silverrat | ade8b0d3da6e1fef46848d51cc9d9ecfcc9149edbd450eec9e9a2d194d66674a

General

Target

SilverClient1.exe
Size

45KB
MD5

10c29d17cddebc5bc923d772d290dc07
SHA1

5a8921b88feb366603b53f9ce6262923d4f91007
SHA256

ade8b0d3da6e1fef46848d51cc9d9ecfcc9149edbd450eec9e9a2d194d66674a
SHA512

6370958e3bdeb30752a1c45b9a45053199532248b407a9b096a1165d5aff26b6945bf99ef57a20ef1a325e31f647c06ec77ad711fe0af29e9560784629505d48
SSDEEP

768:ojVlwJCpLU1T+mJX1fjFES0eMFauXCRULc9PEKe24MB6SvsSdSvriV8P:ojnpLUHDfj2qMsGY9s24Mo6s6SWV8P

Score

10^/10

silverrat evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

answer-patients.gl.at.ply.gg:9999

Mutex

SilverMutex_SDAVCufceR

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1312253993573154927/MAlWE1rv9VTYlLHyEAC7NMPsptI2-xQsJrqm0pXRFGSpkqsMY_fZrAYXEoW8Yc5JgYxA
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
cWZBYXRRU29UeEJrVW9MT0ZoZ2pFSUVEZWN4RkV5
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
3976	attrib.exe
3888	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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	SilverClient1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	$77Spoofer.exe

Executes dropped EXE 1 IoCs

pid	Process
4208	$77Spoofer.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\\SecHex\\$77Spoofer.exe\""	SilverClient1.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3780	powershell.exe

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

Web Service

T1102

flow	ioc
24	discord.com
25	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
3876	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
3436	schtasks.exe
1080	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
4884	SilverClient1.exe
3780	powershell.exe
3780	powershell.exe
4208	$77Spoofer.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2544	vssvc.exe
Token: SeRestorePrivilege	2544	vssvc.exe
Token: SeAuditPrivilege	2544	vssvc.exe
Token: SeDebugPrivilege	4884	SilverClient1.exe
Token: SeDebugPrivilege	4208	$77Spoofer.exe
Token: SeDebugPrivilege	3780	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4208	$77Spoofer.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4884 wrote to memory of 3976	4884	SilverClient1.exe	88
PID 4884 wrote to memory of 3976	4884	SilverClient1.exe	88
PID 4884 wrote to memory of 3888	4884	SilverClient1.exe	90
PID 4884 wrote to memory of 3888	4884	SilverClient1.exe	90
PID 4884 wrote to memory of 1468	4884	SilverClient1.exe	104
PID 4884 wrote to memory of 1468	4884	SilverClient1.exe	104
PID 1468 wrote to memory of 3876	1468	cmd.exe	106
PID 1468 wrote to memory of 3876	1468	cmd.exe	106
PID 1468 wrote to memory of 4208	1468	cmd.exe	107
PID 1468 wrote to memory of 4208	1468	cmd.exe	107
PID 4208 wrote to memory of 5072	4208	$77Spoofer.exe	109
PID 4208 wrote to memory of 5072	4208	$77Spoofer.exe	109
PID 4208 wrote to memory of 3436	4208	$77Spoofer.exe	111
PID 4208 wrote to memory of 3436	4208	$77Spoofer.exe	111
PID 4208 wrote to memory of 3100	4208	$77Spoofer.exe	113
PID 4208 wrote to memory of 3100	4208	$77Spoofer.exe	113
PID 4208 wrote to memory of 3780	4208	$77Spoofer.exe	115
PID 4208 wrote to memory of 3780	4208	$77Spoofer.exe	115
PID 4208 wrote to memory of 1080	4208	$77Spoofer.exe	116
PID 4208 wrote to memory of 1080	4208	$77Spoofer.exe	116

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
3976	attrib.exe
3888	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverClient1.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient1.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4884
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\SecHex"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3976
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3888
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF24F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3876
- - C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe
    "C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.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:4208
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Spoofer.exe
      4⤵
      PID:5072
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Spoofer.exe" /TR "C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe \"\$77Spoofer.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3436
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Spoofer.exe
      4⤵
      PID:3100
  - - 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:3780
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "Spoofer_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1080

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2544

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

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\__PSScriptPolicyTest_zgkw21ip.25e.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF24F.tmp.bat

Filesize
161B

MD5
c15b2677ef6bdb903ab8232421d106be

SHA1
325432aec2645a05cdda4311a58b807941e8d736

SHA256
fcf3ebb5c86cc6e17096db67788985fa076226767e1a4c9ab0b66feee8478d89

SHA512
15aee9ec85bdd888c5051c841695401c1c14a2573783e7c3f410ea6f0d4e76127a80ff25f94d00f7949ee4c90641ef642016f9657099af40a7b697ad3c0d43c3

Download Submit
C:\Users\Admin\AppData\Roaming\SecHex\$77Spoofer.exe

Filesize
45KB

MD5
10c29d17cddebc5bc923d772d290dc07

SHA1
5a8921b88feb366603b53f9ce6262923d4f91007

SHA256
ade8b0d3da6e1fef46848d51cc9d9ecfcc9149edbd450eec9e9a2d194d66674a

SHA512
6370958e3bdeb30752a1c45b9a45053199532248b407a9b096a1165d5aff26b6945bf99ef57a20ef1a325e31f647c06ec77ad711fe0af29e9560784629505d48

Download Submit
memory/3780-14-0x00000289F9CF0000-0x00000289F9D12000-memory.dmp

Filesize
136KB

Download
memory/4884-0-0x00007FFA392B3000-0x00007FFA392B5000-memory.dmp

Filesize
8KB

Download
memory/4884-1-0x0000000000EF0000-0x0000000000F00000-memory.dmp

Filesize
64KB

Download
memory/4884-2-0x00007FFA392B0000-0x00007FFA39D71000-memory.dmp

Filesize
10.8MB

Download
memory/4884-4-0x00007FFA392B3000-0x00007FFA392B5000-memory.dmp

Filesize
8KB

Download
memory/4884-5-0x00007FFA392B0000-0x00007FFA39D71000-memory.dmp

Filesize
10.8MB

Download
memory/4884-10-0x00007FFA392B0000-0x00007FFA39D71000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads