82346af1d5ad5c260c4e46f9fac4e3f01430c30b5b454c0b840e80590569ae99

Analysis

max time kernel
29s
max time network
65s
platform
windows10_x64
resource
win10v20201028
submitted
05-04-2021 05:39

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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

Processes:

mpcmdrun.exe

pid	Process
204	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

Processes:

powershell.exepowershell.exepowershell.exe

pid	Process
360	powershell.exe
360	powershell.exe
360	powershell.exe
360	powershell.exe
2924	powershell.exe
2924	powershell.exe
2924	powershell.exe
2272	powershell.exe
2272	powershell.exe
2272	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	360	powershell.exe
Token: SeDebugPrivilege	2924	powershell.exe
Token: SeDebugPrivilege	2272	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

updatewin1.exeupdatewin1.exepowershell.exe

description	pid	Process	procid_target
PID 1404 wrote to memory of 476	1404	updatewin1.exe	78
PID 1404 wrote to memory of 476	1404	updatewin1.exe	78
PID 1404 wrote to memory of 476	1404	updatewin1.exe	78
PID 476 wrote to memory of 360	476	updatewin1.exe	81
PID 476 wrote to memory of 360	476	updatewin1.exe	81
PID 476 wrote to memory of 360	476	updatewin1.exe	81
PID 476 wrote to memory of 2924	476	updatewin1.exe	83
PID 476 wrote to memory of 2924	476	updatewin1.exe	83
PID 476 wrote to memory of 2924	476	updatewin1.exe	83
PID 2924 wrote to memory of 2272	2924	powershell.exe	85
PID 2924 wrote to memory of 2272	2924	powershell.exe	85
PID 2924 wrote to memory of 2272	2924	powershell.exe	85
PID 476 wrote to memory of 204	476	updatewin1.exe	87
PID 476 wrote to memory of 204	476	updatewin1.exe	87
PID 476 wrote to memory of 3544	476	updatewin1.exe	89
PID 476 wrote to memory of 3544	476	updatewin1.exe	89
PID 476 wrote to memory of 3544	476	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:1404
- C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
  "C:\Users\Admin\AppData\Local\Temp\updatewin1.exe" --Admin
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:476
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:360
- - 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:2924
  - - 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:2272
- - C:\Program Files\Windows Defender\mpcmdrun.exe
    "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
    3⤵
    - Deletes Windows Defender Definitions
    PID:204
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
    3⤵
    PID:3544

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

MD5
13151583954f0def829054cc3eae25ec

SHA1
2a2b013e8d4201ddc8a80f9680931873702d0213

SHA256
eb542ae9c791940e8e74833eb50543dbbcbc8bf8485698fad82a8b079546c8a7

SHA512
3f7a6d0e5ca29de7b02f5cb993c508ce0c0df12c3d970a3ad6da95149b4cb5cc7a138e7ed6f83e910cb39120f199b3f74fc0ec1a14ca86435a52f247c2514aaf

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5
65641ff1dbf55c1a4d67fe87af1fe3ad

SHA1
ead4b5e7d1ab46ce4ab667cbbd80df622adf3ae0

SHA256
b3c69c0926729b856e4adbcb3a6de3a4ae8b6421d1977cd3f920b5c25ff3a34f

SHA512
b49ddc6ef3bd830552bc12dcf0d08028c149094714ffd84735036363c59c70203c887fd9f96e37a5168347217acf9b8eeb3d0c75a15e526b11dbf0a7c9916ae7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5
472fa1614add2f98ae59b8f9aba0a19a

SHA1
6fdd1488af05ee8b49a80dbc333c6f2b736a5044

SHA256
7173116ad89d18acafdf48217a104c47bde71df8321f2d691fea0d73a06bd2ba

SHA512
906bc09bb881391a775f771d9f1470da0902bd0ba7cda51bf5a19123a0df33fb60c943c19bcc059cd392ac173cdd7fcfe670edc040de2bc5e46659e8b8776015

Download Submit
C:\Users\Admin\AppData\Local\Temp\delself.bat

MD5
9e5ded39abd73456458318c691bbd679

SHA1
0b111626c3687fbd3f647b01fa27d26c88c4583d

SHA256
2c4cad4d2fa2df8c8a61085b6ecc91215486fbb5d8e643eec889fc5709a5813f

SHA512
564c2319b34847b605c1a73db2427ad29d52579cc22cece04c327040b7a9a77591cc6e2dfffa825e70a4534451e70b80e04c01a0b9a3b12c0b96c594bb9c07e4

Download Submit
C:\Users\Admin\AppData\Local\script.ps1

MD5
f972c62f986b5ed49ad7713d93bf6c9f

SHA1
4e157002bdb97e9526ab97bfafbf7c67e1d1efbf

SHA256
b47f85974a7ec2fd5aa82d52f08eb0f6cea7e596a98dd29e8b85b5c37beca0a8

SHA512
2c9e2e1b8b6cb5ffe3edf5dfbc2c3b917cd15ba6a5e5264207a43b02ce7020f44f5088aca195f7b428699f0d6bd693ce557a0227d67bbb4795e350a97314e9c4

Download Submit
memory/204-56-0x0000000000000000-mapping.dmp

Download
memory/360-15-0x0000000007C10000-0x0000000007C11000-memory.dmp

Filesize
4KB

Download
memory/360-38-0x0000000006F36000-0x0000000006F38000-memory.dmp

Filesize
8KB

Download
memory/360-11-0x0000000006F30000-0x0000000006F31000-memory.dmp

Filesize
4KB

Download
memory/360-12-0x0000000006F32000-0x0000000006F33000-memory.dmp

Filesize
4KB

Download
memory/360-13-0x00000000074D0000-0x00000000074D1000-memory.dmp

Filesize
4KB

Download
memory/360-14-0x0000000007C80000-0x0000000007C81000-memory.dmp

Filesize
4KB

Download
memory/360-6-0x0000000000000000-mapping.dmp

Download
memory/360-16-0x0000000007DF0000-0x0000000007DF1000-memory.dmp

Filesize
4KB

Download
memory/360-17-0x0000000008160000-0x0000000008161000-memory.dmp

Filesize
4KB

Download
memory/360-18-0x0000000008780000-0x0000000008781000-memory.dmp

Filesize
4KB

Download
memory/360-19-0x0000000008580000-0x0000000008581000-memory.dmp

Filesize
4KB

Download
memory/360-21-0x0000000009340000-0x0000000009373000-memory.dmp

Filesize
204KB

Download
memory/360-28-0x0000000009320000-0x0000000009321000-memory.dmp

Filesize
4KB

Download
memory/360-29-0x00000000096A0000-0x00000000096A1000-memory.dmp

Filesize
4KB

Download
memory/360-30-0x0000000009840000-0x0000000009841000-memory.dmp

Filesize
4KB

Download
memory/360-31-0x000000007F6A0000-0x000000007F6A1000-memory.dmp

Filesize
4KB

Download
memory/360-32-0x0000000006F33000-0x0000000006F34000-memory.dmp

Filesize
4KB

Download
memory/360-33-0x00000000097E0000-0x00000000097E1000-memory.dmp

Filesize
4KB

Download
memory/360-8-0x0000000073510000-0x0000000073BFE000-memory.dmp

Filesize
6.9MB

Download
memory/360-9-0x0000000006DF0000-0x0000000006DF1000-memory.dmp

Filesize
4KB

Download
memory/360-10-0x0000000007570000-0x0000000007571000-memory.dmp

Filesize
4KB

Download
memory/476-4-0x0000000000000000-mapping.dmp

Download
memory/476-5-0x00000000022F0000-0x00000000022F1000-memory.dmp

Filesize
4KB

Download
memory/1404-2-0x0000000002470000-0x0000000002471000-memory.dmp

Filesize
4KB

Download
memory/1404-3-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/2272-69-0x00000000046F0000-0x00000000046F1000-memory.dmp

Filesize
4KB

Download
memory/2272-70-0x00000000046F2000-0x00000000046F3000-memory.dmp

Filesize
4KB

Download
memory/2272-54-0x0000000000000000-mapping.dmp

Download
memory/2272-88-0x0000000008FF0000-0x0000000008FF1000-memory.dmp

Filesize
4KB

Download
memory/2272-86-0x0000000009010000-0x0000000009011000-memory.dmp

Filesize
4KB

Download
memory/2272-85-0x00000000046F3000-0x00000000046F4000-memory.dmp

Filesize
4KB

Download
memory/2272-84-0x000000007E060000-0x000000007E061000-memory.dmp

Filesize
4KB

Download
memory/2272-59-0x0000000072C90000-0x000000007337E000-memory.dmp

Filesize
6.9MB

Download
memory/2272-65-0x00000000075A0000-0x00000000075A1000-memory.dmp

Filesize
4KB

Download
memory/2272-82-0x0000000008EB0000-0x0000000008EB1000-memory.dmp

Filesize
4KB

Download
memory/2272-68-0x0000000007EA0000-0x0000000007EA1000-memory.dmp

Filesize
4KB

Download
memory/2924-40-0x0000000007432000-0x0000000007433000-memory.dmp

Filesize
4KB

Download
memory/2924-36-0x0000000073510000-0x0000000073BFE000-memory.dmp

Filesize
6.9MB

Download
memory/2924-53-0x000000000A0B0000-0x000000000A0B1000-memory.dmp

Filesize
4KB

Download
memory/2924-41-0x0000000007430000-0x0000000007431000-memory.dmp

Filesize
4KB

Download
memory/2924-34-0x0000000000000000-mapping.dmp

Download
memory/2924-52-0x0000000009830000-0x0000000009831000-memory.dmp

Filesize
4KB

Download
memory/2924-55-0x0000000007433000-0x0000000007434000-memory.dmp

Filesize
4KB

Download
memory/3544-57-0x0000000000000000-mapping.dmp

Download