anchordns | 0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b

General

Target

0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe
Size

481KB
MD5

300ebc9b82049ce2f97a7669e8d71247
SHA1

dd3421cf241ec2058167122ce6af0184fb1666ce
SHA256

0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b
SHA512

f5252183760db2a9d7c2a70fd1c8858fbf1218ae394ce863fd5045632598f2aabe0bc27b958b7a5771b09a532b0cf811b64aafdffee9219bd0b27ce255e0009a

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
behavioral1/files/0x000700000001303f-54.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 2 IoCs

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

flow	ioc
2	toexample.bazar
3	toexample.bazar

Deletes itself 1 IoCs

pid	Process
776	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
324	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
4	checkip.amazonaws.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\netkykxi.dll	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1764	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1644	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1644	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 776	1956	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe	28
PID 1956 wrote to memory of 776	1956	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe	28
PID 1956 wrote to memory of 776	1956	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe	28
PID 1956 wrote to memory of 772	1956	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe	29
PID 1956 wrote to memory of 772	1956	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe	29
PID 1956 wrote to memory of 772	1956	0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe	29
PID 772 wrote to memory of 1644	772	cmd.exe	32
PID 772 wrote to memory of 1644	772	cmd.exe	32
PID 772 wrote to memory of 1644	772	cmd.exe	32
PID 776 wrote to memory of 1764	776	cmd.exe	33
PID 776 wrote to memory of 1764	776	cmd.exe	33
PID 776 wrote to memory of 1764	776	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe
"C:\Users\Admin\AppData\Local\Temp\0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Windows\system32\cmd.exe
  cmd.exe /c timeout 5 && del C:\Users\Admin\AppData\Local\Temp\0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:776
- - C:\Windows\system32\timeout.exe
    timeout 5
    3⤵
    - Delays execution with timeout.exe
    PID:1764
- C:\Windows\system32\cmd.exe
  cmd.exe /C PowerShell "Start-Sleep 5; Remove-Item C:\Users\Admin\AppData\Local\Temp\0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:772
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    PowerShell "Start-Sleep 5; Remove-Item C:\Users\Admin\AppData\Local\Temp\0e1d5d891662f275badff2f98e24600d36db462bd30f84fba71ebf67142b460b.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1644

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/1644-55-0x000007FEFBE11000-0x000007FEFBE13000-memory.dmp

Filesize
8KB

Download
memory/1644-57-0x00000000027E0000-0x00000000027E2000-memory.dmp

Filesize
8KB

Download
memory/1644-58-0x00000000027E2000-0x00000000027E4000-memory.dmp

Filesize
8KB

Download
memory/1644-59-0x00000000027E4000-0x00000000027E7000-memory.dmp

Filesize
12KB

Download
memory/1644-56-0x000007FEF2D50000-0x000007FEF38AD000-memory.dmp

Filesize
11.4MB

Download
memory/1644-60-0x000000001B810000-0x000000001BB0F000-memory.dmp

Filesize
3.0MB

Download
memory/1644-61-0x00000000027EB000-0x000000000280A000-memory.dmp

Filesize
124KB

Download

Analysis

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