9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab

Analysis

max time kernel
144s
max time network
144s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16/10/2024, 01:35

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General

Target
9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe
Size 94KB
Sample241016-bz7grawdpc
SHA256 9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab
MD5 235126a6fcdd952ce3adf837e72455b7
SHA1 05553713fd87ae701ccb8d92b1a07257659eb970
SHA512 2e4e3b2482031eec7d345899743541cfca0b5936e7244c10f5352fa8b2b26ae3044a52c916031e666740af972c405adb93f4906368f7e6b4fbc5a0791ec948fe
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlB:eSABNx6vb4RoI4pyjHYLhal01UoPX+h0
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 4 IoCs

flow	pid	Process
5	2580	rundll32.exe
6	2580	rundll32.exe
7	2580	rundll32.exe
8	2580	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x000900000001659b-7.dat	acprotect

Deletes itself 1 IoCs

pid	Process
2428	umqyn.exe

Executes dropped EXE 1 IoCs

pid	Process
2428	umqyn.exe

Loads dropped DLL 4 IoCs

pid	Process
2580	rundll32.exe
2580	rundll32.exe
2580	rundll32.exe
2580	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\tktni\\cewymhr.dll\",DoVirusScan"	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)	\??\e:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\w:	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	9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	umqyn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
1040	cmd.exe
388	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
388	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2580	rundll32.exe
2580	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2580	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2244	9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe
2428	umqyn.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 1040	2244	9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe	28
PID 2244 wrote to memory of 1040	2244	9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe	28
PID 2244 wrote to memory of 1040	2244	9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe	28
PID 2244 wrote to memory of 1040	2244	9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe	28
PID 1040 wrote to memory of 388	1040	cmd.exe	30
PID 1040 wrote to memory of 388	1040	cmd.exe	30
PID 1040 wrote to memory of 388	1040	cmd.exe	30
PID 1040 wrote to memory of 388	1040	cmd.exe	30
PID 1040 wrote to memory of 2428	1040	cmd.exe	31
PID 1040 wrote to memory of 2428	1040	cmd.exe	31
PID 1040 wrote to memory of 2428	1040	cmd.exe	31
PID 1040 wrote to memory of 2428	1040	cmd.exe	31
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32
PID 2428 wrote to memory of 2580	2428	umqyn.exe	32

C:\Users\Admin\AppData\Local\Temp\9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe
"C:\Users\Admin\AppData\Local\Temp\9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\umqyn.exe "C:\Users\Admin\AppData\Local\Temp\9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1040
- - 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:388
- - \??\c:\umqyn.exe
    c:\umqyn.exe "C:\Users\Admin\AppData\Local\Temp\9967333e71cb9d20c01e54504586c51651cf090306eb21dba9c477f209ea61ab.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2428
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\tktni\cewymhr.dll",DoVirusScan c:\umqyn.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:2580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

cewymhr.dll

Path \??\c:\tktni\cewymhr.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
MD5 SHA1 SHA512 SSDEEP

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umqyn.exe

Path \??\c:\umqyn.exe
Size 94KB
SHA256 bf537b8dc07eeb08a8761e5d3cad3ac0fd68ea5cd20e35546194a5b4b76c7dce
MD5 e368bc1abdf9ace70440ca3828cb7105
SHA1 de7e6e97f84b383e118a38c902324b4fa4c0135b
SHA512 35a36ae562eb390b555d7c4cac4d89fc6400aa0ff0332a81f086f2230ef8378065b77234bbbd22a65151cf1cbbaea542b5c5fc9bcb867b603cef62063c95f1cf
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlB:eSABNx6vb4RoI4pyjHYLhal01UoPX+h0
MD5 SHA1 SHA512 SSDEEP

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memory/2244-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2244-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2428-6-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/2580-14-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2580-15-0x000000001002C000-0x000000001002D000-memory.dmp

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memory/2580-13-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2580-11-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2580-16-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2580-17-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2580-18-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/2580-19-0x0000000010000000-0x0000000010032000-memory.dmp

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