silverrat | 64b1f050cbe98f8ecdc56cf7fb3a2a96fdeb3d5bad2053db36ba12a5fe5e92bb

Analysis

max time kernel
134s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
submitted
09/11/2024, 21:52

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General

Target
3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
Size 45KB
Sample241109-1q2ycawkfm
SHA256 64b1f050cbe98f8ecdc56cf7fb3a2a96fdeb3d5bad2053db36ba12a5fe5e92bb
MD5 5ec3267acfd4ef36cbfb796016142892
SHA1 3aab068d8c443560d02e4b58cf05e8f1b6d70f93
SHA512 96b707dc5bff8e986ff65e3a1f0f07ac61a8da7227f4754be5a89900613615d484a1be006a7162dd8e7ae0cc409ecef77ae0cfe1867b7920fe2854b068827b3b
SSDEEP 768:+bzAM+pp779X5zgiYVLWQ6l6+RULQW59Phnmz1QB6Sxy8vrI/bV:+bzAM+nrzmLl6lFGsa941Qo+y8s/bV
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

silverrat evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

kanibal.mooo.com:29853

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1096011178049802290/d9w9LhtbB8Cy4apceC6cLWfZWhlAAMAf3qABUNFcfpGyxXEk9Qtozf7gqlpK15fLwasp
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
4800	attrib.exe
3628	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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	$77EAAntiCheat.Installler.exe

Executes dropped EXE 1 IoCs

pid	Process
3340	$77EAAntiCheat.Installler.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\\AppData\\Roaming\\EA\\$77EAAntiCheat.Installler.exe\""	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4356	powershell.exe

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

Web Service

T1102

flow	ioc
21	discord.com
22	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
4460	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
1780	schtasks.exe
268	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
4356	powershell.exe
4356	powershell.exe
3340	$77EAAntiCheat.Installler.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2824	vssvc.exe
Token: SeRestorePrivilege	2824	vssvc.exe
Token: SeAuditPrivilege	2824	vssvc.exe
Token: SeDebugPrivilege	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
Token: SeDebugPrivilege	3340	$77EAAntiCheat.Installler.exe
Token: SeDebugPrivilege	4356	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3340	$77EAAntiCheat.Installler.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 232 wrote to memory of 4800	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	88
PID 232 wrote to memory of 4800	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	88
PID 232 wrote to memory of 3628	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	90
PID 232 wrote to memory of 3628	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	90
PID 232 wrote to memory of 364	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	105
PID 232 wrote to memory of 364	232	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	105
PID 364 wrote to memory of 4460	364	cmd.exe	107
PID 364 wrote to memory of 4460	364	cmd.exe	107
PID 364 wrote to memory of 3340	364	cmd.exe	108
PID 364 wrote to memory of 3340	364	cmd.exe	108
PID 3340 wrote to memory of 4956	3340	$77EAAntiCheat.Installler.exe	110
PID 3340 wrote to memory of 4956	3340	$77EAAntiCheat.Installler.exe	110
PID 3340 wrote to memory of 1780	3340	$77EAAntiCheat.Installler.exe	112
PID 3340 wrote to memory of 1780	3340	$77EAAntiCheat.Installler.exe	112
PID 3340 wrote to memory of 1300	3340	$77EAAntiCheat.Installler.exe	114
PID 3340 wrote to memory of 1300	3340	$77EAAntiCheat.Installler.exe	114
PID 3340 wrote to memory of 4356	3340	$77EAAntiCheat.Installler.exe	116
PID 3340 wrote to memory of 4356	3340	$77EAAntiCheat.Installler.exe	116
PID 3340 wrote to memory of 268	3340	$77EAAntiCheat.Installler.exe	118
PID 3340 wrote to memory of 268	3340	$77EAAntiCheat.Installler.exe	118

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
4800	attrib.exe
3628	attrib.exe

C:\Users\Admin\AppData\Local\Temp\3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
"C:\Users\Admin\AppData\Local\Temp\3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:232
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\EA"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4800
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3628
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE2AF.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:364
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4460
- - C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.exe
    "C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.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:3340
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77EAAntiCheat.Installler.exe
      4⤵
      PID:4956
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77EAAntiCheat.Installler.exe" /TR "C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.exe \"\$77EAAntiCheat.Installler.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1780
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77EAAntiCheat.Installler.exe
      4⤵
      PID:1300
  - - 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:4356
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "EAAntiCheat.Installler_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:268

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_1ad0ipol.auy.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1ad0ipol.auy.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

tmpE2AF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpE2AF.tmp.bat
Size 172B
SHA256 ad906cfee309d48075b032ac005e254b9ecdb69566b06e1fad181232699eeaf0
MD5 473b3a95643d5b793fe8970b7d235860
SHA1 740b8a7fcafcf6ab3dd6d632a6f90e5a7df71d0f
SHA512 323b3f80c5344574c13973e673c78f37fb7af818ee3cf85640864ac548e9d0dcb317f573f6ea0ef4b8f11f3fac8c823f18df801443973e9f6c1f764aa80cec1b
MD5 SHA1 SHA512

Submit Download

$77EAAntiCheat.Installler.exe

Path C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.exe
Size 45KB
SHA256 64b1f050cbe98f8ecdc56cf7fb3a2a96fdeb3d5bad2053db36ba12a5fe5e92bb
MD5 5ec3267acfd4ef36cbfb796016142892
SHA1 3aab068d8c443560d02e4b58cf05e8f1b6d70f93
SHA512 96b707dc5bff8e986ff65e3a1f0f07ac61a8da7227f4754be5a89900613615d484a1be006a7162dd8e7ae0cc409ecef77ae0cfe1867b7920fe2854b068827b3b
SSDEEP 768:+bzAM+pp779X5zgiYVLWQ6l6+RULQW59Phnmz1QB6Sxy8vrI/bV:+bzAM+nrzmLl6lFGsa941Qo+y8s/bV
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/232-0-0x00007FFDE1663000-0x00007FFDE1665000-memory.dmp

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memory/232-1-0x0000000000BA0000-0x0000000000BB0000-memory.dmp

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memory/232-2-0x00007FFDE1660000-0x00007FFDE2121000-memory.dmp

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memory/232-3-0x00007FFDE1663000-0x00007FFDE1665000-memory.dmp

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memory/232-4-0x00007FFDE1660000-0x00007FFDE2121000-memory.dmp

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memory/232-10-0x00007FFDE1660000-0x00007FFDE2121000-memory.dmp

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memory/4356-23-0x000002246FED0000-0x000002246FEF2000-memory.dmp

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