vanillarat | 5a6dfde115172be8d295c748b4a681aabc1e7c105267e84e552c0c24518764df

General

Target

TeamViewer_Setup.exe
Size

152KB
MD5

3854db59d8c7964dde765803e7e380b6
SHA1

e5d981f6798cb902b7091944cdd7badafb7e0322
SHA256

5a6dfde115172be8d295c748b4a681aabc1e7c105267e84e552c0c24518764df
SHA512

3c239f667c92716ae6ac2e01cf208d18b4ab0eab61d776b757b151ff9899ba8648593c37b0b9f7c26f672255c07951b62b1cd1fb0ac84431f0aaf18690db83fa
SSDEEP

3072:EJZKnPE2YyJzELtyTJyYeY8lNgoiJ+sX8HFvytbcNGInicz+:EJZKBI0JyYeY4eoiJ+sCFvPnNz+

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
behavioral3/memory/4952-133-0x00000000008D0000-0x00000000008FE000-memory.dmp	vanillarat
behavioral3/files/0x000700000002311f-138.dat	vanillarat
behavioral3/files/0x000700000002311f-161.dat	vanillarat
behavioral3/files/0x000700000002311f-163.dat	vanillarat
behavioral3/memory/916-164-0x0000000000150000-0x0000000000172000-memory.dmp	vanillarat
behavioral3/files/0x000900000002320b-177.dat	vanillarat
behavioral3/files/0x000900000002320b-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-1-5-21-1722984668-1829624581-3022101259-1000\Control Panel\International\Geo\Nation	TeamViewer_Setup.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
916	svchost.exe
4972	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-1-5-21-1722984668-1829624581-3022101259-1000\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
2464	4952	WerFault.exe	83

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4952	TeamViewer_Setup.exe
Token: SeDebugPrivilege	916	svchost.exe
Token: SeDebugPrivilege	4972	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4952 wrote to memory of 916	4952	TeamViewer_Setup.exe	86
PID 4952 wrote to memory of 916	4952	TeamViewer_Setup.exe	86
PID 4952 wrote to memory of 916	4952	TeamViewer_Setup.exe	86
PID 916 wrote to memory of 4972	916	svchost.exe	92
PID 916 wrote to memory of 4972	916	svchost.exe	92
PID 916 wrote to memory of 4972	916	svchost.exe	92

C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe
"C:\Users\Admin\AppData\Local\Temp\TeamViewer_Setup.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4952
- 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:916
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    PID:4972
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4952 -s 1508
  2⤵
  - Program crash
  PID:2464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4952 -ip 4952
1⤵
PID:756

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

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Downloads

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

Filesize
115KB

MD5
99198c628ae018b8b7d043514141bded

SHA1
fa9b200d99530fb5efb36e7f928ad01f4dec5ed8

SHA256
160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895

SHA512
0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a

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

Filesize
115KB

MD5
99198c628ae018b8b7d043514141bded

SHA1
fa9b200d99530fb5efb36e7f928ad01f4dec5ed8

SHA256
160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895

SHA512
0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a

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

Filesize
115KB

MD5
99198c628ae018b8b7d043514141bded

SHA1
fa9b200d99530fb5efb36e7f928ad01f4dec5ed8

SHA256
160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895

SHA512
0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a

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

Filesize
115KB

MD5
99198c628ae018b8b7d043514141bded

SHA1
fa9b200d99530fb5efb36e7f928ad01f4dec5ed8

SHA256
160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895

SHA512
0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a

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

Filesize
115KB

MD5
99198c628ae018b8b7d043514141bded

SHA1
fa9b200d99530fb5efb36e7f928ad01f4dec5ed8

SHA256
160c2339126bc7800801d9d41d688f88d2d2656f711e8bc53a74fe179510e895

SHA512
0dd0f1210120d2a3838135f250460cac64ad50ee4d7393409923dadde0f8a791288ef0a2cba96e6b9ee8bb27e190b403d3c1dfd2f4a0e2262543100fdd404f4a

Download Submit
memory/916-164-0x0000000000150000-0x0000000000172000-memory.dmp

Filesize
136KB

Download
memory/916-165-0x00000000057B0000-0x0000000005D54000-memory.dmp

Filesize
5.6MB

Download
memory/916-166-0x0000000004EE0000-0x0000000004F72000-memory.dmp

Filesize
584KB

Download
memory/916-167-0x0000000004F80000-0x0000000004F8A000-memory.dmp

Filesize
40KB

Download
memory/4952-133-0x00000000008D0000-0x00000000008FE000-memory.dmp

Filesize
184KB

Download
memory/4972-179-0x0000000009C90000-0x0000000009CF6000-memory.dmp

Filesize
408KB

Download

Analysis

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