silverrat | 6ccf17da9d1511886987f459d7524af6c195e853dff405ec211d9ae89163469c

General

Target

Silver.exe
Size

40KB
MD5

c99c7d1673abd0499e508de4c2445523
SHA1

e7333eb204147ac867cc06b597fb858fd29db2cc
SHA256

6ccf17da9d1511886987f459d7524af6c195e853dff405ec211d9ae89163469c
SHA512

62db95fe4f8ecb2da45afea01241886e6f97b3e9ad3b56ac5b1d8c0eea335a4dbf1c32d584ef844fb38e259625b330cde1a6cb63cf6b98c26098f9dcae97a3d1
SSDEEP

768:00sNbahnB/yoF3Yvz/DZM4snnnn71A+RUbB489ZYzb8hdB6Sc4xO:07RPL+Gt9ZYXooB4xO

Score

10^/10

silverrat evasion persistence trojan

Malware Config

Extracted

Family

silverrat

Version

1.0.0.0

C2

haffasdqa.duckdns.org:6070

Mutex

SilverMutex_ZAISHXAYQR

Attributes

certificate
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
decrypted_key
-|S.S.S|-
key
yy6zDjAUmbB09pKvo5Hhug==
key_x509
WmZhaWZHSlJEU1NHQ2lSQUdFck95dGxpQVVOd0lE
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.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3700	attrib.exe
1236	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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	Silver.exe

Executes dropped EXE 1 IoCs

pid	Process
3224	$77silver.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\\.cache\\$77silver.exe\""	Silver.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

evasion

pid	Process
3752	timeout.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

pid	Process
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
2124	Silver.exe
3224	$77silver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	Silver.exe
Token: SeDebugPrivilege	3224	$77silver.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3224	$77silver.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 1236	2124	Silver.exe	84
PID 2124 wrote to memory of 1236	2124	Silver.exe	84
PID 2124 wrote to memory of 3700	2124	Silver.exe	86
PID 2124 wrote to memory of 3700	2124	Silver.exe	86
PID 2124 wrote to memory of 1632	2124	Silver.exe	95
PID 2124 wrote to memory of 1632	2124	Silver.exe	95
PID 1632 wrote to memory of 3752	1632	cmd.exe	97
PID 1632 wrote to memory of 3752	1632	cmd.exe	97
PID 1632 wrote to memory of 3224	1632	cmd.exe	98
PID 1632 wrote to memory of 3224	1632	cmd.exe	98

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1236	attrib.exe
3700	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Silver.exe
"C:\Users\Admin\AppData\Local\Temp\Silver.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\.cache"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:1236
- C:\Windows\System32\attrib.exe
  "C:\Windows\System32\attrib.exe" +s +h "C:\Users\Admin\AppData\Roaming\.cache\$77silver.exe"
  2⤵
  - Sets file to hidden
  - Views/modifies file attributes
  PID:3700
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCE1D.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1632
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3752
- - C:\Users\Admin\AppData\Roaming\.cache\$77silver.exe
    "C:\Users\Admin\AppData\Roaming\.cache\$77silver.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3224

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\tmpCE1D.tmp.bat

Filesize
160B

MD5
d61071bc67c7f9af8b5c794af6325849

SHA1
e8ec04ad3ae76b3c701ea97e82d48d90d8601223

SHA256
f6e6f66b72024b76258ea4c37d6d9665dc4c17a728787178e75f5ff90f3a0ab7

SHA512
6a90bfabff391a3be38ec498647d11884a3092eac3150544967cc7c9139de3f7582ceb4505bb6840f2ca32096b94229a3d2dd2ee7de12f308da557c87f7576fb

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

Filesize
40KB

MD5
c99c7d1673abd0499e508de4c2445523

SHA1
e7333eb204147ac867cc06b597fb858fd29db2cc

SHA256
6ccf17da9d1511886987f459d7524af6c195e853dff405ec211d9ae89163469c

SHA512
62db95fe4f8ecb2da45afea01241886e6f97b3e9ad3b56ac5b1d8c0eea335a4dbf1c32d584ef844fb38e259625b330cde1a6cb63cf6b98c26098f9dcae97a3d1

Download Submit
memory/2124-0-0x0000000000FD0000-0x0000000000FDE000-memory.dmp

Filesize
56KB

Download
memory/2124-1-0x00007FFC9EF50000-0x00007FFC9FA11000-memory.dmp

Filesize
10.8MB

Download
memory/2124-2-0x00000000039B0000-0x00000000039C0000-memory.dmp

Filesize
64KB

Download
memory/2124-4-0x00007FFC9EF50000-0x00007FFC9FA11000-memory.dmp

Filesize
10.8MB

Download
memory/2124-9-0x00007FFC9EF50000-0x00007FFC9FA11000-memory.dmp

Filesize
10.8MB

Download
memory/3224-11-0x00007FFC9EF50000-0x00007FFC9FA11000-memory.dmp

Filesize
10.8MB

Download
memory/3224-12-0x0000000000FC0000-0x0000000000FD0000-memory.dmp

Filesize
64KB

Download
memory/3224-13-0x00007FFC9EF50000-0x00007FFC9FA11000-memory.dmp

Filesize
10.8MB

Download
memory/3224-14-0x0000000000FC0000-0x0000000000FD0000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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