124 wrote to memory of 2324	3124	A400.tmp	86
PID 3124 wrote to memory of 2324	3124	A400.tmp	86
PID 3124 wrote to memory of 2324	3124	A400.tmp	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\ransom\Build\LB3_ReflectiveDll_DllMain.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\ransom\Build\LB3_ReflectiveDll_DllMain.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4780
- - C:\ProgramData\A400.tmp
    "C:\ProgramData\A400.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:3124
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\A400.tmp >> NUL
      4⤵
      System Location Discovery: System Language Discovery
      PID:2324

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\A400.tmp

Filesize
14KB

MD5
294e9f64cb1642dd89229fff0592856b

SHA1
97b148c27f3da29ba7b18d6aee8a0db9102f47c9

SHA256
917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

SHA512
b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

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

Filesize
98KB

MD5
3dc467439fce2d2171c6697c0f174523

SHA1
504acf5c140f1da11cf2ddadc131087e0a2d8434

SHA256
b31050da4f8463b0f0f7ac23d0880bf08c37dc9427a8eee22db185b8442cf961

SHA512
ddf5404b3cb9dc7d0ec024bac309e2155a79f167a0603c6ae41bed0fc1e187933b9cc920b2a4bb98d85a387304db7a1b40a65fa523f33e05fec3a983f07d5c9e

Download Submit
memory/3124-10-0x000000007FE40000-0x000000007FE41000-memory.dmp

Filesize
4KB

Download
memory/3124-14-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

Filesize
4KB

Download
memory/3124-13-0x000000007FE20000-0x000000007FE21000-memory.dmp

Filesize
4KB

Download
memory/3124-12-0x0000000002370000-0x0000000002380000-memory.dmp

Filesize
64KB

Download
memory/3124-11-0x0000000002370000-0x0000000002380000-memory.dmp

Filesize
64KB

Download
memory/3124-44-0x000000007FE00000-0x000000007FE01000-memory.dmp

Filesize
4KB

Download
memory/3124-43-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

Filesize
4KB

Download
memory/4780-4-0x0000000002D90000-0x0000000002DA0000-memory.dmp

Filesize
64KB

Download
memory/4780-2-0x0000000002470000-0x0000000002480000-memory.dmp

Filesize
64KB

Download
memory/4780-0-0x0000000002470000-0x0000000002480000-memory.dmp

Filesize
64KB

Download
memory/4780-1-0x0000000002470000-0x0000000002480000-memory.dmp

Filesize
64KB

Download