anchordns | 5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399

Analysis

max time kernel
111s
max time network
147s
platform
windows10_x64
resource
win10-en-20211208
submitted
28-01-2022 21:27

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General

Target

5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe
Size

390KB
MD5

14f60998a77261a97c719b05e246716b
SHA1

3ed09498214d93c9ec14a15286546d242ad58943
SHA256

5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399
SHA512

cbc039535a2ac2cb3398436098db7b008f03899cc765d397dc2a478a37742e3e542b15f8c1f27705a6d4b823eb72457bc2b5b5a1c763f592eb7b6724f0fba200

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/0x000500000001ab13-115.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
6	foreducation.bazar
7	foreducation.bazar

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
8	checkip.amazonaws.com

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\netdvfsk.dll	5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe
File opened for modification	C:\Windows\netdvfsk.dll:$GUID	svchost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
680	timeout.exe

Modifies data under HKEY_USERS 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\OnDemandInterfaceCache	svchost.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\netdvfsk.dll:$GUID	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 3512	2620	5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe	69
PID 2620 wrote to memory of 3512	2620	5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe	69
PID 2620 wrote to memory of 3512	2620	5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe	69
PID 3512 wrote to memory of 680	3512	cmd.exe	71
PID 3512 wrote to memory of 680	3512	cmd.exe	71
PID 3512 wrote to memory of 680	3512	cmd.exe	71

C:\Users\Admin\AppData\Local\Temp\5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe
"C:\Users\Admin\AppData\Local\Temp\5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe cmd.exe /c timeout 1 && del C:\Users\Admin\AppData\Local\Temp\5739549850fe635fc0ac5de81ce1fd495669fcabc1b8ede35b82a22093c86399.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3512
- - C:\Windows\SysWOW64\timeout.exe
    timeout 1
    3⤵
    - Delays execution with timeout.exe
    PID:680

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k NetworkService
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- NTFS ADS
PID:2856

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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