silverrat | 32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d

General

Target

32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
Size

43KB
MD5

f8c2396649f5f0f8218c196fc124c812
SHA1

7260118bbc05571764778bb8d3b822266129e341
SHA256

32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d
SHA512

b0def3aa05b44de8725050d04ff9ca819aabee0208ca3a4b4785f9e516ac8f519cc21a410eb7730e24ff1ad417feac9be7d01945e3b009f74453627da432890f
SSDEEP

768:XC2Aanfbl+pjJioUmdGP3Z56P6RUkq9XpJz1QB6Sd12OvTnI5Gi:Xdnfx+pjYPZgCGkq9n1QousObnI0i

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

second-trap.gl.at.ply.gg:63877

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1353847374845317130/hhejEfgnzhFzjjLVt0pwxjVIRFLoHM1GhiYovg1u1EG4R-VsMUoWDsxVlNEjKru71Ggz
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
payload_url
https://g.top4top.io/p_2522c7w8u1.png
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
5100	attrib.exe
6032	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-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	Service Host.exe

Executes dropped EXE 1 IoCs

pid	Process
1120	Service Host.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\\service\\Service Host.exe\""	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1332	powershell.exe

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

Web Service

T1102

flow	ioc
39	discord.com
40	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
1548	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
1940	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
1332	powershell.exe
1332	powershell.exe
1120	Service Host.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
Token: SeDebugPrivilege	1120	Service Host.exe
Token: SeDebugPrivilege	1332	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1120	Service Host.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 5528 wrote to memory of 5100	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe	91
PID 5528 wrote to memory of 5100	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe	91
PID 5528 wrote to memory of 6032	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe	93
PID 5528 wrote to memory of 6032	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe	93
PID 5528 wrote to memory of 2040	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe	103
PID 5528 wrote to memory of 2040	5528	32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe	103
PID 2040 wrote to memory of 1548	2040	cmd.exe	105
PID 2040 wrote to memory of 1548	2040	cmd.exe	105
PID 2040 wrote to memory of 1120	2040	cmd.exe	106
PID 2040 wrote to memory of 1120	2040	cmd.exe	106
PID 1120 wrote to memory of 5800	1120	Service Host.exe	107
PID 1120 wrote to memory of 5800	1120	Service Host.exe	107
PID 1120 wrote to memory of 1940	1120	Service Host.exe	109
PID 1120 wrote to memory of 1940	1120	Service Host.exe	109
PID 1120 wrote to memory of 5672	1120	Service Host.exe	111
PID 1120 wrote to memory of 5672	1120	Service Host.exe	111
PID 1120 wrote to memory of 1332	1120	Service Host.exe	113
PID 1120 wrote to memory of 1332	1120	Service Host.exe	113

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
5100	attrib.exe
6032	attrib.exe

C:\Users\Admin\AppData\Local\Temp\32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe
"C:\Users\Admin\AppData\Local\Temp\32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5528
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\service"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:5100
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\service\Service Host.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:6032
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEA8F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2040
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1548
- - C:\Users\Admin\service\Service Host.exe
    "C:\Users\Admin\service\Service Host.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:1120
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN Service Host.exe
      4⤵
      PID:5800
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "Service Host.exe" /TR "C:\Users\Admin\service\Service Host.exe \"\Service Host.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1940
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN Service Host.exe
      4⤵
      PID:5672
  - - 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:1332

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mnmajvct.wue.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpEA8F.tmp.bat

Filesize
148B

MD5
bf5b3b2e806bae4d33aea0e906eb9995

SHA1
78cb86f1026306039c411e7cb89c70269bb82e28

SHA256
cb487537dd35e7dae5312b38243187e55843bf7e9ee95f254406afa68f235874

SHA512
455cf814f026d369a3031f61576ed2dbc3d9c2b40673d0ed96d618e5e7a3085919404476aeed58fb29935cf4e507a16d78bbac1238bfda47c89d85d803dcc6b8

Download Submit
C:\Users\Admin\service\Service Host.exe

Filesize
43KB

MD5
f8c2396649f5f0f8218c196fc124c812

SHA1
7260118bbc05571764778bb8d3b822266129e341

SHA256
32abf0a215af4198e9c1bad2c9ec0e095c8b6fc83d4b276b0ce03806ced0e64d

SHA512
b0def3aa05b44de8725050d04ff9ca819aabee0208ca3a4b4785f9e516ac8f519cc21a410eb7730e24ff1ad417feac9be7d01945e3b009f74453627da432890f

Download Submit
memory/1120-13-0x00007FFF5F820000-0x00007FFF602E1000-memory.dmp

Filesize
10.8MB

Download
memory/1120-26-0x00007FFF5F820000-0x00007FFF602E1000-memory.dmp

Filesize
10.8MB

Download
memory/1332-23-0x0000017733CB0000-0x0000017733CD2000-memory.dmp

Filesize
136KB

Download
memory/5528-1-0x0000000000E10000-0x0000000000E20000-memory.dmp

Filesize
64KB

Download
memory/5528-0-0x00007FFF5F823000-0x00007FFF5F825000-memory.dmp

Filesize
8KB

Download
memory/5528-2-0x00007FFF5F820000-0x00007FFF602E1000-memory.dmp

Filesize
10.8MB

Download
memory/5528-3-0x00007FFF5F820000-0x00007FFF602E1000-memory.dmp

Filesize
10.8MB

Download
memory/5528-9-0x00007FFF5F820000-0x00007FFF602E1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads