be652d4e5771a47651e037776bbd47e90d3ab7de28e61e3c86abfc4b76c813dd

Analysis

max time kernel
147s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03/09/2024, 19:16

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General

Target

SilverClient.exe
Size

43KB
MD5

16edc9184a4f2e4c18200304594d43d9
SHA1

9328f1016cf247a13b110d6ece2826ba4ad5a8cf
SHA256

be652d4e5771a47651e037776bbd47e90d3ab7de28e61e3c86abfc4b76c813dd
SHA512

196f4c9b55d2883b4c7364aca90741a9e606952e2c798b2c4075a661768dab274b5b6683280404ff31eed98a11003991c67f7af4d61cf48dd131e7365a3cf74d
SSDEEP

768:UsvI7cIxr7BcD1wjWxYQ4xJNHVR8kq/5h34vCvZPxaxP4RULQv9S6HPz1QB6Si/o:UsvwcIxrgwkbcrq/5xcl4Gsv9j71QoJg

Score

8^/10

evasion execution persistence

Malware Config

Signatures

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2020	attrib.exe
2436	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1124	$77WindowsDefender.exe

Loads dropped DLL 1 IoCs

pid	Process
404	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "\"C:\\Users\\Admin\\Loader\\$77WindowsDefender.exe\""	SilverClient.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1616	powershell.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2584	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2788	schtasks.exe
2132	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2380	SilverClient.exe
2380	SilverClient.exe
2380	SilverClient.exe
1124	$77WindowsDefender.exe
1616	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2324	vssvc.exe
Token: SeRestorePrivilege	2324	vssvc.exe
Token: SeAuditPrivilege	2324	vssvc.exe
Token: SeDebugPrivilege	2380	SilverClient.exe
Token: SeDebugPrivilege	1124	$77WindowsDefender.exe
Token: SeDebugPrivilege	1616	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1124	$77WindowsDefender.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2020	2380	SilverClient.exe	34
PID 2380 wrote to memory of 2020	2380	SilverClient.exe	34
PID 2380 wrote to memory of 2020	2380	SilverClient.exe	34
PID 2380 wrote to memory of 2436	2380	SilverClient.exe	36
PID 2380 wrote to memory of 2436	2380	SilverClient.exe	36
PID 2380 wrote to memory of 2436	2380	SilverClient.exe	36
PID 2380 wrote to memory of 404	2380	SilverClient.exe	38
PID 2380 wrote to memory of 404	2380	SilverClient.exe	38
PID 2380 wrote to memory of 404	2380	SilverClient.exe	38
PID 404 wrote to memory of 2584	404	cmd.exe	40
PID 404 wrote to memory of 2584	404	cmd.exe	40
PID 404 wrote to memory of 2584	404	cmd.exe	40
PID 404 wrote to memory of 1124	404	cmd.exe	41
PID 404 wrote to memory of 1124	404	cmd.exe	41
PID 404 wrote to memory of 1124	404	cmd.exe	41
PID 1124 wrote to memory of 2316	1124	$77WindowsDefender.exe	43
PID 1124 wrote to memory of 2316	1124	$77WindowsDefender.exe	43
PID 1124 wrote to memory of 2316	1124	$77WindowsDefender.exe	43
PID 1124 wrote to memory of 2788	1124	$77WindowsDefender.exe	45
PID 1124 wrote to memory of 2788	1124	$77WindowsDefender.exe	45
PID 1124 wrote to memory of 2788	1124	$77WindowsDefender.exe	45
PID 1124 wrote to memory of 2248	1124	$77WindowsDefender.exe	47
PID 1124 wrote to memory of 2248	1124	$77WindowsDefender.exe	47
PID 1124 wrote to memory of 2248	1124	$77WindowsDefender.exe	47
PID 1124 wrote to memory of 1616	1124	$77WindowsDefender.exe	49
PID 1124 wrote to memory of 1616	1124	$77WindowsDefender.exe	49
PID 1124 wrote to memory of 1616	1124	$77WindowsDefender.exe	49
PID 1124 wrote to memory of 2132	1124	$77WindowsDefender.exe	51
PID 1124 wrote to memory of 2132	1124	$77WindowsDefender.exe	51
PID 1124 wrote to memory of 2132	1124	$77WindowsDefender.exe	51

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2020	attrib.exe
2436	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Loader"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2020
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Loader\$77WindowsDefender.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2436
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp74E2.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:404
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2584
- - C:\Users\Admin\Loader\$77WindowsDefender.exe
    "C:\Users\Admin\Loader\$77WindowsDefender.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1124
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77WindowsDefender.exe
      4⤵
      PID:2316
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77WindowsDefender.exe" /TR "C:\Users\Admin\Loader\$77WindowsDefender.exe \"\$77WindowsDefender.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2788
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77WindowsDefender.exe
      4⤵
      PID:2248
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1616
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "WindowsDefender_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2132

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2324

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp74E2.tmp.bat

Filesize
153B

MD5
75e92470e3074d660dd807ea4e29e881

SHA1
cb8c712f4871945d74e8a80323715a099b660969

SHA256
7b7ddaee7b0977632225081608f634b4682629b03fca8dac50d156b4948616b0

SHA512
fe842b23fdd30453faa29eaef6c0a5391a8eb49bd0c1e442b1cf3da6714bc30e902aa829c6b83f15802669376c75fb3c5bad85d723efe0cdfc21474f694676a9

Download Submit
\Users\Admin\Loader\$77WindowsDefender.exe

Filesize
43KB

MD5
16edc9184a4f2e4c18200304594d43d9

SHA1
9328f1016cf247a13b110d6ece2826ba4ad5a8cf

SHA256
be652d4e5771a47651e037776bbd47e90d3ab7de28e61e3c86abfc4b76c813dd

SHA512
196f4c9b55d2883b4c7364aca90741a9e606952e2c798b2c4075a661768dab274b5b6683280404ff31eed98a11003991c67f7af4d61cf48dd131e7365a3cf74d

Download Submit
memory/1124-19-0x000000013F6F0000-0x000000013F700000-memory.dmp

Filesize
64KB

Download
memory/1616-24-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/1616-25-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2380-0-0x000007FEF50D3000-0x000007FEF50D4000-memory.dmp

Filesize
4KB

Download
memory/2380-1-0x000000013F7A0000-0x000000013F7B0000-memory.dmp

Filesize
64KB

Download
memory/2380-2-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download
memory/2380-3-0x000007FEF50D3000-0x000007FEF50D4000-memory.dmp

Filesize
4KB

Download
memory/2380-4-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download
memory/2380-14-0x000007FEF50D0000-0x000007FEF5ABC000-memory.dmp

Filesize
9.9MB

Download