silverrat | b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f

General

Target

b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe
Size

227KB
MD5

3ebfd2e63dbdb727badcaee9f86c52bb
SHA1

006c520203e7610d9fed7874c803286c3b81402f
SHA256

b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f
SHA512

483eb63069156a2c5eb004a9602c9a7aa4d99ba714e5f7a7787d8af401ee5bbc5a30deb90196953a61fd61cb50584f8f9b590a9c91364bba6688248c30ca013f
SSDEEP

3072:Emooj7nGTEA3uUq4uEHBAnpK37nX78c0BgHQ7Unpr74tyJhd6KtAn6m7TcSs2oWh:tHGvb8RUp1v+P7ts2oWP

Score

10^/10

silverrat execution trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

hai1723.duckdns.org:7560

Mutex

SilverMutex_NACcsErPbz

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
T293bGdva2RNV1NSTkplemxKVmdNRERIZnBSdW55
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
1
server_signature
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

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2836	powershell.exe
2660	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
1696	T_T.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2836	powershell.exe
2660	powershell.exe
1696	T_T.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	1696	T_T.exe
Token: SeDebugPrivilege	1696	T_T.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1696	T_T.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2836	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe	30
PID 2776 wrote to memory of 2836	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe	30
PID 2776 wrote to memory of 2836	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe	30
PID 2776 wrote to memory of 2660	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe	32
PID 2776 wrote to memory of 2660	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe	32
PID 2776 wrote to memory of 2660	2776	b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe	32
PID 2688 wrote to memory of 1696	2688	taskeng.exe	35
PID 2688 wrote to memory of 1696	2688	taskeng.exe	35
PID 2688 wrote to memory of 1696	2688	taskeng.exe	35

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

C:\Users\Admin\AppData\Local\Temp\b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe
"C:\Users\Admin\AppData\Local\Temp\b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2776
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\T_T.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'T_T.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660

C:\Windows\system32\taskeng.exe
taskeng.exe {B9465101-993F-43F4-9330-256EB9146F65} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2688
- C:\ProgramData\T_T.exe
  C:\ProgramData\T_T.exe
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\T_T.exe

Filesize
227KB

MD5
3ebfd2e63dbdb727badcaee9f86c52bb

SHA1
006c520203e7610d9fed7874c803286c3b81402f

SHA256
b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f

SHA512
483eb63069156a2c5eb004a9602c9a7aa4d99ba714e5f7a7787d8af401ee5bbc5a30deb90196953a61fd61cb50584f8f9b590a9c91364bba6688248c30ca013f

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
98e496be4301ba10768fdb6d3df7f5a0

SHA1
9c666e5ad4b41e077e23c3d58e70d787aad579bd

SHA256
8e5da7c6a087761dbb2de3d3001a3ff0e7394232c777d26a801d6a28c67e1faf

SHA512
1b0af6b6e5f629bfa1f34a3d67fcfdd5e9bf6e09739ed1288f321f4ca2edae85cb1b964f7f3f607b73b0f25da0535b2d9096e6e8b841db296bc6482ff1ba25c7

Download Submit
memory/1696-24-0x00000000002F0000-0x00000000002FE000-memory.dmp

Filesize
56KB

Download
memory/1696-23-0x0000000000F50000-0x0000000000F90000-memory.dmp

Filesize
256KB

Download
memory/2660-14-0x000000001B3C0000-0x000000001B6A2000-memory.dmp

Filesize
2.9MB

Download
memory/2660-15-0x0000000001EB0000-0x0000000001EB8000-memory.dmp

Filesize
32KB

Download
memory/2776-19-0x000000001AE50000-0x000000001AED0000-memory.dmp

Filesize
512KB

Download
memory/2776-18-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2776-0-0x000007FEF6503000-0x000007FEF6504000-memory.dmp

Filesize
4KB

Download
memory/2776-1-0x0000000000270000-0x00000000002B0000-memory.dmp

Filesize
256KB

Download
memory/2836-8-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/2836-7-0x000000001B1E0000-0x000000001B4C2000-memory.dmp

Filesize
2.9MB

Download
memory/2836-6-0x0000000002890000-0x0000000002910000-memory.dmp

Filesize
512KB

Download

Analysis

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