silverrat | 753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f

General

Target

753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
Size

45KB
MD5

7be4b0b2f700401c020e936fcbb55f52
SHA1

9fdc76da221ea52120cf79b6491a55a40c019de3
SHA256

753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f
SHA512

30e2d2d591370a82c20f5886f7d0c799a4f11b1c9de0de0c354787afb57b4a3f7351d182334ddcd971b37f5fcec3dc262e5810eb24f3014595d9da82d4f9219d
SSDEEP

768:fWHoI5XPDHzT8d7tGjOr1IS72G5JBCASbBRUT0h9SGQ889LWrB6SSe7vrQ/HNHy:fW5k7tGU1vljSVGAh9189LWroFe7M/Hc

Score

10^/10

silverrat evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

109.120.138.220:9999

Mutex

SilverMutex_eFDAYafReG

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1306009594367180840/Zg6W2rH_yPNkl7Hn5Z-GWjtm8W94xN_PzceHo8g5RjjoNr4vkRdq1c70arvb91az-VPT
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
QVR3SE5ZVndSU29kUlRqb0RrYVFEenVZQ3pacUJF
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.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2912	attrib.exe
3164	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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	$77helppanel.exe

Executes dropped EXE 1 IoCs

pid	Process
2432	$77helppanel.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\\ServiceProfiles\\$77helppanel.exe\""	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1928	powershell.exe

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

Web Service

T1102

flow	ioc
19	discord.com
20	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

evasion

pid	Process
2876	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
2568	schtasks.exe
4920	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
1928	powershell.exe
1928	powershell.exe
2432	$77helppanel.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
Token: SeDebugPrivilege	2432	$77helppanel.exe
Token: SeDebugPrivilege	1928	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2432	$77helppanel.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 748 wrote to memory of 2912	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	87
PID 748 wrote to memory of 2912	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	87
PID 748 wrote to memory of 3164	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	89
PID 748 wrote to memory of 3164	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	89
PID 748 wrote to memory of 1844	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	98
PID 748 wrote to memory of 1844	748	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	98
PID 1844 wrote to memory of 2876	1844	cmd.exe	100
PID 1844 wrote to memory of 2876	1844	cmd.exe	100
PID 1844 wrote to memory of 2432	1844	cmd.exe	101
PID 1844 wrote to memory of 2432	1844	cmd.exe	101
PID 2432 wrote to memory of 4208	2432	$77helppanel.exe	102
PID 2432 wrote to memory of 4208	2432	$77helppanel.exe	102
PID 2432 wrote to memory of 2568	2432	$77helppanel.exe	104
PID 2432 wrote to memory of 2568	2432	$77helppanel.exe	104
PID 2432 wrote to memory of 1188	2432	$77helppanel.exe	106
PID 2432 wrote to memory of 1188	2432	$77helppanel.exe	106
PID 2432 wrote to memory of 1928	2432	$77helppanel.exe	108
PID 2432 wrote to memory of 1928	2432	$77helppanel.exe	108
PID 2432 wrote to memory of 4920	2432	$77helppanel.exe	109
PID 2432 wrote to memory of 4920	2432	$77helppanel.exe	109

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

evasion

Hidden Files and Directories

T1564.001

pid	Process
2912	attrib.exe
3164	attrib.exe

C:\Users\Admin\AppData\Local\Temp\753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
"C:\Users\Admin\AppData\Local\Temp\753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:748
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2912
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3164
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE697.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1844
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2876
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.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:2432
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77helppanel.exe
      4⤵
      PID:4208
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77helppanel.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe \"\$77helppanel.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2568
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77helppanel.exe
      4⤵
      PID:1188
  - - 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:1928
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "helppanel_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4920

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_kzsqzlum.42q.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE697.tmp.bat

Filesize
200B

MD5
a1c378ae5c1240d9d4b26ced4e812304

SHA1
e26abd5bf17a262b64232472155635fd65b6625e

SHA256
c7782b8157857ebb55ebb8ea2eea7966b4a7c7c0b0185fff848a1c7fd0f08d14

SHA512
4e03eb283ca0c03c45ea4017366110cdc8ed7e15d8114ce5714e9694a7ebbca7f859983c9dc672cf010d658173a1ddca52d5def60c25b39b6aab384ae31be404

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe

Filesize
45KB

MD5
7be4b0b2f700401c020e936fcbb55f52

SHA1
9fdc76da221ea52120cf79b6491a55a40c019de3

SHA256
753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f

SHA512
30e2d2d591370a82c20f5886f7d0c799a4f11b1c9de0de0c354787afb57b4a3f7351d182334ddcd971b37f5fcec3dc262e5810eb24f3014595d9da82d4f9219d

Download Submit
memory/748-0-0x00007FFB69303000-0x00007FFB69305000-memory.dmp

Filesize
8KB

Download
memory/748-1-0x0000000000120000-0x0000000000130000-memory.dmp

Filesize
64KB

Download
memory/748-2-0x00007FFB69300000-0x00007FFB69DC1000-memory.dmp

Filesize
10.8MB

Download
memory/748-3-0x00007FFB69303000-0x00007FFB69305000-memory.dmp

Filesize
8KB

Download
memory/748-4-0x00007FFB69300000-0x00007FFB69DC1000-memory.dmp

Filesize
10.8MB

Download
memory/748-10-0x00007FFB69300000-0x00007FFB69DC1000-memory.dmp

Filesize
10.8MB

Download
memory/1928-14-0x00000122C7200000-0x00000122C7222000-memory.dmp

Filesize
136KB

Download
memory/2432-28-0x00007FFB69313000-0x00007FFB69315000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads