anchordns | 2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775

General

Target

2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe
Size

481KB
MD5

5d83bd79bc681fb123e9c4078437b48f
SHA1

fa98074dc18ad7e2d357b5d168c00a91256d87d1
SHA256

2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775
SHA512

933919fea47ff5102564f6597f1ed277e699cdd746835a0039fa531e50b8fbb18532626a6900b5c18e88d15d2f6173f41c3b2d8ccf9109802aaf27a502ab0dc6

Score

10^/10

anchordns backdoor persistence

Malware Config

Signatures

AnchorDNS Backdoor
A backdoor which communicates with C2 through DNS, attributed to the creators of Trickbot and Bazar.
backdoor anchordns

Detected AnchorDNS Backdoor 1 IoCs

Sample triggered yara rules associated with the AnchorDNS malware family.

backdoor

resource	yara_rule
behavioral2/files/0x000600000001ab1b-115.dat	family_anchor_dns

Sets DLL path for service in the registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Tries to connect to .bazar domain 2 IoCs

Attempts to lookup or connect to a .bazar domain, used by BazarBackdoor, Trickbot, and potentially others.

flow	ioc
8	toexample.bazar
9	toexample.bazar

Loads dropped DLL 1 IoCs

pid	Process
936	Process not Found

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
10	checkip.amazonaws.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\netbjxhu.dll	2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1880	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2280	powershell.exe
2280	powershell.exe
2280	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3144 wrote to memory of 2556	3144	2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe	70
PID 3144 wrote to memory of 2556	3144	2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe	70
PID 3144 wrote to memory of 2444	3144	2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe	71
PID 3144 wrote to memory of 2444	3144	2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe	71
PID 2444 wrote to memory of 2280	2444	cmd.exe	74
PID 2444 wrote to memory of 2280	2444	cmd.exe	74
PID 2556 wrote to memory of 1880	2556	cmd.exe	75
PID 2556 wrote to memory of 1880	2556	cmd.exe	75

C:\Users\Admin\AppData\Local\Temp\2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe
"C:\Users\Admin\AppData\Local\Temp\2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3144
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c timeout 5 && del C:\Users\Admin\AppData\Local\Temp\2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2556
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:1880
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /C PowerShell "Start-Sleep 5; Remove-Item C:\Users\Admin\AppData\Local\Temp\2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2444
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    PowerShell "Start-Sleep 5; Remove-Item C:\Users\Admin\AppData\Local\Temp\2c446cad1e15d82521022281b81f905867e33e9ae33c3e7e4959972d40230775.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2280

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2280-121-0x000001E1CDD20000-0x000001E1CDD22000-memory.dmp

Filesize
8KB

Download
memory/2280-122-0x000001E1CDD23000-0x000001E1CDD25000-memory.dmp

Filesize
8KB

Download
memory/2280-123-0x000001E1CDCE0000-0x000001E1CDD02000-memory.dmp

Filesize
136KB

Download
memory/2280-126-0x000001E1CE740000-0x000001E1CE7B6000-memory.dmp

Filesize
472KB

Download
memory/2280-140-0x000001E1CDD26000-0x000001E1CDD28000-memory.dmp

Filesize
8KB

Download
memory/2280-141-0x000001E1CDD28000-0x000001E1CDD29000-memory.dmp

Filesize
4KB

Download

Analysis

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