43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038

General

Target

43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe
Size

86KB
MD5

b70f3a2c277901ebbd8b09c24cd57ff9
SHA1

ecc8df26ffd0cb53ce29ce9bc4d4c10cd2024442
SHA256

43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038
SHA512

ffb444dfba678b42b256d813020a5cc5c8b21801620605f2e5457dde143390a16552b2449baf1d2bad499bf3d9f28e13a2ad672c8f09b6e04227d91f2edac8a6
SSDEEP

1536:qG14P477AxUYrZGoC09k0SkTRHhWqPRN6Cs:qGSQ7sDU/ySkNAqa

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 3 IoCs

flow	pid	Process
17	5080	rundll32.exe
18	5080	rundll32.exe
21	5080	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3304	itwsflnls.exe

Executes dropped EXE 1 IoCs

pid	Process
3304	itwsflnls.exe

Loads dropped DLL 1 IoCs

pid	Process
5080	rundll32.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\kqztbi\\wuxhk.dll\",init"	rundll32.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

description	ioc	Process
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.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

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	itwsflnls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2628	cmd.exe
3112	PING.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3112	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5080	rundll32.exe
5080	rundll32.exe
5080	rundll32.exe
5080	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5080	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3388	43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe
3304	itwsflnls.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3388 wrote to memory of 2628	3388	43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe	86
PID 3388 wrote to memory of 2628	3388	43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe	86
PID 3388 wrote to memory of 2628	3388	43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe	86
PID 2628 wrote to memory of 3112	2628	cmd.exe	88
PID 2628 wrote to memory of 3112	2628	cmd.exe	88
PID 2628 wrote to memory of 3112	2628	cmd.exe	88
PID 2628 wrote to memory of 3304	2628	cmd.exe	91
PID 2628 wrote to memory of 3304	2628	cmd.exe	91
PID 2628 wrote to memory of 3304	2628	cmd.exe	91
PID 3304 wrote to memory of 5080	3304	itwsflnls.exe	92
PID 3304 wrote to memory of 5080	3304	itwsflnls.exe	92
PID 3304 wrote to memory of 5080	3304	itwsflnls.exe	92

C:\Users\Admin\AppData\Local\Temp\43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe
"C:\Users\Admin\AppData\Local\Temp\43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3388
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\itwsflnls.exe "C:\Users\Admin\AppData\Local\Temp\43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2628
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3112
- - \??\c:\itwsflnls.exe
    c:\itwsflnls.exe "C:\Users\Admin\AppData\Local\Temp\43509eb7637b09aa509d42f8f1b1f0302c2bd8520e3c62ca9cb74b70aa4eb038.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3304
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\kqztbi\wuxhk.dll",init c:\itwsflnls.exe
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5080

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\itwsflnls.exe

Filesize
87KB

MD5
cc751596d1ad9f214476e143a8f7fe63

SHA1
a17f4cdd24b5c301758fd851d3bf4da947c1e693

SHA256
57e4d22ca3c3bba38c59ba7f715d85e9d03a2006229de36f607bcb28b8c7c3f2

SHA512
f2a0b8d520e273dbd0098c67a7c1b8ac3797ce2bace387b19dca997503066d8e5cdb0b80ed972b50e0826284fd46ba36896e181345e7d24bb47eed40f7ffa4f0

Download Submit
\??\c:\kqztbi\wuxhk.dll

Filesize
42KB

MD5
36e3fb5964d663272cf1169e1e1ca478

SHA1
58115e08b49505bcbbb5c88a28a86222ba18d5d4

SHA256
c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

SHA512
daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

Download Submit
memory/3304-7-0x00000000004E0000-0x00000000004E1000-memory.dmp

Filesize
4KB

Download
memory/3304-9-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3388-0-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3388-1-0x00000000005F0000-0x00000000005F1000-memory.dmp

Filesize
4KB

Download
memory/3388-3-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/5080-12-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/5080-13-0x0000000001180000-0x0000000001181000-memory.dmp

Filesize
4KB

Download
memory/5080-14-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/5080-15-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/5080-16-0x0000000001180000-0x0000000001181000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads