vanillarat | 6e977411cea076427e903cba32827b2d78202021f62c6b045c1e4a65042e8d15

General

Target

FirefoxInstallerexe.exe
Size

188KB
MD5

43797b66dbc85e52db3f9ccbbab6a811
SHA1

47cb18b091310ad396684f0619261332f1164f8d
SHA256

6e977411cea076427e903cba32827b2d78202021f62c6b045c1e4a65042e8d15
SHA512

c50e4c1855c7f44c7d83f650e18cbb05686b85ac993eb828cb8181106dfcf5b4fe732a97839430e44e7ef198dde0e5459a52845ff487597e039e63f4d7561fd5
SSDEEP

3072:LJZKnPE2YyJzELtyThyYeY8lNgoiJ+sX8HFvytb3NuIMAAcoQntK+C7VieM3SFZK:LJZKBI0hyYeY4eoiJ+sCFvCU/TQwX3Mp

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 7 IoCs

rat

resource	yara_rule
behavioral2/memory/4872-133-0x0000000000E10000-0x0000000000E46000-memory.dmp	vanillarat
behavioral2/files/0x000900000002320e-138.dat	vanillarat
behavioral2/files/0x000900000002320e-161.dat	vanillarat
behavioral2/files/0x000900000002320e-163.dat	vanillarat
behavioral2/memory/1148-164-0x0000000000600000-0x0000000000622000-memory.dmp	vanillarat
behavioral2/files/0x000700000002321e-177.dat	vanillarat
behavioral2/files/0x000700000002321e-178.dat	vanillarat

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-1-5-21-1043950675-1972537973-2972532878-1000\Control Panel\International\Geo\Nation	FirefoxInstallerexe.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1043950675-1972537973-2972532878-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
1148	svchost.exe
3344	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1043950675-1972537973-2972532878-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4568	4872	WerFault.exe	82

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4872	FirefoxInstallerexe.exe
Token: SeDebugPrivilege	1148	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 1148	4872	FirefoxInstallerexe.exe	84
PID 4872 wrote to memory of 1148	4872	FirefoxInstallerexe.exe	84
PID 4872 wrote to memory of 1148	4872	FirefoxInstallerexe.exe	84
PID 1148 wrote to memory of 3344	1148	svchost.exe	88
PID 1148 wrote to memory of 3344	1148	svchost.exe	88
PID 1148 wrote to memory of 3344	1148	svchost.exe	88

C:\Users\Admin\AppData\Local\Temp\FirefoxInstallerexe.exe
"C:\Users\Admin\AppData\Local\Temp\FirefoxInstallerexe.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Users\Admin\svchost.exe
  "C:\Users\Admin\svchost.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1148
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    PID:3344
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4872 -s 1492
  2⤵
  - Program crash
  PID:4568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4872 -ip 4872
1⤵
PID:4880

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Web Service

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
115KB

MD5
afd5d29bfcddb00b11a869fd2016282d

SHA1
0de3328c8a0dce66d17765665b29662de75e5d15

SHA256
38194b42cc180ab72aed1256447bec9b8b65910241e5a2b97ac29b0c12d95748

SHA512
ce3aaf59162768087bbb34de0767c74ee05e8f13a19559c49896f5249d36900ee14270ade74964c8cd3d8b6bcf684002cf3bddc8d14856907d2b2b2d0026f133

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

Filesize
115KB

MD5
afd5d29bfcddb00b11a869fd2016282d

SHA1
0de3328c8a0dce66d17765665b29662de75e5d15

SHA256
38194b42cc180ab72aed1256447bec9b8b65910241e5a2b97ac29b0c12d95748

SHA512
ce3aaf59162768087bbb34de0767c74ee05e8f13a19559c49896f5249d36900ee14270ade74964c8cd3d8b6bcf684002cf3bddc8d14856907d2b2b2d0026f133

Download Submit
C:\Users\Admin\svchost.exe

Filesize
115KB

MD5
afd5d29bfcddb00b11a869fd2016282d

SHA1
0de3328c8a0dce66d17765665b29662de75e5d15

SHA256
38194b42cc180ab72aed1256447bec9b8b65910241e5a2b97ac29b0c12d95748

SHA512
ce3aaf59162768087bbb34de0767c74ee05e8f13a19559c49896f5249d36900ee14270ade74964c8cd3d8b6bcf684002cf3bddc8d14856907d2b2b2d0026f133

Download Submit
C:\Users\Admin\svchost.exe

Filesize
115KB

MD5
afd5d29bfcddb00b11a869fd2016282d

SHA1
0de3328c8a0dce66d17765665b29662de75e5d15

SHA256
38194b42cc180ab72aed1256447bec9b8b65910241e5a2b97ac29b0c12d95748

SHA512
ce3aaf59162768087bbb34de0767c74ee05e8f13a19559c49896f5249d36900ee14270ade74964c8cd3d8b6bcf684002cf3bddc8d14856907d2b2b2d0026f133

Download Submit
C:\Users\Admin\svchost.exe

Filesize
115KB

MD5
afd5d29bfcddb00b11a869fd2016282d

SHA1
0de3328c8a0dce66d17765665b29662de75e5d15

SHA256
38194b42cc180ab72aed1256447bec9b8b65910241e5a2b97ac29b0c12d95748

SHA512
ce3aaf59162768087bbb34de0767c74ee05e8f13a19559c49896f5249d36900ee14270ade74964c8cd3d8b6bcf684002cf3bddc8d14856907d2b2b2d0026f133

Download Submit
memory/1148-164-0x0000000000600000-0x0000000000622000-memory.dmp

Filesize
136KB

Download
memory/1148-165-0x0000000005BB0000-0x0000000006154000-memory.dmp

Filesize
5.6MB

Download
memory/1148-166-0x0000000005600000-0x0000000005692000-memory.dmp

Filesize
584KB

Download
memory/1148-167-0x0000000005390000-0x000000000539A000-memory.dmp

Filesize
40KB

Download
memory/4872-133-0x0000000000E10000-0x0000000000E46000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing