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

Processes:

mpcmdrun.exe

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

Processes:

powershell.exepowershell.exepowershell.exe

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

Processes:

powershell.exepowershell.exepowershell.exe

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

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

updatewin1.exeupdatewin1.exepowershell.exe

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

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
974e7c8e3d791be6d6ad79499c6f9cf0

SHA1
203051e3f2306989b0ea155c89d6f508b235d32d

SHA256
dddef2b004d7cfb8d5241b2da39c20db163ba7ba446a03d4663fd28f9f5a3d9c

SHA512
8ee2b03152582adf82f3534c2c552d6827de525cb2c823b81bf0c44a797ebcf4e622ac95fb5d06c69288039035159b2e6162c385ec9b42f976caf4d9ec49b3c4

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

MD5
1ac13f0d6d3fbf8a328ffefb55ffb0fe

SHA1
61d4fe6631b92c0339fa4d073ed01dfccf50564a

SHA256
d5f8316a58820479c33d79efe54eab6d2542676e2592f39afd9893b046d73051

SHA512
4ce584cbe22a0d33de044f85f7da57250a178770ef409eb50834ccb295f723686df39f88c1cb613963124adf45f60bde083b239bdb23652aacf5a653273659cd

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/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/504-6-0x0000000000000000-mapping.dmp

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

Filesize
8KB

Download
memory/904-33-0x0000000000000000-mapping.dmp

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/1468-3-0x0000000000000000-mapping.dmp

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/2788-54-0x0000000000000000-mapping.dmp

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
memory/3180-55-0x0000000000000000-mapping.dmp

Download
memory/4000-57-0x0000000000000000-mapping.dmp

Download