silverrat | ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97

General

Target

SilverClient.exe
Size

42KB
MD5

c312ff9dfd199ae5b504932e018b4d84
SHA1

75ff47cc5fb04726d14df93b9c8804360a74f4ad
SHA256

ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97
SHA512

94a1e811451022abc9e408c5ede051d9656ce74383455b3ecb897dba9c1abf1bac21447b42ece811845271639de201d780b9aaab594615636fc59538be3684a7
SSDEEP

768:VdLkzyZYjLyb63W3DtmMfBJ/MlKYMRUA9PsMtB6SnXyvruaNE:VdLkz8bRhh7a3MGA95oQXyiaNE

Score

10^/10

silverrat execution trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

Mutex

SilverMutex_EZMDaghRAK

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1344190210203975710/llWGKbVGP8KFjTLbojySgUGmRZ-7w1XiROSsUTWS4cwLV54tR8hpAm5WBow8QrkHvn-k
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
dmthUlBIaHJSb3BpbVJEa1JUQVJtbllUWUR2TWFZ
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
3443
server_signature
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

Signatures

SilverRat
SilverRat is trojan written in C#.
trojan silverrat
Silverrat family
silverrat

Checks computer location settings 2 TTPs 1 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-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	HP_Updates.exe

Executes dropped EXE 1 IoCs

pid	Process
4032	HP_Updates.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
916	powershell.exe

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

Web Service

T1102

flow	ioc
27	discord.com
28	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
4076	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
884	schtasks.exe
1660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
1676	SilverClient.exe
916	powershell.exe
916	powershell.exe
4032	HP_Updates.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1676	SilverClient.exe
Token: SeDebugPrivilege	4032	HP_Updates.exe
Token: SeDebugPrivilege	916	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4032	HP_Updates.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2180	1676	SilverClient.exe	84
PID 1676 wrote to memory of 2180	1676	SilverClient.exe	84
PID 2180 wrote to memory of 4076	2180	cmd.exe	86
PID 2180 wrote to memory of 4076	2180	cmd.exe	86
PID 2180 wrote to memory of 4032	2180	cmd.exe	92
PID 2180 wrote to memory of 4032	2180	cmd.exe	92
PID 4032 wrote to memory of 4824	4032	HP_Updates.exe	93
PID 4032 wrote to memory of 4824	4032	HP_Updates.exe	93
PID 4032 wrote to memory of 884	4032	HP_Updates.exe	95
PID 4032 wrote to memory of 884	4032	HP_Updates.exe	95
PID 4032 wrote to memory of 1240	4032	HP_Updates.exe	97
PID 4032 wrote to memory of 1240	4032	HP_Updates.exe	97
PID 4032 wrote to memory of 916	4032	HP_Updates.exe	100
PID 4032 wrote to memory of 916	4032	HP_Updates.exe	100
PID 4032 wrote to memory of 1660	4032	HP_Updates.exe	101
PID 4032 wrote to memory of 1660	4032	HP_Updates.exe	101

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

C:\Users\Admin\AppData\Local\Temp\SilverClient.exe
"C:\Users\Admin\AppData\Local\Temp\SilverClient.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD9D5.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2180
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4076
- - C:\Users\Admin\HP_Drivers\HP_Updates.exe
    "C:\Users\Admin\HP_Drivers\HP_Updates.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:4032
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN HP_Updates.exe
      4⤵
      PID:4824
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "HP_Updates.exe" /TR "C:\Users\Admin\HP_Drivers\HP_Updates.exe \"\HP_Updates.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:884
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN HP_Updates.exe
      4⤵
      PID:1240
  - - 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:916
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "HP_Updates_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1660

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

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fzjaspll.fjl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD9D5.tmp.bat

Filesize
149B

MD5
4c23c321524a730960fc5bc95fedd7ab

SHA1
17f29313736dea43bb4086d57e64e8f5a6379d20

SHA256
34b4bad0a5ec4942bf1c50ddf59a614f9c48c816e63df3da22aa37e39b231656

SHA512
bfe8e618e75dcfe9927bea892a01c52dfcb35e96e5a7c674a6d0e5ec9db6d7e6804103610e7eda00f565046024151f50a988f4e94ac4bb56f00283c777d8b0b7

Download Submit
C:\Users\Admin\HP_Drivers\HP_Updates.exe

Filesize
42KB

MD5
c312ff9dfd199ae5b504932e018b4d84

SHA1
75ff47cc5fb04726d14df93b9c8804360a74f4ad

SHA256
ab51ee1b9d05629f8756c9d552a2e182f6273c34a9cb052e9ba5338667bc5a97

SHA512
94a1e811451022abc9e408c5ede051d9656ce74383455b3ecb897dba9c1abf1bac21447b42ece811845271639de201d780b9aaab594615636fc59538be3684a7

Download Submit
memory/916-14-0x000001A659970000-0x000001A659992000-memory.dmp

Filesize
136KB

Download
memory/1676-1-0x00007FFBEECE3000-0x00007FFBEECE5000-memory.dmp

Filesize
8KB

Download
memory/1676-0-0x00000000004D0000-0x00000000004E0000-memory.dmp

Filesize
64KB

Download
memory/1676-2-0x00007FFBEECE0000-0x00007FFBEF7A1000-memory.dmp

Filesize
10.8MB

Download
memory/1676-7-0x00007FFBEECE0000-0x00007FFBEF7A1000-memory.dmp

Filesize
10.8MB

Download
memory/4032-12-0x00007FFBEE213000-0x00007FFBEE215000-memory.dmp

Filesize
8KB

Download
memory/4032-13-0x00007FFBEE210000-0x00007FFBEECD1000-memory.dmp

Filesize
10.8MB

Download
memory/4032-26-0x00007FFBEE213000-0x00007FFBEE215000-memory.dmp

Filesize
8KB

Download
memory/4032-27-0x00007FFBEE210000-0x00007FFBEECD1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads