be652d4e5771a47651e037776bbd47e90d3ab7de28e61e3c86abfc4b76c813dd

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
3532	attrib.exe
4912	attrib.exe

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	SilverClient.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	$77WindowsDefender.exe

Executes dropped EXE 1 IoCs

pid	Process
4936	$77WindowsDefender.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
2032	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
3504	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
1152	schtasks.exe
4500	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
3500	SilverClient.exe
4936	$77WindowsDefender.exe
2032	powershell.exe
2032	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	3052	vssvc.exe
Token: SeRestorePrivilege	3052	vssvc.exe
Token: SeAuditPrivilege	3052	vssvc.exe
Token: SeDebugPrivilege	3500	SilverClient.exe
Token: SeDebugPrivilege	4936	$77WindowsDefender.exe
Token: SeDebugPrivilege	2032	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4936	$77WindowsDefender.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3500 wrote to memory of 4912	3500	SilverClient.exe	94
PID 3500 wrote to memory of 4912	3500	SilverClient.exe	94
PID 3500 wrote to memory of 3532	3500	SilverClient.exe	96
PID 3500 wrote to memory of 3532	3500	SilverClient.exe	96
PID 3500 wrote to memory of 1916	3500	SilverClient.exe	101
PID 3500 wrote to memory of 1916	3500	SilverClient.exe	101
PID 1916 wrote to memory of 3504	1916	cmd.exe	103
PID 1916 wrote to memory of 3504	1916	cmd.exe	103
PID 1916 wrote to memory of 4936	1916	cmd.exe	104
PID 1916 wrote to memory of 4936	1916	cmd.exe	104
PID 4936 wrote to memory of 4368	4936	$77WindowsDefender.exe	107
PID 4936 wrote to memory of 4368	4936	$77WindowsDefender.exe	107
PID 4936 wrote to memory of 1152	4936	$77WindowsDefender.exe	109
PID 4936 wrote to memory of 1152	4936	$77WindowsDefender.exe	109
PID 4936 wrote to memory of 1968	4936	$77WindowsDefender.exe	111
PID 4936 wrote to memory of 1968	4936	$77WindowsDefender.exe	111
PID 4936 wrote to memory of 2032	4936	$77WindowsDefender.exe	113
PID 4936 wrote to memory of 2032	4936	$77WindowsDefender.exe	113
PID 4936 wrote to memory of 4500	4936	$77WindowsDefender.exe	115
PID 4936 wrote to memory of 4500	4936	$77WindowsDefender.exe	115

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
4912	attrib.exe
3532	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3500
- 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:4912
- 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:3532
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF4B6.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3504
- - C:\Users\Admin\Loader\$77WindowsDefender.exe
    "C:\Users\Admin\Loader\$77WindowsDefender.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4936
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77WindowsDefender.exe
      4⤵
      PID:4368
  - - 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:1152
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77WindowsDefender.exe
      4⤵
      PID:1968
  - - 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:2032
  - - 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:4500

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_msvtr5j3.vc3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF4B6.tmp.bat

Filesize
153B

MD5
5d6d91838a62ea8e2cb3fe18394b8505

SHA1
0eac8de615489f071bfc5787103adbdf70988c17

SHA256
1e20a64f47aef81ce2216aaf5c9e3df7ae9923be3c40a4e8ed194aa8d961b5e9

SHA512
c1f2cbd131412dee486bf0e2f2ed164f7b1de55e549518cac0e258265f120a2d39bd110f0fddf3b93bac35adc9dc0df2c0f748f290e138d390ba8756345cac77

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

Filesize
43KB

MD5
16edc9184a4f2e4c18200304594d43d9

SHA1
9328f1016cf247a13b110d6ece2826ba4ad5a8cf

SHA256
be652d4e5771a47651e037776bbd47e90d3ab7de28e61e3c86abfc4b76c813dd

SHA512
196f4c9b55d2883b4c7364aca90741a9e606952e2c798b2c4075a661768dab274b5b6683280404ff31eed98a11003991c67f7af4d61cf48dd131e7365a3cf74d

Download Submit
memory/2032-14-0x000002546E910000-0x000002546E932000-memory.dmp

Filesize
136KB

Download
memory/3500-0-0x00007FFAF6973000-0x00007FFAF6975000-memory.dmp

Filesize
8KB

Download
memory/3500-1-0x0000000000160000-0x0000000000170000-memory.dmp

Filesize
64KB

Download
memory/3500-2-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/3500-3-0x00007FFAF6973000-0x00007FFAF6975000-memory.dmp

Filesize
8KB

Download
memory/3500-4-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/3500-10-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads