silverrat | 425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1

General

Target

425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
Size

45KB
MD5

f2d5f9466d92077f4c6f03c89c28d504
SHA1

f25ebe46d064d711b4d66e4322ead0459f8f3bc9
SHA256

425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1
SHA512

b2cbc924cd300e2940288249387b14509966b049be4086d335176454a80912c965ad8f60b70b223cc207556bb75e90e559406a0263b221bc392714b06988ab1f
SSDEEP

768:eNV+sOzGDZutLgeZeH/3j6tDULGcbi00RUjQx9PYTh8RIB6SzxzgvrAWEsh:eNV+sAk3jeD14b0GUx95IoGxzgsWEsh

Score

10^/10

silverrat defense_evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

traffic-equipment.gl.at.ply.gg:37035

Mutex

wnykMJYHba

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/1362208671114723479/LvdkCF57ZASLhyMey8E8SalpGbpRjudiP5GtndFuJHj6Qkuha-CXPrshzVau_JY7H3k6
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
VFNiTWdsYVhhVVNtVUVHRU1KRndBWUxYWG9scEJZ
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
3184	attrib.exe
1884	attrib.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3833542908-3750648139-3436651901-1000\Control Panel\International\Geo\Nation	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.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\\Microsoft\\Windows\\Templates\\Windows Security Health Service\\$77Windows Security Health Service.cmd\""	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.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
1172	timeout.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	4552	vssvc.exe
Token: SeRestorePrivilege	4552	vssvc.exe
Token: SeAuditPrivilege	4552	vssvc.exe
Token: SeDebugPrivilege	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
Token: 33	4688	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	4688	AUDIODG.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 820 wrote to memory of 1884	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	94
PID 820 wrote to memory of 1884	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	94
PID 820 wrote to memory of 3184	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	96
PID 820 wrote to memory of 3184	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	96
PID 820 wrote to memory of 1648	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	100
PID 820 wrote to memory of 1648	820	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	100
PID 1648 wrote to memory of 1172	1648	cmd.exe	103
PID 1648 wrote to memory of 1172	1648	cmd.exe	103
PID 1648 wrote to memory of 4360	1648	cmd.exe	104
PID 1648 wrote to memory of 4360	1648	cmd.exe	104

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
1884	attrib.exe
3184	attrib.exe

C:\Users\Admin\AppData\Local\Temp\425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
"C:\Users\Admin\AppData\Local\Temp\425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:820
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1884
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3184
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpAF4B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1648
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1172
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd"
    3⤵
    PID:4360

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4552

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd"
1⤵
PID:1208

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x3bc 0x2d8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4688

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

1

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\tmpAF4B.tmp.bat

Filesize
238B

MD5
f8c0f0934a331e67f9fb7e27071591e1

SHA1
65d11437e858110d85470e708c40eb3c5ece97ad

SHA256
c5e0d413b7f4c67b8c5190511a26d5fe7bbd0f138d1bafec1310cd86a32ff49c

SHA512
e42ddfa5868b68f7b6884ee2264fdbe4d4c55444c9ad27d39fe4b1ab3eb43b5881ba4eb909d9c629c6912c36c81cc74adf326c8a76af63763fa6fe338b75fd51

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd

Filesize
45KB

MD5
f2d5f9466d92077f4c6f03c89c28d504

SHA1
f25ebe46d064d711b4d66e4322ead0459f8f3bc9

SHA256
425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1

SHA512
b2cbc924cd300e2940288249387b14509966b049be4086d335176454a80912c965ad8f60b70b223cc207556bb75e90e559406a0263b221bc392714b06988ab1f

Download Submit
memory/820-0-0x00007FFA94353000-0x00007FFA94355000-memory.dmp

Filesize
8KB

Download
memory/820-1-0x00000000007F0000-0x0000000000802000-memory.dmp

Filesize
72KB

Download
memory/820-2-0x00007FFA94350000-0x00007FFA94E11000-memory.dmp

Filesize
10.8MB

Download
memory/820-3-0x00007FFA94353000-0x00007FFA94355000-memory.dmp

Filesize
8KB

Download
memory/820-4-0x00007FFA94350000-0x00007FFA94E11000-memory.dmp

Filesize
10.8MB

Download
memory/820-9-0x00007FFA94350000-0x00007FFA94E11000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads