14c7bec7369d4175c6d92554b033862b3847ff98a04dfebdf9f5bb30180ed13e

Analysis

max time kernel
23s
max time network
101s
platform
windows10_x64
resource
win10v20201028
submitted
15-02-2021 10:18

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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

1160 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

pid	process
1160	mpcmdrun.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exepowershell.exepowershell.exe

pid	process
952	powershell.exe
952	powershell.exe
952	powershell.exe
952	powershell.exe
220	powershell.exe
220	powershell.exe
220	powershell.exe
3172	powershell.exe
3172	powershell.exe
3172	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exepowershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 952 powershell.exe
Token: SeDebugPrivilege 220 powershell.exe
Token: SeDebugPrivilege 3172 powershell.exe

description	pid	process
Token: SeDebugPrivilege	952	powershell.exe
Token: SeDebugPrivilege	220	powershell.exe
Token: SeDebugPrivilege	3172	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

updatewin1.exeupdatewin1.exepowershell.exe

description	pid	process	target process
PID 1276 wrote to memory of 2516	1276	updatewin1.exe	updatewin1.exe
PID 1276 wrote to memory of 2516	1276	updatewin1.exe	updatewin1.exe
PID 1276 wrote to memory of 2516	1276	updatewin1.exe	updatewin1.exe
PID 2516 wrote to memory of 952	2516	updatewin1.exe	powershell.exe
PID 2516 wrote to memory of 952	2516	updatewin1.exe	powershell.exe
PID 2516 wrote to memory of 952	2516	updatewin1.exe	powershell.exe
PID 2516 wrote to memory of 220	2516	updatewin1.exe	powershell.exe
PID 2516 wrote to memory of 220	2516	updatewin1.exe	powershell.exe
PID 2516 wrote to memory of 220	2516	updatewin1.exe	powershell.exe
PID 220 wrote to memory of 3172	220	powershell.exe	powershell.exe
PID 220 wrote to memory of 3172	220	powershell.exe	powershell.exe
PID 220 wrote to memory of 3172	220	powershell.exe	powershell.exe
PID 2516 wrote to memory of 1160	2516	updatewin1.exe	mpcmdrun.exe
PID 2516 wrote to memory of 1160	2516	updatewin1.exe	mpcmdrun.exe
PID 2516 wrote to memory of 1852	2516	updatewin1.exe	cmd.exe
PID 2516 wrote to memory of 1852	2516	updatewin1.exe	cmd.exe
PID 2516 wrote to memory of 1852	2516	updatewin1.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
"C:\Users\Admin\AppData\Local\Temp\updatewin1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1276
- C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
  "C:\Users\Admin\AppData\Local\Temp\updatewin1.exe" --Admin
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2516
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:952
- - 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:220
  - - 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:3172
- - C:\Program Files\Windows Defender\mpcmdrun.exe
    "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
    3⤵
    - Deletes Windows Defender Definitions
    PID:1160
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
    3⤵
    PID:1852

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

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

MD5
377bddd95f14aa0c548ceb315dd7bdcf

SHA1
e4b1cba0fc3d72d289a57f16d8cb4cd9fdb047a2

SHA256
38aa7f7c553d2b89515d0b722578234e612983e23fc2870e6d56282be69e0647

SHA512
d86b103ce9651976df9c314088d127621dd1c9f0201e8de11a58a2619248af609bd05227d28f22d8eb991230fd653cad6a06ce22fcc727f23605fb39c7f3074b

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

MD5
6eee40b6b2e16315a66b7a584cf4c646

SHA1
763746aa97b4434424c9f43d78ee02be4239b53a

SHA256
a68d6a9528f8c49dc67e64b2c976f3a7770bacd9305e35d3511f8e6369292243

SHA512
409aef52f1039c9d48d2e808e223a4e35df47c59961e5e3aeb02772113792e8a3e4fc1b69f49aae5be1fe1dc5c6f9811f9dbeebe0409c2458f1c038fe2a69996

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

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memory/220-34-0x0000000000000000-mapping.dmp

Download
memory/220-66-0x0000000007213000-0x0000000007214000-memory.dmp

Filesize
4KB

Download
memory/220-53-0x0000000009E40000-0x0000000009E41000-memory.dmp

Filesize
4KB

Download
memory/220-52-0x00000000097B0000-0x00000000097B1000-memory.dmp

Filesize
4KB

Download
memory/220-49-0x0000000007212000-0x0000000007213000-memory.dmp

Filesize
4KB

Download
memory/220-47-0x0000000007210000-0x0000000007211000-memory.dmp

Filesize
4KB

Download
memory/220-36-0x0000000073CE0000-0x00000000743CE000-memory.dmp

Filesize
6.9MB

Download
memory/952-15-0x0000000007BA0000-0x0000000007BA1000-memory.dmp

Filesize
4KB

Download
memory/952-8-0x0000000004820000-0x0000000004821000-memory.dmp

Filesize
4KB

Download
memory/952-17-0x00000000082F0000-0x00000000082F1000-memory.dmp

Filesize
4KB

Download
memory/952-18-0x00000000048B2000-0x00000000048B3000-memory.dmp

Filesize
4KB

Download
memory/952-19-0x00000000083C0000-0x00000000083C1000-memory.dmp

Filesize
4KB

Download
memory/952-21-0x00000000090A0000-0x00000000090D3000-memory.dmp

Filesize
204KB

Download
memory/952-28-0x0000000009080000-0x0000000009081000-memory.dmp

Filesize
4KB

Download
memory/952-29-0x00000000093F0000-0x00000000093F1000-memory.dmp

Filesize
4KB

Download
memory/952-30-0x00000000095B0000-0x00000000095B1000-memory.dmp

Filesize
4KB

Download
memory/952-31-0x0000000009550000-0x0000000009551000-memory.dmp

Filesize
4KB

Download
memory/952-33-0x00000000048B3000-0x00000000048B4000-memory.dmp

Filesize
4KB

Download
memory/952-32-0x000000007EE20000-0x000000007EE21000-memory.dmp

Filesize
4KB

Download
memory/952-6-0x0000000000000000-mapping.dmp

Download
memory/952-14-0x0000000007AC0000-0x0000000007AC1000-memory.dmp

Filesize
4KB

Download
memory/952-13-0x0000000007B30000-0x0000000007B31000-memory.dmp

Filesize
4KB

Download
memory/952-12-0x0000000007150000-0x0000000007151000-memory.dmp

Filesize
4KB

Download
memory/952-46-0x00000000048B6000-0x00000000048B8000-memory.dmp

Filesize
8KB

Download
memory/952-11-0x0000000007270000-0x0000000007271000-memory.dmp

Filesize
4KB

Download
memory/952-10-0x00000000048B0000-0x00000000048B1000-memory.dmp

Filesize
4KB

Download
memory/952-16-0x0000000007FF0000-0x0000000007FF1000-memory.dmp

Filesize
4KB

Download
memory/952-7-0x0000000073CE0000-0x00000000743CE000-memory.dmp

Filesize
6.9MB

Download
memory/1160-55-0x0000000000000000-mapping.dmp

Download
memory/1276-5-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1276-2-0x0000000002160000-0x0000000002161000-memory.dmp

Filesize
4KB

Download
memory/1852-57-0x0000000000000000-mapping.dmp

Download
memory/2516-3-0x0000000000000000-mapping.dmp

Download
memory/2516-4-0x00000000020D0000-0x00000000020D1000-memory.dmp

Filesize
4KB

Download
memory/3172-67-0x00000000070C0000-0x00000000070C1000-memory.dmp

Filesize
4KB

Download
memory/3172-64-0x0000000007F10000-0x0000000007F11000-memory.dmp

Filesize
4KB

Download
memory/3172-54-0x0000000000000000-mapping.dmp

Download
memory/3172-68-0x00000000070C2000-0x00000000070C3000-memory.dmp

Filesize
4KB

Download
memory/3172-70-0x0000000008410000-0x0000000008411000-memory.dmp

Filesize
4KB

Download
memory/3172-56-0x00000000733B0000-0x0000000073A9E000-memory.dmp

Filesize
6.9MB

Download
memory/3172-82-0x0000000009890000-0x0000000009891000-memory.dmp

Filesize
4KB

Download
memory/3172-83-0x000000007E730000-0x000000007E731000-memory.dmp

Filesize
4KB

Download
memory/3172-85-0x00000000070C3000-0x00000000070C4000-memory.dmp

Filesize
4KB

Download
memory/3172-86-0x0000000009950000-0x0000000009951000-memory.dmp

Filesize
4KB

Download
memory/3172-88-0x0000000009780000-0x0000000009781000-memory.dmp

Filesize
4KB

Download