82346af1d5ad5c260c4e46f9fac4e3f01430c30b5b454c0b840e80590569ae99

Analysis

max time kernel
124s
max time network
126s
platform
windows7_x64
resource
win7v20201028
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

pid	Process
1624	mpcmdrun.exe

Disables Task Manager via registry modification
evasion

Deletes itself 1 IoCs

pid	Process
1584	cmd.exe

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 6 IoCs

pid	Process
1200	powershell.exe
1200	powershell.exe
1200	powershell.exe
1300	powershell.exe
1300	powershell.exe
304	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1200	powershell.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeDebugPrivilege	304	powershell.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1152 wrote to memory of 1064	1152	updatewin1.exe	26
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1200	1064	updatewin1.exe	27
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1064 wrote to memory of 1300	1064	updatewin1.exe	29
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1300 wrote to memory of 304	1300	powershell.exe	34
PID 1064 wrote to memory of 1624	1064	updatewin1.exe	36
PID 1064 wrote to memory of 1624	1064	updatewin1.exe	36
PID 1064 wrote to memory of 1624	1064	updatewin1.exe	36
PID 1064 wrote to memory of 1624	1064	updatewin1.exe	36
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38
PID 1064 wrote to memory of 1584	1064	updatewin1.exe	38

C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
"C:\Users\Admin\AppData\Local\Temp\updatewin1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
  "C:\Users\Admin\AppData\Local\Temp\updatewin1.exe" --Admin
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1064
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1200
- - 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:1300
  - - 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:304
- - C:\Program Files\Windows Defender\mpcmdrun.exe
    "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
    3⤵
    - Deletes Windows Defender Definitions
    PID:1624
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
    3⤵
    - Deletes itself
    PID:1584

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/304-84-0x0000000006460000-0x0000000006461000-memory.dmp

Filesize
4KB

Download
memory/304-72-0x0000000006300000-0x0000000006301000-memory.dmp

Filesize
4KB

Download
memory/304-65-0x0000000004970000-0x0000000004971000-memory.dmp

Filesize
4KB

Download
memory/304-64-0x0000000005420000-0x0000000005421000-memory.dmp

Filesize
4KB

Download
memory/304-66-0x0000000004972000-0x0000000004973000-memory.dmp

Filesize
4KB

Download
memory/304-62-0x0000000002760000-0x0000000002761000-memory.dmp

Filesize
4KB

Download
memory/304-58-0x0000000001040000-0x0000000001041000-memory.dmp

Filesize
4KB

Download
memory/304-69-0x00000000058A0000-0x00000000058A1000-memory.dmp

Filesize
4KB

Download
memory/304-57-0x0000000073AE0000-0x00000000741CE000-memory.dmp

Filesize
6.9MB

Download
memory/304-86-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/304-85-0x0000000006470000-0x0000000006471000-memory.dmp

Filesize
4KB

Download
memory/1064-6-0x0000000001FD0000-0x0000000001FE1000-memory.dmp

Filesize
68KB

Download
memory/1152-9-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1152-2-0x00000000760C1000-0x00000000760C3000-memory.dmp

Filesize
8KB

Download
memory/1152-3-0x0000000001F80000-0x0000000001F91000-memory.dmp

Filesize
68KB

Download
memory/1200-20-0x00000000061C0000-0x00000000061C1000-memory.dmp

Filesize
4KB

Download
memory/1200-33-0x00000000065A0000-0x00000000065A1000-memory.dmp

Filesize
4KB

Download
memory/1200-11-0x0000000073B50000-0x000000007423E000-memory.dmp

Filesize
6.9MB

Download
memory/1200-12-0x0000000000E40000-0x0000000000E41000-memory.dmp

Filesize
4KB

Download
memory/1200-13-0x0000000004B60000-0x0000000004B61000-memory.dmp

Filesize
4KB

Download
memory/1200-14-0x0000000002730000-0x0000000002731000-memory.dmp

Filesize
4KB

Download
memory/1200-15-0x0000000004B20000-0x0000000004B21000-memory.dmp

Filesize
4KB

Download
memory/1200-16-0x0000000004B22000-0x0000000004B23000-memory.dmp

Filesize
4KB

Download
memory/1200-17-0x0000000005450000-0x0000000005451000-memory.dmp

Filesize
4KB

Download
memory/1200-25-0x0000000006200000-0x0000000006201000-memory.dmp

Filesize
4KB

Download
memory/1200-26-0x0000000006280000-0x0000000006281000-memory.dmp

Filesize
4KB

Download
memory/1200-34-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1300-40-0x0000000004B30000-0x0000000004B31000-memory.dmp

Filesize
4KB

Download
memory/1300-38-0x0000000073B20000-0x000000007420E000-memory.dmp

Filesize
6.9MB

Download
memory/1300-39-0x0000000000C00000-0x0000000000C01000-memory.dmp

Filesize
4KB

Download
memory/1300-43-0x0000000004AF0000-0x0000000004AF1000-memory.dmp

Filesize
4KB

Download
memory/1300-52-0x0000000006210000-0x0000000006211000-memory.dmp

Filesize
4KB

Download
memory/1300-41-0x00000000028B0000-0x00000000028B1000-memory.dmp

Filesize
4KB

Download
memory/1300-42-0x00000000054A0000-0x00000000054A1000-memory.dmp

Filesize
4KB

Download
memory/1300-44-0x0000000004AF2000-0x0000000004AF3000-memory.dmp

Filesize
4KB

Download