18b73865ec09decfb91eb7c9fe50c896803cd6a5468fcfb7e282244a89038930

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 01:14

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General

Target
43efdf5e4aee3b411a11c73282aed120_NEAS.exe
Size 154KB
Sample240507-blw4vsef69
SHA256 18b73865ec09decfb91eb7c9fe50c896803cd6a5468fcfb7e282244a89038930
MD5 43efdf5e4aee3b411a11c73282aed120
SHA1 d4a38287ed155b8610945e8212191d887d193ab2
SHA512 0d7b2b8d7b1d055be5c56cb87fefe84ef650a4509f375f589b390589c8857463091cfdba81476d3539ba033c48ab95a1f6700e3bf47fa597fde5b298f2ebae03
SSDEEP 1536:MRiAXaKD5gixq7OstjzjW6ZdjtETzR77i11GAbRp0BGiEA0O0o:6iAXaKD7Ia6KTdNAbzSGiN0OJ
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
24	1016	rundll32.exe
31	1016	rundll32.exe
32	1016	rundll32.exe
33	1016	rundll32.exe
47	1016	rundll32.exe
48	1016	rundll32.exe
59	1016	rundll32.exe
73	1016	rundll32.exe

Deletes itself 1 IoCs

pid	Process
4580	uglks.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	uglks.exe

Loads dropped DLL 1 IoCs

pid	Process
1016	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

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-1-5-21-2860750803-256193626-1801997576-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\mkgho\\deyzn.dll\",GetWindowClass"	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)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	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

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1628	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1016	rundll32.exe
1016	rundll32.exe
1016	rundll32.exe
1016	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1016	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1652	43efdf5e4aee3b411a11c73282aed120_NEAS.exe
4580	uglks.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 1100	1652	43efdf5e4aee3b411a11c73282aed120_NEAS.exe	85
PID 1652 wrote to memory of 1100	1652	43efdf5e4aee3b411a11c73282aed120_NEAS.exe	85
PID 1652 wrote to memory of 1100	1652	43efdf5e4aee3b411a11c73282aed120_NEAS.exe	85
PID 1100 wrote to memory of 1628	1100	cmd.exe	87
PID 1100 wrote to memory of 1628	1100	cmd.exe	87
PID 1100 wrote to memory of 1628	1100	cmd.exe	87
PID 1100 wrote to memory of 4580	1100	cmd.exe	90
PID 1100 wrote to memory of 4580	1100	cmd.exe	90
PID 1100 wrote to memory of 4580	1100	cmd.exe	90
PID 4580 wrote to memory of 1016	4580	uglks.exe	91
PID 4580 wrote to memory of 1016	4580	uglks.exe	91
PID 4580 wrote to memory of 1016	4580	uglks.exe	91

C:\Users\Admin\AppData\Local\Temp\43efdf5e4aee3b411a11c73282aed120_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\43efdf5e4aee3b411a11c73282aed120_NEAS.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\uglks.exe "C:\Users\Admin\AppData\Local\Temp\43efdf5e4aee3b411a11c73282aed120_NEAS.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1100
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:1628
- - \??\c:\uglks.exe
    c:\uglks.exe "C:\Users\Admin\AppData\Local\Temp\43efdf5e4aee3b411a11c73282aed120_NEAS.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4580
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\mkgho\deyzn.dll",GetWindowClass c:\uglks.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)
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1016

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

uglks.exe

Path C:\uglks.exe
Size 154KB
SHA256 70d04ff574b3c8ab79f5a743a3e13687a875018daab92601c0ff44561beba880
MD5 1e17c38b713ed4dc42bac36a8d851138
SHA1 0e360d09776802c5e4713fe252bfc35d8cd2fa22
SHA512 c6f9e4c808869b790dec5c3a209e1ae2037861d9a76c00759ee18b4d6920ffad3fdcd88839da00232097cb090403c2f4b16ffa084a74fc9dc6c1ffd35b0cd37b
SSDEEP 1536:MRiAXaKD5gixq7OstjzjW6ZdjtETzR77i11GAbRp0BGiEA0O0o/:6iAXaKD7Ia6KTdNAbzSGiN0OJ/
MD5 SHA1 SHA512 SSDEEP

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deyzn.dll

Path \??\c:\mkgho\deyzn.dll
Size 63KB
SHA256 032570414587af2303431e8db5d5f4223e0147f4b63a2160b97d9a6ea531bd81
MD5 bec93912524f50c6f7c943716c7ef02b
SHA1 69ba8f1dd5a7d6cd94d688c691406cbd54be4486
SHA512 41fb8970e9007c789227740e81a483bda806470ce25476589a3dfceddaaa60b20d890c37b56f8be83defb2a5b774dbd6c2026fc259884e8acf2971b06041f6a6
SSDEEP 1536:bBgQPJw/1HCl8h1hPkLzPT9d2xQLoChf89uF7DTwVAEV:beq2/1HCa1EzPTfWQMN9uFvMVp
MD5 SHA1 SHA512 SSDEEP

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memory/1016-12-0x00000000010E0000-0x00000000010E2000-memory.dmp

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memory/1016-11-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1016-13-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1016-15-0x00000000010E0000-0x00000000010E2000-memory.dmp

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memory/1016-16-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1016-18-0x0000000010000000-0x0000000010036000-memory.dmp

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memory/1652-0-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/1652-2-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/4580-6-0x0000000000400000-0x0000000000426000-memory.dmp

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memory/4580-8-0x0000000000400000-0x0000000000426000-memory.dmp

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