34ae59b7acc09c2e82625640cae82c5158b649db1418ddbaa24138b51f1722c5

Analysis

max time kernel
103s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
25/03/2025, 13:38

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General

Target

LockBit-Black-Builder-main/LockBit30/Build/LB3_ReflectiveDll_DllMain.dll
Size

106KB
MD5

2ecc319574b76994e76c4f971c820362
SHA1

8f3d04cab7c6be2220860ec391d75ba2f8f17b33
SHA256

123797c18b044fb5aeba5dcccaf9ef1df0b7553413e9433876f1f94b8cd0584f
SHA512

39c63668d424ff9efa625a82312edf5a30f7ca3edd896bd6ef1857ced02e5462cf191af54b6e55388b844fa5e50f77e3a6ce5b5983f61eb57a45c4b2fbb3567e
SSDEEP

1536:LzICS4A30TY1kUS/U2ztdS1I6DdL9Ta16CX4VtgYfC3zHZbhuMGCS:0J0TYyUS/U2RgGWL9+joVtHfilfd

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-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	AC5D.tmp

Deletes itself 1 IoCs

pid	Process
3508	AC5D.tmp

Executes dropped EXE 1 IoCs

pid	Process
3508	AC5D.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

pid	Process
3508	AC5D.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	AC5D.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 5 IoCs

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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4704	rundll32.exe
4704	rundll32.exe
4704	rundll32.exe
4704	rundll32.exe
4704	rundll32.exe
4704	rundll32.exe
4704	rundll32.exe
4704	rundll32.exe

Suspicious behavior: RenamesItself 26 IoCs

pid	Process
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp
3508	AC5D.tmp

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeAssignPrimaryTokenPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeDebugPrivilege	4704	rundll32.exe
Token: 36	4704	rundll32.exe
Token: SeImpersonatePrivilege	4704	rundll32.exe
Token: SeIncBasePriorityPrivilege	4704	rundll32.exe
Token: SeIncreaseQuotaPrivilege	4704	rundll32.exe
Token: 33	4704	rundll32.exe
Token: SeManageVolumePrivilege	4704	rundll32.exe
Token: SeProfSingleProcessPrivilege	4704	rundll32.exe
Token: SeRestorePrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSystemProfilePrivilege	4704	rundll32.exe
Token: SeTakeOwnershipPrivilege	4704	rundll32.exe
Token: SeShutdownPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeDebugPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeAssignPrimaryTokenPrivilege	4704	rundll32.exe
Token: SeBackupPrivilege	4704	rundll32.exe
Token: SeDebugPrivilege	4704	rundll32.exe
Token: 36	4704	rundll32.exe
Token: SeImpersonatePrivilege	4704	rundll32.exe
Token: SeIncBasePriorityPrivilege	4704	rundll32.exe
Token: SeIncreaseQuotaPrivilege	4704	rundll32.exe
Token: 33	4704	rundll32.exe
Token: SeManageVolumePrivilege	4704	rundll32.exe
Token: SeProfSingleProcessPrivilege	4704	rundll32.exe
Token: SeRestorePrivilege	4704	rundll32.exe
Token: SeSecurityPrivilege	4704	rundll32.exe
Token: SeSystemProfilePrivilege	4704	rundll32.exe
Token: SeTakeOwnershipPrivilege	4704	rundll32.exe
Token: SeShutdownPrivilege	4704	rundll32.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3624 wrote to memory of 4704	3624	rundll32.exe	87
PID 3624 wrote to memory of 4704	3624	rundll32.exe	87
PID 3624 wrote to memory of 4704	3624	rundll32.exe	87
PID 4704 wrote to memory of 3508	4704	rundll32.exe	91
PID 4704 wrote to memory of 3508	4704	rundll32.exe	91
PID 4704 wrote to memory of 3508	4704	rundll32.exe	91
PID 4704 wrote to memory of 3508	4704	rundll32.exe	91
PID 3508 wrote to memory of 2444	3508	AC5D.tmp	93
PID 3508 wrote to memory of 2444	3508	AC5D.tmp	93
PID 3508 wrote to memory of 2444	3508	AC5D.tmp	93

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\LockBit-Black-Builder-main\LockBit30\Build\LB3_ReflectiveDll_DllMain.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3624
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\LockBit-Black-Builder-main\LockBit30\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:4704
- - C:\ProgramData\AC5D.tmp
    "C:\ProgramData\AC5D.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:3508
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\AC5D.tmp >> NUL
      4⤵
      System Location Discovery: System Language Discovery
      PID:2444

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\AC5D.tmp

Filesize
14KB

MD5
294e9f64cb1642dd89229fff0592856b

SHA1
97b148c27f3da29ba7b18d6aee8a0db9102f47c9

SHA256
917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2

SHA512
b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf

Download Submit
C:\Users\Admin\AppData\Local\Temp\LockBit-Black-Builder-main\LockBit30\Build\BBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Filesize
106KB

MD5
e1bc7dad609156e4000bf4de31fbc894

SHA1
8532048676eded8af9820d6cd39b12a1aed3b0c0

SHA256
fe45144aa1de61fcd9bfc2550ec029d29df83b9bd5b0423d4421df3244812b86

SHA512
0260e242acd915416bbff23b19c15d03717471129566764eac0c70405090a9fca980e664d670b567ac52f58ca778be3319e818e30058ba4af96fac78ad27966a

Download Submit
memory/3508-45-0x000000007FE00000-0x000000007FE01000-memory.dmp

Filesize
4KB

Download
memory/3508-11-0x000000007FE40000-0x000000007FE41000-memory.dmp

Filesize
4KB

Download
memory/3508-15-0x000000007FDC0000-0x000000007FDC1000-memory.dmp

Filesize
4KB

Download
memory/3508-44-0x000000007FDE0000-0x000000007FDE1000-memory.dmp

Filesize
4KB

Download
memory/3508-14-0x000000007FE20000-0x000000007FE21000-memory.dmp

Filesize
4KB

Download
memory/3508-13-0x00000000022D0000-0x00000000022E0000-memory.dmp

Filesize
64KB

Download
memory/3508-12-0x00000000022D0000-0x00000000022E0000-memory.dmp

Filesize
64KB

Download
memory/4704-4-0x0000000002D00000-0x0000000002D10000-memory.dmp

Filesize
64KB

Download
memory/4704-5-0x0000000002D00000-0x0000000002D10000-memory.dmp

Filesize
64KB

Download
memory/4704-0-0x00000000024A0000-0x00000000024B0000-memory.dmp

Filesize
64KB

Download
memory/4704-2-0x00000000024A0000-0x00000000024B0000-memory.dmp

Filesize
64KB

Download
memory/4704-1-0x00000000024A0000-0x00000000024B0000-memory.dmp

Filesize
64KB

Download