18af58b9f4df45b56910f88247213dac4032f0d6db71e9a9a40f5051dbd40a53

General

Target
NurHUItan.exe
Size 519KB
Sample260912-l665nseq4z
SHA256 18af58b9f4df45b56910f88247213dac4032f0d6db71e9a9a40f5051dbd40a53
MD5 594e0b284be29ecb1c9097986f818cfe
SHA1 a288328d0035d684fcdbd82b008c3c38950e888e
SHA512 299c2593af69a68b7d73db25d5a3e731859de206bc08851338b9a0e6b2585794c0dbe745bba53bc3d97331faede29b21e8067dbdee025e5b8b032451a173a7ba
SSDEEP 6144:+7xS5uTulZ8uPU5yBrJOOu2u4gbQqprPxC+nQaHPUXLuRSWqy8Gxh16i+onYMgYZ:Em8uPJB1qpDv6iHYspTK5B
TLSH
T175B429147FA98E08D5812A7E455E0A09DBDED1F22532A303370AEF620D45DDEDE2D3DA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution persistence privilege_escalation

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\System32\\userinit.exe,C:\\Windows\\System32\\xdwdDefender.exe"	NurHUItan.exe

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Executes dropped EXE 5 IoCs

pid	Process
2244	xdwdDefender.exe
1748	xdwdDefender.exe
4748	xdwdDefender.exe
5620	xdwdDefender.exe
1944	xdwdDefender.exe

Loads dropped DLL 7 IoCs

pid	Process
2244	xdwdDefender.exe
5780	Process not Found
4948	Process not Found
1748	xdwdDefender.exe
4748	xdwdDefender.exe
5620	xdwdDefender.exe
1944	xdwdDefender.exe

Looks up external IP address via web service 1 TTPs 7 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

discovery

Internet Connection Discovery

T1016.001

flow	ioc
7	api.ipify.org
29	api.ipify.org
51	api.ipify.org
1	api.ipify.org
2	api.ipify.org
3	api.ipify.org
4	api.ipify.org

Drops file in System32 directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\xdwdDefender.exe	xdwdDefender.exe
File created	C:\Windows\System32\xdwdDefender.exe	NurHUItan.exe
File opened for modification	C:\Windows\System32\xdwdDefender.exe	NurHUItan.exe
File opened for modification	C:\Windows\System32\xdwdDefender.exe	xdwdDefender.exe
File opened for modification	C:\Windows\System32\xdwdDefender.exe	xdwdDefender.exe
File opened for modification	C:\Windows\System32\xdwdDefender.exe	xdwdDefender.exe
File opened for modification	C:\Windows\System32\xdwdDefender.exe	xdwdDefender.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Web\xdwdMalwareDef.exe	NurHUItan.exe
File opened for modification	C:\Program Files\Web\xdwdMalwareDef.exe	xdwdDefender.exe
File opened for modification	C:\Program Files\Web\xdwdMalwareDef.exe	xdwdDefender.exe
File opened for modification	C:\Program Files\Web\xdwdMalwareDef.exe	xdwdDefender.exe
File opened for modification	C:\Program Files\Web\xdwdMalwareDef.exe	xdwdDefender.exe
File opened for modification	C:\Program Files\Web\xdwdMalwareDef.exe	xdwdDefender.exe
File created	C:\Program Files\Web\xdwdMalwareDef.exe	NurHUItan.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\xdwd.dll	NurHUItan.exe
File opened for modification	C:\Windows\xdwd.dll	NurHUItan.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4460	cmd.exe
3408	cmd.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	NurHUItan.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2112	schtasks.exe
2992	schtasks.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4984	NurHUItan.exe
Token: SeDebugPrivilege	2244	xdwdDefender.exe
Token: SeDebugPrivilege	1748	xdwdDefender.exe
Token: SeIncBasePriorityPrivilege	2244	xdwdDefender.exe
Token: SeDebugPrivilege	4748	xdwdDefender.exe
Token: SeDebugPrivilege	5620	xdwdDefender.exe
Token: SeDebugPrivilege	1944	xdwdDefender.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 2656	4984	NurHUItan.exe	82
PID 4984 wrote to memory of 4460	4984	NurHUItan.exe	84
PID 4460 wrote to memory of 2992	4460	cmd.exe	86
PID 4984 wrote to memory of 3408	4984	NurHUItan.exe	87
PID 3408 wrote to memory of 2112	3408	cmd.exe	89
PID 4984 wrote to memory of 2244	4984	NurHUItan.exe	90

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\NurHUItan.exe
"C:\Users\Admin\AppData\Local\Temp\NurHUItan.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" netsh advfirewall firewall add rule name="|6+7mQ#Em+Wgm2" dir=in action=allow program="C:\Windows\System32\xdwdDefender.exe" enable=yes & exit
  2⤵
  PID:2656
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\xdwdDefender.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4460
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 1 /tn "Microsoft\Windows\WAppCrashNvTew" /tr "C:\Windows\System32\xdwdDefender.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2992
- C:\Windows\SYSTEM32\cmd.exe
  "cmd" /c schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Program Files\Web\xdwdMalwareDef.exe" /RL HIGHEST & exit
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3408
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc minute /mo 30 /tn "Microsoft\MachineCore" /tr "C:\Program Files\Web\xdwdMalwareDef.exe" /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2112
- C:\Windows\System32\xdwdDefender.exe
  "C:\Windows\System32\xdwdDefender.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  PID:2244

C:\Windows\System32\xdwdDefender.exe
C:\Windows\System32\xdwdDefender.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:1748

C:\Windows\System32\xdwdDefender.exe
C:\Windows\System32\xdwdDefender.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:4748

C:\Windows\System32\xdwdDefender.exe
C:\Windows\System32\xdwdDefender.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:5620

C:\Windows\System32\xdwdDefender.exe
C:\Windows\System32\xdwdDefender.exe
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:1944

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

xdwdDefender.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\xdwdDefender.exe.log
Size 1KB
SHA256 8b410de677f095f88c42c69c716a9383b94ceb86ca90666188fcd4f4df7fc9fa
MD5 5dd6ecdc4507cc0f897cded9ebeb94b4
SHA1 afd42365a5a8fa71f506a3d34960f8ed459cfd86
SHA512 078e5c9b8062420ef2c3a3a816961e957b0daa7f7a2ecd92689d0399febda98a0c727d1cd9b286adce1c132b9efbd383179867cc494831d4679d9e3805d51a06
TLSH
T14011AB722371B1D489163F43295C568827FF4319B550EE0CBAA8B21ED82B41B6F322F3
MD5 SHA1 SHA512 TLSH

Submit Download

xdwdDefender.exe

Path C:\Windows\System32\xdwdDefender.exe
Size 519KB
SHA256 18af58b9f4df45b56910f88247213dac4032f0d6db71e9a9a40f5051dbd40a53
MD5 594e0b284be29ecb1c9097986f818cfe
SHA1 a288328d0035d684fcdbd82b008c3c38950e888e
SHA512 299c2593af69a68b7d73db25d5a3e731859de206bc08851338b9a0e6b2585794c0dbe745bba53bc3d97331faede29b21e8067dbdee025e5b8b032451a173a7ba
SSDEEP 6144:+7xS5uTulZ8uPU5yBrJOOu2u4gbQqprPxC+nQaHPUXLuRSWqy8Gxh16i+onYMgYZ:Em8uPJB1qpDv6iHYspTK5B
TLSH
T175B429147FA98E08D5812A7E455E0A09DBDED1F22532A303370AEF620D45DDEDE2D3DA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

xdwd.dll

Path C:\Windows\xdwd.dll
Size 136KB
SHA256 35c8d022e1d917f1aabdceae98097ccc072161b302f84c768ca63e4b32ac2b66
MD5 16e5a492c9c6ae34c59683be9c51fa31
SHA1 97031b41f5c56f371c28ae0d62a2df7d585adaba
SHA512 20fd369172ef5e3e2fde388666b42e8fe5f0c2bfa338c0345f45e98af6561a249ba3ecc48c3f16efcc73f02ecb67b3ddb1e2e8f0e77d18fa00ac34e6379e50b6
SSDEEP 3072:t0iX+jLyDcqaH9a6DFHo6MjD7VbZaZaZ8Xwlk4MHWZpt:t07yDSvdoRj2up
TLSH
T151D35B0772A500BFE1668638C5630A09E777B8211770DBAF33A4429D9F277E19D3AF61
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4984-0-0x000002C345130000-0x000002C3451B8000-memory.dmp

Download

memory/4984-1-0x000002C361700000-0x000002C361710000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads