silverrat | 04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966

General

Target

04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
Size

45KB
MD5

777493fb1a1ebb63fb49111ceb84d5fe
SHA1

589b529e67ae593bde8c77c24ff6a14e72696d99
SHA256

04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966
SHA512

d01ef318042fa32a81ba3451bdaa97dbeffe384d3e8d0282cae52548fcb422cbbbc856e11c2e65313e5e95de2256a495961804643e770cb860fb5aba38c9e66e
SSDEEP

768:R6sg/BD9qVKOXnXhEk75rrmt1E+cXjA6RULQv9SpQ9hD1B6SEJvrc/xU:R6sgJD9q8U5rCwjA6Gsv9TF1oVJo/xU

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

127.0.0.1:7777

Mutex

SilverMutex_rRFGGPWbDL

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discordapp.com/api/webhooks/1354344972534550572/iYaCJzbXkLb3YT6yUhx_-NiWb1GadYyNw4eCuscw0WHsCZ3xCxErc2s6bSsEQ3LUa0nl
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
eWhTQVpxY2hiWVREZmZUVUdEckliYXlSdE9TTGNV
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.

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
5468	attrib.exe
2628	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-1-5-21-83325578-304917428-1200496059-1000\Control Panel\International\Geo\Nation	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
Key value queried	\REGISTRY\USER\S-1-5-21-83325578-304917428-1200496059-1000\Control Panel\International\Geo\Nation	$77sd.exe

Executes dropped EXE 2 IoCs

pid	Process
4588	$77sd.exe
4688	$77sd.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\\dw\\$77sd.exe\""	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4972	powershell.exe

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
5100	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
2200	schtasks.exe
4524	schtasks.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
4972	powershell.exe
4972	powershell.exe
4972	powershell.exe
4588	$77sd.exe
4588	$77sd.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	4248	vssvc.exe
Token: SeRestorePrivilege	4248	vssvc.exe
Token: SeAuditPrivilege	4248	vssvc.exe
Token: SeDebugPrivilege	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
Token: SeDebugPrivilege	4588	$77sd.exe
Token: SeDebugPrivilege	4972	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4588	$77sd.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 5484 wrote to memory of 5468	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe	93
PID 5484 wrote to memory of 5468	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe	93
PID 5484 wrote to memory of 2628	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe	95
PID 5484 wrote to memory of 2628	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe	95
PID 5484 wrote to memory of 3652	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe	104
PID 5484 wrote to memory of 3652	5484	04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe	104
PID 3652 wrote to memory of 5100	3652	cmd.exe	107
PID 3652 wrote to memory of 5100	3652	cmd.exe	107
PID 4276 wrote to memory of 4588	4276	cmd.exe	108
PID 4276 wrote to memory of 4588	4276	cmd.exe	108
PID 3652 wrote to memory of 4688	3652	cmd.exe	109
PID 3652 wrote to memory of 4688	3652	cmd.exe	109
PID 4588 wrote to memory of 6044	4588	$77sd.exe	111
PID 4588 wrote to memory of 6044	4588	$77sd.exe	111
PID 4588 wrote to memory of 2200	4588	$77sd.exe	113
PID 4588 wrote to memory of 2200	4588	$77sd.exe	113
PID 4588 wrote to memory of 5632	4588	$77sd.exe	115
PID 4588 wrote to memory of 5632	4588	$77sd.exe	115
PID 4588 wrote to memory of 4972	4588	$77sd.exe	117
PID 4588 wrote to memory of 4972	4588	$77sd.exe	117
PID 4588 wrote to memory of 4524	4588	$77sd.exe	118
PID 4588 wrote to memory of 4524	4588	$77sd.exe	118

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
5468	attrib.exe
2628	attrib.exe

C:\Users\Admin\AppData\Local\Temp\04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe
"C:\Users\Admin\AppData\Local\Temp\04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5484
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\dw"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:5468
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\dw\$77sd.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2628
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEA31.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3652
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:5100
- - C:\Users\Admin\dw\$77sd.exe
    "C:\Users\Admin\dw\$77sd.exe"
    3⤵
    - Executes dropped EXE
    PID:4688

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4248

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\dw\$77sd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Users\Admin\dw\$77sd.exe
  C:\Users\Admin\dw\$77sd.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4588
- - C:\Windows\system32\schtasks.exe
    "schtasks.exe" /query /TN $77sd.exe
    3⤵
    PID:6044
- - C:\Windows\system32\schtasks.exe
    "schtasks.exe" /Create /SC ONCE /TN "$77sd.exe" /TR "C:\Users\Admin\dw\$77sd.exe \"\$77sd.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2200
- - C:\Windows\system32\schtasks.exe
    "schtasks.exe" /query /TN $77sd.exe
    3⤵
    PID:5632
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4972
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "sd_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4524

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x0fgzsxi.hab.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpEA31.tmp.bat

Filesize
136B

MD5
15474f4e1456262c03f221f7d623409f

SHA1
a249f4d38b2d9176584fba4144b9e36664b6e0ac

SHA256
e4370bc02e297415cc0cf567f393a7c16b73b4b683dcc30656a4c7a9bbfb663a

SHA512
8f57c67e60083476cbcc7a6acd3b493bb224e7c74d4343fcefcfd74871dfdf184d3815016882eb959973d5622c02ce03ded91c28c52a8d335423950365e436c1

Download Submit
C:\Users\Admin\dw\$77sd.exe

Filesize
45KB

MD5
777493fb1a1ebb63fb49111ceb84d5fe

SHA1
589b529e67ae593bde8c77c24ff6a14e72696d99

SHA256
04fd1f0141ac128574c979a234e03884b59626c30d0c771ca23badb087d4e966

SHA512
d01ef318042fa32a81ba3451bdaa97dbeffe384d3e8d0282cae52548fcb422cbbbc856e11c2e65313e5e95de2256a495961804643e770cb860fb5aba38c9e66e

Download Submit
memory/4972-15-0x000001E3A90A0000-0x000001E3A90C2000-memory.dmp

Filesize
136KB

Download
memory/5484-0-0x00007FFB997A3000-0x00007FFB997A5000-memory.dmp

Filesize
8KB

Download
memory/5484-1-0x0000000000E20000-0x0000000000E30000-memory.dmp

Filesize
64KB

Download
memory/5484-2-0x00007FFB997A0000-0x00007FFB9A261000-memory.dmp

Filesize
10.8MB

Download
memory/5484-3-0x00007FFB997A3000-0x00007FFB997A5000-memory.dmp

Filesize
8KB

Download
memory/5484-4-0x00007FFB997A0000-0x00007FFB9A261000-memory.dmp

Filesize
10.8MB

Download
memory/5484-9-0x00007FFB997A0000-0x00007FFB9A261000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads