b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6

General

Target

b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe
Size

152KB
MD5

d2ae3500c76510d75b6d0c7fc4c11ff9
SHA1

f101a55d55ff777128e4405f8251ab40de90a0a6
SHA256

b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6
SHA512

15da3ba37313526ec6df62ba9dc371e5c75fad55e14f35d3e9c4f922e1738fe56e9eeb6ab603b1eb63a49e9f293c00b84251ea3c3ed7ba154a54dc9dd26c8e9f
SSDEEP

3072:oZpYg19EeiLLmjempGuCYooEK1JWaCItULG3rt2Wcora4dIz:OPjEl6jLiQ1JW+Oy3p/k

Score

7^/10

bootkit persistence spyware stealer

Malware Config

Signatures

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
\??\c:\Program Files\fwvxg\kstudqb.dll	acprotect

Deletes itself 1 IoCs

Processes:

nqtns.exe

pid process

2916 nqtns.exe
Executes dropped EXE 2 IoCs

Processes:

nqtns.exekstudqb.exe

pid process

2916 nqtns.exe
2636 kstudqb.exe
Loads dropped DLL 7 IoCs

Processes:

cmd.exenqtns.exekstudqb.exe

pid process

1500 cmd.exe
1500 cmd.exe
2916 nqtns.exe
2636 kstudqb.exe
2636 kstudqb.exe
2636 kstudqb.exe
2636 kstudqb.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
2916	nqtns.exe

pid	process
2916	nqtns.exe
2636	kstudqb.exe

pid	process
1500	cmd.exe
1500	cmd.exe
2916	nqtns.exe
2636	kstudqb.exe
2636	kstudqb.exe
2636	kstudqb.exe
2636	kstudqb.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

kstudqb.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\Linycpy = "c:\\Program Files\\fwvxg\\kstudqb.exe \"c:\\Program Files\\fwvxg\\kstudqb.dll\",SetHandle"	kstudqb.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

kstudqb.exe

description	ioc	process
File opened (read-only)	\??\k:	kstudqb.exe
File opened (read-only)	\??\m:	kstudqb.exe
File opened (read-only)	\??\t:	kstudqb.exe
File opened (read-only)	\??\x:	kstudqb.exe
File opened (read-only)	\??\e:	kstudqb.exe
File opened (read-only)	\??\n:	kstudqb.exe
File opened (read-only)	\??\q:	kstudqb.exe
File opened (read-only)	\??\r:	kstudqb.exe
File opened (read-only)	\??\s:	kstudqb.exe
File opened (read-only)	\??\v:	kstudqb.exe
File opened (read-only)	\??\y:	kstudqb.exe
File opened (read-only)	\??\a:	kstudqb.exe
File opened (read-only)	\??\b:	kstudqb.exe
File opened (read-only)	\??\g:	kstudqb.exe
File opened (read-only)	\??\o:	kstudqb.exe
File opened (read-only)	\??\p:	kstudqb.exe
File opened (read-only)	\??\z:	kstudqb.exe
File opened (read-only)	\??\h:	kstudqb.exe
File opened (read-only)	\??\i:	kstudqb.exe
File opened (read-only)	\??\j:	kstudqb.exe
File opened (read-only)	\??\l:	kstudqb.exe
File opened (read-only)	\??\u:	kstudqb.exe
File opened (read-only)	\??\w:	kstudqb.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1542.003

Processes:

kstudqb.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 kstudqb.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	kstudqb.exe

Drops file in Program Files directory 4 IoCs

Processes:

nqtns.exe

description	ioc	process
File opened for modification	\??\c:\Program Files\fwvxg	nqtns.exe
File created	\??\c:\Program Files\fwvxg\kstudqb.dll	nqtns.exe
File created	\??\c:\Program Files\fwvxg\kstudqb.exe	nqtns.exe
File opened for modification	\??\c:\Program Files\fwvxg\kstudqb.exe	nqtns.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

kstudqb.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kstudqb.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kstudqb.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1072 PING.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kstudqb.exe

pid process

2636 kstudqb.exe
2636 kstudqb.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

kstudqb.exe

description pid process

Token: SeDebugPrivilege 2636 kstudqb.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exenqtns.exe

pid process

2696 b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe
2916 nqtns.exe

pid	process
1072	PING.EXE

pid	process
2636	kstudqb.exe
2636	kstudqb.exe

description	pid	process
Token: SeDebugPrivilege	2636	kstudqb.exe

pid	process
2696	b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe
2916	nqtns.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.execmd.exenqtns.exe

description	pid	process	target process
PID 2696 wrote to memory of 1500	2696	b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe	cmd.exe
PID 2696 wrote to memory of 1500	2696	b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe	cmd.exe
PID 2696 wrote to memory of 1500	2696	b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe	cmd.exe
PID 2696 wrote to memory of 1500	2696	b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe	cmd.exe
PID 1500 wrote to memory of 1072	1500	cmd.exe	PING.EXE
PID 1500 wrote to memory of 1072	1500	cmd.exe	PING.EXE
PID 1500 wrote to memory of 1072	1500	cmd.exe	PING.EXE
PID 1500 wrote to memory of 1072	1500	cmd.exe	PING.EXE
PID 1500 wrote to memory of 2916	1500	cmd.exe	nqtns.exe
PID 1500 wrote to memory of 2916	1500	cmd.exe	nqtns.exe
PID 1500 wrote to memory of 2916	1500	cmd.exe	nqtns.exe
PID 1500 wrote to memory of 2916	1500	cmd.exe	nqtns.exe
PID 2916 wrote to memory of 2636	2916	nqtns.exe	kstudqb.exe
PID 2916 wrote to memory of 2636	2916	nqtns.exe	kstudqb.exe
PID 2916 wrote to memory of 2636	2916	nqtns.exe	kstudqb.exe
PID 2916 wrote to memory of 2636	2916	nqtns.exe	kstudqb.exe

C:\Users\Admin\AppData\Local\Temp\b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe
"C:\Users\Admin\AppData\Local\Temp\b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\nqtns.exe "C:\Users\Admin\AppData\Local\Temp\b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1500

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:1072

C:\Users\Admin\AppData\Local\Temp\nqtns.exe
C:\Users\Admin\AppData\Local\Temp\\nqtns.exe "C:\Users\Admin\AppData\Local\Temp\b4ac3a06dcd0a654e17c8d7065ed55c72e2bab72ddb12bca646c03b872a9a4c6.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2916

\??\c:\Program Files\fwvxg\kstudqb.exe
"c:\Program Files\fwvxg\kstudqb.exe" "c:\Program Files\fwvxg\kstudqb.dll",SetHandle C:\Users\Admin\AppData\Local\Temp\nqtns.exe
4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2636

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\??\c:\Program Files\fwvxg\kstudqb.dll
Filesize
128KB

MD5
6062093988c9f4b1748b07dd55f20e95

SHA1
a6ae7767928057360e1bd3f21bf1eca730fd5316

SHA256
b19a29efabbfc4b06d6af343e2d59bb79fa14909b3aa1a23376f817c38dc4a76

SHA512
098f7fffbae497fb8eeec1d27d03f3507fae618882ba622c375c9658eabc454f898af67ad8245a5646e749fa54237019f7803f7e6fe8dcafd22f0ebc938424ba

Download Submit
\Program Files\fwvxg\kstudqb.exe
Filesize
43KB

MD5
51138beea3e2c21ec44d0932c71762a8

SHA1
8939cf35447b22dd2c6e6f443446acc1bf986d58

SHA256
5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

SHA512
794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

Download Submit
\Users\Admin\AppData\Local\Temp\nqtns.exe
Filesize
153KB

MD5
fe9fca2c53c916aeb5d2185863d8750c

SHA1
5c19b1a50da62dac057f6fe8ecda8f8f22d9f2dc

SHA256
dad340384c068f1c74ca0b9a7d53ea27cc99f7b6a9dadf38a8d894a391bb93ec

SHA512
208f55e5f0ed4369f7df7c7fa8b3c6ffde2de8ef0e73049d444ec394db1343fd69012e61b4689a89df3de773eaffa50b1f94c6b55a0702312449edfac31102d9

Download Submit
memory/1500-4-0x0000000000120000-0x0000000000150000-memory.dmp

Filesize
192KB

Download
memory/1500-8-0x0000000000120000-0x0000000000150000-memory.dmp

Filesize
192KB

Download
memory/2636-23-0x0000000010000000-0x0000000010048000-memory.dmp

Filesize
288KB

Download
memory/2636-24-0x0000000010000000-0x0000000010048000-memory.dmp

Filesize
288KB

Download
memory/2636-25-0x0000000010000000-0x0000000010048000-memory.dmp

Filesize
288KB

Download
memory/2636-29-0x0000000010000000-0x0000000010048000-memory.dmp

Filesize
288KB

Download
memory/2636-32-0x0000000010000000-0x0000000010048000-memory.dmp

Filesize
288KB

Download
memory/2696-0-0x0000000000400000-0x000000000042F036-memory.dmp

Filesize
188KB

Download
memory/2696-2-0x0000000000400000-0x000000000042F036-memory.dmp

Filesize
188KB

Download
memory/2916-9-0x0000000000400000-0x000000000042F036-memory.dmp

Filesize
188KB

Download
memory/2916-15-0x0000000000400000-0x000000000042F036-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads