silverrat | a197a920c0c3bf253163ffc4202aa64d5b58e6fbc57f167c352c17452a03ee66

General

Target

1gdfgdfgfgdfgd.exe
Size

44KB
MD5

f52808e0eea172b4af8d7ea850dc3cf0
SHA1

8f5f76df4251a1acfb13f0e02262f5e431287e23
SHA256

a197a920c0c3bf253163ffc4202aa64d5b58e6fbc57f167c352c17452a03ee66
SHA512

3860ba747702ed1c586ea5be1cde7bb330d58e5fe8d92a67c928f1056be1f1ec4d404ae4171e5b8a80050862d6c3f8f7dbb91d40154ee4203d5f8cc650c8bf40
SSDEEP

768:y4eBDDdyX5FgSuGHxNictMvfZRWlfiQrKZHUSrIRUT0f9SgQDHkRB6Sk3nvrv/Nb:y4esictGZU9YU0IGAf9tRoX3nb/NNJ

Score

10^/10

silverrat defense_evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

138.124.58.209:9999

Mutex

SilverMutex_eDcyniRBRE

Attributes

certificate
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
decrypted_key
-|S.S.S|-
discord
https://discord.com/api/webhooks/1331834457505796197/1zo1ndsiS3rimTRAe_9GVbszJPBU9voar-Ni-Q1SqX4udg7-NgcN-1tqPw47wPI1_Lp2
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b2RWV05OT1RUWEFQb3dReUVWdUZrdHpoQXpDS1dq
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
4064	attrib.exe
4088	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
4476	$77MsMpEng.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\\MsMpEng\\$77MsMpEng.exe.exe\""	1gdfgdfgfgdfgd.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
716	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
4792	schtasks.exe
848	schtasks.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
2948	1gdfgdfgfgdfgd.exe
4476	$77MsMpEng.exe.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	1gdfgdfgfgdfgd.exe
Token: SeDebugPrivilege	4476	$77MsMpEng.exe.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4476	$77MsMpEng.exe.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 4064	2948	1gdfgdfgfgdfgd.exe	77
PID 2948 wrote to memory of 4064	2948	1gdfgdfgfgdfgd.exe	77
PID 2948 wrote to memory of 4088	2948	1gdfgdfgfgdfgd.exe	79
PID 2948 wrote to memory of 4088	2948	1gdfgdfgfgdfgd.exe	79
PID 2948 wrote to memory of 3592	2948	1gdfgdfgfgdfgd.exe	81
PID 2948 wrote to memory of 3592	2948	1gdfgdfgfgdfgd.exe	81
PID 3592 wrote to memory of 716	3592	cmd.exe	83
PID 3592 wrote to memory of 716	3592	cmd.exe	83
PID 3592 wrote to memory of 4476	3592	cmd.exe	84
PID 3592 wrote to memory of 4476	3592	cmd.exe	84
PID 4476 wrote to memory of 3744	4476	$77MsMpEng.exe.exe	85
PID 4476 wrote to memory of 3744	4476	$77MsMpEng.exe.exe	85
PID 4476 wrote to memory of 4792	4476	$77MsMpEng.exe.exe	87
PID 4476 wrote to memory of 4792	4476	$77MsMpEng.exe.exe	87
PID 4476 wrote to memory of 4692	4476	$77MsMpEng.exe.exe	89
PID 4476 wrote to memory of 4692	4476	$77MsMpEng.exe.exe	89
PID 4476 wrote to memory of 848	4476	$77MsMpEng.exe.exe	91
PID 4476 wrote to memory of 848	4476	$77MsMpEng.exe.exe	91

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
4064	attrib.exe
4088	attrib.exe

C:\Users\Admin\AppData\Local\Temp\1gdfgdfgfgdfgd.exe
"C:\Users\Admin\AppData\Local\Temp\1gdfgdfgfgdfgd.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\MsMpEng"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4064
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\MsMpEng\$77MsMpEng.exe.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:4088
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1373.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3592
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:716
- - C:\Users\Admin\MsMpEng\$77MsMpEng.exe.exe
    "C:\Users\Admin\MsMpEng\$77MsMpEng.exe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4476
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77MsMpEng.exe.exe
      4⤵
      PID:3744
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "$77MsMpEng.exe.exe" /TR "C:\Users\Admin\MsMpEng\$77MsMpEng.exe.exe \"\$77MsMpEng.exe.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4792
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks.exe" /query /TN $77MsMpEng.exe.exe
      4⤵
      PID:4692
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /sc daily /tn "MsMpEng.exe_Task-DAILY-21PM" /TR "%MyFile%" /ST 21:00
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1373.tmp.bat

Filesize
150B

MD5
46089d2b133c8ef8f36f6b4e73027302

SHA1
bb0f14148c3d7f5d3330bf55e33e9fe5d43dd7f7

SHA256
41798edc641983d6efca392f9c7b067e6b3a8bd64899168d599b5d909947e07b

SHA512
000db3b3be97f6808102ccde813870d9706047b35ac878477d1015eb6521db8beacec427d3915328d998ae2ebc87b4275541645f2a42786117c4e4057bf480eb

Download Submit
C:\Users\Admin\MsMpEng\$77MsMpEng.exe.exe

Filesize
44KB

MD5
f52808e0eea172b4af8d7ea850dc3cf0

SHA1
8f5f76df4251a1acfb13f0e02262f5e431287e23

SHA256
a197a920c0c3bf253163ffc4202aa64d5b58e6fbc57f167c352c17452a03ee66

SHA512
3860ba747702ed1c586ea5be1cde7bb330d58e5fe8d92a67c928f1056be1f1ec4d404ae4171e5b8a80050862d6c3f8f7dbb91d40154ee4203d5f8cc650c8bf40

Download Submit
memory/2948-0-0x00007FFA50573000-0x00007FFA50575000-memory.dmp

Filesize
8KB

Download
memory/2948-1-0x0000000000B10000-0x0000000000B20000-memory.dmp

Filesize
64KB

Download
memory/2948-2-0x00007FFA50570000-0x00007FFA51032000-memory.dmp

Filesize
10.8MB

Download
memory/2948-3-0x00007FFA50573000-0x00007FFA50575000-memory.dmp

Filesize
8KB

Download
memory/2948-4-0x00007FFA50570000-0x00007FFA51032000-memory.dmp

Filesize
10.8MB

Download
memory/2948-10-0x00007FFA50570000-0x00007FFA51032000-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