silverrat | d4150267caf26aadec004b322be81e568d4e6c1793a5a490eee82326c20ca5fe

General

Target

Rat.exe
Size

46KB
MD5

87c5cb6446b50bffabd5d4f45b823ae2
SHA1

967f577daf5906008e4d2a511306d9d0ebc8f9c5
SHA256

d4150267caf26aadec004b322be81e568d4e6c1793a5a490eee82326c20ca5fe
SHA512

691bd612a79ac1e65c5ca8d4e5448b9438115de30875db0e980dba647ff67936c56df28ebc361139aa376eecfacfe1badbe08389aae874aeab6f77037d66208f
SSDEEP

768:A0Mk3L5X0UC22ynqUS08+PRULQcY9hzyxJjB6S2N3Svrm/wy:A0M/mycGsD98bohN3Sa/wy

Score

10^/10

silverrat defense_evasion discovery persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

AERD-47210.portmap.host:47210

Mutex

SilverMutex_mCvmEafTxB

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1339299451642314845/g1Gv5jULSz8Pebm4NzbJROiNI4YMerdc5dgzha88cgyOa16Ji2c67zQdw45RArDpsUDf
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
SFloWnRSeGdTU1NRTFBBYWREQ0NCRldsRnN1SllL
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

Downloads MZ/PE file 1 IoCs

flow	pid	Process
44	2796	Process not Found

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
3240	attrib.exe
4976	attrib.exe

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-1-5-21-2508704002-2325818048-3575902788-1000\Control Panel\International\Geo\Nation	Rat.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\\zt-WD\\$77Windows Security Process.cmd\""	Rat.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4844	MicrosoftEdgeUpdate.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3952	timeout.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe
1528	Rat.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	2532	vssvc.exe
Token: SeRestorePrivilege	2532	vssvc.exe
Token: SeAuditPrivilege	2532	vssvc.exe
Token: SeDebugPrivilege	1528	Rat.exe
Token: 33	1196	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1196	AUDIODG.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 3240	1528	Rat.exe	94
PID 1528 wrote to memory of 3240	1528	Rat.exe	94
PID 1528 wrote to memory of 4976	1528	Rat.exe	96
PID 1528 wrote to memory of 4976	1528	Rat.exe	96
PID 1528 wrote to memory of 2372	1528	Rat.exe	104
PID 1528 wrote to memory of 2372	1528	Rat.exe	104
PID 2372 wrote to memory of 3952	2372	cmd.exe	106
PID 2372 wrote to memory of 3952	2372	cmd.exe	106
PID 2372 wrote to memory of 668	2372	cmd.exe	107
PID 2372 wrote to memory of 668	2372	cmd.exe	107

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
3240	attrib.exe
4976	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Rat.exe
"C:\Users\Admin\AppData\Local\Temp\Rat.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\zt-WD"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3240
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.cmd"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4976
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp36BB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2372
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3952
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.cmd"
    3⤵
    PID:668

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2532

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x470 0x4c8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1196

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODMyMzYiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1NDI1MTE0ODAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1NDMzMDMxNDM4Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:4844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp36BB.tmp.bat

Filesize
177B

MD5
dcf3cb813d0b68b72b84c632524bbdbe

SHA1
5402eb2a8faefd8ec1a0cef7b7e3cb392f9a9db0

SHA256
a8a5436c1e1a72fcc4d39c300d1823c5d1c096f8994e362ad2c7c980a91f4622

SHA512
7ed1a9e4247da7503b29e16b3317a38aa11b847ee21acb17935036d6ccf141d091bbd06b2f00443de7be175d94ede492d33a4dab5b3b9757453d1965208960f2

Download Submit
C:\Users\Admin\AppData\Roaming\zt-WD\$77Windows Security Process.cmd

Filesize
46KB

MD5
87c5cb6446b50bffabd5d4f45b823ae2

SHA1
967f577daf5906008e4d2a511306d9d0ebc8f9c5

SHA256
d4150267caf26aadec004b322be81e568d4e6c1793a5a490eee82326c20ca5fe

SHA512
691bd612a79ac1e65c5ca8d4e5448b9438115de30875db0e980dba647ff67936c56df28ebc361139aa376eecfacfe1badbe08389aae874aeab6f77037d66208f

Download Submit
memory/1528-0-0x00007FFE1F2F3000-0x00007FFE1F2F5000-memory.dmp

Filesize
8KB

Download
memory/1528-1-0x0000000000B60000-0x0000000000B72000-memory.dmp

Filesize
72KB

Download
memory/1528-2-0x00007FFE1F2F0000-0x00007FFE1FDB1000-memory.dmp

Filesize
10.8MB

Download
memory/1528-3-0x00007FFE1F2F3000-0x00007FFE1F2F5000-memory.dmp

Filesize
8KB

Download
memory/1528-4-0x00007FFE1F2F0000-0x00007FFE1FDB1000-memory.dmp

Filesize
10.8MB

Download
memory/1528-10-0x00007FFE1F2F0000-0x00007FFE1FDB1000-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