silverrat | ede4efe8923397c1a2a876da4b847f78791e76b193ab0f84aa08a91fcc76ccef

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24/02/2025, 11:48

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General

Target

config.exe
Size

41KB
MD5

eec97c1c972c1a4db59f48fe5f590187
SHA1

2e8ad75a10cac16b345f8456c6a0411feea316c5
SHA256

ede4efe8923397c1a2a876da4b847f78791e76b193ab0f84aa08a91fcc76ccef
SHA512

af5c6b9540fdd224cbd1a62051c187198d7413ee237991cbb18339cabb9c79a4c93c44419128c4748cef55fe78454132f05648b4d414900470801b6e42b671a2
SSDEEP

768:+j30TK6jslN1gMMmHoAQP+wpPaLxDiFPF7sm3PRUm9Po2bz1QB6St0dDl:+j30TKEsi6Xg+w01idFVfGm95P1Qofdx

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
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
2220	attrib.exe
2520	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2640	OFXsystemSafemode.exe

Loads dropped DLL 1 IoCs

pid	Process
2336	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\\systemSafemode\\OFXsystemSafemode.exe\""	config.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2472	powershell.exe

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

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.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
2652	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
2628	schtasks.exe
760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2248	config.exe
2248	config.exe
2248	config.exe
2640	OFXsystemSafemode.exe
2472	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2248	config.exe
Token: SeDebugPrivilege	2640	OFXsystemSafemode.exe
Token: SeDebugPrivilege	2472	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2640	OFXsystemSafemode.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2248 wrote to memory of 2220	2248	config.exe	30
PID 2248 wrote to memory of 2220	2248	config.exe	30
PID 2248 wrote to memory of 2220	2248	config.exe	30
PID 2248 wrote to memory of 2520	2248	config.exe	32
PID 2248 wrote to memory of 2520	2248	config.exe	32
PID 2248 wrote to memory of 2520	2248	config.exe	32
PID 2248 wrote to memory of 2336	2248	config.exe	35
PID 2248 wrote to memory of 2336	2248	config.exe	35
PID 2248 wrote to memory of 2336	2248	config.exe	35
PID 2336 wrote to memory of 2652	2336	cmd.exe	37
PID 2336 wrote to memory of 2652	2336	cmd.exe	37
PID 2336 wrote to memory of 2652	2336	cmd.exe	37
PID 2336 wrote to memory of 2640	2336	cmd.exe	38
PID 2336 wrote to memory of 2640	2336	cmd.exe	38
PID 2336 wrote to memory of 2640	2336	cmd.exe	38
PID 2640 wrote to memory of 2672	2640	OFXsystemSafemode.exe	39
PID 2640 wrote to memory of 2672	2640	OFXsystemSafemode.exe	39
PID 2640 wrote to memory of 2672	2640	OFXsystemSafemode.exe	39
PID 2640 wrote to memory of 2628	2640	OFXsystemSafemode.exe	41
PID 2640 wrote to memory of 2628	2640	OFXsystemSafemode.exe	41
PID 2640 wrote to memory of 2628	2640	OFXsystemSafemode.exe	41
PID 2640 wrote to memory of 2680	2640	OFXsystemSafemode.exe	43
PID 2640 wrote to memory of 2680	2640	OFXsystemSafemode.exe	43
PID 2640 wrote to memory of 2680	2640	OFXsystemSafemode.exe	43
PID 2640 wrote to memory of 2472	2640	OFXsystemSafemode.exe	45
PID 2640 wrote to memory of 2472	2640	OFXsystemSafemode.exe	45
PID 2640 wrote to memory of 2472	2640	OFXsystemSafemode.exe	45
PID 2640 wrote to memory of 760	2640	OFXsystemSafemode.exe	47
PID 2640 wrote to memory of 760	2640	OFXsystemSafemode.exe	47
PID 2640 wrote to memory of 760	2640	OFXsystemSafemode.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

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2220	attrib.exe
2520	attrib.exe

C:\Users\Admin\AppData\Local\Temp\config.exe
"C:\Users\Admin\AppData\Local\Temp\config.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2248
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\systemSafemode"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2220
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\systemSafemode\OFXsystemSafemode.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2520
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF077.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2652
- - C:\Users\Admin\systemSafemode\OFXsystemSafemode.exe
    "C:\Users\Admin\systemSafemode\OFXsystemSafemode.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2640
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN OFXsystemSafemode.exe
      4⤵
      PID:2672
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "OFXsystemSafemode.exe" /TR "C:\Users\Admin\systemSafemode\OFXsystemSafemode.exe \"\OFXsystemSafemode.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2628
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN OFXsystemSafemode.exe
      4⤵
      PID:2680
  - - 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:2472
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "OFXsystemSafemode_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:760

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\tmpF077.tmp.bat

Filesize
160B

MD5
cd1b87adbe309307a9fb11d01f251bad

SHA1
27dec4b5ab4bb60695443170e8e5937be85dcf34

SHA256
478af4ad0db1612f5c038007ea26fff679356dea14e65ce27ce0aa98dce28b21

SHA512
fc8cf8ce6acf26562ce018fa9ecb303aba8152fbe12c50637a15a27a807cdd7f78a6f1f9a44a1527e742f74b869ca495f34b650a711fdbc06a78754aea60d4b0

Download Submit
C:\Users\Admin\systemSafemode\OFXsystemSafemode.exe

Filesize
41KB

MD5
eec97c1c972c1a4db59f48fe5f590187

SHA1
2e8ad75a10cac16b345f8456c6a0411feea316c5

SHA256
ede4efe8923397c1a2a876da4b847f78791e76b193ab0f84aa08a91fcc76ccef

SHA512
af5c6b9540fdd224cbd1a62051c187198d7413ee237991cbb18339cabb9c79a4c93c44419128c4748cef55fe78454132f05648b4d414900470801b6e42b671a2

Download Submit
memory/2248-0-0x000007FEF6543000-0x000007FEF6544000-memory.dmp

Filesize
4KB

Download
memory/2248-1-0x000000013FC50000-0x000000013FC5E000-memory.dmp

Filesize
56KB

Download
memory/2248-2-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/2248-4-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/2248-13-0x000007FEF6540000-0x000007FEF6F2C000-memory.dmp

Filesize
9.9MB

Download
memory/2472-22-0x0000000001E90000-0x0000000001E98000-memory.dmp

Filesize
32KB

Download
memory/2472-21-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2640-16-0x000000013F650000-0x000000013F65E000-memory.dmp

Filesize
56KB

Download