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
3944	attrib.exe
3512	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-1-5-21-2436272344-4274332273-444425594-1000\Control Panel\International\Geo\Nation	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe

Executes dropped EXE 1 IoCs

pid	Process
1692	$77Microsoft.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 24 IoCs

pid	Process
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
1692	$77Microsoft.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
Token: SeDebugPrivilege	1692	$77Microsoft.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1692	$77Microsoft.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 3512	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	85
PID 4140 wrote to memory of 3512	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	85
PID 4140 wrote to memory of 3944	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	87
PID 4140 wrote to memory of 3944	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	87
PID 4140 wrote to memory of 2416	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	90
PID 4140 wrote to memory of 2416	4140	7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe	90
PID 2416 wrote to memory of 2164	2416	cmd.exe	92
PID 2416 wrote to memory of 2164	2416	cmd.exe	92
PID 2416 wrote to memory of 1692	2416	cmd.exe	93
PID 2416 wrote to memory of 1692	2416	cmd.exe	93

Views/modifies file attributes 1 TTPs 2 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
3512	attrib.exe
3944	attrib.exe

C:\Users\Admin\AppData\Local\Temp\7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe
"C:\Users\Admin\AppData\Local\Temp\7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4140
- 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:3512
- 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:3944
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCB10.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2416
- - 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:1692

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCB10.tmp.bat

Filesize
166B

MD5
82b829c305f0619fb90a793dbd9e9ed9

SHA1
25427768cbe0414c8ae65e3ec5a631b6111a27eb

SHA256
f4dcf42cbdbaf6e9b13a95df3e65d395c394d8943bfba0a91392566f85cc9faa

SHA512
eb8514fbbced693167cf630c79fde14dcac0356076ef3fccc436cbc5c8cf9669872e1a507c8a2930ef38ce3e6714fee82c37cf43f473873ef5bd3bfe4a87b010

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

Filesize
41KB

MD5
5eba805a50032778522fd8d48ac974c5

SHA1
2d04750a82759c60d85d5a8331ae2734b9fc5814

SHA256
7935b11931c6b3309bba5ebc013d826a694aae29b1a611003af62f4337fc98ac

SHA512
d82b874adc774b1828d97026aba6bbc0f11b3354638e1db338b86f6edd486704d9eb5dec4408d196de4ad966ef75af0503a052681524f2b825416da3103809e4

Download Submit
memory/1692-12-0x00007FFDEA270000-0x00007FFDEAD31000-memory.dmp

Filesize
10.8MB

Download
memory/1692-13-0x00007FFDEA270000-0x00007FFDEAD31000-memory.dmp

Filesize
10.8MB

Download
memory/4140-0-0x00007FFDEA273000-0x00007FFDEA275000-memory.dmp

Filesize
8KB

Download
memory/4140-1-0x0000000000260000-0x000000000026E000-memory.dmp

Filesize
56KB

Download
memory/4140-2-0x00007FFDEA270000-0x00007FFDEAD31000-memory.dmp

Filesize
10.8MB

Download
memory/4140-4-0x00007FFDEA273000-0x00007FFDEA275000-memory.dmp

Filesize
8KB

Download
memory/4140-5-0x00007FFDEA270000-0x00007FFDEAD31000-memory.dmp

Filesize
10.8MB

Download
memory/4140-10-0x00007FFDEA270000-0x00007FFDEAD31000-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