vanillarat | 4c477e0e78863415e64ce9656ef2d1db0e45e60d02ccd21ad52ae51f637815f1

Reason

Machine shutdown

General

Target
TeamViewer_Setup.exe
Size 470KB
Sample230718-mbc4sahe42
SHA256 4c477e0e78863415e64ce9656ef2d1db0e45e60d02ccd21ad52ae51f637815f1
MD5 17e792b0bb256533ce3fda3a2c4a093a
SHA1 901d60993c45332419f9f8619dec044e2a9fc41a
SHA512 e5cea3e26bb612067546e7eb8e21689a98a1c6ff032ff466eface6cee1cb8c547880efe1bc9e2046e121e637e6fa032fb311b1b22aa18d501bfbc15970e448eb
SSDEEP 6144:hqly+DJZKBI0FyYeY4eoiJ+sCFv1A4Inlz+:SOyYrZos+xFvIl6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

vanillarat evasion persistence rat trojan

Malware Config

Signatures

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

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

Vanilla Rat payload 1 IoCs

rat

resource	yara_rule
behavioral1/memory/2892-54-0x0000000000D00000-0x0000000000D7E000-memory.dmp	vanillarat

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\EsetNOD32 = "C:\\Windows\\System32\\dllhоst.exe"	reg.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\dllhоst.exe	TeamViewer_Setup.exe
File created	C:\Windows\SysWOW64\install.cmd	TeamViewer_Setup.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
2860	reg.exe
2108	reg.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2892	TeamViewer_Setup.exe
Token: SeShutdownPrivilege	2392	shutdown.exe
Token: SeRemoteShutdownPrivilege	2392	shutdown.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2844	2892	TeamViewer_Setup.exe	29
PID 2892 wrote to memory of 2844	2892	TeamViewer_Setup.exe	29
PID 2892 wrote to memory of 2844	2892	TeamViewer_Setup.exe	29
PID 2892 wrote to memory of 2844	2892	TeamViewer_Setup.exe	29
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2892 wrote to memory of 2104	2892	TeamViewer_Setup.exe	30
PID 2844 wrote to memory of 2860	2844	cmd.exe	31
PID 2844 wrote to memory of 2860	2844	cmd.exe	31
PID 2844 wrote to memory of 2860	2844	cmd.exe	31
PID 2844 wrote to memory of 2860	2844	cmd.exe	31
PID 2104 wrote to memory of 2108	2104	cmd.exe	32
PID 2104 wrote to memory of 2108	2104	cmd.exe	32
PID 2104 wrote to memory of 2108	2104	cmd.exe	32
PID 2104 wrote to memory of 2108	2104	cmd.exe	32
PID 2104 wrote to memory of 2392	2104	cmd.exe	33
PID 2104 wrote to memory of 2392	2104	cmd.exe	33
PID 2104 wrote to memory of 2392	2104	cmd.exe	33
PID 2104 wrote to memory of 2392	2104	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2844
- - C:\Windows\SysWOW64\reg.exe
    reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Run /v EsetNOD32 /t REG_SZ /d C:\Windows\System32\dllhоst.exe /f
    3⤵
    - Adds Run key to start application
    - Modifies registry key
    PID:2860
- C:\Windows\SysWOW64\cmd.exe
  cmd /c C:\Windows\System32\install.cmd
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2104
- - C:\Windows\SysWOW64\reg.exe
    reg add HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - Modifies registry key
    PID:2108
- - C:\Windows\SysWOW64\shutdown.exe
    shutdown -r -t 1
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2392

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:2876

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

install.cmd

Path C:\Windows\SysWOW64\install.cmd
Size 139B
SHA256 69e87d18a60bc161d236af5471c6598b6897e297d2b26f0b3e9a63bd4475501f
MD5 6bb1de604664795e452c73659ff8ced7
SHA1 93587cb366f8f46ad592f4eb9850837e1cafef73
SHA512 e71dda2217b6bf338e8ade43249d7a726ee93d504760c11694232b1d4b15d41557d8f61f451f6c8b67f86b9acc16e214d2dc479fed24c4e67bd1169dff553bcd
MD5 SHA1 SHA512

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install.cmd

Path C:\Windows\SysWOW64\install.cmd
Size 139B
SHA256 69e87d18a60bc161d236af5471c6598b6897e297d2b26f0b3e9a63bd4475501f
MD5 6bb1de604664795e452c73659ff8ced7
SHA1 93587cb366f8f46ad592f4eb9850837e1cafef73
SHA512 e71dda2217b6bf338e8ade43249d7a726ee93d504760c11694232b1d4b15d41557d8f61f451f6c8b67f86b9acc16e214d2dc479fed24c4e67bd1169dff553bcd
MD5 SHA1 SHA512

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memory/1900-67-0x00000000026E0000-0x00000000026E1000-memory.dmp

Download

memory/2876-66-0x00000000029C0000-0x00000000029C1000-memory.dmp

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memory/2892-54-0x0000000000D00000-0x0000000000D7E000-memory.dmp

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memory/2892-55-0x0000000074AB0000-0x000000007519E000-memory.dmp

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memory/2892-65-0x0000000074AB0000-0x000000007519E000-memory.dmp

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Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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