silverrat | 734134e80c40901117ef9f60a32a59c665b248cd1424c7ffdf5c38048fb386c0

General

Target

Zenith Paid (free)/Zenith.exe
Size

253KB
MD5

a3f5ca99bab4cd1278c4ba236e2ebdc0
SHA1

39140ab5086d55fda03bbaf10f5d21f12b8cbb65
SHA256

9489fa54b4d4b8445967acdd0c82f5bde71d5fc7176e29cba1a0e489e14e2260
SHA512

a3a608f2e51fd4065662579b6f2b20046600e90385375425de62e3436478864b6d0b81862a0172322fc8947886ac3e7358914cb9ae6ed40b22c45c2100c0e10d
SSDEEP

3072:uPmKPpGI/9d9tsOJJP3TrIp3LLffmqdWnX/7v:Z0/9dJJJ/Tr0bCiWXL

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

primary-spencer.gl.at.ply.gg:44605

Mutex

SilverMutex_THTKnubHYs

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1360028237673271410/L71d1vKuqVi0a8hRaNkZVq16u74QldOvKu2ka_rmGztXjyZ_2kCjg6qcKhW8ADujYXyZ
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
eG90dHZtYlpmaWpZd1FZQ2l3b2N4TURvUWZSYkxS
payload_url
https://g.top4top.io/p_2522c7w8u1.png
reconnect_delay
4
server_signature
PwsFwyulCMo6APH+AHSxvFJ5Sh1NCPDclAC0Rad1OYF1TVa6KVvqaOPlEYIR2tcrD0uLpS3MYaA+J/JrgifE4UvnMghukhnlrrNe6LK4S6PYn3T+ysqaJE8OWIAtSMipFU6SIYVOGBqpZb2JEvjNk3c0n358BbxsroFUGY0k5PtWap2ymVwA0MSYcZujbe0FNZ/BHcKzjGiv+9Yb1m0KZJQ6JU8E9eBlVeJSLOMluNvRNerLrrfG/ft62MFDVlCgeKLY9ISd7cE2Z6eTzgmG/oMfkTrdvzvFJQ4frklKfdA+/TrNa1PK2n7txPzA130BAOCY/lmeEKTfYC7COtfsTYGXHcR7eXivgeZIhq4hoQnNgbdV9JP1d+mYaFKLqAX/JkP+wgXcEHTUTkyfnUXp3nzGMHxK+/dD3938GBulI0+JKJaq1ryX+lIg+Khh2WfBm7IQ5kYt1C7A6j7/FNY8aLcTM+1XEKGOq9I+eUSCAFPKkd9Or8HMU4Q3rtvyaqaSPTJHVEtBNUtFDUi6bbCUm/JneGvaKjrngZ1Wg0mx3JfVv144FOmoYrHZ/IhnWWthuZ6lE5UoYn2SRwg8o4WhNNX784I5I8MqfYuUD5tbh2TUd1xlXdPs4EQAZJVMCqMQkajQFyhdNGmR/u3RdnUpXi2V3qBUlVqteTpzms0A7VA=

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
3040	attrib.exe
2008	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-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	Zenith.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3027557611-1484967174-339164627-1000\Control Panel\International\Geo\Nation	$77runtimebroker.exe.exe

Executes dropped EXE 2 IoCs

pid	Process
5968	$77runtimebroker.exe.exe
5008	$77runtimebroker.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\\wininit.exe\\$77runtimebroker.exe.exe\""	Zenith.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4960	powershell.exe

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

Web Service

T1102

flow	ioc
1	discord.com
2	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
3552	timeout.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
2516	Zenith.exe
4960	powershell.exe
4960	powershell.exe
5968	$77runtimebroker.exe.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	Zenith.exe
Token: SeDebugPrivilege	5968	$77runtimebroker.exe.exe
Token: SeDebugPrivilege	4960	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5968	$77runtimebroker.exe.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 3040	2516	Zenith.exe	82
PID 2516 wrote to memory of 3040	2516	Zenith.exe	82
PID 2516 wrote to memory of 2008	2516	Zenith.exe	84
PID 2516 wrote to memory of 2008	2516	Zenith.exe	84
PID 2516 wrote to memory of 5712	2516	Zenith.exe	86
PID 2516 wrote to memory of 5712	2516	Zenith.exe	86
PID 5712 wrote to memory of 3552	5712	cmd.exe	90
PID 5712 wrote to memory of 3552	5712	cmd.exe	90
PID 5076 wrote to memory of 5968	5076	cmd.exe	91
PID 5076 wrote to memory of 5968	5076	cmd.exe	91
PID 5968 wrote to memory of 4960	5968	$77runtimebroker.exe.exe	92
PID 5968 wrote to memory of 4960	5968	$77runtimebroker.exe.exe	92
PID 5712 wrote to memory of 5008	5712	cmd.exe	97
PID 5712 wrote to memory of 5008	5712	cmd.exe	97

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
3040	attrib.exe
2008	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Zenith Paid (free)\Zenith.exe
"C:\Users\Admin\AppData\Local\Temp\Zenith Paid (free)\Zenith.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2516
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\wininit.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3040
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2008
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD9A7.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5712
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3552
- - C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe
    "C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe"
    3⤵
    - Executes dropped EXE
    PID:5008

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5076
- C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe
  C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5968
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,bat,dll,ps1;exit
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4960

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

1

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_hld4r5me.jcw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpD9A7.tmp.bat

Filesize
160B

MD5
6eb3f9ef6ebbc92fcb2ecfe9b1a0e3fa

SHA1
ddab5d8973da4771100b5d021c684f889f520b1f

SHA256
6bcbf9760ca46fc1a342abf655ad7348408899980098a514206b7e5247eade9b

SHA512
213021b4925dbb783f9f664a9de0953a34ac775aff16501eb195008c881b35b422b5236c7b63e9b9635e6f34e110038036d2cb4f4301528b014d37bac06a51dc

Download Submit
C:\Users\Admin\wininit.exe\$77runtimebroker.exe.exe

Filesize
253KB

MD5
a3f5ca99bab4cd1278c4ba236e2ebdc0

SHA1
39140ab5086d55fda03bbaf10f5d21f12b8cbb65

SHA256
9489fa54b4d4b8445967acdd0c82f5bde71d5fc7176e29cba1a0e489e14e2260

SHA512
a3a608f2e51fd4065662579b6f2b20046600e90385375425de62e3436478864b6d0b81862a0172322fc8947886ac3e7358914cb9ae6ed40b22c45c2100c0e10d

Download Submit
memory/2516-0-0x00007FFE6A663000-0x00007FFE6A665000-memory.dmp

Filesize
8KB

Download
memory/2516-1-0x0000000000490000-0x00000000004D4000-memory.dmp

Filesize
272KB

Download
memory/2516-2-0x00007FFE6A660000-0x00007FFE6B121000-memory.dmp

Filesize
10.8MB

Download
memory/2516-3-0x00007FFE6A663000-0x00007FFE6A665000-memory.dmp

Filesize
8KB

Download
memory/2516-4-0x00007FFE6A660000-0x00007FFE6B121000-memory.dmp

Filesize
10.8MB

Download
memory/2516-9-0x00007FFE6A660000-0x00007FFE6B121000-memory.dmp

Filesize
10.8MB

Download
memory/4960-23-0x000002EE07E80000-0x000002EE07EA2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads