silverrat | 166fc117f762f70928200d37c24352583e1aca1aba54429975ac828452cf5ff0

General

Target

Rat.exe
Size

45KB
MD5

c41469be0e653ddb4552a3f1a16caba6
SHA1

d2e0c8d5bd49337b5cef1f325632ba6c356d5661
SHA256

166fc117f762f70928200d37c24352583e1aca1aba54429975ac828452cf5ff0
SHA512

0599b00efc97b7805679040903e9b5f7fdfa7c4e00e7b12fc0a79b89286dea6665efd87f817b9b9f8e2e165714df07e8dbe21b3121b0af3f6f3c87b10837c749
SSDEEP

768:00Mk3L5X0UC22ynqUS08+oRULQcN9hzyxJjB6SV38vrL/we:00M/my7Gs698bo638v/we

Score

10^/10

silverrat defense_evasion discovery execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

buying-magic.gl.at.ply.gg:17699

Mutex

SilverMutex_mCvmEafTxB

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1339299451642314845/g1Gv5jULSz8Pebm4NzbJROiNI4YMerdc5dgzha88cgyOa16Ji2c67zQdw45RArDpsUDf
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
SFloWnRSeGdTU1NRTFBBYWREQ0NCRldsRnN1SllL
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
2
server_signature
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

Signatures

SilverRat
SilverRat is trojan written in C#.
trojan silverrat
Silverrat family
silverrat

Downloads MZ/PE file 1 IoCs

flow	pid	Process
22	1160	Process not Found

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
4516	attrib.exe
1364	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-1-5-21-2656314083-4170277356-267438488-1000\Control Panel\International\Geo\Nation	$77Windows Security Process.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2656314083-4170277356-267438488-1000\Control Panel\International\Geo\Nation	Rat.exe

Executes dropped EXE 1 IoCs

pid	Process
4704	$77Windows Security Process.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\\zt-WD\\$77Windows Security Process.exe\""	Rat.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4116	powershell.exe

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

Web Service

T1102

flow	ioc
26	discord.com
30	discord.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
5088	MicrosoftEdgeUpdate.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3160	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
3120	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4772	Rat.exe
4116	powershell.exe
4116	powershell.exe
4704	$77Windows Security Process.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	1764	vssvc.exe
Token: SeRestorePrivilege	1764	vssvc.exe
Token: SeAuditPrivilege	1764	vssvc.exe
Token: SeDebugPrivilege	4772	Rat.exe
Token: SeDebugPrivilege	4704	$77Windows Security Process.exe
Token: SeDebugPrivilege	4116	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4704	$77Windows Security Process.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 4516	4772	Rat.exe	95
PID 4772 wrote to memory of 4516	4772	Rat.exe	95
PID 4772 wrote to memory of 1364	4772	Rat.exe	97
PID 4772 wrote to memory of 1364	4772	Rat.exe	97
PID 4772 wrote to memory of 2688	4772	Rat.exe	102
PID 4772 wrote to memory of 2688	4772	Rat.exe	102
PID 2688 wrote to memory of 3160	2688	cmd.exe	104
PID 2688 wrote to memory of 3160	2688	cmd.exe	104
PID 2688 wrote to memory of 4704	2688	cmd.exe	105
PID 2688 wrote to memory of 4704	2688	cmd.exe	105
PID 4704 wrote to memory of 216	4704	$77Windows Security Process.exe	108
PID 4704 wrote to memory of 216	4704	$77Windows Security Process.exe	108
PID 4704 wrote to memory of 3120	4704	$77Windows Security Process.exe	110
PID 4704 wrote to memory of 3120	4704	$77Windows Security Process.exe	110
PID 4704 wrote to memory of 4948	4704	$77Windows Security Process.exe	112
PID 4704 wrote to memory of 4948	4704	$77Windows Security Process.exe	112
PID 4704 wrote to memory of 4116	4704	$77Windows Security Process.exe	114
PID 4704 wrote to memory of 4116	4704	$77Windows Security Process.exe	114

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

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
4516	attrib.exe
1364	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Rat.exe
"C:\Users\Admin\AppData\Local\Temp\Rat.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\zt-WD"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4516
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1364
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC65D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2688
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3160
- - C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.exe
    "C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.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:4704
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Windows Security Process.exe
      4⤵
      PID:216
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77Windows Security Process.exe" /TR "C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.exe \"\$77Windows Security Process.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3120
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77Windows Security Process.exe
      4⤵
      PID:4948
  - - 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:4116

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1764

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODM0MTAiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1NTUzNjg2NzAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0Njg1OTkyNjgwIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:5088

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_klqablso.uw5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC65D.tmp.bat

Filesize
177B

MD5
b14be60f6d9d5acaaad2ff624ea55d7f

SHA1
eca1e268d910460c388c07998660e61a344d6a4e

SHA256
80486d85315059fb086739d987dfe65e183825d65bf297168bc0fe7a5ae56130

SHA512
84facc3d687db35da699054c0b36637fc90edb83964397fc64a75df909e421979a1f59c3fab7895ade655a8387a866034e66807ac6876466e45de43cc60c2579

Download Submit
C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.exe

Filesize
45KB

MD5
c41469be0e653ddb4552a3f1a16caba6

SHA1
d2e0c8d5bd49337b5cef1f325632ba6c356d5661

SHA256
166fc117f762f70928200d37c24352583e1aca1aba54429975ac828452cf5ff0

SHA512
0599b00efc97b7805679040903e9b5f7fdfa7c4e00e7b12fc0a79b89286dea6665efd87f817b9b9f8e2e165714df07e8dbe21b3121b0af3f6f3c87b10837c749

Download Submit
memory/4116-15-0x000001E3A95C0000-0x000001E3A95E2000-memory.dmp

Filesize
136KB

Download
memory/4772-0-0x00007FFA673C3000-0x00007FFA673C5000-memory.dmp

Filesize
8KB

Download
memory/4772-1-0x0000000000820000-0x0000000000830000-memory.dmp

Filesize
64KB

Download
memory/4772-2-0x00007FFA673C0000-0x00007FFA67E81000-memory.dmp

Filesize
10.8MB

Download
memory/4772-4-0x00007FFA673C3000-0x00007FFA673C5000-memory.dmp

Filesize
8KB

Download
memory/4772-5-0x00007FFA673C0000-0x00007FFA67E81000-memory.dmp

Filesize
10.8MB

Download
memory/4772-11-0x00007FFA673C0000-0x00007FFA67E81000-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