silverrat | d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799

General

Target

config.exe
Size

41KB
MD5

f04fdc29810e2b16364d85fdd50aa425
SHA1

eb097566fec9bd89079240fba838c4f64bbcc757
SHA256

d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799
SHA512

296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b
SSDEEP

768:QmfT4n0Xi16/0Pqq6XlEr+sukNx5y45kJYp7tDRUb0P9SSPYFz1QB6SgW21:xL4naigqolErNLxkAGIP9kB1QovW21

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
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.

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2400	attrib.exe
2892	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
864	$77discord.exe.exe

Loads dropped DLL 1 IoCs

pid	Process
528	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\\discord\\$77discord.exe.exe\""	config.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2120	powershell.exe

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

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.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

defense_evasion

pid	Process
1152	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
2248	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2728	config.exe
2728	config.exe
2728	config.exe
864	$77discord.exe.exe
2120	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	config.exe
Token: SeDebugPrivilege	864	$77discord.exe.exe
Token: SeDebugPrivilege	2120	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
864	$77discord.exe.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 2400	2728	config.exe	30
PID 2728 wrote to memory of 2400	2728	config.exe	30
PID 2728 wrote to memory of 2400	2728	config.exe	30
PID 2728 wrote to memory of 2892	2728	config.exe	32
PID 2728 wrote to memory of 2892	2728	config.exe	32
PID 2728 wrote to memory of 2892	2728	config.exe	32
PID 2728 wrote to memory of 528	2728	config.exe	34
PID 2728 wrote to memory of 528	2728	config.exe	34
PID 2728 wrote to memory of 528	2728	config.exe	34
PID 528 wrote to memory of 1152	528	cmd.exe	36
PID 528 wrote to memory of 1152	528	cmd.exe	36
PID 528 wrote to memory of 1152	528	cmd.exe	36
PID 528 wrote to memory of 864	528	cmd.exe	37
PID 528 wrote to memory of 864	528	cmd.exe	37
PID 528 wrote to memory of 864	528	cmd.exe	37
PID 864 wrote to memory of 2120	864	$77discord.exe.exe	39
PID 864 wrote to memory of 2120	864	$77discord.exe.exe	39
PID 864 wrote to memory of 2120	864	$77discord.exe.exe	39
PID 864 wrote to memory of 2248	864	$77discord.exe.exe	41
PID 864 wrote to memory of 2248	864	$77discord.exe.exe	41
PID 864 wrote to memory of 2248	864	$77discord.exe.exe	41

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

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2400	attrib.exe
2892	attrib.exe

C:\Users\Admin\AppData\Local\Temp\config.exe
"C:\Users\Admin\AppData\Local\Temp\config.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\discord"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2400
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\discord\$77discord.exe.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2892
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBDA4.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:528
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1152
- - C:\Users\Admin\discord\$77discord.exe.exe
    "C:\Users\Admin\discord\$77discord.exe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:864
  - - 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:2120
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "discord.exe_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpBDA4.tmp.bat

Filesize
150B

MD5
db404829663550224d6f01767d7d730c

SHA1
c407135c41ef14208e01c8b892d6589ad8fa85e5

SHA256
fd3ee5096613881d4cdc2ac49614e72654c2e232019b075061aba19d259768ec

SHA512
74be548b4b74a77abc03d47f5c42b4bd59e450afd56597742d54a28b9261f700701e0e9c031d9ba7ce6aaccb258a70a2c3cb4c7e8d1d617c420021762530e3d0

Download Submit
\Users\Admin\discord\$77discord.exe.exe

Filesize
41KB

MD5
f04fdc29810e2b16364d85fdd50aa425

SHA1
eb097566fec9bd89079240fba838c4f64bbcc757

SHA256
d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799

SHA512
296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b

Download Submit
memory/864-19-0x000000013F440000-0x000000013F44E000-memory.dmp

Filesize
56KB

Download
memory/2120-24-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/2120-25-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2728-0-0x000007FEF4E83000-0x000007FEF4E84000-memory.dmp

Filesize
4KB

Download
memory/2728-1-0x000000013F550000-0x000000013F55E000-memory.dmp

Filesize
56KB

Download
memory/2728-2-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2728-3-0x000007FEF4E83000-0x000007FEF4E84000-memory.dmp

Filesize
4KB

Download
memory/2728-4-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download
memory/2728-14-0x000007FEF4E80000-0x000007FEF586C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads