silverrat | b0c60f1512bb002f4f782c9fda6c42dded1e5f04c467d1b526205a96d602fb9f

General

Target

b27e2b819bc3acacc888e9e2c9481a14.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
5572	powershell.exe
5048	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
4816	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 5 IoCs

pid	Process
5572	powershell.exe
5572	powershell.exe
5048	powershell.exe
5048	powershell.exe
4816	T_T.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	6028	b27e2b819bc3acacc888e9e2c9481a14.exe
Token: SeDebugPrivilege	5572	powershell.exe
Token: SeDebugPrivilege	5048	powershell.exe
Token: SeDebugPrivilege	4816	T_T.exe
Token: SeDebugPrivilege	4816	T_T.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4816	T_T.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 6028 wrote to memory of 5572	6028	b27e2b819bc3acacc888e9e2c9481a14.exe	80
PID 6028 wrote to memory of 5572	6028	b27e2b819bc3acacc888e9e2c9481a14.exe	80
PID 6028 wrote to memory of 5048	6028	b27e2b819bc3acacc888e9e2c9481a14.exe	83
PID 6028 wrote to memory of 5048	6028	b27e2b819bc3acacc888e9e2c9481a14.exe	83

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\b27e2b819bc3acacc888e9e2c9481a14.exe
"C:\Users\Admin\AppData\Local\Temp\b27e2b819bc3acacc888e9e2c9481a14.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:6028
- 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:5572
- 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:5048

C:\ProgramData\T_T.exe
C:\ProgramData\T_T.exe
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4816

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

Replay Monitor

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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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
05b3cd21c1ec02f04caba773186ee8d0

SHA1
39e790bfe10abf55b74dfb3603df8fcf6b5e6edb

SHA256
911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8

SHA512
e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_anmtygqz.1fu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4816-35-0x0000000002C90000-0x0000000002C9E000-memory.dmp

Filesize
56KB

Download
memory/5572-11-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download
memory/5572-12-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download
memory/5572-13-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download
memory/5572-14-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download
memory/5572-17-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download
memory/5572-7-0x000001DCB6970000-0x000001DCB6992000-memory.dmp

Filesize
136KB

Download
memory/6028-0-0x00007FF9E7B13000-0x00007FF9E7B15000-memory.dmp

Filesize
8KB

Download
memory/6028-31-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download
memory/6028-1-0x0000000000430000-0x0000000000470000-memory.dmp

Filesize
256KB

Download
memory/6028-36-0x00007FF9E7B10000-0x00007FF9E85D2000-memory.dmp

Filesize
10.8MB

Download

Analysis

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