silverrat | ebb23e2966d195bce807cbe2d06058402e010bc919d76819847644673bfdbce2

Analysis

max time kernel
134s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31-12-2024 16:58

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General

Target

SilverRat V1.5 [Re Lab]/Fixer.exe
Size

45KB
MD5

545d64cc91e4da6339a70d54a2443c5d
SHA1

f03344ab824c7cf0f73dcc86aa34cab36e2e54e7
SHA256

04109cb3426408945bea79e8e355285fb5bf93224b5b2775a5f6ff6c1e992b5f
SHA512

733154a7f76840fad3ead2af149cf708807878ef3f08c62232ee3cdc0b7e6a4b4dc338103569daf9f755a6549475df15b34b7f223929348001d4086e83371681
SSDEEP

768:OarX4D9pmZGOXnXhEk75rVeZtxbuRULQj9SEQf9B6SbuDFvr1/xf:OarID9pVU5rVe3xCGsj9O9oQ2Fx/xf

Score

10^/10

silverrat evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

auto-london.gl.at.ply.gg:51655

Mutex

SilverMutex_kTAAZjMenK

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1253749007772160090/mxExcAUGlJgTCbYOk_u7JJAnNpsIhMne5e0PjqkRY2MV_40Bgpix2Ezib84aFxRmN66j
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
QnZ2VW1rTFlUa09ESXhCRkdHYURSSlBBdk5SQk5J
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
0
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
1368	attrib.exe
636	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1764	$77Runtime Broker.exe

Loads dropped DLL 1 IoCs

pid	Process
2844	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\\Microsoft\\Windows\\Templates\\hgfdfd\\$77Runtime Broker.exe\""	Fixer.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1240	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
1448	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
2132	schtasks.exe
2136	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2512	Fixer.exe
2512	Fixer.exe
2512	Fixer.exe
1240	powershell.exe
1764	$77Runtime Broker.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	1996	vssvc.exe
Token: SeRestorePrivilege	1996	vssvc.exe
Token: SeAuditPrivilege	1996	vssvc.exe
Token: SeDebugPrivilege	2512	Fixer.exe
Token: SeDebugPrivilege	1764	$77Runtime Broker.exe
Token: SeDebugPrivilege	1240	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1764	$77Runtime Broker.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 1368	2512	Fixer.exe	35
PID 2512 wrote to memory of 1368	2512	Fixer.exe	35
PID 2512 wrote to memory of 1368	2512	Fixer.exe	35
PID 2512 wrote to memory of 636	2512	Fixer.exe	37
PID 2512 wrote to memory of 636	2512	Fixer.exe	37
PID 2512 wrote to memory of 636	2512	Fixer.exe	37
PID 2512 wrote to memory of 2844	2512	Fixer.exe	39
PID 2512 wrote to memory of 2844	2512	Fixer.exe	39
PID 2512 wrote to memory of 2844	2512	Fixer.exe	39
PID 2844 wrote to memory of 1448	2844	cmd.exe	41
PID 2844 wrote to memory of 1448	2844	cmd.exe	41
PID 2844 wrote to memory of 1448	2844	cmd.exe	41
PID 2844 wrote to memory of 1764	2844	cmd.exe	42
PID 2844 wrote to memory of 1764	2844	cmd.exe	42
PID 2844 wrote to memory of 1764	2844	cmd.exe	42
PID 1764 wrote to memory of 2980	1764	$77Runtime Broker.exe	44
PID 1764 wrote to memory of 2980	1764	$77Runtime Broker.exe	44
PID 1764 wrote to memory of 2980	1764	$77Runtime Broker.exe	44
PID 1764 wrote to memory of 2132	1764	$77Runtime Broker.exe	46
PID 1764 wrote to memory of 2132	1764	$77Runtime Broker.exe	46
PID 1764 wrote to memory of 2132	1764	$77Runtime Broker.exe	46
PID 1764 wrote to memory of 2100	1764	$77Runtime Broker.exe	48
PID 1764 wrote to memory of 2100	1764	$77Runtime Broker.exe	48
PID 1764 wrote to memory of 2100	1764	$77Runtime Broker.exe	48
PID 1764 wrote to memory of 1240	1764	$77Runtime Broker.exe	50
PID 1764 wrote to memory of 1240	1764	$77Runtime Broker.exe	50
PID 1764 wrote to memory of 1240	1764	$77Runtime Broker.exe	50
PID 1764 wrote to memory of 2136	1764	$77Runtime Broker.exe	52
PID 1764 wrote to memory of 2136	1764	$77Runtime Broker.exe	52
PID 1764 wrote to memory of 2136	1764	$77Runtime Broker.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
1368	attrib.exe
636	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverRat V1.5 [Re Lab]\Fixer.exe
"C:\Users\Admin\AppData\Local\Temp\SilverRat V1.5 [Re Lab]\Fixer.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1368
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:636
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp3949.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2844
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1448
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1764
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2980
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Runtime Broker.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe \"\$77Runtime Broker.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2132
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77Runtime Broker.exe
      4⤵
      PID:2100
  - - 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:1240
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "Runtime Broker_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2136

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1996

C:\Windows\system32\taskeng.exe
taskeng.exe {090FEB59-137F-4D0D-A051-7D6A0E097475} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
1⤵
PID:1028

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp3949.tmp.bat

Filesize
196B

MD5
c17470c94fe63ec44d4983b47232a3fc

SHA1
a51aebe790eed35e8c5b3f3e415d95bf095c3ac8

SHA256
32b48f7e29df443f5de1327f756277a51bbd6278b344551d520946e4eaf98b82

SHA512
b26789f08caa8214137af4c7b9ecc082ce6a21cfe214925d53a58d0aa2e8dbfa35924edcf7adb20584c4023ee8edacbce9469d2f2f032b556a151607371c008d

Download Submit
\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\hgfdfd\$77Runtime Broker.exe

Filesize
45KB

MD5
545d64cc91e4da6339a70d54a2443c5d

SHA1
f03344ab824c7cf0f73dcc86aa34cab36e2e54e7

SHA256
04109cb3426408945bea79e8e355285fb5bf93224b5b2775a5f6ff6c1e992b5f

SHA512
733154a7f76840fad3ead2af149cf708807878ef3f08c62232ee3cdc0b7e6a4b4dc338103569daf9f755a6549475df15b34b7f223929348001d4086e83371681

Download Submit
memory/1240-24-0x000000001B570000-0x000000001B852000-memory.dmp

Filesize
2.9MB

Download
memory/1240-25-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download
memory/1764-19-0x000000013F6B0000-0x000000013F6C0000-memory.dmp

Filesize
64KB

Download
memory/2512-0-0x000007FEF5873000-0x000007FEF5874000-memory.dmp

Filesize
4KB

Download
memory/2512-1-0x000000013FDA0000-0x000000013FDB0000-memory.dmp

Filesize
64KB

Download
memory/2512-2-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2512-3-0x000007FEF5873000-0x000007FEF5874000-memory.dmp

Filesize
4KB

Download
memory/2512-4-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2512-14-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download