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

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	$77test.exe

Executes dropped EXE 1 IoCs

pid	Process
4288	$77test.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\\test\\$77test.exe\""	SilverClient.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
5076	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

pid	Process
1564	timeout.exe
936	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
5104	schtasks.exe
3732	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
3344	SilverClient.exe
4288	$77test.exe
4288	$77test.exe
5076	powershell.exe
5076	powershell.exe
5076	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	3788	vssvc.exe
Token: SeRestorePrivilege	3788	vssvc.exe
Token: SeAuditPrivilege	3788	vssvc.exe
Token: SeDebugPrivilege	3344	SilverClient.exe
Token: SeDebugPrivilege	4288	$77test.exe
Token: SeDebugPrivilege	5076	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4288	$77test.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3344 wrote to memory of 4392	3344	SilverClient.exe	105
PID 3344 wrote to memory of 4392	3344	SilverClient.exe	105
PID 4392 wrote to memory of 1564	4392	cmd.exe	107
PID 4392 wrote to memory of 1564	4392	cmd.exe	107
PID 4392 wrote to memory of 4288	4392	cmd.exe	108
PID 4392 wrote to memory of 4288	4392	cmd.exe	108
PID 4288 wrote to memory of 2248	4288	$77test.exe	111
PID 4288 wrote to memory of 2248	4288	$77test.exe	111
PID 4288 wrote to memory of 5104	4288	$77test.exe	113
PID 4288 wrote to memory of 5104	4288	$77test.exe	113
PID 4288 wrote to memory of 3616	4288	$77test.exe	115
PID 4288 wrote to memory of 3616	4288	$77test.exe	115
PID 4288 wrote to memory of 5076	4288	$77test.exe	117
PID 4288 wrote to memory of 5076	4288	$77test.exe	117
PID 4288 wrote to memory of 3732	4288	$77test.exe	118
PID 4288 wrote to memory of 3732	4288	$77test.exe	118
PID 4288 wrote to memory of 2420	4288	$77test.exe	123
PID 4288 wrote to memory of 2420	4288	$77test.exe	123
PID 4288 wrote to memory of 660	4288	$77test.exe	125
PID 4288 wrote to memory of 660	4288	$77test.exe	125
PID 4288 wrote to memory of 2924	4288	$77test.exe	127
PID 4288 wrote to memory of 2924	4288	$77test.exe	127
PID 2924 wrote to memory of 936	2924	cmd.exe	129
PID 2924 wrote to memory of 936	2924	cmd.exe	129
PID 660 wrote to memory of 428	660	cmd.exe	130
PID 660 wrote to memory of 428	660	cmd.exe	130

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:3344
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp863.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4392
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1564
- - C:\Users\Admin\test\$77test.exe
    "C:\Users\Admin\test\$77test.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:4288
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:2248
  - - 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:5104
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:3616
  - - 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:5076
  - - 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:3732
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77test.exe
      4⤵
      PID:2420
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /delete /f /tn "$77test_Task"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:660
    - - C:\Windows\system32\schtasks.exe
        
        schtasks /delete /f /tn "$77test_Task"
        5⤵
        
        PID:428
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC7C2.tmp.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2924
    - - C:\Windows\system32\timeout.exe
        
        timeout 3
        5⤵
        Delays execution with timeout.exe
        
        PID:936

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3788

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4120,i,1729213506309163284,12809566808978835441,262144 --variations-seed-version --mojo-platform-channel-handle=4036 /prefetch:8
1⤵
PID:3964

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4048,i,1729213506309163284,12809566808978835441,262144 --variations-seed-version --mojo-platform-channel-handle=1420 /prefetch:8
1⤵
PID:4904

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

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_5its14hp.jrh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp863.tmp.bat

Filesize
139B

MD5
9cf77823ae2e50e1a1c8733e3121a75d

SHA1
c7ebfead12bbb09a47367b788fd266706c170829

SHA256
152c16b78b689512de9c97e71fee474ccc77f6aea73716257dd9ef93d9bf8355

SHA512
d428063a6c256144789d096f9ce45037a0649bbea804751a6473635e2ac4e99a23a32a4b7c06da45142169b73c8457188161e46124a832053c7710703bd5ad20

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC7C2.tmp.bat

Filesize
213B

MD5
faed5d5ac1304c34f507a641eeb98f43

SHA1
f368c11ddfff321f8a33ecce0e44ebaf5ff281e4

SHA256
6c31b2dceb479c181e0f12c0208ecf289394805d642b9dd2b0af29abb4c3aa53

SHA512
c502faf88f7989d93fc4e80819c44ac322ebd011abc1efe95b60e4712cd34e9d2667f2b0c5c2baaa4de4d3209626c8bf1b3ce0cf752b7e47f7215dfaad9ad9d6

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

Filesize
42KB

MD5
e32cc14226ce47c9342ed347c7a47438

SHA1
a8ec8484eebdd76d38988007a21afe56cbeaf951

SHA256
59dd74a25d62b758529d2a9bfd5fefde30077b26249116ceffd01ce16b2688fa

SHA512
b164661ca40c386843b00cbeff8a86157a23f0e4c5e539fe596fad8786a1752ef50eaa65590a65ae1ca6512e720e3501fece61381b921f55e3ec4855f91bfc63

Download Submit
memory/3344-10-0x00007FFA2F050000-0x00007FFA2FB11000-memory.dmp

Filesize
10.8MB

Download
memory/3344-4-0x00007FFA2F050000-0x00007FFA2FB11000-memory.dmp

Filesize
10.8MB

Download
memory/3344-1-0x0000000000DB0000-0x0000000000DC0000-memory.dmp

Filesize
64KB

Download
memory/3344-3-0x00007FFA2F053000-0x00007FFA2F055000-memory.dmp

Filesize
8KB

Download
memory/3344-2-0x00007FFA2F050000-0x00007FFA2FB11000-memory.dmp

Filesize
10.8MB

Download
memory/3344-0-0x00007FFA2F053000-0x00007FFA2F055000-memory.dmp

Filesize
8KB

Download
memory/4288-26-0x0000000002D70000-0x0000000002D86000-memory.dmp

Filesize
88KB

Download
memory/4288-27-0x000000001D890000-0x000000001D8B0000-memory.dmp

Filesize
128KB

Download
memory/5076-19-0x00000246B3910000-0x00000246B3932000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads