silverrat | 2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9

General

Target

2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
Size

43KB
MD5

ed32a7d82b35891f38691e8fa6ecaebb
SHA1

54b54c134249abea5f186032d957fbd89f59d490
SHA256

2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9
SHA512

02fbf69c4fb2651eed1d98e4097324b5b6fd7c22da7237c9452a4c08fdb5f76210536f5042dde6796f7546a829f8ff9508172d80ce3088307d19cf768f515cce
SSDEEP

768:Z7HrVRjdqtYW/WLf1jdKEMqrA2sSauhRUT/m9wXLYB6S08UUvNVrgE:ZFWzqrAFpGGq92Yoz8UUFVcE

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

lists-mba.gl.at.ply.gg:34281

Mutex

SilverMutex_fErYmBRYzo

Attributes

certificate
MIIE4DCCAsigAwIBAgIQAKQYOfZd86J2BfNjhG4CWTANBgkqhkiG9w0BAQ0FADARMQ8wDQYDVQQDDAZTaWx2ZXIwIBcNMjIwODI2MTkwMTA4WhgPOTk5OTEyMzEyMzU5NTlaMBExDzANBgNVBAMMBlNpbHZlcjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAPbpOWfhZTuOfEaqqImTTe5dNHAAry7/mf00DCoI4lPZfypsc1tYraxSPFeayGu09a3qdhkWKSVIgwnu2n4GLQNOCY9fh/1oyrX4Iir3BIkYeU7pKTWgjhUlAmFAUAaNr0ca23Ku2kN79jrDzRznOgE2DEW4p7OiM4Mb097ma9lzu7MyssHbY4VCteAhj9HZiplqBxaC1vXDmzxqG+gUZ1aLcyG7ssdkOjtWVBgT3gD/gOl7KchRzCFB1egDC/vD9WZCG35U3Ngi+IkTznoXR1R06cq4v0UnGjE37R2vcB21qb0ZYNiZJXZHv5i9+R7xoPeNoLda5PqnfGGbhPvNEdD56mdcOKlzGIuyemLkUo8texdpiBWKbtc3JZf5VsKxjJtHDK3xW6gDGI+PAirzGkFPmwcf8WgsblvzLg8OZpVxVs8rmKWoi6qIrf4CXnyl73J4lgzW+ir7PjANAQXwLNGdNnvdMeLeo/muGQPdeNpr6OczGGnkWA4qniHeL51/Gx0a8A+jP9zKiyu+qHcsP2IotgWDH/KlzJVr7IAum+DV92uV8poTDcUNcHaKvhHA65KmEtsvLbK6lFZcAMC0eWC0VgpW44T1/16rOaaky5mP6rTMc3nSyOl/lU/XgAgGGQPe22bRLWYzd3WVeEpI1WnHYXS+tL9IOe4kJP+pYsWDAgMBAAGjMjAwMB0GA1UdDgQWBBR32TJj2LeUx9L+RcSOvmFV6VJq6TAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBDQUAA4ICAQA+qucSOi7ov7Q1FmAjMf925KuvKuCNwJiu3Sqo3FDGVAD1fAwAi2FdyuXEO2VIUPZCkalFcBna5rqyrc6tcS4T0IL2TsYLrsuGir7PWP7CAcft1urYS1HpNpHxeH/nixwnQaQs/MuRmdm2TeCj6G21P5BTW55U5y9sMPSYwhbD2N7XLgnSQd5Y+80TR7FUiye/k3D37fI9PRhSQGbfYFRQQTmxj84dPTnY5CVgaY9d8fNiFZkyjaZdf+mibK0xQTf+xLVVj+toDNCkc1F462TdmFhCrHd4PoMo0yLDNv4SC6NLRq4haWDRtORw6gd5GYIoCQ3m3oQvNlNxXhhIjsOyxkxOrkCD0c+57PIc7EmKXieJa/XxnkcIVxO8dvTY/vijuz/VaZYl/lPu9ckuqgJ1wRvvsHl70Trv4Mn4X5uCIqRFFlK/mSOZbLIguGkDN3QIZABvej89vlZMhrVfZOG2oawe23FskHjv7thF/WzOXtWw6RUVC1V+hCwbuxFNUjZmmOTUwdXHnus7I2AuiG6Jz1+y9aYiXBcVTdSljxjHRRmiRaAnY94h58vN8NJ4hKL2GVCo6LxkpuplmcntJN0cKraKTPxSXcCRrqWxX9qoIbfvBcUU4vH1jPJCCLNCuDyD3lgQkpPVvq0EMU1a2HFGgMEQMjpYpb38rcadDhT5ag==
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1240368289755172974/pNWyW3BzPxdpeOXdB6tP4ABWWxDfOhsC07vYyMyWkduqpR5HEIOarL4dukoP8PDEsAix
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
MTIz
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
3580	attrib.exe
4768	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-1-5-21-3446877943-4095308722-756223633-1000\Control Panel\International\Geo\Nation	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3446877943-4095308722-756223633-1000\Control Panel\International\Geo\Nation	$77svchost.exe.exe

Executes dropped EXE 1 IoCs

pid	Process
3608	$77svchost.exe.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\\appdata\\$77svchost.exe.exe\""	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3192	powershell.exe

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

Web Service

T1102

flow	ioc
36	discord.com
37	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

defense_evasion

pid	Process
1408	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
5600	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
3192	powershell.exe
3192	powershell.exe
3608	$77svchost.exe.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
Token: SeDebugPrivilege	3608	$77svchost.exe.exe
Token: SeDebugPrivilege	3192	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3608	$77svchost.exe.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5264 wrote to memory of 4768	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe	95
PID 5264 wrote to memory of 4768	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe	95
PID 5264 wrote to memory of 3580	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe	97
PID 5264 wrote to memory of 3580	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe	97
PID 5264 wrote to memory of 5368	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe	104
PID 5264 wrote to memory of 5368	5264	2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe	104
PID 5368 wrote to memory of 1408	5368	cmd.exe	106
PID 5368 wrote to memory of 1408	5368	cmd.exe	106
PID 5368 wrote to memory of 3608	5368	cmd.exe	107
PID 5368 wrote to memory of 3608	5368	cmd.exe	107
PID 3608 wrote to memory of 2400	3608	$77svchost.exe.exe	108
PID 3608 wrote to memory of 2400	3608	$77svchost.exe.exe	108
PID 3608 wrote to memory of 5600	3608	$77svchost.exe.exe	110
PID 3608 wrote to memory of 5600	3608	$77svchost.exe.exe	110
PID 3608 wrote to memory of 1412	3608	$77svchost.exe.exe	112
PID 3608 wrote to memory of 1412	3608	$77svchost.exe.exe	112
PID 3608 wrote to memory of 3192	3608	$77svchost.exe.exe	114
PID 3608 wrote to memory of 3192	3608	$77svchost.exe.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

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
4768	attrib.exe
3580	attrib.exe

C:\Users\Admin\AppData\Local\Temp\2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe
"C:\Users\Admin\AppData\Local\Temp\2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5264
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\appdata"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4768
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\appdata\$77svchost.exe.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3580
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE55F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5368
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1408
- - C:\Users\Admin\AppData\Roaming\appdata\$77svchost.exe.exe
    "C:\Users\Admin\AppData\Roaming\appdata\$77svchost.exe.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:3608
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77svchost.exe.exe
      4⤵
      PID:2400
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77svchost.exe.exe" /TR "C:\Users\Admin\AppData\Roaming\appdata\$77svchost.exe.exe \"\$77svchost.exe.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:5600
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77svchost.exe.exe
      4⤵
      PID:1412
  - - 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:3192

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pvlaeopc.axc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE55F.tmp.bat

Filesize
166B

MD5
ef0ee11b6efbeb588ea89892426def4a

SHA1
2639cb37d11828eea8dfda4e185e74abbb1b8eae

SHA256
a63d3c2ea2e13d9791e85608a32e7016879a1d0b60beacf2b9c9609d01fc01be

SHA512
5b916860f76b47d08684b2115c7db8fb112a55a40d049638088e1a8d347f0f6000f0ae5f2067a68f65451948773c42274c13e01b998a477c3f44d41b47e1b94e

Download Submit
C:\Users\Admin\AppData\Roaming\appdata\$77svchost.exe.exe

Filesize
43KB

MD5
ed32a7d82b35891f38691e8fa6ecaebb

SHA1
54b54c134249abea5f186032d957fbd89f59d490

SHA256
2aab256875748e3e205a6180a3edc476853c6056e62bad7031bf96b351140fd9

SHA512
02fbf69c4fb2651eed1d98e4097324b5b6fd7c22da7237c9452a4c08fdb5f76210536f5042dde6796f7546a829f8ff9508172d80ce3088307d19cf768f515cce

Download Submit
memory/3192-21-0x000001F61FB00000-0x000001F61FB22000-memory.dmp

Filesize
136KB

Download
memory/3608-11-0x00007FFB4BF20000-0x00007FFB4C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/3608-24-0x00007FFB4BF20000-0x00007FFB4C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/5264-0-0x00007FFB4BF23000-0x00007FFB4BF25000-memory.dmp

Filesize
8KB

Download
memory/5264-1-0x0000000000FE0000-0x0000000000FF0000-memory.dmp

Filesize
64KB

Download
memory/5264-2-0x00007FFB4BF20000-0x00007FFB4C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/5264-4-0x00007FFB4BF20000-0x00007FFB4C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/5264-9-0x00007FFB4BF20000-0x00007FFB4C9E1000-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