aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4

Analysis

max time kernel
76s
max time network
81s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
08-11-2022 02:00

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Reason

Machine shutdown

Report Analysis Logs

General

Target

aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe
Size

471KB
MD5

86d1807600b289f064bae30005145b5d
SHA1

265e5ac12e7348a804f72857393a5b13e5843173
SHA256

aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4
SHA512

c740c534a84c90489b6de2178ccdbe06adc957c2d6759e20de10ad7b00b795aefdbd3321e162c6b6cbff8064911101f3b9fe65665256290a1360660b27f65fe2
SSDEEP

12288:zTloC1bARFKPLDt0/Fon3Tst8B6rOSKED:zTJAnWXt0/G3TstG6r9V

Score

9^/10

evasion persistence ransomware

Malware Config

Signatures

Modifies boot configuration data using bcdedit 1 TTPs 10 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1988	bcdedit.exe
2000	bcdedit.exe
1944	bcdedit.exe
1692	bcdedit.exe
1440	bcdedit.exe
1468	bcdedit.exe
1404	bcdedit.exe
1668	bcdedit.exe
1252	bcdedit.exe
2044	bcdedit.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\drivers\6c3c46.sys	kuedu.exe

Executes dropped EXE 1 IoCs

pid	Process
1528	kuedu.exe

Deletes itself 1 IoCs

pid	Process
2040	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe
1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run	kuedu.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\Kuedu = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ywohpa\\kuedu.exe"	kuedu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1044 set thread context of 2040	1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe	48

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe
1528	kuedu.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
464	Process not Found

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1528	kuedu.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 1528	1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe	27
PID 1044 wrote to memory of 1528	1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe	27
PID 1044 wrote to memory of 1528	1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe	27
PID 1044 wrote to memory of 1528	1044	aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe	27
PID 1528 wrote to memory of 1988	1528	kuedu.exe	28
PID 1528 wrote to memory of 1988	1528	kuedu.exe	28
PID 1528 wrote to memory of 1988	1528	kuedu.exe	28
PID 1528 wrote to memory of 1988	1528	kuedu.exe	28
PID 1528 wrote to memory of 2000	1528	kuedu.exe	29
PID 1528 wrote to memory of 2000	1528	kuedu.exe	29
PID 1528 wrote to memory of 2000	1528	kuedu.exe	29
PID 1528 wrote to memory of 2000	1528	kuedu.exe	29
PID 1528 wrote to memory of 1944	1528	kuedu.exe	31
PID 1528 wrote to memory of 1944	1528	kuedu.exe	31
PID 1528 wrote to memory of 1944	1528	kuedu.exe	31
PID 1528 wrote to memory of 1944	1528	kuedu.exe	31
PID 1528 wrote to memory of 1692	1528	kuedu.exe	33
PID 1528 wrote to memory of 1692	1528	kuedu.exe	33
PID 1528 wrote to memory of 1692	1528	kuedu.exe	33
PID 1528 wrote to memory of 1692	1528	kuedu.exe	33
PID 1528 wrote to memory of 1440	1528	kuedu.exe	34
PID 1528 wrote to memory of 1440	1528	kuedu.exe	34
PID 1528 wrote to memory of 1440	1528	kuedu.exe	34
PID 1528 wrote to memory of 1440	1528	kuedu.exe	34
PID 1528 wrote to memory of 1468	1528	kuedu.exe	35
PID 1528 wrote to memory of 1468	1528	kuedu.exe	35
PID 1528 wrote to memory of 1468	1528	kuedu.exe	35
PID 1528 wrote to memory of 1468	1528	kuedu.exe	35
PID 1528 wrote to memory of 1404	1528	kuedu.exe	38
PID 1528 wrote to memory of 1404	1528	kuedu.exe	38
PID 1528 wrote to memory of 1404	1528	kuedu.exe	38
PID 1528 wrote to memory of 1404	1528	kuedu.exe	38
PID 1528 wrote to memory of 1668	1528	kuedu.exe	40
PID 1528 wrote to memory of 1668	1528	kuedu.exe	40
PID 1528 wrote to memory of 1668	1528	kuedu.exe	40
PID 1528 wrote to memory of 1668	1528	kuedu.exe	40
PID 1528 wrote to memory of 1252	1528	kuedu.exe	41
PID 1528 wrote to memory of 1252	1528	kuedu.exe	41
PID 1528 wrote to memory of 1252	1528	kuedu.exe	41
PID 1528 wrote to memory of 1252	1528	kuedu.exe	41
PID 1528 wrote to memory of 2044	1528	kuedu.exe	45
PID 1528 wrote to memory of 2044	1528	kuedu.exe	45
PID 1528 wrote to memory of 2044	1528	kuedu.exe	45
PID 1528 wrote to memory of 2044	1528	kuedu.exe	45
PID 1528 wrote to memory of 1100	1528	kuedu.exe	18
PID 1528 wrote to memory of 1100	1528	kuedu.exe	18
PID 1528 wrote to memory of 1100	1528	kuedu.exe	18
PID 1528 wrote to memory of 1100	1528	kuedu.exe	18
PID 1528 wrote to memory of 1100	1528	kuedu.exe	18
PID 1528 wrote to memory of 1172	1528	kuedu.exe	16
PID 1528 wrote to memory of 1172	1528	kuedu.exe	16
PID 1528 wrote to memory of 1172	1528	kuedu.exe	16
PID 1528 wrote to memory of 1172	1528	kuedu.exe	16
PID 1528 wrote to memory of 1172	1528	kuedu.exe	16
PID 1528 wrote to memory of 1200	1528	kuedu.exe	15
PID 1528 wrote to memory of 1200	1528	kuedu.exe	15
PID 1528 wrote to memory of 1200	1528	kuedu.exe	15
PID 1528 wrote to memory of 1200	1528	kuedu.exe	15
PID 1528 wrote to memory of 1200	1528	kuedu.exe	15
PID 1528 wrote to memory of 1044	1528	kuedu.exe	26
PID 1528 wrote to memory of 1044	1528	kuedu.exe	26
PID 1528 wrote to memory of 1044	1528	kuedu.exe	26
PID 1528 wrote to memory of 1044	1528	kuedu.exe	26
PID 1528 wrote to memory of 1044	1528	kuedu.exe	26

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1200
- C:\Users\Admin\AppData\Local\Temp\aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe
  "C:\Users\Admin\AppData\Local\Temp\aa8b46427e37969fcca8db8667c0c7f63276467a70dc739d1c5391fd2c3bc3a4.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1044
- - C:\Users\Admin\AppData\Local\Temp\Ywohpa\kuedu.exe
    "C:\Users\Admin\AppData\Local\Temp\Ywohpa\kuedu.exe"
    3⤵
    - Drops file in Drivers directory
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1528
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1988
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2000
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1944
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1692
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1440
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1468
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1404
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1668
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1252
  - - C:\Windows\system32\bcdedit.exe
      bcdedit.exe -set TESTSIGNING ON
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2044
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\TGV44EB.bat"
    3⤵
    - Deletes itself
    PID:2040

C:\Windows\system32\Dwm.exe
"C:\Windows\system32\Dwm.exe"
1⤵
PID:1172

C:\Windows\system32\taskhost.exe
"taskhost.exe"
1⤵
PID:1100

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:856

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1524

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact