silverrat | d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799

General

Target

config.exe
Size

41KB
MD5

f04fdc29810e2b16364d85fdd50aa425
SHA1

eb097566fec9bd89079240fba838c4f64bbcc757
SHA256

d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799
SHA512

296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b
SSDEEP

768:QmfT4n0Xi16/0Pqq6XlEr+sukNx5y45kJYp7tDRUb0P9SSPYFz1QB6SgW21:xL4naigqolErNLxkAGIP9kB1QovW21

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
1616	attrib.exe
1040	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-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation	config.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation	$77discord.exe.exe

Executes dropped EXE 1 IoCs

pid	Process
2004	$77discord.exe.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\\discord\\$77discord.exe.exe\""	config.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4384	powershell.exe

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

Web Service

T1102

flow	ioc
17	pastebin.com
18	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
3472	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1976	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
3568	config.exe
2004	$77discord.exe.exe
4384	powershell.exe
4384	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3568	config.exe
Token: SeDebugPrivilege	2004	$77discord.exe.exe
Token: SeDebugPrivilege	4384	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2004	$77discord.exe.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3568 wrote to memory of 1616	3568	config.exe	87
PID 3568 wrote to memory of 1616	3568	config.exe	87
PID 3568 wrote to memory of 1040	3568	config.exe	89
PID 3568 wrote to memory of 1040	3568	config.exe	89
PID 3568 wrote to memory of 3424	3568	config.exe	91
PID 3568 wrote to memory of 3424	3568	config.exe	91
PID 3424 wrote to memory of 3472	3424	cmd.exe	93
PID 3424 wrote to memory of 3472	3424	cmd.exe	93
PID 3424 wrote to memory of 2004	3424	cmd.exe	94
PID 3424 wrote to memory of 2004	3424	cmd.exe	94
PID 2004 wrote to memory of 4384	2004	$77discord.exe.exe	95
PID 2004 wrote to memory of 4384	2004	$77discord.exe.exe	95
PID 2004 wrote to memory of 1976	2004	$77discord.exe.exe	96
PID 2004 wrote to memory of 1976	2004	$77discord.exe.exe	96

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
1616	attrib.exe
1040	attrib.exe

C:\Users\Admin\AppData\Local\Temp\config.exe
"C:\Users\Admin\AppData\Local\Temp\config.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3568
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\discord"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1616
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\discord\$77discord.exe.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1040
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCD62.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3424
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3472
- - C:\Users\Admin\discord\$77discord.exe.exe
    "C:\Users\Admin\discord\$77discord.exe.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:2004
  - - 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:4384
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "discord.exe_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1976

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vp4ewjhm.moa.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpCD62.tmp.bat

Filesize
150B

MD5
ba86a795aefd9fa139d96732c48ca1d6

SHA1
3444ea670694851db5b2ac139186df861178a419

SHA256
c088a02439e8e3f33123fc085cc27643e6d381111b762a31423b9dd0be1f217e

SHA512
a2b9fecf0df0b852bb77e8ba79c7b6ddfcbd7d655871d4092bbaa4c2b8a68e74b0ad5c3ace9818f585a6f53b8e010533cd2e85a304a48262615ccfa5ff148ccb

Download Submit
C:\Users\Admin\discord\$77discord.exe.exe

Filesize
41KB

MD5
f04fdc29810e2b16364d85fdd50aa425

SHA1
eb097566fec9bd89079240fba838c4f64bbcc757

SHA256
d8977b1135e6261bc2d80bf5cd5c11dcb6573b071675288444da47462eb8f799

SHA512
296de0e37e184e0d77df2d868d1dba7725013244f12e437b1d75d3427ea128ab0c5b300ef416006692ec9642f3fde9084d46744890fd595f64b8fba0c43c4b8b

Download Submit
memory/2004-14-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

Filesize
10.8MB

Download
memory/2004-27-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

Filesize
10.8MB

Download
memory/3568-0-0x00007FFD17623000-0x00007FFD17625000-memory.dmp

Filesize
8KB

Download
memory/3568-1-0x0000000000BE0000-0x0000000000BEE000-memory.dmp

Filesize
56KB

Download
memory/3568-2-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

Filesize
10.8MB

Download
memory/3568-3-0x00007FFD17623000-0x00007FFD17625000-memory.dmp

Filesize
8KB

Download
memory/3568-4-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

Filesize
10.8MB

Download
memory/3568-10-0x00007FFD17620000-0x00007FFD180E1000-memory.dmp

Filesize
10.8MB

Download
memory/4384-20-0x00000258FA3D0000-0x00000258FA3F2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads