silverrat | 00de7adc67830d497e8a0a97e2de7b8fe671461d15c2141a822a07137f237991

General

Target

Windows Security Notification.exe
Size

45KB
MD5

5fda3d7416d93b283fcfac83b8f43545
SHA1

7a02df298674f3f1c83f1417e9ff1ad096d94a3f
SHA256

00de7adc67830d497e8a0a97e2de7b8fe671461d15c2141a822a07137f237991
SHA512

68272ad67cf8c340ced850c7f0dd46594e4071e92347ede68089afc908509f4f1b8c7fda56c35e4145fdd09ce68a8ce26670bdac89abd0b826cb8af475a0d7d9
SSDEEP

768:3NIuPbqQXm/tfDffXG4Jeim+ecRULQWB9hsyz1QB6SpAdvru/CS:3zPU/tfL/hmpcGsA931Qo0AdS/CS

Score

10^/10

silverrat evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

FBIInvestigation-50886.portmap.host:50886

Mutex

lAxDBRhAFu

Attributes

certificate
MIIE4DCCAsigAwIBAgIQAKQYOfZd86J2BfNjhG4CWTANBgkqhkiG9w0BAQ0FADARMQ8wDQYDVQQDDAZTaWx2ZXIwIBcNMjIwODI2MTkwMTA4WhgPOTk5OTEyMzEyMzU5NTlaMBExDzANBgNVBAMMBlNpbHZlcjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAPbpOWfhZTuOfEaqqImTTe5dNHAAry7/mf00DCoI4lPZfypsc1tYraxSPFeayGu09a3qdhkWKSVIgwnu2n4GLQNOCY9fh/1oyrX4Iir3BIkYeU7pKTWgjhUlAmFAUAaNr0ca23Ku2kN79jrDzRznOgE2DEW4p7OiM4Mb097ma9lzu7MyssHbY4VCteAhj9HZiplqBxaC1vXDmzxqG+gUZ1aLcyG7ssdkOjtWVBgT3gD/gOl7KchRzCFB1egDC/vD9WZCG35U3Ngi+IkTznoXR1R06cq4v0UnGjE37R2vcB21qb0ZYNiZJXZHv5i9+R7xoPeNoLda5PqnfGGbhPvNEdD56mdcOKlzGIuyemLkUo8texdpiBWKbtc3JZf5VsKxjJtHDK3xW6gDGI+PAirzGkFPmwcf8WgsblvzLg8OZpVxVs8rmKWoi6qIrf4CXnyl73J4lgzW+ir7PjANAQXwLNGdNnvdMeLeo/muGQPdeNpr6OczGGnkWA4qniHeL51/Gx0a8A+jP9zKiyu+qHcsP2IotgWDH/KlzJVr7IAum+DV92uV8poTDcUNcHaKvhHA65KmEtsvLbK6lFZcAMC0eWC0VgpW44T1/16rOaaky5mP6rTMc3nSyOl/lU/XgAgGGQPe22bRLWYzd3WVeEpI1WnHYXS+tL9IOe4kJP+pYsWDAgMBAAGjMjAwMB0GA1UdDgQWBBR32TJj2LeUx9L+RcSOvmFV6VJq6TAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBDQUAA4ICAQA+qucSOi7ov7Q1FmAjMf925KuvKuCNwJiu3Sqo3FDGVAD1fAwAi2FdyuXEO2VIUPZCkalFcBna5rqyrc6tcS4T0IL2TsYLrsuGir7PWP7CAcft1urYS1HpNpHxeH/nixwnQaQs/MuRmdm2TeCj6G21P5BTW55U5y9sMPSYwhbD2N7XLgnSQd5Y+80TR7FUiye/k3D37fI9PRhSQGbfYFRQQTmxj84dPTnY5CVgaY9d8fNiFZkyjaZdf+mibK0xQTf+xLVVj+toDNCkc1F462TdmFhCrHd4PoMo0yLDNv4SC6NLRq4haWDRtORw6gd5GYIoCQ3m3oQvNlNxXhhIjsOyxkxOrkCD0c+57PIc7EmKXieJa/XxnkcIVxO8dvTY/vijuz/VaZYl/lPu9ckuqgJ1wRvvsHl70Trv4Mn4X5uCIqRFFlK/mSOZbLIguGkDN3QIZABvej89vlZMhrVfZOG2oawe23FskHjv7thF/WzOXtWw6RUVC1V+hCwbuxFNUjZmmOTUwdXHnus7I2AuiG6Jz1+y9aYiXBcVTdSljxjHRRmiRaAnY94h58vN8NJ4hKL2GVCo6LxkpuplmcntJN0cKraKTPxSXcCRrqWxX9qoIbfvBcUU4vH1jPJCCLNCuDyD3lgQkpPVvq0EMU1a2HFGgMEQMjpYpb38rcadDhT5ag==
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1307565058028736522/BvuPOnvMCGBluGhgPBunWxSW6sccMPE50iCM97Bct0vExaNkF3__xy6dkdmzHQG2t597
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
4
server_signature
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

Signatures

SilverRat
SilverRat is trojan written in C#.
trojan silverrat
Silverrat family
silverrat

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
2092	attrib.exe
1120	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1860	$77Windows Security Notification.exe

Loads dropped DLL 1 IoCs

pid	Process
3004	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\\Windows Security Notification\\$77Windows Security Notification.exe\""	Windows Security Notification.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	discord.com
5	discord.com

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
1392	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2180	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
376	Windows Security Notification.exe
376	Windows Security Notification.exe
376	Windows Security Notification.exe
1860	$77Windows Security Notification.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeBackupPrivilege	2808	vssvc.exe
Token: SeRestorePrivilege	2808	vssvc.exe
Token: SeAuditPrivilege	2808	vssvc.exe
Token: SeDebugPrivilege	376	Windows Security Notification.exe
Token: SeDebugPrivilege	1860	$77Windows Security Notification.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1860	$77Windows Security Notification.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 1120	376	Windows Security Notification.exe	34
PID 376 wrote to memory of 1120	376	Windows Security Notification.exe	34
PID 376 wrote to memory of 1120	376	Windows Security Notification.exe	34
PID 376 wrote to memory of 2092	376	Windows Security Notification.exe	36
PID 376 wrote to memory of 2092	376	Windows Security Notification.exe	36
PID 376 wrote to memory of 2092	376	Windows Security Notification.exe	36
PID 376 wrote to memory of 3004	376	Windows Security Notification.exe	38
PID 376 wrote to memory of 3004	376	Windows Security Notification.exe	38
PID 376 wrote to memory of 3004	376	Windows Security Notification.exe	38
PID 3004 wrote to memory of 1392	3004	cmd.exe	40
PID 3004 wrote to memory of 1392	3004	cmd.exe	40
PID 3004 wrote to memory of 1392	3004	cmd.exe	40
PID 3004 wrote to memory of 1860	3004	cmd.exe	41
PID 3004 wrote to memory of 1860	3004	cmd.exe	41
PID 3004 wrote to memory of 1860	3004	cmd.exe	41
PID 1860 wrote to memory of 1616	1860	$77Windows Security Notification.exe	43
PID 1860 wrote to memory of 1616	1860	$77Windows Security Notification.exe	43
PID 1860 wrote to memory of 1616	1860	$77Windows Security Notification.exe	43
PID 1860 wrote to memory of 2180	1860	$77Windows Security Notification.exe	45
PID 1860 wrote to memory of 2180	1860	$77Windows Security Notification.exe	45
PID 1860 wrote to memory of 2180	1860	$77Windows Security Notification.exe	45
PID 1860 wrote to memory of 2436	1860	$77Windows Security Notification.exe	47
PID 1860 wrote to memory of 2436	1860	$77Windows Security Notification.exe	47
PID 1860 wrote to memory of 2436	1860	$77Windows Security Notification.exe	47

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
1120	attrib.exe
2092	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Windows Security Notification.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Security Notification.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:376
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Windows Security Notification"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1120
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\Windows Security Notification\$77Windows Security Notification.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2092
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB912.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1392
- - C:\Users\Admin\Windows Security Notification\$77Windows Security Notification.exe
    "C:\Users\Admin\Windows Security Notification\$77Windows Security Notification.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1860
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Windows Security Notification.exe
      4⤵
      PID:1616
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Windows Security Notification.exe" /TR "C:\Users\Admin\Windows Security Notification\$77Windows Security Notification.exe \"\$77Windows Security Notification.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2180
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Windows Security Notification.exe
      4⤵
      PID:2436

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB912.tmp.bat

Filesize
190B

MD5
6f03c236cfdab98ab10354306b12ddcc

SHA1
f594cea28a34b84db8fa58c55fa27593d5edc173

SHA256
abd6a8d3536b331ec62c7e6104be354a5e0aa1194b16d06bdbbca71c1963d10c

SHA512
6bb3db3b96903cd16832fe9fd5816b2a49a180211c3c5780b7f82d7dd12eef9d7385ebe25b301cd5f1fc88ac13e1359c6e3f0575a9cba96b224b48a2eecec52a

Download Submit
\Users\Admin\Windows Security Notification\$77Windows Security Notification.exe

Filesize
45KB

MD5
5fda3d7416d93b283fcfac83b8f43545

SHA1
7a02df298674f3f1c83f1417e9ff1ad096d94a3f

SHA256
00de7adc67830d497e8a0a97e2de7b8fe671461d15c2141a822a07137f237991

SHA512
68272ad67cf8c340ced850c7f0dd46594e4071e92347ede68089afc908509f4f1b8c7fda56c35e4145fdd09ce68a8ce26670bdac89abd0b826cb8af475a0d7d9

Download Submit
memory/376-0-0x000007FEF5F73000-0x000007FEF5F74000-memory.dmp

Filesize
4KB

Download
memory/376-1-0x000000013FC10000-0x000000013FC20000-memory.dmp

Filesize
64KB

Download
memory/376-2-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/376-3-0x000007FEF5F73000-0x000007FEF5F74000-memory.dmp

Filesize
4KB

Download
memory/376-4-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/376-14-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/1860-19-0x000000013F310000-0x000000013F320000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads