59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

General

Target

SilverClient.exe
Size

42KB
MD5

e32cc14226ce47c9342ed347c7a47438
SHA1

a8ec8484eebdd76d38988007a21afe56cbeaf951
SHA256

59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa
SHA512

b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63
SSDEEP

768:MiIsJJcPlV1csUxJRBN/l+cJn6590BcmSHrlruPXr7yaaxLEt0URohRULL9S+1fr:MiIsDctUBbn659XTkt0UQGf9Zr1QoE9W

Score

7^/10

execution persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

$77test.exe

pid process

3044 $77test.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2916 cmd.exe

pid	process
3044	$77test.exe

pid	process
2916	cmd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

SilverClient.exe

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2024 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 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

2964 timeout.exe
2748 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

Processes:

schtasks.exeschtasks.exe

pid process

2268 schtasks.exe
1868 schtasks.exe
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

SilverClient.exetaskmgr.exe$77test.exepowershell.exe

pid process

1908 SilverClient.exe
1908 SilverClient.exe
1908 SilverClient.exe
2012 taskmgr.exe
2012 taskmgr.exe
2012 taskmgr.exe
3044 $77test.exe
2024 powershell.exe

pid	process
2024	powershell.exe

pid	process
2964	timeout.exe
2748	timeout.exe

pid	process
2268	schtasks.exe
1868	schtasks.exe

pid	process
1908	SilverClient.exe
1908	SilverClient.exe
1908	SilverClient.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
3044	$77test.exe
2024	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

vssvc.exeSilverClient.exetaskmgr.exe$77test.exepowershell.exe

description	pid	process
Token: SeBackupPrivilege	2760	vssvc.exe
Token: SeRestorePrivilege	2760	vssvc.exe
Token: SeAuditPrivilege	2760	vssvc.exe
Token: SeDebugPrivilege	1908	SilverClient.exe
Token: SeDebugPrivilege	2012	taskmgr.exe
Token: SeDebugPrivilege	3044	$77test.exe
Token: SeDebugPrivilege	2024	powershell.exe

Suspicious use of FindShellTrayWindow 29 IoCs

Processes:

taskmgr.exe

pid	process
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe

Suspicious use of SendNotifyMessage 29 IoCs

Processes:

taskmgr.exe

pid	process
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe
2012	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

$77test.exe

pid process

3044 $77test.exe

pid	process
3044	$77test.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

SilverClient.execmd.exe$77test.execmd.execmd.exe

description	pid	process	target process
PID 1908 wrote to memory of 2916	1908	SilverClient.exe	cmd.exe
PID 1908 wrote to memory of 2916	1908	SilverClient.exe	cmd.exe
PID 1908 wrote to memory of 2916	1908	SilverClient.exe	cmd.exe
PID 2916 wrote to memory of 2964	2916	cmd.exe	timeout.exe
PID 2916 wrote to memory of 2964	2916	cmd.exe	timeout.exe
PID 2916 wrote to memory of 2964	2916	cmd.exe	timeout.exe
PID 2916 wrote to memory of 3044	2916	cmd.exe	$77test.exe
PID 2916 wrote to memory of 3044	2916	cmd.exe	$77test.exe
PID 2916 wrote to memory of 3044	2916	cmd.exe	$77test.exe
PID 3044 wrote to memory of 1680	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1680	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1680	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 2268	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 2268	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 2268	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1536	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1536	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1536	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 2024	3044	$77test.exe	powershell.exe
PID 3044 wrote to memory of 2024	3044	$77test.exe	powershell.exe
PID 3044 wrote to memory of 2024	3044	$77test.exe	powershell.exe
PID 3044 wrote to memory of 1868	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1868	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 1868	3044	$77test.exe	schtasks.exe
PID 3044 wrote to memory of 2756	3044	$77test.exe	cmd.exe
PID 3044 wrote to memory of 2756	3044	$77test.exe	cmd.exe
PID 3044 wrote to memory of 2756	3044	$77test.exe	cmd.exe
PID 3044 wrote to memory of 2648	3044	$77test.exe	cmd.exe
PID 3044 wrote to memory of 2648	3044	$77test.exe	cmd.exe
PID 3044 wrote to memory of 2648	3044	$77test.exe	cmd.exe
PID 2648 wrote to memory of 2748	2648	cmd.exe	timeout.exe
PID 2648 wrote to memory of 2748	2648	cmd.exe	timeout.exe
PID 2648 wrote to memory of 2748	2648	cmd.exe	timeout.exe
PID 2756 wrote to memory of 2776	2756	cmd.exe	schtasks.exe
PID 2756 wrote to memory of 2776	2756	cmd.exe	schtasks.exe
PID 2756 wrote to memory of 2776	2756	cmd.exe	schtasks.exe

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

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:1908
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp196.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2964
- - C:\Users\Admin\test\$77test.exe
    "C:\Users\Admin\test\$77test.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3044
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:1680
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77test.exe" /TR "C:\Users\Admin\test\$77test.exe \"\$77test.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2268
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:1536
  - - 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:2024
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "test_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1868
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "$77test_Task"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2756
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "$77test_Task"
        5⤵
        
        PID:2776
  - - C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpCE96.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2648
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:2748

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2760

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2012

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

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Cab1CC6.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar73AF.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp196.tmp.bat

Filesize
139B

MD5
286d58101458bf4b456387bfa89e4888

SHA1
9231c5f62c82b5dc8a7681bac897056ee93c6194

SHA256
3ccbf6e00680b163141c146961b15a92839a3a19daf821225b8e5f3d376f9cb8

SHA512
17d6fab7905292f9903ffca6ba172184a6212aff5efd51c9b1f14f6deff4062bb1a75e817345b2c20a78cabecc454eefbf79311e0a5e82019c3ff043ca41a668

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCE96.tmp.bat

Filesize
213B

MD5
527ab2b2d797ae34e25df7417a3c7415

SHA1
ce2ddf068e34bb27772925af2416d1b6fac1b05e

SHA256
9a489f85b9e47291c19b5375583d898f886a952ed1ef761aeeb985f20aa1d706

SHA512
75eb4a2fd2fca117040ffe0a86853c2b4e78d77ef53daf7e04b3daaf456481c95f4057f1eb83ec57de6c44bf312418fe7f361e1d7348fa6cbdaff12335e56381

Download Submit
\Users\Admin\test\$77test.exe

Filesize
42KB

MD5
e32cc14226ce47c9342ed347c7a47438

SHA1
a8ec8484eebdd76d38988007a21afe56cbeaf951

SHA256
59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

SHA512
b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63

Download Submit
memory/1908-1-0x000000013FDE0000-0x000000013FDF0000-memory.dmp

Filesize
64KB

Download
memory/1908-2-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

Filesize
9.9MB

Download
memory/1908-0-0x000007FEF64F3000-0x000007FEF64F4000-memory.dmp

Filesize
4KB

Download
memory/1908-5-0x000007FEF64F3000-0x000007FEF64F4000-memory.dmp

Filesize
4KB

Download
memory/1908-6-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

Filesize
9.9MB

Download
memory/1908-16-0x000007FEF64F0000-0x000007FEF6EDC000-memory.dmp

Filesize
9.9MB

Download
memory/2012-4-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2012-3-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2024-27-0x00000000028D0000-0x00000000028D8000-memory.dmp

Filesize
32KB

Download
memory/2024-26-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/3044-44-0x00000000023D0000-0x00000000023DE000-memory.dmp

Filesize
56KB

Download
memory/3044-21-0x000000013FC30000-0x000000013FC40000-memory.dmp

Filesize
64KB

Download
memory/3044-66-0x00000000023E0000-0x0000000002400000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads