05b83fe3c961a52758f8feba4639689fa10dff21ef0a70d8f642e915f484376a

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02/10/2024, 11:38

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General

Target

OFW1_SDK/Demo_VB_CN/lpk.dll
Size

219KB
MD5

f3998164a6f4278d01b3844cfd27244e
SHA1

29bc5a76f2bd7584369c495a1158fc7845d9ef69
SHA256

04d7ebc2f995235ec110323c79ce3385b04e345efc53d02a832ec4505d76fef8
SHA512

ecaf74d9b0c7c6f987565e2418feaee910eecddb5535d30b2000ad4fbb7abda5035f094a746d386f915cb22c51a0e4715bb6d689ba82d16c188f545d58099f83
SSDEEP

6144:oZBEUByHS5FgjVjiNacNU0jc+343MTTSUX:oZBEW5sdKNpc+34GT

Score

7^/10

discovery

Malware Config

Signatures

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral13/files/0x0005000000019450-13.dat	acprotect

Executes dropped EXE 2 IoCs

pid	Process
2572	hrlBE9E.tmp
2688	gkmiuy.exe

Loads dropped DLL 4 IoCs

pid	Process
2392	rundll32.exe
2392	rundll32.exe
2572	hrlBE9E.tmp
2688	gkmiuy.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\gkmiuy.exe	hrlBE9E.tmp
File opened for modification	C:\Windows\SysWOW64\gkmiuy.exe	hrlBE9E.tmp

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2688 set thread context of 2444	2688	gkmiuy.exe	33

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	gkmiuy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	hrlBE9E.tmp

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2572	hrlBE9E.tmp
2688	gkmiuy.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2348 wrote to memory of 2392	2348	rundll32.exe	30
PID 2392 wrote to memory of 2572	2392	rundll32.exe	31
PID 2392 wrote to memory of 2572	2392	rundll32.exe	31
PID 2392 wrote to memory of 2572	2392	rundll32.exe	31
PID 2392 wrote to memory of 2572	2392	rundll32.exe	31
PID 2688 wrote to memory of 2444	2688	gkmiuy.exe	33
PID 2688 wrote to memory of 2444	2688	gkmiuy.exe	33
PID 2688 wrote to memory of 2444	2688	gkmiuy.exe	33
PID 2688 wrote to memory of 2444	2688	gkmiuy.exe	33
PID 2688 wrote to memory of 2444	2688	gkmiuy.exe	33
PID 2688 wrote to memory of 2444	2688	gkmiuy.exe	33

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\OFW1_SDK\Demo_VB_CN\lpk.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\OFW1_SDK\Demo_VB_CN\lpk.dll,#1
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2392
- - C:\Users\Admin\AppData\Local\Temp\hrlBE9E.tmp
    C:\Users\Admin\AppData\Local\Temp\hrlBE9E.tmp
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2572

C:\Windows\SysWOW64\gkmiuy.exe
C:\Windows\SysWOW64\gkmiuy.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  PID:2444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\hrlBE9E.tmp

Filesize
211KB

MD5
75c52c0f1e588f26d0760356a7e967a6

SHA1
47eb0cde06bd86e1323b478d150b734bd69395fe

SHA256
b1d7420ce6aed9e2b65941d7cc405ea5c593b6b2dd4d9dd0d09de55af2b163a3

SHA512
1507da44a313ef66288ecc7fd1c39b9cb0f871d6f0dac812992cc5f8bdec928ebe506169cd487a882c1ef0a57a35fa362a7537c2d585c3eb399ae8cf83c19f66

Download Submit
\Users\Admin\AppData\Local\Temp\utlBECD.tmp

Filesize
172KB

MD5
685f1cbd4af30a1d0c25f252d399a666

SHA1
6a1b978f5e6150b88c8634146f1406ed97d2f134

SHA256
0e478c95a7a07570a69e6061e7c1da9001bccad9cc454f2ed4da58824a13e0f4

SHA512
6555ad6b4f4f26105ca8aad64501d74519a3e091f559b4b563d6ffb20a2ddfcde65e4fe94971a9bc65e86db577f2548ca00f9920d341c8ea808b04c0947d61d9

Download Submit
memory/2392-3-0x00000000001C0000-0x00000000001CE000-memory.dmp

Filesize
56KB

Download
memory/2392-9-0x00000000001C0000-0x00000000001CE000-memory.dmp

Filesize
56KB

Download
memory/2444-28-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2444-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2444-26-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2572-15-0x0000000000410000-0x0000000000483000-memory.dmp

Filesize
460KB

Download
memory/2572-10-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2572-31-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2572-33-0x0000000000410000-0x0000000000483000-memory.dmp

Filesize
460KB

Download
memory/2688-18-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2688-23-0x00000000002E0000-0x0000000000353000-memory.dmp

Filesize
460KB

Download
memory/2688-29-0x00000000002E0000-0x0000000000353000-memory.dmp

Filesize
460KB

Download
memory/2688-30-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download