940179d4c08efa4c19b30d24983371dca5c29bd319692c95c21199634a6b42c9

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-09-2024 02:05

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

uninst.exe
Size

289KB
MD5

0dd00dd208925ab7683f28c1e798c278
SHA1

d7a37709155a25476295811b5174e93e843bcf80
SHA256

b3ce830e15075ed14b24c03502e53debe189a5d7f17b305efac6596385f4f4f4
SHA512

a87fe3a24569616a5381256f35ff4220b4469ae09460e0454e274c4d5806cbb35afbd619bd987d70f6cc5560f7c1d43e954386a75b352deee0c6d0265b78805c
SSDEEP

6144:ne3481SVK3Jy7vou2pg+0ZzcjcNi8isBTyLbwqjG:+og38whSRcgu2GLb

Score

7^/10

bootkit discovery persistence

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
676	Au_.exe

Executes dropped EXE 1 IoCs

pid	Process
676	Au_.exe

Loads dropped DLL 2 IoCs

pid	Process
676	Au_.exe
676	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	sausage.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	uninst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Au_.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sausage.exe

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral18/files/0x0007000000023427-3.dat	nsis_installer_1
behavioral18/files/0x0007000000023427-3.dat	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
676	Au_.exe
676	Au_.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe
628	sausage.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 972 wrote to memory of 676	972	uninst.exe	84
PID 972 wrote to memory of 676	972	uninst.exe	84
PID 972 wrote to memory of 676	972	uninst.exe	84
PID 676 wrote to memory of 628	676	Au_.exe	93
PID 676 wrote to memory of 628	676	Au_.exe	93
PID 676 wrote to memory of 628	676	Au_.exe	93

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:972
- 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:676
- - C:\Users\Admin\AppData\Local\Temp\sausage.exe
    "C:\Users\Admin\AppData\Local\Temp\sausage.exe" /uninstallsucc
    3⤵
    - Writes to the Master Boot Record (MBR)
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:628

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nskA067.tmp\FindProcDLL.dll

Filesize
3KB

MD5
8614c450637267afacad1645e23ba24a

SHA1
e7b7b09b5bbc13e910aa36316d9cc5fc5d4dcdc2

SHA256
0fa04f06a6de18d316832086891e9c23ae606d7784d5d5676385839b21ca2758

SHA512
af46cd679097584ff9a1d894a729b6397f4b3af17dff3e6f07bef257bc7e48ffa341d82daf298616cd5df1450fc5ab7435cacb70f27302b6db193f01a9f8391b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskA067.tmp\inetc.dll

Filesize
20KB

MD5
c498ae64b4971132bba676873978de1e

SHA1
92e4009cd776b6c8616d8bffade7668ef3cb3c27

SHA256
5552bdde7e4113393f683ef501e4cc84dccc071bdc51391ea7fa3e7c1d49e4e8

SHA512
8e5ca35493f749a39ceae6796d2658ba10f7d8d9ceca45bb4365b338fabd1dfa9b9f92e33f50c91b0273e66adfbce4b98b09c15fd2473f8b214ed797462333d7

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

Filesize
289KB

MD5
0dd00dd208925ab7683f28c1e798c278

SHA1
d7a37709155a25476295811b5174e93e843bcf80

SHA256
b3ce830e15075ed14b24c03502e53debe189a5d7f17b305efac6596385f4f4f4

SHA512
a87fe3a24569616a5381256f35ff4220b4469ae09460e0454e274c4d5806cbb35afbd619bd987d70f6cc5560f7c1d43e954386a75b352deee0c6d0265b78805c

Download Submit
C:\Users\Admin\AppData\Roaming\sausage\Lander.ini

Filesize
105B

MD5
4da678da11b74d106b01ac4bb1370ea4

SHA1
baed7767ec83491e0c8de5d983d7ea6b176534f1

SHA256
c73786bb59e69dc42b799ec3161784d6bcddaeb84e63009a4dc655e6b98dd953

SHA512
c569e9b37d56d4544102828d38a59eedfe980cb2a314923382ac3991af07469c23d598f02442d9407145bf95636e774b4eadf30b30cd138bd77d0b68a5bc91fd

Download Submit
memory/676-10-0x0000000010000000-0x0000000010003000-memory.dmp

Filesize
12KB

Download