silverrat | ae4c24828d6f26b0c5b9cc8879ce0a0d407a26c38c4a0e00cc7db8f0acbf59bd

General

Target

Furry Pon Genarator.exe
Size

43KB
MD5

fef906ce39f352f256707edbfd10c335
SHA1

3d99a71ed708eb927821fa84a47a654b7667ce97
SHA256

ae4c24828d6f26b0c5b9cc8879ce0a0d407a26c38c4a0e00cc7db8f0acbf59bd
SHA512

45a2d4bffcef113c4a27828b54167b6040628fddd9be59768cf2ffaf8a36c5516e40f4d92bda5fb6082687e00bbe5ff70c545b76c20b4f7b476c937906ec1fdf
SSDEEP

768:WZAcASe38zJ/Ol6IoZmtPHJm76JswDRULQP9POGSz1QB6SF/ly:WZAcASeuOtvhmE1DGsP9f+1Qo6/ly

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

if-eventually.gl.at.ply.gg:17094

Mutex

SilverMutex_aRRoomGgIN

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
4708	attrib.exe
4820	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-1-5-21-1279544337-3716153908-718418795-1000\Control Panel\International\Geo\Nation	$77System Runtime.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1279544337-3716153908-718418795-1000\Control Panel\International\Geo\Nation	Furry Pon Genarator.exe

Executes dropped EXE 1 IoCs

pid	Process
2924	$77System Runtime.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\\Microsoft\\Windows\\Templates\\SysWOW64\\$77System Runtime.exe\""	Furry Pon Genarator.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2388	powershell.exe

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
4356	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
3500	schtasks.exe
4904	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
5432	Furry Pon Genarator.exe
2924	$77System Runtime.exe
2388	powershell.exe
2388	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	4132	vssvc.exe
Token: SeRestorePrivilege	4132	vssvc.exe
Token: SeAuditPrivilege	4132	vssvc.exe
Token: SeDebugPrivilege	5432	Furry Pon Genarator.exe
Token: SeDebugPrivilege	2924	$77System Runtime.exe
Token: SeDebugPrivilege	2388	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2924	$77System Runtime.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 5432 wrote to memory of 4708	5432	Furry Pon Genarator.exe	93
PID 5432 wrote to memory of 4708	5432	Furry Pon Genarator.exe	93
PID 5432 wrote to memory of 4820	5432	Furry Pon Genarator.exe	95
PID 5432 wrote to memory of 4820	5432	Furry Pon Genarator.exe	95
PID 5432 wrote to memory of 4168	5432	Furry Pon Genarator.exe	99
PID 5432 wrote to memory of 4168	5432	Furry Pon Genarator.exe	99
PID 4168 wrote to memory of 4356	4168	cmd.exe	101
PID 4168 wrote to memory of 4356	4168	cmd.exe	101
PID 4168 wrote to memory of 2924	4168	cmd.exe	102
PID 4168 wrote to memory of 2924	4168	cmd.exe	102
PID 2924 wrote to memory of 2676	2924	$77System Runtime.exe	104
PID 2924 wrote to memory of 2676	2924	$77System Runtime.exe	104
PID 2924 wrote to memory of 3500	2924	$77System Runtime.exe	106
PID 2924 wrote to memory of 3500	2924	$77System Runtime.exe	106
PID 2924 wrote to memory of 6032	2924	$77System Runtime.exe	108
PID 2924 wrote to memory of 6032	2924	$77System Runtime.exe	108
PID 2924 wrote to memory of 2388	2924	$77System Runtime.exe	110
PID 2924 wrote to memory of 2388	2924	$77System Runtime.exe	110
PID 2924 wrote to memory of 4904	2924	$77System Runtime.exe	111
PID 2924 wrote to memory of 4904	2924	$77System Runtime.exe	111

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
4820	attrib.exe
4708	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Furry Pon Genarator.exe
"C:\Users\Admin\AppData\Local\Temp\Furry Pon Genarator.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5432
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysWOW64"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4708
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysWOW64\$77System Runtime.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4820
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1D09.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4168
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4356
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysWOW64\$77System Runtime.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysWOW64\$77System Runtime.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:2924
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77System Runtime.exe
      4⤵
      PID:2676
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77System Runtime.exe" /TR "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysWOW64\$77System Runtime.exe \"\$77System Runtime.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:3500
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77System Runtime.exe
      4⤵
      PID:6032
  - - 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:2388
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc hourly /mo 1 /tn "System Runtime_Task-HOURLY-01" /tr "%MyFile%" /st 00:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4904

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4132

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_onalpd2b.0kk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1D09.tmp.bat

Filesize
198B

MD5
4a10004d0648075b4ec209a760385a1f

SHA1
ba657dcdeed5a0ed7e514f3cfd547b91030d0132

SHA256
9e9f2875a76d39a0db1eefe20bef22fbcfdcdd2bd088534962a46df5d717197f

SHA512
620ae28e38f6cab207538f9e1395c7277757ad683c579778f1a28d5b2bbed3e12a73b9f4d930cc307ee4ef4a556c6b074d75be7169fec04d30e14150b074795c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\SysWOW64\$77System Runtime.exe

Filesize
43KB

MD5
fef906ce39f352f256707edbfd10c335

SHA1
3d99a71ed708eb927821fa84a47a654b7667ce97

SHA256
ae4c24828d6f26b0c5b9cc8879ce0a0d407a26c38c4a0e00cc7db8f0acbf59bd

SHA512
45a2d4bffcef113c4a27828b54167b6040628fddd9be59768cf2ffaf8a36c5516e40f4d92bda5fb6082687e00bbe5ff70c545b76c20b4f7b476c937906ec1fdf

Download Submit
memory/2388-19-0x000001E331310000-0x000001E331332000-memory.dmp

Filesize
136KB

Download
memory/5432-0-0x00007FF9A43B3000-0x00007FF9A43B5000-memory.dmp

Filesize
8KB

Download
memory/5432-1-0x0000000000100000-0x0000000000110000-memory.dmp

Filesize
64KB

Download
memory/5432-2-0x00007FF9A43B0000-0x00007FF9A4E71000-memory.dmp

Filesize
10.8MB

Download
memory/5432-3-0x00007FF9A43B3000-0x00007FF9A43B5000-memory.dmp

Filesize
8KB

Download
memory/5432-4-0x00007FF9A43B0000-0x00007FF9A4E71000-memory.dmp

Filesize
10.8MB

Download
memory/5432-10-0x00007FF9A43B0000-0x00007FF9A4E71000-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