silverrat | b9488a2f213ea62076f92fb16ae0c037ac2fc977310af10e36919543b03c8a0d

Analysis

max time kernel
134s
max time network
144s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/03/2025, 16:23

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General

Target

0x00050000000194b4-190.exe
Size

45KB
MD5

9f86ce346644c8fd062ddcf802a3e993
SHA1

8a78d91bee298fa47a794e559b5331c2ef49c015
SHA256

b9488a2f213ea62076f92fb16ae0c037ac2fc977310af10e36919543b03c8a0d
SHA512

f598a13361b482822b1f5d6b569d9d61324ea79407a93678191e779c130b491ba2cb446ab464a5f0afc71273a9378cc3df409948141f1564fe33b07e5cd9db9e
SSDEEP

768:xPrAM+pp779X5zXyyMjtJRULQD9PBnvB6SvHvvre/bE:xPrAM+nrzXMJGsD9hosHvi/bE

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

clear-spice.gl.at.ply.gg:62042

Mutex

SilverMutex_ZtRAjMMKxS

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1335733715820609557/QV6ZUiJPFo3MXmoiKBB-WTBlkHeBiFxmRY95RN_M1sHhPMswAoo2T6AL_kHvoSoCRKE0
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
dFRzdEVvbU9ZVUR2UmVzZFlPR3V3dlRGWURZdk9S
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
2
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
2456	attrib.exe
2624	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
1220	$77bloody_was_here.exe

Loads dropped DLL 1 IoCs

pid	Process
2964	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\\sdsdasd\\$77bloody_was_here.exe\""	0x00050000000194b4-190.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2432	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

defense_evasion

pid	Process
1880	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
2068	schtasks.exe
860	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1712	0x00050000000194b4-190.exe
1712	0x00050000000194b4-190.exe
1712	0x00050000000194b4-190.exe
2432	powershell.exe
1220	$77bloody_was_here.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2784	vssvc.exe
Token: SeRestorePrivilege	2784	vssvc.exe
Token: SeAuditPrivilege	2784	vssvc.exe
Token: SeDebugPrivilege	1712	0x00050000000194b4-190.exe
Token: SeDebugPrivilege	1220	$77bloody_was_here.exe
Token: SeDebugPrivilege	2432	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1220	$77bloody_was_here.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2456	1712	0x00050000000194b4-190.exe	34
PID 1712 wrote to memory of 2456	1712	0x00050000000194b4-190.exe	34
PID 1712 wrote to memory of 2456	1712	0x00050000000194b4-190.exe	34
PID 1712 wrote to memory of 2624	1712	0x00050000000194b4-190.exe	36
PID 1712 wrote to memory of 2624	1712	0x00050000000194b4-190.exe	36
PID 1712 wrote to memory of 2624	1712	0x00050000000194b4-190.exe	36
PID 1712 wrote to memory of 2964	1712	0x00050000000194b4-190.exe	39
PID 1712 wrote to memory of 2964	1712	0x00050000000194b4-190.exe	39
PID 1712 wrote to memory of 2964	1712	0x00050000000194b4-190.exe	39
PID 2964 wrote to memory of 1880	2964	cmd.exe	41
PID 2964 wrote to memory of 1880	2964	cmd.exe	41
PID 2964 wrote to memory of 1880	2964	cmd.exe	41
PID 2964 wrote to memory of 1220	2964	cmd.exe	42
PID 2964 wrote to memory of 1220	2964	cmd.exe	42
PID 2964 wrote to memory of 1220	2964	cmd.exe	42
PID 1220 wrote to memory of 2360	1220	$77bloody_was_here.exe	44
PID 1220 wrote to memory of 2360	1220	$77bloody_was_here.exe	44
PID 1220 wrote to memory of 2360	1220	$77bloody_was_here.exe	44
PID 1220 wrote to memory of 2068	1220	$77bloody_was_here.exe	46
PID 1220 wrote to memory of 2068	1220	$77bloody_was_here.exe	46
PID 1220 wrote to memory of 2068	1220	$77bloody_was_here.exe	46
PID 1220 wrote to memory of 2400	1220	$77bloody_was_here.exe	48
PID 1220 wrote to memory of 2400	1220	$77bloody_was_here.exe	48
PID 1220 wrote to memory of 2400	1220	$77bloody_was_here.exe	48
PID 1220 wrote to memory of 2432	1220	$77bloody_was_here.exe	50
PID 1220 wrote to memory of 2432	1220	$77bloody_was_here.exe	50
PID 1220 wrote to memory of 2432	1220	$77bloody_was_here.exe	50
PID 1220 wrote to memory of 860	1220	$77bloody_was_here.exe	52
PID 1220 wrote to memory of 860	1220	$77bloody_was_here.exe	52
PID 1220 wrote to memory of 860	1220	$77bloody_was_here.exe	52

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
2456	attrib.exe
2624	attrib.exe

C:\Users\Admin\AppData\Local\Temp\0x00050000000194b4-190.exe
"C:\Users\Admin\AppData\Local\Temp\0x00050000000194b4-190.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\sdsdasd"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2456
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2624
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpFE2D.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2964
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1880
- - C:\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.exe
    "C:\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1220
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77bloody_was_here.exe
      4⤵
      PID:2360
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77bloody_was_here.exe" /TR "C:\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.exe \"\$77bloody_was_here.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2068
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN $77bloody_was_here.exe
      4⤵
      PID:2400
  - - 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:2432
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "bloody_was_here_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:860

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2784

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpFE2D.tmp.bat

Filesize
170B

MD5
9861c347b5e14de4b6a7ad0716315b8a

SHA1
bcb5e1e9d54baffd1bc168d416bd69e457d19199

SHA256
0b6517ba9d77255d7729e532d5c520591cccfefa759fac4025dc9cea882ca6a4

SHA512
4dd844b67796fa4b0d411f70428862f645a74e85183fccba52100f88294d76094f7a6ca4825b0468b2cb8e917ce6824dd10967111d9ce27484245d86fbc68cb3

Download Submit
\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.exe

Filesize
45KB

MD5
9f86ce346644c8fd062ddcf802a3e993

SHA1
8a78d91bee298fa47a794e559b5331c2ef49c015

SHA256
b9488a2f213ea62076f92fb16ae0c037ac2fc977310af10e36919543b03c8a0d

SHA512
f598a13361b482822b1f5d6b569d9d61324ea79407a93678191e779c130b491ba2cb446ab464a5f0afc71273a9378cc3df409948141f1564fe33b07e5cd9db9e

Download Submit
memory/1220-19-0x000000013F210000-0x000000013F220000-memory.dmp

Filesize
64KB

Download
memory/1712-0-0x000007FEF5F93000-0x000007FEF5F94000-memory.dmp

Filesize
4KB

Download
memory/1712-1-0x000000013F810000-0x000000013F820000-memory.dmp

Filesize
64KB

Download
memory/1712-2-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/1712-3-0x000007FEF5F93000-0x000007FEF5F94000-memory.dmp

Filesize
4KB

Download
memory/1712-4-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/1712-14-0x000007FEF5F90000-0x000007FEF697C000-memory.dmp

Filesize
9.9MB

Download
memory/2432-24-0x000000001B4D0000-0x000000001B7B2000-memory.dmp

Filesize
2.9MB

Download
memory/2432-25-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download