vanillarat | 6fa9194ea5cbd4ca364cb4f26057ee3634f9f10801830395cb7ea80603872db7

Analysis

max time kernel
60s
max time network
64s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
12-01-2023 13:50

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General

Target

aa.exe
Size

114KB
MD5

7a4c9cf72195a9dde50225e94a678172
SHA1

535054bd86760cc64b2750414e6e315068bc3912
SHA256

6fa9194ea5cbd4ca364cb4f26057ee3634f9f10801830395cb7ea80603872db7
SHA512

dd031245aeff25199c8eac585de8c22aad15373783eb3bbccccd3230b7c67966893a4f340a70f887b3ed6208dc9a423865fb7b1a46503485e8bb1268f9fca53f
SSDEEP

3072:0gZApdYrD28fbJB2yLtyTIbjjxK3QdjrxivW+DXnH4vymbW1w:0/pe1J0IbXtrxivW+D34v8

Score

10^/10

vanillarat persistence rat

Malware Config

Signatures

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

Vanilla Rat payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/792-132-0x0000000000950000-0x0000000000972000-memory.dmp	vanillarat
behavioral1/files/0x000300000001e74b-137.dat	vanillarat
behavioral1/files/0x000300000001e74b-138.dat	vanillarat
behavioral1/files/0x000300000001e74b-141.dat	vanillarat

Executes dropped EXE 2 IoCs

pid	Process
2352	aa.exe
2332	aa.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	aa.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	aa.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\aa = "C:\\Users\\Admin\\AppData\\Roaming\\aa.exe"	aa.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\aa = "C:\\Users\\Admin\\AppData\\Roaming\\aa.exe"	aa.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
36	ip-api.com

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	792	aa.exe
Token: SeDebugPrivilege	2352	aa.exe
Token: SeDebugPrivilege	2332	aa.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 792 wrote to memory of 2352	792	aa.exe	83
PID 792 wrote to memory of 2352	792	aa.exe	83
PID 792 wrote to memory of 2352	792	aa.exe	83
PID 2352 wrote to memory of 2332	2352	aa.exe	89
PID 2352 wrote to memory of 2332	2352	aa.exe	89
PID 2352 wrote to memory of 2332	2352	aa.exe	89

C:\Users\Admin\AppData\Local\Temp\aa.exe
"C:\Users\Admin\AppData\Local\Temp\aa.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:792
- C:\Users\Admin\AppData\Roaming\aa.exe
  "C:\Users\Admin\AppData\Roaming\aa.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Users\Admin\AppData\Roaming\aa.exe
    "C:\Users\Admin\AppData\Roaming\aa.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    PID:2332

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
114KB

MD5
7a4c9cf72195a9dde50225e94a678172

SHA1
535054bd86760cc64b2750414e6e315068bc3912

SHA256
6fa9194ea5cbd4ca364cb4f26057ee3634f9f10801830395cb7ea80603872db7

SHA512
dd031245aeff25199c8eac585de8c22aad15373783eb3bbccccd3230b7c67966893a4f340a70f887b3ed6208dc9a423865fb7b1a46503485e8bb1268f9fca53f

Download Submit
C:\Users\Admin\AppData\Roaming\aa.exe

Filesize
114KB

MD5
7a4c9cf72195a9dde50225e94a678172

SHA1
535054bd86760cc64b2750414e6e315068bc3912

SHA256
6fa9194ea5cbd4ca364cb4f26057ee3634f9f10801830395cb7ea80603872db7

SHA512
dd031245aeff25199c8eac585de8c22aad15373783eb3bbccccd3230b7c67966893a4f340a70f887b3ed6208dc9a423865fb7b1a46503485e8bb1268f9fca53f

Download Submit
C:\Users\Admin\AppData\Roaming\aa.exe

Filesize
114KB

MD5
7a4c9cf72195a9dde50225e94a678172

SHA1
535054bd86760cc64b2750414e6e315068bc3912

SHA256
6fa9194ea5cbd4ca364cb4f26057ee3634f9f10801830395cb7ea80603872db7

SHA512
dd031245aeff25199c8eac585de8c22aad15373783eb3bbccccd3230b7c67966893a4f340a70f887b3ed6208dc9a423865fb7b1a46503485e8bb1268f9fca53f

Download Submit
memory/792-132-0x0000000000950000-0x0000000000972000-memory.dmp

Filesize
136KB

Download
memory/792-133-0x0000000005920000-0x0000000005EC4000-memory.dmp

Filesize
5.6MB

Download
memory/792-134-0x0000000005370000-0x0000000005402000-memory.dmp

Filesize
584KB

Download
memory/792-135-0x0000000005330000-0x000000000533A000-memory.dmp

Filesize
40KB

Download
memory/2332-142-0x00000000099C0000-0x00000000099D2000-memory.dmp

Filesize
72KB

Download
memory/2332-143-0x0000000009F50000-0x0000000009F8C000-memory.dmp

Filesize
240KB

Download
memory/2352-139-0x00000000095C0000-0x0000000009626000-memory.dmp

Filesize
408KB

Download