silverrat | 560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5

General

Target

560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
Size

45KB
MD5

d3ccb3a1ecb388c950062855a916c827
SHA1

f5d5ec3f4877819d41a2de66748d24347a00d1a1
SHA256

560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5
SHA512

0d67ad4f46ece4cdb2273255f4d614bcce89ca3758c96bd45c2a1d34fdd04c8214d0c3a97e79fa3acc47571af53fab7036789eaab563fbb3216896e53cffb9af
SSDEEP

768:X6sg/BD9qVKOXnXhEk75rrmt1E+cXjA7RULQv9S8Q9hD1B6SEJvrl/xU:X6sgJD9q8U5rCwjA7Gsv9eF1oVJ5/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
4684	attrib.exe
4696	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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
Key value queried	\REGISTRY\USER\S-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	$77sd.exe

Executes dropped EXE 2 IoCs

pid	Process
4012	$77sd.exe
2080	$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\""	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4960	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
744	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
4876	schtasks.exe
3124	schtasks.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
4960	powershell.exe
4960	powershell.exe
4960	powershell.exe
4012	$77sd.exe
4012	$77sd.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	4472	vssvc.exe
Token: SeRestorePrivilege	4472	vssvc.exe
Token: SeAuditPrivilege	4472	vssvc.exe
Token: SeDebugPrivilege	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
Token: SeDebugPrivilege	4012	$77sd.exe
Token: SeDebugPrivilege	4960	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4012	$77sd.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 764 wrote to memory of 4684	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe	98
PID 764 wrote to memory of 4684	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe	98
PID 764 wrote to memory of 4696	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe	100
PID 764 wrote to memory of 4696	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe	100
PID 764 wrote to memory of 6136	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe	105
PID 764 wrote to memory of 6136	764	560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe	105
PID 6136 wrote to memory of 744	6136	cmd.exe	109
PID 6136 wrote to memory of 744	6136	cmd.exe	109
PID 432 wrote to memory of 4012	432	cmd.exe	110
PID 432 wrote to memory of 4012	432	cmd.exe	110
PID 6136 wrote to memory of 2080	6136	cmd.exe	111
PID 6136 wrote to memory of 2080	6136	cmd.exe	111
PID 4012 wrote to memory of 3396	4012	$77sd.exe	113
PID 4012 wrote to memory of 3396	4012	$77sd.exe	113
PID 4012 wrote to memory of 4876	4012	$77sd.exe	115
PID 4012 wrote to memory of 4876	4012	$77sd.exe	115
PID 4012 wrote to memory of 1240	4012	$77sd.exe	117
PID 4012 wrote to memory of 1240	4012	$77sd.exe	117
PID 4012 wrote to memory of 4960	4012	$77sd.exe	119
PID 4012 wrote to memory of 4960	4012	$77sd.exe	119
PID 4012 wrote to memory of 3124	4012	$77sd.exe	120
PID 4012 wrote to memory of 3124	4012	$77sd.exe	120

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
4684	attrib.exe
4696	attrib.exe

C:\Users\Admin\AppData\Local\Temp\560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe
"C:\Users\Admin\AppData\Local\Temp\560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:764
- 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:4684
- 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:4696
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpADB5.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:6136
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:744
- - C:\Users\Admin\dw\$77sd.exe
    "C:\Users\Admin\dw\$77sd.exe"
    3⤵
    - Executes dropped EXE
    PID:2080

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4472

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\dw\$77sd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:432
- 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:4012
- - C:\Windows\system32\schtasks.exe
    "schtasks.exe" /query /TN $77sd.exe
    3⤵
    PID:3396
- - 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:4876
- - C:\Windows\system32\schtasks.exe
    "schtasks.exe" /query /TN $77sd.exe
    3⤵
    PID:1240
- - 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:4960
- - 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:3124

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qzyqv1md.qzd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpADB5.tmp.bat

Filesize
136B

MD5
42162945888a03a1a216e2a224d318c7

SHA1
6f9932ea97161d8e25cb1d7b8c66bf4704d7efd9

SHA256
563df46af98db72d07368196e36c3c52cdf61b56adaa7f3f791b0ebd9340674f

SHA512
d95f26529e3ba51cd8e42ab97bb770e2b9031dc71c33a25165c75b3b7f57edefaf33749ed7b76fe6e1bc948eccd2d3eaa454528518449e6f98a36c798276e673

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

Filesize
45KB

MD5
d3ccb3a1ecb388c950062855a916c827

SHA1
f5d5ec3f4877819d41a2de66748d24347a00d1a1

SHA256
560953939f22102629a3b62f3468c5a13c6c25f25b2aeabda76bd0e0cf2d73d5

SHA512
0d67ad4f46ece4cdb2273255f4d614bcce89ca3758c96bd45c2a1d34fdd04c8214d0c3a97e79fa3acc47571af53fab7036789eaab563fbb3216896e53cffb9af

Download Submit
memory/764-0-0x00007FFB47E93000-0x00007FFB47E95000-memory.dmp

Filesize
8KB

Download
memory/764-1-0x00000000009A0000-0x00000000009B0000-memory.dmp

Filesize
64KB

Download
memory/764-2-0x00007FFB47E90000-0x00007FFB48951000-memory.dmp

Filesize
10.8MB

Download
memory/764-3-0x00007FFB47E93000-0x00007FFB47E95000-memory.dmp

Filesize
8KB

Download
memory/764-4-0x000000001D3F0000-0x000000001D5FC000-memory.dmp

Filesize
2.0MB

Download
memory/764-5-0x00007FFB47E90000-0x00007FFB48951000-memory.dmp

Filesize
10.8MB

Download
memory/764-11-0x000000001D3F0000-0x000000001D5FC000-memory.dmp

Filesize
2.0MB

Download
memory/764-12-0x00007FFB47E90000-0x00007FFB48951000-memory.dmp

Filesize
10.8MB

Download
memory/4960-27-0x000001CCD0950000-0x000001CCD0972000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads