asyncrat | 223bba409b781e7f0416284708c649b0382a1b10fd012507975365d5780bdd72

General

Target

ONEFix.exe
Size

74KB
MD5

3d5b558e7eb12c7eb23168e533b0f6d1
SHA1

05c137a41b20f6e0432ccdd40038ca70429fd08d
SHA256

71aadc7ef8af60621a64754638fca1e567109e901957f30e4563a7110dde17e5
SHA512

9f3f7a19f45abdc7d7f030b3374ca5747f714ed0ad77a889ed8979c67f9ec59732b5ebdb5949e726e5b79b93a8ae10284c43cdcf6144fb7ce94f6b4425a818bb
SSDEEP

1536:KUXNwcxKHXwzCtmPMVtNBzObsMIiH1bv/Y+3k3OQzcuLVclN:KUXicxK8WmPMVtNBzObhH1bvgmQnBY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

ahzlvriurjqtgdq

Attributes

c2_url_file
https://paste.ee/r/7pGL0uGm/0
delay
1
install
true
install_file
System.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000023cc3-12.dat	family_asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	ONEFix.exe

Executes dropped EXE 1 IoCs

pid	Process
3504	System.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4408	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2040	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
4984	ONEFix.exe
3504	System.exe
3504	System.exe
3504	System.exe
3504	System.exe
3504	System.exe
3504	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4984	ONEFix.exe
Token: SeDebugPrivilege	3504	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3504	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4984 wrote to memory of 1380	4984	ONEFix.exe	83
PID 4984 wrote to memory of 1380	4984	ONEFix.exe	83
PID 4984 wrote to memory of 1784	4984	ONEFix.exe	84
PID 4984 wrote to memory of 1784	4984	ONEFix.exe	84
PID 1784 wrote to memory of 4408	1784	cmd.exe	87
PID 1784 wrote to memory of 4408	1784	cmd.exe	87
PID 1380 wrote to memory of 2040	1380	cmd.exe	88
PID 1380 wrote to memory of 2040	1380	cmd.exe	88
PID 1784 wrote to memory of 3504	1784	cmd.exe	90
PID 1784 wrote to memory of 3504	1784	cmd.exe	90

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\ONEFix.exe
"C:\Users\Admin\AppData\Local\Temp\ONEFix.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4984
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1380
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2040
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC294.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1784
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:4408
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3504

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

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\tmpC294.tmp.bat

Filesize
150B

MD5
73bd922015a2a07babe33e4f63864030

SHA1
7efa5895483d937d16b275ab133707f76bb7c657

SHA256
2d99257cfb0edd758115886036ae1de7b89bfae3c22a13b06d86c020e5bb4e44

SHA512
5a8c637d78bab2c58cb908e99deb8067346e9647b844c3744eb8cfca8e5921da1ebd8add927c682a1af76405f8d44cdcf70da96be62efeea5905d044fd2c304f

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

Filesize
74KB

MD5
3d5b558e7eb12c7eb23168e533b0f6d1

SHA1
05c137a41b20f6e0432ccdd40038ca70429fd08d

SHA256
71aadc7ef8af60621a64754638fca1e567109e901957f30e4563a7110dde17e5

SHA512
9f3f7a19f45abdc7d7f030b3374ca5747f714ed0ad77a889ed8979c67f9ec59732b5ebdb5949e726e5b79b93a8ae10284c43cdcf6144fb7ce94f6b4425a818bb

Download Submit
memory/4984-0-0x00007FF887D13000-0x00007FF887D15000-memory.dmp

Filesize
8KB

Download
memory/4984-1-0x00000000004B0000-0x00000000004C8000-memory.dmp

Filesize
96KB

Download
memory/4984-3-0x00007FF887D10000-0x00007FF8887D1000-memory.dmp

Filesize
10.8MB

Download
memory/4984-8-0x00007FF887D10000-0x00007FF8887D1000-memory.dmp

Filesize
10.8MB

Download
memory/4984-9-0x00007FF887D10000-0x00007FF8887D1000-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