vanillarat | 3d18fbbcd58e4f162059ff00d08510fcb43d90cf676ad8ecc929d5c36395f19f

Resubmissions

14-11-2024 20:02

241114-yr8feasemg 10

14-11-2024 19:59

241114-yqcx4ssdqp 10

Analysis

max time kernel
1799s
max time network
1800s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
14-11-2024 20:02

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General

Target

yasser.exe
Size

114KB
MD5

5bf506720c41a2b752daa11398c6dc6b
SHA1

8c37bdd4eda3b71ea2ee17556763ab90c7067dba
SHA256

3d18fbbcd58e4f162059ff00d08510fcb43d90cf676ad8ecc929d5c36395f19f
SHA512

a6ca960e64547ef9f88a8479ce2663b1d2402864d077b68c3992bd00f7c447da0bf93bc474bf2c2bc9161d3ce34df01b16b4cfbc6f880d4f1b603a49f9c0428c
SSDEEP

3072:3gZApdYrD28fbJB2yLtyTIbjjxK3QdjrxivW+DXnH4vymb81w:3/pe1J0IbXtrxivW+D34vu

Score

10^/10

vanillarat discovery persistence rat

Malware Config

Signatures

VanillaRat
VanillaRat is an advanced remote administration tool coded in C#.
rat vanillarat
Vanillarat family
vanillarat

Vanilla Rat payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/4752-1-0x0000000000D10000-0x0000000000D32000-memory.dmp	vanillarat
C:\Users\Admin\AppData\Roaming\yasser.exe	vanillarat

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

Processes:

yasser.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation yasser.exe
Executes dropped EXE 1 IoCs

Processes:

yasser.exe

pid process

2376 yasser.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\Control Panel\International\Geo\Nation	yasser.exe

pid	process
2376	yasser.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

yasser.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1361837696-2276465416-1936241636-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yasser = "C:\\Users\\Admin\\AppData\\Roaming\\yasser.exe"	yasser.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

yasser.exeyasser.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yasser.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yasser.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

yasser.exe

description pid process

Token: SeDebugPrivilege 4752 yasser.exe

description	pid	process
Token: SeDebugPrivilege	4752	yasser.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

yasser.exe

description	pid	process	target process
PID 4752 wrote to memory of 2376	4752	yasser.exe	yasser.exe
PID 4752 wrote to memory of 2376	4752	yasser.exe	yasser.exe
PID 4752 wrote to memory of 2376	4752	yasser.exe	yasser.exe

C:\Users\Admin\AppData\Local\Temp\yasser.exe
"C:\Users\Admin\AppData\Local\Temp\yasser.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4752
- C:\Users\Admin\AppData\Roaming\yasser.exe
  "C:\Users\Admin\AppData\Roaming\yasser.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  PID:2376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\yasser.exe

Filesize
114KB

MD5
5bf506720c41a2b752daa11398c6dc6b

SHA1
8c37bdd4eda3b71ea2ee17556763ab90c7067dba

SHA256
3d18fbbcd58e4f162059ff00d08510fcb43d90cf676ad8ecc929d5c36395f19f

SHA512
a6ca960e64547ef9f88a8479ce2663b1d2402864d077b68c3992bd00f7c447da0bf93bc474bf2c2bc9161d3ce34df01b16b4cfbc6f880d4f1b603a49f9c0428c

Download Submit
memory/2376-8-0x0000000074A10000-0x00000000751C1000-memory.dmp

Filesize
7.7MB

Download
memory/2376-9-0x0000000074A10000-0x00000000751C1000-memory.dmp

Filesize
7.7MB

Download
memory/2376-10-0x0000000074A10000-0x00000000751C1000-memory.dmp

Filesize
7.7MB

Download
memory/2376-11-0x0000000074A10000-0x00000000751C1000-memory.dmp

Filesize
7.7MB

Download
memory/4752-0-0x0000000074A1E000-0x0000000074A1F000-memory.dmp

Filesize
4KB

Download
memory/4752-1-0x0000000000D10000-0x0000000000D32000-memory.dmp

Filesize
136KB

Download
memory/4752-2-0x0000000005C90000-0x0000000006236000-memory.dmp

Filesize
5.6MB

Download
memory/4752-3-0x0000000005780000-0x0000000005812000-memory.dmp

Filesize
584KB

Download
memory/4752-4-0x0000000005740000-0x000000000574A000-memory.dmp

Filesize
40KB

Download
memory/4752-5-0x0000000074A10000-0x00000000751C1000-memory.dmp

Filesize
7.7MB

Download
memory/4752-7-0x0000000074A10000-0x00000000751C1000-memory.dmp

Filesize
7.7MB

Download