asyncrat | 12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6

General

Target

12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
Size

46KB
MD5

194de251c043183099b2d6f7f5d1e09f
SHA1

dc477dfc0e090e8d7bd31fb808f59060dd2cf360
SHA256

12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6
SHA512

6a1433b9bc070f18f60c3f115a1173e8979d211f6e97daf3fc7fe13f05ab15123874919418fc014fdd8af62c82426cb091b867b36a49fe7fc8fe929709b3a433
SSDEEP

768:fqZKAqubXIsg3uNkOicvHk3eHlWMPbPgF0qgkx5XKbukYI6OCm2tYcFmVc6KD:f/1uNXvZH0ub4FrgQwv6OrKmVclD

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6A

C2

dgorijan20785.hopto.org:6606

dgorijan20785.hopto.org:7707

dgorijan20785.hopto.org:8808

Mutex

v5tvc4rc3ex778899

Attributes

delay
5
install
true
install_file
audiodrvs.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Detects file containing reversed ASEP Autorun registry keys 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1512-0-0x0000000000D40000-0x0000000000D52000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_ASEP_REG_Reverse

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe

Executes dropped EXE 1 IoCs

Processes:

audiodrvs.exe

pid process

4076 audiodrvs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2792 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4064 timeout.exe

pid	process
4076	audiodrvs.exe

pid	process
2792	schtasks.exe

pid	process
4064	timeout.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exeaudiodrvs.exe

pid	process
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
4076	audiodrvs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exeaudiodrvs.exe

description	pid	process
Token: SeDebugPrivilege	1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
Token: SeDebugPrivilege	4076	audiodrvs.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.execmd.exe

description	pid	process	target process
PID 1512 wrote to memory of 2792	1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe	schtasks.exe
PID 1512 wrote to memory of 2792	1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe	schtasks.exe
PID 1512 wrote to memory of 4408	1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe	cmd.exe
PID 1512 wrote to memory of 4408	1512	12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe	cmd.exe
PID 4408 wrote to memory of 4064	4408	cmd.exe	timeout.exe
PID 4408 wrote to memory of 4064	4408	cmd.exe	timeout.exe
PID 4408 wrote to memory of 4076	4408	cmd.exe	audiodrvs.exe
PID 4408 wrote to memory of 4076	4408	cmd.exe	audiodrvs.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe
"C:\Users\Admin\AppData\Local\Temp\12bee16f9692cb9a6d3713543cf998a4f953d0341f4e9c661748faef525d91e6.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "'audiodrvs"' /tr "'C:\Users\Admin\AppData\Roaming\audiodrvs.exe"'
  2⤵
  - Creates scheduled task(s)
  PID:2792
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6A91.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4408
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4064
- - C:\Users\Admin\AppData\Roaming\audiodrvs.exe
    "C:\Users\Admin\AppData\Roaming\audiodrvs.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6A91.tmp.bat

Filesize
153B

MD5
4a936dba32583de4c555279ac12e8b44

SHA1
60bbd5fa6ebdb86ec26748fb32f15c0e7bb5340a

SHA256
dd2f38841141cc033ebef38707c9fe60e30f53e3b857845ea1a374db3ddde006

SHA512
bc38c777345cd440065279c335c95b81305bdf512dd26fa56ea71c93f3a0ac7216756c281732121fbe4b793ee31745e313375858c572644d64079167aba1d931

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

Filesize
40.2MB

MD5
4dca48d98c3348178ad53a70c8e4cd96

SHA1
dcf73de68e9482081abee4c7857b0dc1ed72b53a

SHA256
5f1ce36935d13253391c1525d6a844d1bb21aac1bdab40b33e1e9520ca503f9d

SHA512
7046fda50f43ae1425a00318daf2a15e78743b462eac3d017b57469212345ebe902be114edffbac61f6e68a9ecefe1e36b0a7c50493968613e7628ca38a1cccf

Download Submit
memory/1512-1-0x00007FFE63123000-0x00007FFE63125000-memory.dmp

Filesize
8KB

Download
memory/1512-0-0x0000000000D40000-0x0000000000D52000-memory.dmp

Filesize
72KB

Download
memory/1512-2-0x00007FFE63120000-0x00007FFE63BE1000-memory.dmp

Filesize
10.8MB

Download
memory/1512-8-0x00007FFE63120000-0x00007FFE63BE1000-memory.dmp

Filesize
10.8MB

Download
memory/4076-12-0x00007FFE63120000-0x00007FFE63BE1000-memory.dmp

Filesize
10.8MB

Download
memory/4076-15-0x00007FFE63120000-0x00007FFE63BE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads