0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 22:29

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General

Target
0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe
Size 405KB
Sample240602-2ef26shd2t
SHA256 0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72
MD5 2d51404aee2737ebc080844d93130753
SHA1 3b27f564b6934d30c5ca02fe329443fac94b1a0f
SHA512 043e8a598d98f1612a45a41e5e3a02d9b80526ed7a7476b73fec56ea36a0423429a405d2d6f4041a1d7774899757581072b3d705a0216d7f4de8e8aae051ac9e
SSDEEP 6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
12	3152	rundll32.exe
19	3152	rundll32.exe
20	3152	rundll32.exe
21	3152	rundll32.exe
32	3152	rundll32.exe
33	3152	rundll32.exe
38	3152	rundll32.exe
44	3152	rundll32.exe

Deletes itself 1 IoCs

pid	Process
376	mrxxmpv.exe

Executes dropped EXE 1 IoCs

pid	Process
376	mrxxmpv.exe

Loads dropped DLL 1 IoCs

pid	Process
3152	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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\npagg\\bfgkjat.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

description	ioc	Process
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	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)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	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)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3152	rundll32.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\npagg	mrxxmpv.exe
File created	\??\c:\Program Files\npagg\bfgkjat.dll	mrxxmpv.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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3780	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe
3152	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3152	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3236	0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe
376	mrxxmpv.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3236 wrote to memory of 2796	3236	0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe	82
PID 3236 wrote to memory of 2796	3236	0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe	82
PID 3236 wrote to memory of 2796	3236	0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe	82
PID 2796 wrote to memory of 3780	2796	cmd.exe	85
PID 2796 wrote to memory of 3780	2796	cmd.exe	85
PID 2796 wrote to memory of 3780	2796	cmd.exe	85
PID 2796 wrote to memory of 376	2796	cmd.exe	87
PID 2796 wrote to memory of 376	2796	cmd.exe	87
PID 2796 wrote to memory of 376	2796	cmd.exe	87
PID 376 wrote to memory of 3152	376	mrxxmpv.exe	88
PID 376 wrote to memory of 3152	376	mrxxmpv.exe	88
PID 376 wrote to memory of 3152	376	mrxxmpv.exe	88

C:\Users\Admin\AppData\Local\Temp\0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe
"C:\Users\Admin\AppData\Local\Temp\0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3236
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\mrxxmpv.exe "C:\Users\Admin\AppData\Local\Temp\0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:3780
- - C:\Users\Admin\AppData\Local\Temp\mrxxmpv.exe
    C:\Users\Admin\AppData\Local\Temp\\mrxxmpv.exe "C:\Users\Admin\AppData\Local\Temp\0f8e5cb273e1381f0ef3004112b26f70eacc8f59b87b2daf667ad6d689aeaf72.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:376
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\Program Files\npagg\bfgkjat.dll",Verify C:\Users\Admin\AppData\Local\Temp\mrxxmpv.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:3152

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

Replay Monitor

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Downloads

mrxxmpv.exe

Path C:\Users\Admin\AppData\Local\Temp\mrxxmpv.exe
Size 405KB
SHA256 9d43db8982af0b820228be13b0e71e99f2f06d0246d132a3351c142f2d57a3e0
MD5 911d352da9bbc870dac6022747fd9aa2
SHA1 ccd5db7de8ce4ad4bfdfad5f5f07e33a4a191c15
SHA512 a0d616428bcd271936c68dd6cf96a6588d0f6fd43c690d7fd5aaf0261b17e7aa83fa286edf0683d97abe172977f0c02bcd9cc6019d879d89942e71791f767445
SSDEEP 6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4p:gtRfJcNYFNm8UhlZGsep
MD5 SHA1 SHA512 SSDEEP

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bfgkjat.dll

Path \??\c:\Program Files\npagg\bfgkjat.dll
Size 228KB
SHA256 e8060483cb2cf5342539149d5bf808dedb5a1041e398e2a6151de67160dd7d84
MD5 1e809ccb6f86f992101a8cea8985e439
SHA1 8a1f693d41eeaf5a2413075a29a0969a3ebe894c
SHA512 fac123999c8e7a5398b7d9fb6961137e39ce4e04309df18c98ca9ea8e51785c6dce8489952c41aff578a9dd12cf644b9d81389fc4f2ea8cacc0ac4186aa073e8
SSDEEP 6144:U1oEITTl5VCuHFrEy0wEOR7ndfAnVxERZ4CR3XaNC:5vVrHFrL05gdonVANpx
MD5 SHA1 SHA512 SSDEEP

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memory/376-7-0x0000000000400000-0x0000000000464000-memory.dmp

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memory/3152-10-0x0000000010000000-0x0000000010080000-memory.dmp

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memory/3152-11-0x0000000010000000-0x0000000010080000-memory.dmp

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memory/3152-13-0x0000000010000000-0x0000000010080000-memory.dmp

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memory/3236-0-0x0000000000400000-0x0000000000464000-memory.dmp

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memory/3236-2-0x0000000000400000-0x0000000000464000-memory.dmp

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