silverrat | b9488a2f213ea62076f92fb16ae0c037ac2fc977310af10e36919543b03c8a0d

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

C2

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
2632	attrib.exe
2948	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-1-5-21-869607583-2483572573-2297019986-1000\Control Panel\International\Geo\Nation	$77bloody_was_here.exe
Key value queried	\REGISTRY\USER\S-1-5-21-869607583-2483572573-2297019986-1000\Control Panel\International\Geo\Nation	0x00050000000194b4-190.exe

Executes dropped EXE 1 IoCs

pid	Process
1776	$77bloody_was_here.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
2724	powershell.exe

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

Web Service

T1102

flow	ioc
34	discord.com
35	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
932	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
1608	schtasks.exe
2984	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
3660	0x00050000000194b4-190.exe
2724	powershell.exe
2724	powershell.exe
1776	$77bloody_was_here.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	224	vssvc.exe
Token: SeRestorePrivilege	224	vssvc.exe
Token: SeAuditPrivilege	224	vssvc.exe
Token: SeDebugPrivilege	3660	0x00050000000194b4-190.exe
Token: SeDebugPrivilege	1776	$77bloody_was_here.exe
Token: SeDebugPrivilege	2724	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1776	$77bloody_was_here.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3660 wrote to memory of 2632	3660	0x00050000000194b4-190.exe	95
PID 3660 wrote to memory of 2632	3660	0x00050000000194b4-190.exe	95
PID 3660 wrote to memory of 2948	3660	0x00050000000194b4-190.exe	97
PID 3660 wrote to memory of 2948	3660	0x00050000000194b4-190.exe	97
PID 3660 wrote to memory of 4968	3660	0x00050000000194b4-190.exe	102
PID 3660 wrote to memory of 4968	3660	0x00050000000194b4-190.exe	102
PID 4968 wrote to memory of 932	4968	cmd.exe	104
PID 4968 wrote to memory of 932	4968	cmd.exe	104
PID 4968 wrote to memory of 1776	4968	cmd.exe	105
PID 4968 wrote to memory of 1776	4968	cmd.exe	105
PID 1776 wrote to memory of 4004	1776	$77bloody_was_here.exe	107
PID 1776 wrote to memory of 4004	1776	$77bloody_was_here.exe	107
PID 1776 wrote to memory of 1608	1776	$77bloody_was_here.exe	109
PID 1776 wrote to memory of 1608	1776	$77bloody_was_here.exe	109
PID 1776 wrote to memory of 4112	1776	$77bloody_was_here.exe	113
PID 1776 wrote to memory of 4112	1776	$77bloody_was_here.exe	113
PID 1776 wrote to memory of 2724	1776	$77bloody_was_here.exe	115
PID 1776 wrote to memory of 2724	1776	$77bloody_was_here.exe	115
PID 1776 wrote to memory of 2984	1776	$77bloody_was_here.exe	116
PID 1776 wrote to memory of 2984	1776	$77bloody_was_here.exe	116

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
2632	attrib.exe
2948	attrib.exe

C:\Users\Admin\AppData\Local\Temp\0x00050000000194b4-190.exe
"C:\Users\Admin\AppData\Local\Temp\0x00050000000194b4-190.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3660
- 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:2632
- 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:2948
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE09C.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4968
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:932
- - C:\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.exe
    "C:\Users\Admin\AppData\Roaming\sdsdasd\$77bloody_was_here.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:1776
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77bloody_was_here.exe
      4⤵
      PID:4004
  - - 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:1608
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77bloody_was_here.exe
      4⤵
      PID:4112
  - - 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:2724
  - - 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:2984

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:224

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_zonybxw4.j5p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE09C.tmp.bat

Filesize
170B

MD5
04daeaf7a30ddc81d3873fb70c2e4352

SHA1
2772fb218ddc840567305d98c52b7a904d91fc84

SHA256
39087b5ccfff2c5b9c0db6d3d96facbfb1800e4455f8135c5327ac40e47f494b

SHA512
4b529368db8b72d97d1934e019d1345e128262770eaf01bf406d073c1db9ea4aae438e01f356752e12d15a28056c552d774d61565531398322952595102a7c95

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

Filesize
45KB

MD5
9f86ce346644c8fd062ddcf802a3e993

SHA1
8a78d91bee298fa47a794e559b5331c2ef49c015

SHA256
b9488a2f213ea62076f92fb16ae0c037ac2fc977310af10e36919543b03c8a0d

SHA512
f598a13361b482822b1f5d6b569d9d61324ea79407a93678191e779c130b491ba2cb446ab464a5f0afc71273a9378cc3df409948141f1564fe33b07e5cd9db9e

Download Submit
memory/2724-20-0x00000138FE770000-0x00000138FE792000-memory.dmp

Filesize
136KB

Download
memory/2724-26-0x00000138FE970000-0x00000138FEB8C000-memory.dmp

Filesize
2.1MB

Download
memory/3660-1-0x00007FFD66523000-0x00007FFD66525000-memory.dmp

Filesize
8KB

Download
memory/3660-0-0x0000000000020000-0x0000000000030000-memory.dmp

Filesize
64KB

Download
memory/3660-2-0x00007FFD66520000-0x00007FFD66FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3660-3-0x00007FFD66523000-0x00007FFD66525000-memory.dmp

Filesize
8KB

Download
memory/3660-4-0x00007FFD66520000-0x00007FFD66FE1000-memory.dmp

Filesize
10.8MB

Download
memory/3660-10-0x00007FFD66520000-0x00007FFD66FE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads