asyncrat | b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde

Analysis

max time kernel
146s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
18-08-2024 18:57

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General

Target

b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
Size

74KB
MD5

6c9944b8a88b29b1b09f66f7e0b246a0
SHA1

d3a0a1dd2908321d2086b236d4a8411f11e6e574
SHA256

b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde
SHA512

1d129611ec5000a841a462305649afdd6a9ea1c4ccfe790cdde2a1244c5994e349f1ad01ead0f5db4521c98efd8c0b65f16cf9459b9bb57586c227f276a34b56
SSDEEP

1536:9UHNwcxKHXwzCtmPMV2e9VdQuDI6H1bf/l8wIKQzca7VclN:9UHicxK8WmPMV2e9VdQsH1bfN8eQrxY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

Mutex

fkmfvhqhbwrdv

Attributes

delay
1
install
true
install_file
111222.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/LwwcrLg4

aes.plain

Signatures

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

VenomRAT 2 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral2/memory/4844-1-0x0000000000340000-0x0000000000358000-memory.dmp	VenomRAT
behavioral2/files/0x000c00000001e4f6-13.dat	VenomRAT

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000c00000001e4f6-13.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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe

Executes dropped EXE 1 IoCs

pid	Process
2500	111222.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
25	pastebin.com
26	pastebin.com

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 6 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	111222.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2656	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
3844	schtasks.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

pid	Process
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe
2500	111222.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
Token: SeDebugPrivilege	2500	111222.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2500	111222.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 1184	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe	87
PID 4844 wrote to memory of 1184	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe	87
PID 4844 wrote to memory of 1184	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe	87
PID 4844 wrote to memory of 1328	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe	89
PID 4844 wrote to memory of 1328	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe	89
PID 4844 wrote to memory of 1328	4844	b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe	89
PID 1328 wrote to memory of 2656	1328	cmd.exe	91
PID 1328 wrote to memory of 2656	1328	cmd.exe	91
PID 1328 wrote to memory of 2656	1328	cmd.exe	91
PID 1184 wrote to memory of 3844	1184	cmd.exe	92
PID 1184 wrote to memory of 3844	1184	cmd.exe	92
PID 1184 wrote to memory of 3844	1184	cmd.exe	92
PID 1328 wrote to memory of 2500	1328	cmd.exe	95
PID 1328 wrote to memory of 2500	1328	cmd.exe	95
PID 1328 wrote to memory of 2500	1328	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe
"C:\Users\Admin\AppData\Local\Temp\b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "111222" /tr '"C:\Users\Admin\AppData\Roaming\111222.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1184
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "111222" /tr '"C:\Users\Admin\AppData\Roaming\111222.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3844
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp97CB.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1328
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2656
- - C:\Users\Admin\AppData\Roaming\111222.exe
    "C:\Users\Admin\AppData\Roaming\111222.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2500

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp97CB.tmp.bat

Filesize
150B

MD5
8aff1f47c0603006d2825f96adcc8f04

SHA1
1daad576519430392e94f62e607d3e7217fae994

SHA256
122124aa68697d960dec62b1e25a036b11102175b9afa326cd5a3631b6224e97

SHA512
f3f66108a25a55eb7c45ce04d8677fae140c37f95488fb82a982f2ad8ea1dcba30eab000a614253844bcc80b7c8222a8e95011a60a517c161a277e36d4173025

Download Submit
C:\Users\Admin\AppData\Roaming\111222.exe

Filesize
74KB

MD5
6c9944b8a88b29b1b09f66f7e0b246a0

SHA1
d3a0a1dd2908321d2086b236d4a8411f11e6e574

SHA256
b01f8abc812a17b3fe0a6dd06b9dfc2f99a153dad1a8e3e325fab7f95bf78cde

SHA512
1d129611ec5000a841a462305649afdd6a9ea1c4ccfe790cdde2a1244c5994e349f1ad01ead0f5db4521c98efd8c0b65f16cf9459b9bb57586c227f276a34b56

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/2500-15-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/2500-17-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/2500-18-0x0000000005100000-0x0000000005192000-memory.dmp

Filesize
584KB

Download
memory/2500-19-0x00000000050E0000-0x00000000050EA000-memory.dmp

Filesize
40KB

Download
memory/2500-20-0x00000000744E0000-0x0000000074C90000-memory.dmp

Filesize
7.7MB

Download
memory/4844-4-0x00000000744F0000-0x0000000074CA0000-memory.dmp

Filesize
7.7MB

Download
memory/4844-5-0x00000000744F0000-0x0000000074CA0000-memory.dmp

Filesize
7.7MB

Download
memory/4844-10-0x00000000744F0000-0x0000000074CA0000-memory.dmp

Filesize
7.7MB

Download
memory/4844-2-0x0000000005500000-0x0000000005AA4000-memory.dmp

Filesize
5.6MB

Download
memory/4844-1-0x0000000000340000-0x0000000000358000-memory.dmp

Filesize
96KB

Download
memory/4844-0-0x00000000744FE000-0x00000000744FF000-memory.dmp

Filesize
4KB

Download