silverrat | 64b1f050cbe98f8ecdc56cf7fb3a2a96fdeb3d5bad2053db36ba12a5fe5e92bb

Analysis

max time kernel
135s
max time network
146s
platform
windows7_x64
resource
win7-20240903-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
2688	attrib.exe
2304	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1604	$77EAAntiCheat.Installler.exe

Loads dropped DLL 1 IoCs

pid	Process
1072	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\\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
2172	powershell.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
2932	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
3056	schtasks.exe
1852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
2172	powershell.exe
1604	$77EAAntiCheat.Installler.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2564	vssvc.exe
Token: SeRestorePrivilege	2564	vssvc.exe
Token: SeAuditPrivilege	2564	vssvc.exe
Token: SeDebugPrivilege	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
Token: SeDebugPrivilege	1604	$77EAAntiCheat.Installler.exe
Token: SeDebugPrivilege	2172	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1604	$77EAAntiCheat.Installler.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2548 wrote to memory of 2688	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	34
PID 2548 wrote to memory of 2688	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	34
PID 2548 wrote to memory of 2688	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	34
PID 2548 wrote to memory of 2304	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	36
PID 2548 wrote to memory of 2304	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	36
PID 2548 wrote to memory of 2304	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	36
PID 2548 wrote to memory of 1072	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	39
PID 2548 wrote to memory of 1072	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	39
PID 2548 wrote to memory of 1072	2548	3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe	39
PID 1072 wrote to memory of 2932	1072	cmd.exe	41
PID 1072 wrote to memory of 2932	1072	cmd.exe	41
PID 1072 wrote to memory of 2932	1072	cmd.exe	41
PID 1072 wrote to memory of 1604	1072	cmd.exe	42
PID 1072 wrote to memory of 1604	1072	cmd.exe	42
PID 1072 wrote to memory of 1604	1072	cmd.exe	42
PID 1604 wrote to memory of 2648	1604	$77EAAntiCheat.Installler.exe	44
PID 1604 wrote to memory of 2648	1604	$77EAAntiCheat.Installler.exe	44
PID 1604 wrote to memory of 2648	1604	$77EAAntiCheat.Installler.exe	44
PID 1604 wrote to memory of 3056	1604	$77EAAntiCheat.Installler.exe	46
PID 1604 wrote to memory of 3056	1604	$77EAAntiCheat.Installler.exe	46
PID 1604 wrote to memory of 3056	1604	$77EAAntiCheat.Installler.exe	46
PID 1604 wrote to memory of 2316	1604	$77EAAntiCheat.Installler.exe	48
PID 1604 wrote to memory of 2316	1604	$77EAAntiCheat.Installler.exe	48
PID 1604 wrote to memory of 2316	1604	$77EAAntiCheat.Installler.exe	48
PID 1604 wrote to memory of 2172	1604	$77EAAntiCheat.Installler.exe	50
PID 1604 wrote to memory of 2172	1604	$77EAAntiCheat.Installler.exe	50
PID 1604 wrote to memory of 2172	1604	$77EAAntiCheat.Installler.exe	50
PID 1604 wrote to memory of 1852	1604	$77EAAntiCheat.Installler.exe	52
PID 1604 wrote to memory of 1852	1604	$77EAAntiCheat.Installler.exe	52
PID 1604 wrote to memory of 1852	1604	$77EAAntiCheat.Installler.exe	52

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
2688	attrib.exe
2304	attrib.exe

C:\Users\Admin\AppData\Local\Temp\3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe
"C:\Users\Admin\AppData\Local\Temp\3aab068d8c443560d02e4b58cf05e8f1b6d70f93.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2548
- 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:2688
- 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:2304
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp271.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1072
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2932
- - C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.exe
    "C:\Users\Admin\AppData\Roaming\EA\$77EAAntiCheat.Installler.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1604
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77EAAntiCheat.Installler.exe
      4⤵
      PID:2648
  - - 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:3056
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77EAAntiCheat.Installler.exe
      4⤵
      PID:2316
  - - 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:2172
  - - 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:1852

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2564

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

tmp271.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp271.tmp.bat
Size 171B
SHA256 59335261dedeef31ce93d463275196e1807b81e3bda6d7dc4e8e7d290760e0c6
MD5 669d66723dfcd1660d41565b298ecfaa
SHA1 751e6ffba26fbf494985ec1db898f77d293640ca
SHA512 20f953cbf80e199aa17e49d1ab6a39fc7d39cf6d734ba13dcdfd488ebf7c4d4615eb49177157fbf357ae2c686ed6b1ba4c3a2e0ef7223eaeb0a7b14786a7550b
MD5 SHA1 SHA512

Submit Download

$77EAAntiCheat.Installler.exe

Path \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/1604-19-0x000000013F750000-0x000000013F760000-memory.dmp

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memory/2172-24-0x000000001B800000-0x000000001BAE2000-memory.dmp

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memory/2172-25-0x0000000002790000-0x0000000002798000-memory.dmp

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memory/2548-0-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp

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memory/2548-1-0x000000013FD60000-0x000000013FD70000-memory.dmp

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memory/2548-2-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

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memory/2548-3-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp

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memory/2548-4-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

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memory/2548-14-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp

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