anchordns | eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536

General

Target

eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe
Size

481KB
MD5

b05dc02b630924cb951e5e999269a9e7
SHA1

49f6d0beca33af85e8a5ba64aa9e848ce250188b
SHA256

eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536
SHA512

2a2cf9bfa42fe91a1d3db533653f531625e43effb0f169567e411a435f6b1c0998a4329559648e5d864b7333cd8230abc8a5b39df91fa3309ac88dd6f0e3342c

Score

10^/10

anchordns backdoor persistence suricata

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/0x008f00000000fbae-115.dat	family_anchor_dns

suricata: ET MALWARE Win32/TrickBot Anchor Variant Style External IP Check
suricata: ET MALWARE Win32/TrickBot Anchor Variant Style External IP Check
suricata
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 8 IoCs

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

flow	ioc
10	toexample.bazar
11	toexample.bazar
14	toexample.bazar
15	toexample.bazar
16	toexample.bazar
19	toexample.bazar
8	toexample.bazar
9	toexample.bazar

Loads dropped DLL 1 IoCs

pid	Process
3496	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
12	checkip.amazonaws.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\netuodvt.dll	eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4252	timeout.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4284	powershell.exe
4284	powershell.exe
4284	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4284	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3468 wrote to memory of 3076	3468	eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe	70
PID 3468 wrote to memory of 3076	3468	eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe	70
PID 3468 wrote to memory of 4016	3468	eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe	71
PID 3468 wrote to memory of 4016	3468	eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe	71
PID 4016 wrote to memory of 4284	4016	cmd.exe	74
PID 4016 wrote to memory of 4284	4016	cmd.exe	74
PID 3076 wrote to memory of 4252	3076	cmd.exe	75
PID 3076 wrote to memory of 4252	3076	cmd.exe	75

C:\Users\Admin\AppData\Local\Temp\eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe
"C:\Users\Admin\AppData\Local\Temp\eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3468
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /c timeout 5 && del C:\Users\Admin\AppData\Local\Temp\eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3076
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:4252
- C:\Windows\SYSTEM32\cmd.exe
  cmd.exe /C PowerShell "Start-Sleep 5; Remove-Item C:\Users\Admin\AppData\Local\Temp\eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4016
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    PowerShell "Start-Sleep 5; Remove-Item C:\Users\Admin\AppData\Local\Temp\eea37d92dc98bb28cdd5b999b8a9d9d598391d494a1984813d26322b8b857536.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4284

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/4284-121-0x000001E0C8CC0000-0x000001E0C8CE2000-memory.dmp

Filesize
136KB

Download
memory/4284-126-0x000001E0E1223000-0x000001E0E1225000-memory.dmp

Filesize
8KB

Download
memory/4284-125-0x000001E0E1220000-0x000001E0E1222000-memory.dmp

Filesize
8KB

Download
memory/4284-127-0x000001E0E3380000-0x000001E0E33F6000-memory.dmp

Filesize
472KB

Download
memory/4284-141-0x000001E0E1226000-0x000001E0E1228000-memory.dmp

Filesize
8KB

Download
memory/4284-142-0x000001E0E1228000-0x000001E0E1229000-memory.dmp

Filesize
4KB

Download

Analysis

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