asyncrat | 2f008e82dff5d835237221d923e390e7e8d32a3e77f7a417c2713601522738c1

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-12-2024 04:32

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General

Target

APKYUPOKSJ09HJSA.exe
Size

300.0MB
MD5

4c831c9d698ae1c40d99156135de269d
SHA1

f8308ea93ea6b570d047a732c5ad4bc47e74c8a4
SHA256

d99baa8c9a2503d5f423797042bbde745379f275d174d009763d09b987edd9ba
SHA512

d8215059d6d9baa59da9f10d0c70bbb83e35de0e629ef04b6fa2602bf8c8541cd2dc11a88b9b4f37bc7dfdba8f026b2f8f1cba0b55a16f46d512286d00b1b27f
SSDEEP

3072:1Vb72u+TCMkA6o7UdwOI5AD9OKbTBOUEs64BRg40nPFblFTJ:nbqu+TsA6eUdTISx1PBUeBRgPlh

Score

10^/10

asyncrat venom clients discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT 5.0.4

Botnet

Venom Clients

bbiy00362.duckdns.org:6731

Mutex

Venom_RAT_HVNC_Mutex_Venom RAT_HVNC

Attributes

delay
1
install
false
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

Checks computer location settings 2 TTPs 2 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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	APKYUPOKSJ09HJSA.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	yrtf.exe

Executes dropped EXE 2 IoCs

pid	Process
3500	yrtf.exe
3796	yrtf.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 832 set thread context of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 3500 set thread context of 2368	3500	yrtf.exe	101

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
4360	schtasks.exe
4060	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1956	RegAsm.exe
Token: SeDebugPrivilege	2368	RegAsm.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 832 wrote to memory of 3136	832	APKYUPOKSJ09HJSA.exe	89
PID 832 wrote to memory of 3136	832	APKYUPOKSJ09HJSA.exe	89
PID 832 wrote to memory of 4272	832	APKYUPOKSJ09HJSA.exe	91
PID 832 wrote to memory of 4272	832	APKYUPOKSJ09HJSA.exe	91
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 832 wrote to memory of 1956	832	APKYUPOKSJ09HJSA.exe	93
PID 3136 wrote to memory of 4060	3136	cmd.exe	94
PID 3136 wrote to memory of 4060	3136	cmd.exe	94
PID 3500 wrote to memory of 5052	3500	yrtf.exe	97
PID 3500 wrote to memory of 5052	3500	yrtf.exe	97
PID 3500 wrote to memory of 2892	3500	yrtf.exe	99
PID 3500 wrote to memory of 2892	3500	yrtf.exe	99
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 3500 wrote to memory of 2368	3500	yrtf.exe	101
PID 5052 wrote to memory of 4360	5052	cmd.exe	102
PID 5052 wrote to memory of 4360	5052	cmd.exe	102

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\APKYUPOKSJ09HJSA.exe
"C:\Users\Admin\AppData\Local\Temp\APKYUPOKSJ09HJSA.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:832
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\yrtf.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3136
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\yrtf.exe'" /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4060
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\APKYUPOKSJ09HJSA.exe" "C:\Users\Admin\AppData\Roaming\yrtf.exe"
  2⤵
  PID:4272
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1956

C:\Users\Admin\AppData\Roaming\yrtf.exe
C:\Users\Admin\AppData\Roaming\yrtf.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3500
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\yrtf.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5052
- - C:\Windows\system32\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafdnasia" /tr "'C:\Users\Admin\AppData\Roaming\yrtf.exe'" /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4360
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C copy "C:\Users\Admin\AppData\Roaming\yrtf.exe" "C:\Users\Admin\AppData\Roaming\yrtf.exe"
  2⤵
  PID:2892
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2368

C:\Users\Admin\AppData\Roaming\yrtf.exe
C:\Users\Admin\AppData\Roaming\yrtf.exe
1⤵
- Executes dropped EXE
PID:3796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\yrtf.exe.log

Filesize
859B

MD5
e204f3d12abd1691ce1f149399441188

SHA1
798042095539abfe857e456fca4e1035f67d29bf

SHA256
685f70bf685f654651dcd0acc495b6f52f02f73cc3ca8b3d2c8433aac9ba144d

SHA512
804c5ea57a59f86fd0c34479be4c479230bff79093548e8461758829928969da565c211ccc9cb9befa0fef15f0400a5b1f17d5ddf88aef6ff01b67a191176b9f

Download Submit
memory/832-0-0x00007FFC76913000-0x00007FFC76915000-memory.dmp

Filesize
8KB

Download
memory/832-1-0x00000000002A0000-0x00000000002C4000-memory.dmp

Filesize
144KB

Download
memory/832-2-0x00007FFC76913000-0x00007FFC76915000-memory.dmp

Filesize
8KB

Download
memory/832-3-0x00007FFC76910000-0x00007FFC773D1000-memory.dmp

Filesize
10.8MB

Download
memory/832-6-0x00007FFC76910000-0x00007FFC773D1000-memory.dmp

Filesize
10.8MB

Download
memory/1956-9-0x0000000000750000-0x0000000000766000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads