silverrat | c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d

Analysis

max time kernel
59s
max time network
18s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25/03/2025, 19:14

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General

Target

c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe
Size

41KB
MD5

93ef50df74666f54da98625bc7842ff6
SHA1

eb45709f3b838482060703221f0e8283e583523f
SHA256

c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d
SHA512

d959a28008a710c22aab50e39fffc62f445e9d8acc2fd1a661d3b4b2290c3504c613533db822dd93a2a6b445f3488026b3335ed3e3be3dffd1a68ab1eec056e8
SSDEEP

768:mdoPA8PnwIt3dO3CTRkayAdzRU59fj7z1QB6SAdxU:mdold7tbzG59Lv1QotdxU

Score

10^/10

silverrat defense_evasion execution persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

127.0.0.1:9999

Mutex

lAxDBRhAFu

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
b0FGeVZNcFRMWVloVHR6Z0VESU5RdlpZUmxZbUFE
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
2584	attrib.exe
2636	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2656	powercheat.exe

Loads dropped DLL 1 IoCs

pid	Process
2528	cmd.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\\powercheat\\powercheat.exe\""	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1244	powershell.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
2520	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
2568	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe
2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe
2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe
2656	powercheat.exe
1244	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe
Token: SeDebugPrivilege	2656	powercheat.exe
Token: SeDebugPrivilege	1244	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2656	powercheat.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 2584	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	28
PID 2228 wrote to memory of 2584	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	28
PID 2228 wrote to memory of 2584	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	28
PID 2228 wrote to memory of 2636	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	30
PID 2228 wrote to memory of 2636	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	30
PID 2228 wrote to memory of 2636	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	30
PID 2228 wrote to memory of 2528	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	32
PID 2228 wrote to memory of 2528	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	32
PID 2228 wrote to memory of 2528	2228	c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe	32
PID 2528 wrote to memory of 2520	2528	cmd.exe	34
PID 2528 wrote to memory of 2520	2528	cmd.exe	34
PID 2528 wrote to memory of 2520	2528	cmd.exe	34
PID 2528 wrote to memory of 2656	2528	cmd.exe	35
PID 2528 wrote to memory of 2656	2528	cmd.exe	35
PID 2528 wrote to memory of 2656	2528	cmd.exe	35
PID 2656 wrote to memory of 2504	2656	powercheat.exe	36
PID 2656 wrote to memory of 2504	2656	powercheat.exe	36
PID 2656 wrote to memory of 2504	2656	powercheat.exe	36
PID 2656 wrote to memory of 2568	2656	powercheat.exe	38
PID 2656 wrote to memory of 2568	2656	powercheat.exe	38
PID 2656 wrote to memory of 2568	2656	powercheat.exe	38
PID 2656 wrote to memory of 2536	2656	powercheat.exe	40
PID 2656 wrote to memory of 2536	2656	powercheat.exe	40
PID 2656 wrote to memory of 2536	2656	powercheat.exe	40
PID 2656 wrote to memory of 1244	2656	powercheat.exe	42
PID 2656 wrote to memory of 1244	2656	powercheat.exe	42
PID 2656 wrote to memory of 1244	2656	powercheat.exe	42

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
2584	attrib.exe
2636	attrib.exe

C:\Users\Admin\AppData\Local\Temp\c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe
"C:\Users\Admin\AppData\Local\Temp\c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\powercheat"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2584
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\powercheat\powercheat.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2636
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA46A.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2528
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2520
- - C:\Users\Admin\powercheat\powercheat.exe
    "C:\Users\Admin\powercheat\powercheat.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2656
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN powercheat.exe
      4⤵
      PID:2504
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /Create /SC ONCE /TN "powercheat.exe" /TR "C:\Users\Admin\powercheat\powercheat.exe \"\powercheat.exe\" /AsAdmin" /ST 00:01 /IT /F /RL HIGHEST
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2568
  - - C:\Windows\system32\schtasks.exe
      "schtasks.exe" /query /TN powercheat.exe
      4⤵
      PID:2536
  - - 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:1244

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA46A.tmp.bat

Filesize
149B

MD5
614a8f82d716629637d8e1190f000580

SHA1
d7f8aafa1bbab15b6ebb643120354c32e6f27d1b

SHA256
0358484ce3a99f34487179836deb7f4419b07ccc52b12618e217c6a92e211e4d

SHA512
58ac6a458567b05e1d32896d52322798865fd3a11ab47db7bb03cdfa75348365c89b14b998bc91388acf902ebd685aece3f5a06ef38272aa2e924d97274737ae

Download Submit
C:\Users\Admin\powercheat\powercheat.exe

Filesize
41KB

MD5
93ef50df74666f54da98625bc7842ff6

SHA1
eb45709f3b838482060703221f0e8283e583523f

SHA256
c9ecb84814dbdd6ca8db5e7998eba0f0d79bf1cfc74281aaf9463e150954ae1d

SHA512
d959a28008a710c22aab50e39fffc62f445e9d8acc2fd1a661d3b4b2290c3504c613533db822dd93a2a6b445f3488026b3335ed3e3be3dffd1a68ab1eec056e8

Download Submit
memory/1244-22-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/1244-23-0x00000000028E0000-0x00000000028E8000-memory.dmp

Filesize
32KB

Download
memory/2228-0-0x000007FEF58A3000-0x000007FEF58A4000-memory.dmp

Filesize
4KB

Download
memory/2228-1-0x000000013FFC0000-0x000000013FFCE000-memory.dmp

Filesize
56KB

Download
memory/2228-2-0x000007FEF58A0000-0x000007FEF628C000-memory.dmp

Filesize
9.9MB

Download
memory/2228-4-0x000007FEF58A3000-0x000007FEF58A4000-memory.dmp

Filesize
4KB

Download
memory/2228-5-0x000007FEF58A0000-0x000007FEF628C000-memory.dmp

Filesize
9.9MB

Download
memory/2228-14-0x000007FEF58A0000-0x000007FEF628C000-memory.dmp

Filesize
9.9MB

Download
memory/2656-17-0x000000013F4A0000-0x000000013F4AE000-memory.dmp

Filesize
56KB

Download