82346af1d5ad5c260c4e46f9fac4e3f01430c30b5b454c0b840e80590569ae99

Analysis

max time kernel
20s
max time network
67s
platform
windows10_x64
resource
win10v20201028
submitted
05-04-2021 05:42

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General

Target

updatewin1.exe
Size

272KB
MD5

5b4bd24d6240f467bfbc74803c9f15b0
SHA1

c17f98c182d299845c54069872e8137645768a1a
SHA256

14c7bec7369d4175c6d92554b033862b3847ff98a04dfebdf9f5bb30180ed13e
SHA512

a896acc38a6ff9641b0803f0598369c0d4fa8e38da28c1653c57948fe5e3274880d1b2e7959cd1b1da43375a1318b3ba72e13240bf40b27c852ee72bbb16cadc

Score

10^/10

evasion

Malware Config

Signatures

Deletes Windows Defender Definitions 2 TTPs 1 IoCs

Uses mpcmdrun utility to delete all AV definitions.

evasion

Impair Defenses

T1562

Command-Line Interface

T1059

pid	Process
3180	mpcmdrun.exe

Disables Task Manager via registry modification
evasion
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
504	powershell.exe
504	powershell.exe
504	powershell.exe
504	powershell.exe
904	powershell.exe
904	powershell.exe
904	powershell.exe
2788	powershell.exe
2788	powershell.exe
2788	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	504	powershell.exe
Token: SeDebugPrivilege	904	powershell.exe
Token: SeDebugPrivilege	2788	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 1468	1144	updatewin1.exe	78
PID 1144 wrote to memory of 1468	1144	updatewin1.exe	78
PID 1144 wrote to memory of 1468	1144	updatewin1.exe	78
PID 1468 wrote to memory of 504	1468	updatewin1.exe	81
PID 1468 wrote to memory of 504	1468	updatewin1.exe	81
PID 1468 wrote to memory of 504	1468	updatewin1.exe	81
PID 1468 wrote to memory of 904	1468	updatewin1.exe	83
PID 1468 wrote to memory of 904	1468	updatewin1.exe	83
PID 1468 wrote to memory of 904	1468	updatewin1.exe	83
PID 904 wrote to memory of 2788	904	powershell.exe	85
PID 904 wrote to memory of 2788	904	powershell.exe	85
PID 904 wrote to memory of 2788	904	powershell.exe	85
PID 1468 wrote to memory of 3180	1468	updatewin1.exe	87
PID 1468 wrote to memory of 3180	1468	updatewin1.exe	87
PID 1468 wrote to memory of 4000	1468	updatewin1.exe	89
PID 1468 wrote to memory of 4000	1468	updatewin1.exe	89
PID 1468 wrote to memory of 4000	1468	updatewin1.exe	89

C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
"C:\Users\Admin\AppData\Local\Temp\updatewin1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1144
- C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
  "C:\Users\Admin\AppData\Local\Temp\updatewin1.exe" --Admin
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:504
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:904
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps1
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2788
- - C:\Program Files\Windows Defender\mpcmdrun.exe
    "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
    3⤵
    - Deletes Windows Defender Definitions
    PID:3180
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
    3⤵
    PID:4000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

Impair Defenses

T1562

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/504-15-0x0000000006CB0000-0x0000000006CB1000-memory.dmp

Filesize
4KB

Download
memory/504-19-0x0000000008180000-0x0000000008181000-memory.dmp

Filesize
4KB

Download
memory/504-10-0x00000000072F0000-0x00000000072F1000-memory.dmp

Filesize
4KB

Download
memory/504-11-0x0000000006FF0000-0x0000000006FF1000-memory.dmp

Filesize
4KB

Download
memory/504-12-0x0000000007190000-0x0000000007191000-memory.dmp

Filesize
4KB

Download
memory/504-13-0x0000000007A20000-0x0000000007A21000-memory.dmp

Filesize
4KB

Download
memory/504-14-0x0000000007AC0000-0x0000000007AC1000-memory.dmp

Filesize
4KB

Download
memory/504-37-0x0000000006CB3000-0x0000000006CB4000-memory.dmp

Filesize
4KB

Download
memory/504-16-0x0000000006CB2000-0x0000000006CB3000-memory.dmp

Filesize
4KB

Download
memory/504-17-0x00000000072D0000-0x00000000072D1000-memory.dmp

Filesize
4KB

Download
memory/504-18-0x00000000082F0000-0x00000000082F1000-memory.dmp

Filesize
4KB

Download
memory/504-9-0x0000000001230000-0x0000000001231000-memory.dmp

Filesize
4KB

Download
memory/504-21-0x0000000008F50000-0x0000000008F83000-memory.dmp

Filesize
204KB

Download
memory/504-28-0x0000000008F30000-0x0000000008F31000-memory.dmp

Filesize
4KB

Download
memory/504-29-0x00000000092F0000-0x00000000092F1000-memory.dmp

Filesize
4KB

Download
memory/504-30-0x000000007F160000-0x000000007F161000-memory.dmp

Filesize
4KB

Download
memory/504-31-0x0000000009460000-0x0000000009461000-memory.dmp

Filesize
4KB

Download
memory/504-32-0x0000000009400000-0x0000000009401000-memory.dmp

Filesize
4KB

Download
memory/504-8-0x0000000073410000-0x0000000073AFE000-memory.dmp

Filesize
6.9MB

Download
memory/504-38-0x0000000006CB6000-0x0000000006CB8000-memory.dmp

Filesize
8KB

Download
memory/904-39-0x00000000010D0000-0x00000000010D1000-memory.dmp

Filesize
4KB

Download
memory/904-41-0x00000000010D2000-0x00000000010D3000-memory.dmp

Filesize
4KB

Download
memory/904-52-0x0000000008970000-0x0000000008971000-memory.dmp

Filesize
4KB

Download
memory/904-53-0x0000000009170000-0x0000000009171000-memory.dmp

Filesize
4KB

Download
memory/904-35-0x0000000073410000-0x0000000073AFE000-memory.dmp

Filesize
6.9MB

Download
memory/904-56-0x00000000010D3000-0x00000000010D4000-memory.dmp

Filesize
4KB

Download
memory/1144-5-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1144-2-0x00000000023A0000-0x00000000023A1000-memory.dmp

Filesize
4KB

Download
memory/1468-4-0x0000000002190000-0x0000000002191000-memory.dmp

Filesize
4KB

Download
memory/2788-70-0x0000000006ED0000-0x0000000006ED1000-memory.dmp

Filesize
4KB

Download
memory/2788-64-0x0000000007E20000-0x0000000007E21000-memory.dmp

Filesize
4KB

Download
memory/2788-58-0x0000000072A60000-0x000000007314E000-memory.dmp

Filesize
6.9MB

Download
memory/2788-68-0x0000000008280000-0x0000000008281000-memory.dmp

Filesize
4KB

Download
memory/2788-71-0x0000000006ED2000-0x0000000006ED3000-memory.dmp

Filesize
4KB

Download
memory/2788-82-0x0000000009650000-0x0000000009651000-memory.dmp

Filesize
4KB

Download
memory/2788-84-0x000000007F880000-0x000000007F881000-memory.dmp

Filesize
4KB

Download
memory/2788-85-0x0000000006ED3000-0x0000000006ED4000-memory.dmp

Filesize
4KB

Download
memory/2788-86-0x00000000097C0000-0x00000000097C1000-memory.dmp

Filesize
4KB

Download
memory/2788-88-0x00000000097A0000-0x00000000097A1000-memory.dmp

Filesize
4KB

Download