4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae

General

Target

4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe
Size

404KB
MD5

17e020e9cf81dc12bd3d26c4fd545347
SHA1

4c4d58945290b7f2cb621a6a3c9e823f5a52e72a
SHA256

4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae
SHA512

c203a6d676ef996dd679174101d20b1bfb22fd8bdd486ccde95fd1d608e41cea6d3fb72e6cee952391b9399b24dc0f023a7113a1fbf67298095998ca57fb6075
SSDEEP

6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4s:gtRfJcNYFNm8UhlZGses

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 10 IoCs

Processes:

rundll32.exe

flow	pid	process
3	2796	rundll32.exe
6	2796	rundll32.exe
8	2796	rundll32.exe
9	2796	rundll32.exe
10	2796	rundll32.exe
11	2796	rundll32.exe
12	2796	rundll32.exe
13	2796	rundll32.exe
15	2796	rundll32.exe
16	2796	rundll32.exe

Deletes itself 1 IoCs

Processes:

ldulk.exe

pid process

2116 ldulk.exe
Executes dropped EXE 1 IoCs

Processes:

ldulk.exe

pid process

2116 ldulk.exe
Loads dropped DLL 6 IoCs

Processes:

cmd.exerundll32.exe

pid process

1952 cmd.exe
1952 cmd.exe
2796 rundll32.exe
2796 rundll32.exe
2796 rundll32.exe
2796 rundll32.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
2116	ldulk.exe

pid	process
2116	ldulk.exe

pid	process
1952	cmd.exe
1952	cmd.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.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-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\xapcexjec\\okkai.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)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	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)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	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

Processes:

rundll32.exe

description ioc process

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

Processes:

rundll32.exe

pid process

2796 rundll32.exe

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

Drops file in Program Files directory 2 IoCs

Processes:

ldulk.exe

description	ioc	process
File created	\??\c:\Program Files\xapcexjec\okkai.dll	ldulk.exe
File opened for modification	\??\c:\Program Files\xapcexjec	ldulk.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

1908 PING.EXE

pid	process
1908	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

rundll32.exe

pid	process
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe
2796	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 2796 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exeldulk.exe

pid process

2468 4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe
2116 ldulk.exe

description	pid	process
Token: SeDebugPrivilege	2796	rundll32.exe

pid	process
2468	4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe
2116	ldulk.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.execmd.exeldulk.exe

description	pid	process	target process
PID 2468 wrote to memory of 1952	2468	4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe	cmd.exe
PID 2468 wrote to memory of 1952	2468	4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe	cmd.exe
PID 2468 wrote to memory of 1952	2468	4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe	cmd.exe
PID 2468 wrote to memory of 1952	2468	4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe	cmd.exe
PID 1952 wrote to memory of 1908	1952	cmd.exe	PING.EXE
PID 1952 wrote to memory of 1908	1952	cmd.exe	PING.EXE
PID 1952 wrote to memory of 1908	1952	cmd.exe	PING.EXE
PID 1952 wrote to memory of 1908	1952	cmd.exe	PING.EXE
PID 1952 wrote to memory of 2116	1952	cmd.exe	ldulk.exe
PID 1952 wrote to memory of 2116	1952	cmd.exe	ldulk.exe
PID 1952 wrote to memory of 2116	1952	cmd.exe	ldulk.exe
PID 1952 wrote to memory of 2116	1952	cmd.exe	ldulk.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe
PID 2116 wrote to memory of 2796	2116	ldulk.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe
"C:\Users\Admin\AppData\Local\Temp\4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2468
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ldulk.exe "C:\Users\Admin\AppData\Local\Temp\4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:1908
- - C:\Users\Admin\AppData\Local\Temp\ldulk.exe
    C:\Users\Admin\AppData\Local\Temp\\ldulk.exe "C:\Users\Admin\AppData\Local\Temp\4162c64196d0d349bd8f386c4963adddfba36cf26b5cbc84fce4a64789d938ae.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2116
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\xapcexjec\okkai.dll",Verify C:\Users\Admin\AppData\Local\Temp\ldulk.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
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2796

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

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

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

\??\c:\Program Files\xapcexjec\okkai.dll

Filesize
228KB

MD5
92e4fa059848714cae6e33173100ee55

SHA1
3d275ee1edbfcbbfda8c52954f0135cf12d5f049

SHA256
58f638724dd4401837943c74f7614d88fd1699b08240a1bd8b4a18cabe8fe37a

SHA512
06eb19179741f77cb891797d0245edf7872d6c9b642b450edbf92404f8c7030cc5e30612d5fccf196274b2d0666f36bcdf0617bbe80680fdbc8658b75cf0d452

Download Submit
\Users\Admin\AppData\Local\Temp\ldulk.exe

Filesize
404KB

MD5
712df6f22ea63c965f19f853931ad52e

SHA1
e1dc770e2e92f3300497d2563e81345ac4685614

SHA256
ae67c80121a7a8176d19898280bcf6a3595ae4fdc03d799ffcca305ba44aeaf4

SHA512
b3562b3cbaab949798c8064d2890adc5613f2c70bced09a5036687ee3bf9cf15a28e074a25703225cf49629f5287b65974dc73cad4bb3cfed2a5ca24642d20ee

Download Submit
memory/1952-5-0x00000000022A0000-0x0000000002304000-memory.dmp

Filesize
400KB

Download
memory/2116-8-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2116-10-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2468-0-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2468-2-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2796-17-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2796-18-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2796-15-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2796-19-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2796-21-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads