b70f127e2ace7d05c03dc33aa51796e1ec6ac74e9268d9d3d41d45209b7624a6

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
24/01/2024, 06:54

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General

Target

uninst.exe
Size

291KB
MD5

d46e308cf36f070e2086f1d4ac104556
SHA1

d1c7473a083d1046e60afe2224f77e9cc98e2738
SHA256

2fe15fc0fec4602b533565d5ed057febdd67c1b526ad564675c6955ade986c6c
SHA512

5daf1b4898c8b20274049fe137454bbe1679bad3b9c9775aa38666a1330c4462e069fd59e33157136a06a718c09fb8c2d5356659d58044c64f73cb79df9ebcb6
SSDEEP

6144:ke344y9m44J3aHC8oQxMnfzn8Sw+GtqjGt:nxJ3GT9e83+Gl

Score

7^/10

bootkit persistence

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2052	Au_.exe

Executes dropped EXE 1 IoCs

pid	Process
2052	Au_.exe

Loads dropped DLL 3 IoCs

pid	Process
2352	uninst.exe
2052	Au_.exe
2052	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

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral17/files/0x000e000000013d89-2.dat	nsis_installer_1
behavioral17/files/0x000e000000013d89-2.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2052	Au_.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe
2740	dts.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2052	Au_.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2352 wrote to memory of 2052	2352	uninst.exe	28
PID 2052 wrote to memory of 2740	2052	Au_.exe	29
PID 2052 wrote to memory of 2740	2052	Au_.exe	29
PID 2052 wrote to memory of 2740	2052	Au_.exe	29
PID 2052 wrote to memory of 2740	2052	Au_.exe	29

C:\Users\Admin\AppData\Local\Temp\uninst.exe
"C:\Users\Admin\AppData\Local\Temp\uninst.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2352
- 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
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of WriteProcessMemory
  PID:2052
- - 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)
    - Suspicious behavior: EnumeratesProcesses
    PID:2740

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nst2D68.tmp\FindProcDLL.dll

Filesize
3KB

MD5
8614c450637267afacad1645e23ba24a

SHA1
e7b7b09b5bbc13e910aa36316d9cc5fc5d4dcdc2

SHA256
0fa04f06a6de18d316832086891e9c23ae606d7784d5d5676385839b21ca2758

SHA512
af46cd679097584ff9a1d894a729b6397f4b3af17dff3e6f07bef257bc7e48ffa341d82daf298616cd5df1450fc5ab7435cacb70f27302b6db193f01a9f8391b

Download Submit
\Users\Admin\AppData\Local\Temp\nst2D68.tmp\inetc.dll

Filesize
20KB

MD5
c498ae64b4971132bba676873978de1e

SHA1
92e4009cd776b6c8616d8bffade7668ef3cb3c27

SHA256
5552bdde7e4113393f683ef501e4cc84dccc071bdc51391ea7fa3e7c1d49e4e8

SHA512
8e5ca35493f749a39ceae6796d2658ba10f7d8d9ceca45bb4365b338fabd1dfa9b9f92e33f50c91b0273e66adfbce4b98b09c15fd2473f8b214ed797462333d7

Download Submit
\Users\Admin\AppData\Local\Temp\~nsu.tmp\Au_.exe

Filesize
291KB

MD5
d46e308cf36f070e2086f1d4ac104556

SHA1
d1c7473a083d1046e60afe2224f77e9cc98e2738

SHA256
2fe15fc0fec4602b533565d5ed057febdd67c1b526ad564675c6955ade986c6c

SHA512
5daf1b4898c8b20274049fe137454bbe1679bad3b9c9775aa38666a1330c4462e069fd59e33157136a06a718c09fb8c2d5356659d58044c64f73cb79df9ebcb6

Download Submit
memory/2052-14-0x0000000010000000-0x0000000010003000-memory.dmp

Filesize
12KB

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