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
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
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
4488	attrib.exe
2032	attrib.exe

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Windows Security Notification.exe

Executes dropped EXE 1 IoCs

pid	Process
2932	$77Windows Security Notification.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
20	discord.com
21	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
2260	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
2664	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
3792	Windows Security Notification.exe
2932	$77Windows Security Notification.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeBackupPrivilege	3160	vssvc.exe
Token: SeRestorePrivilege	3160	vssvc.exe
Token: SeAuditPrivilege	3160	vssvc.exe
Token: SeDebugPrivilege	3792	Windows Security Notification.exe
Token: SeDebugPrivilege	2932	$77Windows Security Notification.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2932	$77Windows Security Notification.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3792 wrote to memory of 2032	3792	Windows Security Notification.exe	86
PID 3792 wrote to memory of 2032	3792	Windows Security Notification.exe	86
PID 3792 wrote to memory of 4488	3792	Windows Security Notification.exe	88
PID 3792 wrote to memory of 4488	3792	Windows Security Notification.exe	88
PID 3792 wrote to memory of 1768	3792	Windows Security Notification.exe	96
PID 3792 wrote to memory of 1768	3792	Windows Security Notification.exe	96
PID 1768 wrote to memory of 2260	1768	cmd.exe	98
PID 1768 wrote to memory of 2260	1768	cmd.exe	98
PID 1768 wrote to memory of 2932	1768	cmd.exe	99
PID 1768 wrote to memory of 2932	1768	cmd.exe	99
PID 2932 wrote to memory of 3948	2932	$77Windows Security Notification.exe	101
PID 2932 wrote to memory of 3948	2932	$77Windows Security Notification.exe	101
PID 2932 wrote to memory of 2664	2932	$77Windows Security Notification.exe	103
PID 2932 wrote to memory of 2664	2932	$77Windows Security Notification.exe	103
PID 2932 wrote to memory of 2472	2932	$77Windows Security Notification.exe	105
PID 2932 wrote to memory of 2472	2932	$77Windows Security Notification.exe	105

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
2032	attrib.exe
4488	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Windows Security Notification.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Security Notification.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3792
- 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:2032
- 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:4488
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB248.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1768
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2260
- - 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:2932
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Windows Security Notification.exe
      4⤵
      PID:3948
  - - 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:2664
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Windows Security Notification.exe
      4⤵
      PID:2472

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3160

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB248.tmp.bat

Filesize
190B

MD5
3cf5be0492cebb32d7a64376e769eab4

SHA1
722e3ab0e74f5a06eab54155cbaca5a5f0d23ff3

SHA256
8bab21efa43e6ec5592024faa0e0ce6c7d3bd1a5d8a1a11d90ad0f5a7a4f5c5a

SHA512
4ffece7d3468bba6ef195d85f3a807a5de6d9604fe1e0b870b490d881d3f5c312a9c77cb23302e1db52f832f00d55c1e8302d1ae9cf0da2244d986afa620c37e

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

Filesize
45KB

MD5
5fda3d7416d93b283fcfac83b8f43545

SHA1
7a02df298674f3f1c83f1417e9ff1ad096d94a3f

SHA256
00de7adc67830d497e8a0a97e2de7b8fe671461d15c2141a822a07137f237991

SHA512
68272ad67cf8c340ced850c7f0dd46594e4071e92347ede68089afc908509f4f1b8c7fda56c35e4145fdd09ce68a8ce26670bdac89abd0b826cb8af475a0d7d9

Download Submit
memory/3792-0-0x00007FFD47823000-0x00007FFD47825000-memory.dmp

Filesize
8KB

Download
memory/3792-1-0x0000000000D50000-0x0000000000D60000-memory.dmp

Filesize
64KB

Download
memory/3792-2-0x00007FFD47820000-0x00007FFD482E1000-memory.dmp

Filesize
10.8MB

Download
memory/3792-3-0x00007FFD47823000-0x00007FFD47825000-memory.dmp

Filesize
8KB

Download
memory/3792-4-0x00007FFD47820000-0x00007FFD482E1000-memory.dmp

Filesize
10.8MB

Download
memory/3792-10-0x00007FFD47820000-0x00007FFD482E1000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads