1a3cb9c31dad8e377ec1056a9d4f17a0e0cb5250c7dff77996b69453117d0d07

General

Target

497862d7cebcd1443002be373e2b3120N.exe
Size

93KB
MD5

497862d7cebcd1443002be373e2b3120
SHA1

32b76da3655c1125aa68abf818dafbc2ebf0f80b
SHA256

1a3cb9c31dad8e377ec1056a9d4f17a0e0cb5250c7dff77996b69453117d0d07
SHA512

20b54ff7ad2212d831ac8e1748e684b62e62f9afed86649fa587bf3914dcd0de19af54d916a61c8035fa12c5c27688eabab9a0c7bdad49d6bd4c0cf8c6af74c4
SSDEEP

1536:1MIPgEm56wnbkKC2ZyBJU066lwLCRVEB+nR/y8cmNrEIviCOzuajkrDl9HNSj:11PgEOng1d66jRVa+n4NmNNouukrD7HI

Score

8^/10

bootkit discovery persistence spyware stealer upx

Malware Config

Signatures

Blocklisted process makes network request 9 IoCs

flow	pid	Process
3	2836	rundll32.exe
5	2836	rundll32.exe
6	2836	rundll32.exe
7	2836	rundll32.exe
8	2836	rundll32.exe
9	2836	rundll32.exe
10	2836	rundll32.exe
11	2836	rundll32.exe
13	2836	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2764	ikyujdpo.exe

Executes dropped EXE 1 IoCs

pid	Process
2764	ikyujdpo.exe

Loads dropped DLL 3 IoCs

pid	Process
2380	cmd.exe
2380	cmd.exe
2836	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

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2836-15-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral1/files/0x00100000000186a9-14.dat	upx
behavioral1/memory/2836-16-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral1/memory/2836-20-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral1/memory/2836-21-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral1/memory/2836-22-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral1/memory/2836-24-0x0000000010000000-0x0000000010022000-memory.dmp	upx

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-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\wlezw\\fnqee.nef\",crc32"	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)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	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)	\??\t:	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 6 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	497862d7cebcd1443002be373e2b3120N.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	ikyujdpo.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.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
2380	cmd.exe
2760	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

Kills process with taskkill 1 IoCs

evasion

pid	Process
1496	taskkill.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2760	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2836	rundll32.exe
2836	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2836	rundll32.exe
Token: SeDebugPrivilege	1496	taskkill.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2932	497862d7cebcd1443002be373e2b3120N.exe
2764	ikyujdpo.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 2380	2932	497862d7cebcd1443002be373e2b3120N.exe	30
PID 2932 wrote to memory of 2380	2932	497862d7cebcd1443002be373e2b3120N.exe	30
PID 2932 wrote to memory of 2380	2932	497862d7cebcd1443002be373e2b3120N.exe	30
PID 2932 wrote to memory of 2380	2932	497862d7cebcd1443002be373e2b3120N.exe	30
PID 2380 wrote to memory of 2760	2380	cmd.exe	32
PID 2380 wrote to memory of 2760	2380	cmd.exe	32
PID 2380 wrote to memory of 2760	2380	cmd.exe	32
PID 2380 wrote to memory of 2760	2380	cmd.exe	32
PID 2380 wrote to memory of 2764	2380	cmd.exe	33
PID 2380 wrote to memory of 2764	2380	cmd.exe	33
PID 2380 wrote to memory of 2764	2380	cmd.exe	33
PID 2380 wrote to memory of 2764	2380	cmd.exe	33
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2764 wrote to memory of 2836	2764	ikyujdpo.exe	34
PID 2836 wrote to memory of 1496	2836	rundll32.exe	35
PID 2836 wrote to memory of 1496	2836	rundll32.exe	35
PID 2836 wrote to memory of 1496	2836	rundll32.exe	35
PID 2836 wrote to memory of 1496	2836	rundll32.exe	35

C:\Users\Admin\AppData\Local\Temp\497862d7cebcd1443002be373e2b3120N.exe
"C:\Users\Admin\AppData\Local\Temp\497862d7cebcd1443002be373e2b3120N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ikyujdpo.exe "C:\Users\Admin\AppData\Local\Temp\497862d7cebcd1443002be373e2b3120N.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2380
- - 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:2760
- - C:\Users\Admin\AppData\Local\Temp\ikyujdpo.exe
    C:\Users\Admin\AppData\Local\Temp\\ikyujdpo.exe "C:\Users\Admin\AppData\Local\Temp\497862d7cebcd1443002be373e2b3120N.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2764
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\wlezw\fnqee.nef",crc32 C:\Users\Admin\AppData\Local\Temp\ikyujdpo.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
      Suspicious use of WriteProcessMemory
      PID:2836
    - - \??\c:\windows\SysWOW64\taskkill.exe
        
        taskkill /f /im attrib.exe
        5⤵
        System Location Discovery: System Language Discovery
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1496

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

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\ikyujdpo.exe

Filesize
94KB

MD5
9d4a774e7d549a436c1fe6cfe880c98d

SHA1
a4b63204c5e3d26f34c5b5cda651e2613a5ccb55

SHA256
cd14f79b24c15ea7fc1b3bc7fd199930f267e0eb99c2c41ef32d32e801c72d39

SHA512
e0e5bdbb930e555475f34ca5e6e0a7a8ed3c48fceae3d7740024a993e71baaa808db7581d16f9d8380f8ae28c7e6879797d3bdc26f102e69c948594005d1c077

Download Submit
\wlezw\fnqee.nef

Filesize
57KB

MD5
2f53f49e01f09d6e6064871eec1955cd

SHA1
a6e1a6e5c2080d0fb2f7a872e3902a8a4a1a9b5f

SHA256
964e4dd2532d540bb61d3c7ccc833f2358d8cd6b2eabc3a2d51183a18b59f82d

SHA512
2cb98030c3df7417c04f796f78f23f96d381871d9c7ae4a14116764e915b2e2f56b9b3a6fb76fedc50a17788de9538fc7954a7b73bf17e4be43e1fc1a06bc218

Download Submit
memory/2380-8-0x00000000002F0000-0x0000000000318000-memory.dmp

Filesize
160KB

Download
memory/2380-7-0x00000000002F0000-0x0000000000318000-memory.dmp

Filesize
160KB

Download
memory/2764-10-0x00000000002C0000-0x00000000002C1000-memory.dmp

Filesize
4KB

Download
memory/2764-12-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/2836-15-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2836-16-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2836-20-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2836-21-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2836-22-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2836-24-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/2932-1-0x0000000000340000-0x0000000000341000-memory.dmp

Filesize
4KB

Download
memory/2932-3-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/2932-0-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads