ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061

Analysis

max time kernel
31s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-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
1740	taskkill.exe
520	taskkill.exe
668	taskkill.exe
1164	taskkill.exe
1340	taskkill.exe
1080	taskkill.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe
Token: SeDebugPrivilege	520	taskkill.exe
Token: SeDebugPrivilege	668	taskkill.exe
Token: SeDebugPrivilege	1164	taskkill.exe
Token: SeDebugPrivilege	1340	taskkill.exe
Token: SeDebugPrivilege	1080	taskkill.exe
Token: SeDebugPrivilege	1740	taskkill.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1248 wrote to memory of 944	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	29
PID 1248 wrote to memory of 944	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	29
PID 1248 wrote to memory of 944	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	29
PID 1248 wrote to memory of 944	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	29
PID 944 wrote to memory of 520	944	cmd.exe	30
PID 944 wrote to memory of 520	944	cmd.exe	30
PID 944 wrote to memory of 520	944	cmd.exe	30
PID 944 wrote to memory of 520	944	cmd.exe	30
PID 1248 wrote to memory of 1600	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	32
PID 1248 wrote to memory of 1600	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	32
PID 1248 wrote to memory of 1600	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	32
PID 1248 wrote to memory of 1600	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	32
PID 1600 wrote to memory of 668	1600	cmd.exe	33
PID 1600 wrote to memory of 668	1600	cmd.exe	33
PID 1600 wrote to memory of 668	1600	cmd.exe	33
PID 1600 wrote to memory of 668	1600	cmd.exe	33
PID 1248 wrote to memory of 536	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	34
PID 1248 wrote to memory of 536	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	34
PID 1248 wrote to memory of 536	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	34
PID 1248 wrote to memory of 536	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	34
PID 536 wrote to memory of 1164	536	cmd.exe	35
PID 536 wrote to memory of 1164	536	cmd.exe	35
PID 536 wrote to memory of 1164	536	cmd.exe	35
PID 536 wrote to memory of 1164	536	cmd.exe	35
PID 1248 wrote to memory of 704	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	36
PID 1248 wrote to memory of 704	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	36
PID 1248 wrote to memory of 704	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	36
PID 1248 wrote to memory of 704	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	36
PID 704 wrote to memory of 1340	704	cmd.exe	37
PID 704 wrote to memory of 1340	704	cmd.exe	37
PID 704 wrote to memory of 1340	704	cmd.exe	37
PID 704 wrote to memory of 1340	704	cmd.exe	37
PID 1248 wrote to memory of 544	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	38
PID 1248 wrote to memory of 544	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	38
PID 1248 wrote to memory of 544	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	38
PID 1248 wrote to memory of 544	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	38
PID 544 wrote to memory of 1080	544	cmd.exe	39
PID 544 wrote to memory of 1080	544	cmd.exe	39
PID 544 wrote to memory of 1080	544	cmd.exe	39
PID 544 wrote to memory of 1080	544	cmd.exe	39
PID 1248 wrote to memory of 2028	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	40
PID 1248 wrote to memory of 2028	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	40
PID 1248 wrote to memory of 2028	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	40
PID 1248 wrote to memory of 2028	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	40
PID 2028 wrote to memory of 1740	2028	cmd.exe	41
PID 2028 wrote to memory of 1740	2028	cmd.exe	41
PID 2028 wrote to memory of 1740	2028	cmd.exe	41
PID 2028 wrote to memory of 1740	2028	cmd.exe	41
PID 1248 wrote to memory of 1932	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	42
PID 1248 wrote to memory of 1932	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	42
PID 1248 wrote to memory of 1932	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	42
PID 1248 wrote to memory of 1932	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	42
PID 1932 wrote to memory of 564	1932	cmd.exe	43
PID 1932 wrote to memory of 564	1932	cmd.exe	43
PID 1932 wrote to memory of 564	1932	cmd.exe	43
PID 1932 wrote to memory of 564	1932	cmd.exe	43
PID 1248 wrote to memory of 876	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	44
PID 1248 wrote to memory of 876	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	44
PID 1248 wrote to memory of 876	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	44
PID 1248 wrote to memory of 876	1248	ef9e517a597bb154f045d58dd7dda00e421c69154777b79b89b9659c5b7e8061.exe	44
PID 876 wrote to memory of 1160	876	cmd.exe	45
PID 876 wrote to memory of 1160	876	cmd.exe	45
PID 876 wrote to memory of 1160	876	cmd.exe	45
PID 876 wrote to memory of 1160	876	cmd.exe	45

Views/modifies file attributes 1 TTPs 5 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1160	attrib.exe
1756	attrib.exe
896	attrib.exe
2000	attrib.exe
564	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:1248
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'explorer.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:944
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'explorer.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:520
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'cmd.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'cmd.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:668
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'powershell.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:536
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'powershell.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1164
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'powershell_ise.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:704
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'powershell_ise.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1340
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'studentmain.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'studentmain.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1080
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c taskkill -f -im 'taskmgr.exe'
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2028
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill -f -im 'taskmgr.exe'
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1740
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\bootmgr
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1932
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\bootmgr
    3⤵
    - Views/modifies file attributes
    PID:564
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\boot.ini
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:876
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\boot.ini
    3⤵
    - Views/modifies file attributes
    PID:1160
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\ntldr
  2⤵
  PID:1752
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\ntldr
    3⤵
    - Views/modifies file attributes
    PID:1756
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\Autoexec.bat
  2⤵
  PID:1012
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\Autoexec.bat
    3⤵
    - Views/modifies file attributes
    PID:896
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\Autoexec.bat
  2⤵
  PID:2044
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\windows\win.ini
  2⤵
  PID:1676
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\windows\system.ini
  2⤵
  PID:1540
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c attrib -S -H C:\config.sys
  2⤵
  PID:1608
- - C:\Windows\SysWOW64\attrib.exe
    attrib -S -H C:\config.sys
    3⤵
    - Views/modifies file attributes
    PID:2000
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\config.sys
  2⤵
  PID:1220
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\ntldr
  2⤵
  PID:1516
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\boot.ini
  2⤵
  PID:1028
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\bootmgr
  2⤵
  PID:1096
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c netsh interface set interface '±¾µØÁ¬½Ó' disabled
  2⤵
  PID:1972
- - C:\Windows\SysWOW64\netsh.exe
    netsh interface set interface '±¾µØÁ¬½Ó' disabled
    3⤵
    PID:868
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c netsh interface set interface 'WLAN' disabled
  2⤵
  PID:268
- - C:\Windows\SysWOW64\netsh.exe
    netsh interface set interface 'WLAN' disabled
    3⤵
    PID:1680
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ren C:\*.* *.taierzhuang
  2⤵
  PID:1592
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del -f -s -q C:\*.*
  2⤵
  PID:1156

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/868-85-0x0000000075351000-0x0000000075353000-memory.dmp

Filesize
8KB

Download
memory/1248-73-0x0000000001200000-0x00000000012BD000-memory.dmp

Filesize
756KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads