silverrat | 425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1

General

Target

425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
Size

45KB
MD5

f2d5f9466d92077f4c6f03c89c28d504
SHA1

f25ebe46d064d711b4d66e4322ead0459f8f3bc9
SHA256

425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1
SHA512

b2cbc924cd300e2940288249387b14509966b049be4086d335176454a80912c965ad8f60b70b223cc207556bb75e90e559406a0263b221bc392714b06988ab1f
SSDEEP

768:eNV+sOzGDZutLgeZeH/3j6tDULGcbi00RUjQx9PYTh8RIB6SzxzgvrAWEsh:eNV+sAk3jeD14b0GUx95IoGxzgsWEsh

Score

10^/10

silverrat defense_evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

traffic-equipment.gl.at.ply.gg:37035

Mutex

wnykMJYHba

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1362208671114723479/LvdkCF57ZASLhyMey8E8SalpGbpRjudiP5GtndFuJHj6Qkuha-CXPrshzVau_JY7H3k6
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
VFNiTWdsYVhhVVNtVUVHRU1KRndBWUxYWG9scEJZ
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
3084	attrib.exe
2948	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-1-5-21-446031748-3036493239-2009529691-1000\Control Panel\International\Geo\Nation	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.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\\Windows Security Health Service\\$77Windows Security Health Service.cmd\""	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.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
5048	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeBackupPrivilege	596	vssvc.exe
Token: SeRestorePrivilege	596	vssvc.exe
Token: SeAuditPrivilege	596	vssvc.exe
Token: SeDebugPrivilege	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
Token: 33	1132	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1132	AUDIODG.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 5324 wrote to memory of 3084	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	91
PID 5324 wrote to memory of 3084	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	91
PID 5324 wrote to memory of 2948	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	93
PID 5324 wrote to memory of 2948	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	93
PID 5324 wrote to memory of 5084	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	102
PID 5324 wrote to memory of 5084	5324	425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe	102
PID 5084 wrote to memory of 5048	5084	cmd.exe	106
PID 5084 wrote to memory of 5048	5084	cmd.exe	106
PID 5084 wrote to memory of 5116	5084	cmd.exe	107
PID 5084 wrote to memory of 5116	5084	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
3084	attrib.exe
2948	attrib.exe

C:\Users\Admin\AppData\Local\Temp\425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe
"C:\Users\Admin\AppData\Local\Temp\425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5324
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3084
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2948
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCFE3.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:5048
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd"
    3⤵
    PID:5116

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:596

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd"
1⤵
PID:2728

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x494 0x328
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1132

Network

MITRE ATT&CK Enterprise v16

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCFE3.tmp.bat

Filesize
238B

MD5
50562f842586a74490d762e511128e8c

SHA1
2925a5aab9173322d410dcbbd3d53ca54e386079

SHA256
2596730ddd0c454e7fc46eb4343365825e68c0476d9659e1b00730b8bab10ff2

SHA512
b966b7f1f7ee3108c3aadee174c9b913f3e431ddbc2b361d81237dea44c413bff2c087f020941b4be5005b3720d79cf30d9a6aecb0407f29bf97e81b5be4ba05

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\Windows Security Health Service\$77Windows Security Health Service.cmd

Filesize
45KB

MD5
f2d5f9466d92077f4c6f03c89c28d504

SHA1
f25ebe46d064d711b4d66e4322ead0459f8f3bc9

SHA256
425b543f8a9e3709dbfd9317236fcdc169c4a02af0128c285c31b7bce4fc6bb1

SHA512
b2cbc924cd300e2940288249387b14509966b049be4086d335176454a80912c965ad8f60b70b223cc207556bb75e90e559406a0263b221bc392714b06988ab1f

Download Submit
memory/5324-0-0x00007FF824D73000-0x00007FF824D75000-memory.dmp

Filesize
8KB

Download
memory/5324-1-0x0000000000560000-0x0000000000572000-memory.dmp

Filesize
72KB

Download
memory/5324-2-0x00007FF824D70000-0x00007FF825831000-memory.dmp

Filesize
10.8MB

Download
memory/5324-3-0x00007FF824D73000-0x00007FF824D75000-memory.dmp

Filesize
8KB

Download
memory/5324-4-0x00007FF824D70000-0x00007FF825831000-memory.dmp

Filesize
10.8MB

Download
memory/5324-10-0x00007FF824D70000-0x00007FF825831000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads