silverrat | 7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac

General

Target

7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
Size

41KB
MD5

5eba805a50032778522fd8d48ac974c5
SHA1

2d04750a82759c60d85d5a8331ae2734b9fc5814
SHA256

7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac
SHA512

d82b874adc774b1828d97026aba6bbc0f11b3354638e1db338b86f6edd486704d9eb5dec4408d196de4ad966ef75af0503a052681524f2b825416da3103809e4
SSDEEP

768:TauFSC/O0qAtH0gLV0DG9FY5RUb0eGj9xRqZB6SOWkEY:TpEaLODG9FSGIT9xSoXWkEY

Score

10^/10

silverrat defense_evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

simple-insurance.gl.at.ply.gg:52206

Mutex

SilverMutex_eCJcVEhVqR

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
a09HQW15cnhCeGFOZEhSYWlMRVBab3N3T3BGVGVh
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
2008	attrib.exe
2812	attrib.exe

Executes dropped EXE 1 IoCs

pid	Process
2380	$77Microsoft.exe

Loads dropped DLL 1 IoCs

pid	Process
2912	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\\AppData\\Roaming\\Microsoft\\$77Microsoft.exe\""	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.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
2164	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
2380	$77Microsoft.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
Token: SeDebugPrivilege	2380	$77Microsoft.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2380	$77Microsoft.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 2008	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	31
PID 804 wrote to memory of 2008	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	31
PID 804 wrote to memory of 2008	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	31
PID 804 wrote to memory of 2812	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	33
PID 804 wrote to memory of 2812	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	33
PID 804 wrote to memory of 2812	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	33
PID 804 wrote to memory of 2912	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	35
PID 804 wrote to memory of 2912	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	35
PID 804 wrote to memory of 2912	804	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	35
PID 2912 wrote to memory of 2164	2912	cmd.exe	37
PID 2912 wrote to memory of 2164	2912	cmd.exe	37
PID 2912 wrote to memory of 2164	2912	cmd.exe	37
PID 2912 wrote to memory of 2380	2912	cmd.exe	38
PID 2912 wrote to memory of 2380	2912	cmd.exe	38
PID 2912 wrote to memory of 2380	2912	cmd.exe	38

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2008	attrib.exe
2812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
"C:\Users\Admin\AppData\Local\Temp\7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:804
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2008
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\Microsoft\$77Microsoft.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:2812
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp367B.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2164
- - C:\Users\Admin\AppData\Roaming\Microsoft\$77Microsoft.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\$77Microsoft.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2380

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp367B.tmp.bat

Filesize
166B

MD5
d8b322badedf6f82c0641638e7cbff81

SHA1
9cd1729cccfe7f0b98a07fc3265346aae33d1348

SHA256
51ff2903e817127cd944ac58de03f280a160b8b554794a9fcd0f7f069f1596b9

SHA512
62ab3a1ff0e8e902bb92b7ea3ac81e73a5f85683e22913d47fcad8e307c2acdac9d6008f11b9cbe62bc8d1abe331f115e564fcd66ba37a2dc7bf896bf1f924ab

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\$77Microsoft.exe

Filesize
41KB

MD5
5eba805a50032778522fd8d48ac974c5

SHA1
2d04750a82759c60d85d5a8331ae2734b9fc5814

SHA256
7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac

SHA512
d82b874adc774b1828d97026aba6bbc0f11b3354638e1db338b86f6edd486704d9eb5dec4408d196de4ad966ef75af0503a052681524f2b825416da3103809e4

Download Submit
memory/804-0-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/804-1-0x000000013F280000-0x000000013F28E000-memory.dmp

Filesize
56KB

Download
memory/804-2-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/804-4-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/804-5-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/804-14-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2380-17-0x000000013F100000-0x000000013F10E000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads