d6ac9b5838aad1062ed759ee201e77e07314a0434a9236c6f8b54363e79c541b

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19/11/2024, 14:00

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General

Target

uninst.exe
Size

290KB
MD5

a9b0e998f68a00c1e1645d175f8a3da6
SHA1

6aa996654eec8702f1a5d7d44ed3f0b7968744ec
SHA256

76cf899ca260b581326297a3130a66f01db9eab3e3216eaa6341047aaf16df97
SHA512

43d174efb410c6b5bdd9055e93af42a11f22e658111d69d234fa860b7710de7dce6392125cc51e4c86037a4487c2e4297d7c673bbd9f2b52269bc84c86d8c48e
SSDEEP

6144:ze34W4lHyCn4ik6yiUfFY2SzpYn2/gnqqjGb:UuFkJy2Sz6n2/h

Score

7^/10

bootkit discovery persistence

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1516	Au_.exe

Executes dropped EXE 1 IoCs

pid	Process
1516	Au_.exe

Loads dropped DLL 2 IoCs

pid	Process
1516	Au_.exe
1516	Au_.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	dts.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	dts.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uninst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Au_.exe

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral18/files/0x000a000000023b75-3.dat	nsis_installer_1
behavioral18/files/0x000a000000023b75-3.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
1516	Au_.exe
1516	Au_.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe
1536	dts.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 544 wrote to memory of 1516	544	uninst.exe	84
PID 544 wrote to memory of 1516	544	uninst.exe	84
PID 544 wrote to memory of 1516	544	uninst.exe	84
PID 1516 wrote to memory of 1536	1516	Au_.exe	92
PID 1516 wrote to memory of 1536	1516	Au_.exe	92
PID 1516 wrote to memory of 1536	1516	Au_.exe	92

C:\Users\Admin\AppData\Local\Temp\uninst.exe
"C:\Users\Admin\AppData\Local\Temp\uninst.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:544
- C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe
  "C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe" _?=C:\Users\Admin\AppData\Local\Temp\
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1516
- - C:\Users\Admin\AppData\Local\Temp\dts.exe
    "C:\Users\Admin\AppData\Local\Temp\dts.exe" /uninstallsucc
    3⤵
    - Writes to the Master Boot Record (MBR)
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\lander.ini

Filesize
431B

MD5
9309072b4e6c8858b18a678ea5d2620f

SHA1
573e8c0c513e2ed1facad4f72fa84ce6afdae604

SHA256
3ee2bee76f6684373a2412e26f1c07473757b32c207da6f2f07669c8718171bc

SHA512
74522cedeabacae9e6f9446255be0c7a077e8dbc1ee0bd891bf79184d66e36d7d81f04eb634c8a1b38045e620fd878492f8be95342b5f0d570f4aed027506dfd

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C:\Users\Admin\AppData\Local\Temp\nsaEC07.tmp\FindProcDLL.dll

Filesize
3KB

MD5
8614c450637267afacad1645e23ba24a

SHA1
e7b7b09b5bbc13e910aa36316d9cc5fc5d4dcdc2

SHA256
0fa04f06a6de18d316832086891e9c23ae606d7784d5d5676385839b21ca2758

SHA512
af46cd679097584ff9a1d894a729b6397f4b3af17dff3e6f07bef257bc7e48ffa341d82daf298616cd5df1450fc5ab7435cacb70f27302b6db193f01a9f8391b

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C:\Users\Admin\AppData\Local\Temp\nsaEC07.tmp\inetc.dll

Filesize
20KB

MD5
c498ae64b4971132bba676873978de1e

SHA1
92e4009cd776b6c8616d8bffade7668ef3cb3c27

SHA256
5552bdde7e4113393f683ef501e4cc84dccc071bdc51391ea7fa3e7c1d49e4e8

SHA512
8e5ca35493f749a39ceae6796d2658ba10f7d8d9ceca45bb4365b338fabd1dfa9b9f92e33f50c91b0273e66adfbce4b98b09c15fd2473f8b214ed797462333d7

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C:\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe

Filesize
290KB

MD5
a9b0e998f68a00c1e1645d175f8a3da6

SHA1
6aa996654eec8702f1a5d7d44ed3f0b7968744ec

SHA256
76cf899ca260b581326297a3130a66f01db9eab3e3216eaa6341047aaf16df97

SHA512
43d174efb410c6b5bdd9055e93af42a11f22e658111d69d234fa860b7710de7dce6392125cc51e4c86037a4487c2e4297d7c673bbd9f2b52269bc84c86d8c48e

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memory/1516-10-0x0000000010000000-0x0000000010003000-memory.dmp

Filesize
12KB

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