05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326

General

Target

05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe
Size

410KB
MD5

899656822e0bd0f7be4df000e611ef5e
SHA1

df5a38821474abb3c09c9a42845683ddfc9f999f
SHA256

05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326
SHA512

1805d39483e6e27b1b1fec6468f905b4a0e4bfca8f023f5f12a3a768e2259288bd9b76c64c677e8fbaa05145130e4414c1668e3f58d5e4fd967b4da695356175
SSDEEP

6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4p:gtRfJcNYFNm8UhlZGsep

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

Processes:

rundll32.exe

flow	pid	process
13	3564	rundll32.exe
19	3564	rundll32.exe
20	3564	rundll32.exe
21	3564	rundll32.exe
35	3564	rundll32.exe
36	3564	rundll32.exe
39	3564	rundll32.exe
46	3564	rundll32.exe

Deletes itself 1 IoCs

Processes:

zndbf.exe

pid process

3568 zndbf.exe
Executes dropped EXE 1 IoCs

Processes:

zndbf.exe

pid process

3568 zndbf.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3564 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

pid	process
3568	zndbf.exe

pid	process
3568	zndbf.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\zebru\\eldgmzsww.dll\",Verify"	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

Processes:

rundll32.exe

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

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

3564 rundll32.exe
Drops file in Program Files directory 2 IoCs

Processes:

zndbf.exe

description ioc process

File opened for modification \??\c:\Program Files\zebru zndbf.exe
File created \??\c:\Program Files\zebru\eldgmzsww.dll zndbf.exe

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

description	ioc	process
File opened for modification	\??\c:\Program Files\zebru	zndbf.exe
File created	\??\c:\Program Files\zebru\eldgmzsww.dll	zndbf.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

Processes:

zndbf.exerundll32.exe05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.execmd.exePING.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zndbf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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

Processes:

cmd.exePING.EXE

pid process

2132 cmd.exe
4744 PING.EXE

pid	process
2132	cmd.exe
4744	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

Processes:

rundll32.exe

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

Processes:

PING.EXE

pid process

4744 PING.EXE

pid	process
4744	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

rundll32.exe

pid	process
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe
3564	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 3564 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exezndbf.exe

pid process

688 05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe
3568 zndbf.exe

description	pid	process
Token: SeDebugPrivilege	3564	rundll32.exe

pid	process
688	05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe
3568	zndbf.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.execmd.exezndbf.exe

description	pid	process	target process
PID 688 wrote to memory of 2132	688	05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe	cmd.exe
PID 688 wrote to memory of 2132	688	05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe	cmd.exe
PID 688 wrote to memory of 2132	688	05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe	cmd.exe
PID 2132 wrote to memory of 4744	2132	cmd.exe	PING.EXE
PID 2132 wrote to memory of 4744	2132	cmd.exe	PING.EXE
PID 2132 wrote to memory of 4744	2132	cmd.exe	PING.EXE
PID 2132 wrote to memory of 3568	2132	cmd.exe	zndbf.exe
PID 2132 wrote to memory of 3568	2132	cmd.exe	zndbf.exe
PID 2132 wrote to memory of 3568	2132	cmd.exe	zndbf.exe
PID 3568 wrote to memory of 3564	3568	zndbf.exe	rundll32.exe
PID 3568 wrote to memory of 3564	3568	zndbf.exe	rundll32.exe
PID 3568 wrote to memory of 3564	3568	zndbf.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe
"C:\Users\Admin\AppData\Local\Temp\05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:688
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zndbf.exe "C:\Users\Admin\AppData\Local\Temp\05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2132
- - 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:4744
- - C:\Users\Admin\AppData\Local\Temp\zndbf.exe
    C:\Users\Admin\AppData\Local\Temp\\zndbf.exe "C:\Users\Admin\AppData\Local\Temp\05b4b17a240b317825adfa17e1e24134bec93bc6a5f14a9656af03e535c2a326.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3568
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\zebru\eldgmzsww.dll",Verify C:\Users\Admin\AppData\Local\Temp\zndbf.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)
      Suspicious use of NtSetInformationThreadHideFromDebugger
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3564

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:\Users\Admin\AppData\Local\Temp\zndbf.exe

Filesize
410KB

MD5
03da5a569b2a6c37f42416f591e77843

SHA1
f729b0c582e83d67d92a01a998e673f6dd87d4a9

SHA256
83f298053f9debc80fc6a77f4eb8bd1cdd4914f3176cc127d7a8f5f42175e60c

SHA512
95c484ab6da510dc3789902140c3d3b1a49bd0dd16fb0ccc7823bcdff2e65b5b5a9f11b132a20195d20a7960cda4bbfbb8369a9f6d0c2bc8d2e17fae0b352b72

Download Submit
\??\c:\Program Files\zebru\eldgmzsww.dll

Filesize
228KB

MD5
7863b7e35422a8ebdebed34bb5737b4d

SHA1
f65f7cd7a1acba7b62bfeabfb9fdd173ea5191a9

SHA256
b80ec2f66659d39f6ae3f280ce5e9f0a61af0b2d614de0b225dcb7de337beebb

SHA512
73e6d0d219192fc864a793c247e8f7209aed9b8f4edcc68138684e9e75e84984af850f78ee0a632cb00190d727c5e1b857d98ec4c216fb9f9d6a8977f6fc6826

Download Submit
memory/688-0-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/688-2-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/3564-10-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/3564-12-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/3564-13-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/3568-7-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads