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
behavioral1/files/0x0009000000018669-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2724	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
2376	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

defense_evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	System.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	System.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
768	schtasks.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
1728	ONEFix.exe
1728	ONEFix.exe
1728	ONEFix.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe
2724	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	ONEFix.exe
Token: SeDebugPrivilege	2724	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2724	System.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 2244	1728	ONEFix.exe	31
PID 1728 wrote to memory of 2244	1728	ONEFix.exe	31
PID 1728 wrote to memory of 2244	1728	ONEFix.exe	31
PID 1728 wrote to memory of 1656	1728	ONEFix.exe	32
PID 1728 wrote to memory of 1656	1728	ONEFix.exe	32
PID 1728 wrote to memory of 1656	1728	ONEFix.exe	32
PID 2244 wrote to memory of 768	2244	cmd.exe	35
PID 2244 wrote to memory of 768	2244	cmd.exe	35
PID 2244 wrote to memory of 768	2244	cmd.exe	35
PID 1656 wrote to memory of 2376	1656	cmd.exe	36
PID 1656 wrote to memory of 2376	1656	cmd.exe	36
PID 1656 wrote to memory of 2376	1656	cmd.exe	36
PID 1656 wrote to memory of 2724	1656	cmd.exe	37
PID 1656 wrote to memory of 2724	1656	cmd.exe	37
PID 1656 wrote to memory of 2724	1656	cmd.exe	37

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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728
- 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:2244
- - 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:768
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD614.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1656
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2376
- - C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    3⤵
    - Executes dropped EXE
    - Modifies system certificate store
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2724

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

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD614.tmp.bat

Filesize
150B

MD5
d7f4368fb70bddcd68ade9aa6c5c5125

SHA1
a65b10b31084d9029283a24b34247d91590bd6fa

SHA256
676a7b53caa168f31766bc9879d29ef1e90677938d6ac25ff3a38aa6c34c9c5b

SHA512
f0001f0e21f353832debae61ae0a20b3dceeaa257fbfdfa463bdd53940ddb6876f9c19af98bead811e521bccac46373e4df6004b18d98fe605c94e8a409e7bb1

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/1728-0-0x000007FEF5FD3000-0x000007FEF5FD4000-memory.dmp

Filesize
4KB

Download
memory/1728-1-0x00000000009A0000-0x00000000009B8000-memory.dmp

Filesize
96KB

Download
memory/1728-3-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-12-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/1728-14-0x000007FEF5FD0000-0x000007FEF69BC000-memory.dmp

Filesize
9.9MB

Download
memory/2724-18-0x0000000000B80000-0x0000000000B98000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads