silverrat | 753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f

Analysis

max time kernel
122s
max time network
156s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-11-2024 21:28

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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

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
2880	attrib.exe
2480	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2752	$77helppanel.exe

Loads dropped DLL 1 IoCs

pid	Process
2592	cmd.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
1112	powershell.exe

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

Web Service

T1102

flow	ioc
4	discord.com
5	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
2736	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
2976	schtasks.exe
1792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
1112	powershell.exe
2752	$77helppanel.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
Token: SeDebugPrivilege	2752	$77helppanel.exe
Token: SeDebugPrivilege	1112	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2752	$77helppanel.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 2480	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	31
PID 1984 wrote to memory of 2480	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	31
PID 1984 wrote to memory of 2480	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	31
PID 1984 wrote to memory of 2880	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	33
PID 1984 wrote to memory of 2880	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	33
PID 1984 wrote to memory of 2880	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	33
PID 1984 wrote to memory of 2592	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	35
PID 1984 wrote to memory of 2592	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	35
PID 1984 wrote to memory of 2592	1984	753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe	35
PID 2592 wrote to memory of 2736	2592	cmd.exe	37
PID 2592 wrote to memory of 2736	2592	cmd.exe	37
PID 2592 wrote to memory of 2736	2592	cmd.exe	37
PID 2592 wrote to memory of 2752	2592	cmd.exe	38
PID 2592 wrote to memory of 2752	2592	cmd.exe	38
PID 2592 wrote to memory of 2752	2592	cmd.exe	38
PID 2752 wrote to memory of 2620	2752	$77helppanel.exe	39
PID 2752 wrote to memory of 2620	2752	$77helppanel.exe	39
PID 2752 wrote to memory of 2620	2752	$77helppanel.exe	39
PID 2752 wrote to memory of 2976	2752	$77helppanel.exe	41
PID 2752 wrote to memory of 2976	2752	$77helppanel.exe	41
PID 2752 wrote to memory of 2976	2752	$77helppanel.exe	41
PID 2752 wrote to memory of 2260	2752	$77helppanel.exe	43
PID 2752 wrote to memory of 2260	2752	$77helppanel.exe	43
PID 2752 wrote to memory of 2260	2752	$77helppanel.exe	43
PID 2752 wrote to memory of 1112	2752	$77helppanel.exe	45
PID 2752 wrote to memory of 1112	2752	$77helppanel.exe	45
PID 2752 wrote to memory of 1112	2752	$77helppanel.exe	45
PID 2752 wrote to memory of 1792	2752	$77helppanel.exe	47
PID 2752 wrote to memory of 1792	2752	$77helppanel.exe	47
PID 2752 wrote to memory of 1792	2752	$77helppanel.exe	47

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
2480	attrib.exe
2880	attrib.exe

C:\Users\Admin\AppData\Local\Temp\753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe
"C:\Users\Admin\AppData\Local\Temp\753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1984
- 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:2480
- 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:2880
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp471E.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2592
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2736
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\ServiceProfiles\$77helppanel.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77helppanel.exe
      4⤵
      PID:2620
  - - 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:2976
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77helppanel.exe
      4⤵
      PID:2260
  - - 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:1112
  - - 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:1792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab6D75.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp471E.tmp.bat

Filesize
200B

MD5
e6dbbf043cde098ca3785737db735392

SHA1
d3e3b7cb4e939f1b4a8bc6f31e4b92060b63f6b2

SHA256
27f5f338de78c99fb04bbe242d0ce8eae99affd8b31f30d3ff7040c7a75381e6

SHA512
dde011573a0c9003c9f93da7b57980a680ab7e8020296f1f5792bf42b0bdea77fac9d917f165b41d8447ec41000468463ac922068ace7d1aa07ac62435269ee1

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

Filesize
45KB

MD5
7be4b0b2f700401c020e936fcbb55f52

SHA1
9fdc76da221ea52120cf79b6491a55a40c019de3

SHA256
753dc24d28740f01aef352fdb7e63b77c5c2eabc1acd6ce31f35be16f0ddad7f

SHA512
30e2d2d591370a82c20f5886f7d0c799a4f11b1c9de0de0c354787afb57b4a3f7351d182334ddcd971b37f5fcec3dc262e5810eb24f3014595d9da82d4f9219d

Download Submit
memory/1112-24-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/1112-25-0x00000000005B0000-0x00000000005B8000-memory.dmp

Filesize
32KB

Download
memory/1984-0-0x000007FEF5863000-0x000007FEF5864000-memory.dmp

Filesize
4KB

Download
memory/1984-1-0x000000013F640000-0x000000013F650000-memory.dmp

Filesize
64KB

Download
memory/1984-2-0x000007FEF5860000-0x000007FEF624C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-3-0x000007FEF5863000-0x000007FEF5864000-memory.dmp

Filesize
4KB

Download
memory/1984-4-0x000007FEF5860000-0x000007FEF624C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-14-0x000007FEF5860000-0x000007FEF624C000-memory.dmp

Filesize
9.9MB

Download
memory/2752-19-0x000000013F200000-0x000000013F210000-memory.dmp

Filesize
64KB

Download