asyncrat | 65243b382e3bf268cf0bbcf584c835d96afc503f3c0b2731183c0ce3df25f892

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 12:08

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General

Target
eee.exe
Size 342KB
Sample240429-pa5hraaa63
SHA256 65243b382e3bf268cf0bbcf584c835d96afc503f3c0b2731183c0ce3df25f892
MD5 da56ab3dd2b92588f75aa2d75bf929ba
SHA1 e6295345fe55d1743526691dd304be7d1e893afb
SHA512 5b6dc2af57a067e273e0c58269f9f3e49a7645b64401b97ae01bc5b687f2e94f22289d41f339a6595ffd37cb7573ec5c7d0f3e13ba36289b5ced0fb18350f20f
SSDEEP 6144:MQhiWeJL9jaNAuhzxgS/0dkxsejRTGRvV+H:MQh8D4AuxHuWsotGRN+
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

hlcdwlfosssonxtzfkj

Attributes

delay
1
install
true
install_file
new.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/XV69qkyV

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/2228-3-0x0000021112090000-0x00000211120A8000-memory.dmp	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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	eee.exe

Executes dropped EXE 1 IoCs

pid	Process
1428	new.exe

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

Web Service

T1102

flow	ioc
24	pastebin.com
25	pastebin.com

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

pid	Process
1220	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
8	timeout.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

pid	Process
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
2228	eee.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe
1428	new.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	eee.exe
Token: SeDebugPrivilege	1428	new.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1428	new.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 1164	2228	eee.exe	84
PID 2228 wrote to memory of 1164	2228	eee.exe	84
PID 2228 wrote to memory of 4796	2228	eee.exe	88
PID 2228 wrote to memory of 4796	2228	eee.exe	88
PID 2228 wrote to memory of 4852	2228	eee.exe	90
PID 2228 wrote to memory of 4852	2228	eee.exe	90
PID 4852 wrote to memory of 8	4852	cmd.exe	93
PID 4852 wrote to memory of 8	4852	cmd.exe	93
PID 4796 wrote to memory of 1220	4796	cmd.exe	92
PID 4796 wrote to memory of 1220	4796	cmd.exe	92
PID 4852 wrote to memory of 1428	4852	cmd.exe	98
PID 4852 wrote to memory of 1428	4852	cmd.exe	98
PID 1428 wrote to memory of 3256	1428	new.exe	100
PID 1428 wrote to memory of 3256	1428	new.exe	100

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\eee.exe
"C:\Users\Admin\AppData\Local\Temp\eee.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Windows\SYSTEM32\notepad.exe
  notepad.exe
  2⤵
  PID:1164
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "new" /tr '"C:\Users\Admin\AppData\Roaming\new.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4796
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "new" /tr '"C:\Users\Admin\AppData\Roaming\new.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1220
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4A28.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4852
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:8
- - C:\Users\Admin\AppData\Roaming\new.exe
    "C:\Users\Admin\AppData\Roaming\new.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1428
  - - C:\Windows\SYSTEM32\notepad.exe
      notepad.exe
      4⤵
      PID:3256

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

tmp4A28.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4A28.tmp.bat
Size 147B
SHA256 2ad041b453e683caf6f44da00fcc81d98e01a9a91a8ad9d3680a72ea7616cd57
MD5 abdda4652fe2862a0859bb5cd0c34f7c
SHA1 3ad9678176f6411ed0ecc4c4f7d0931a0cc86162
SHA512 489f4bef470ddec81c53784cc99d45ca2482e8cdcd88faf80a97d8973acfdd328067d507783e6b87916698a859bf81b306b856a122b21dd018e61f931337f3ba
MD5 SHA1 SHA512

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DataLogs.conf

Path C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Size 8B
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b
MD5 SHA1 SHA512

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new.exe

Path C:\Users\Admin\AppData\Roaming\new.exe
Size 342KB
SHA256 65243b382e3bf268cf0bbcf584c835d96afc503f3c0b2731183c0ce3df25f892
MD5 da56ab3dd2b92588f75aa2d75bf929ba
SHA1 e6295345fe55d1743526691dd304be7d1e893afb
SHA512 5b6dc2af57a067e273e0c58269f9f3e49a7645b64401b97ae01bc5b687f2e94f22289d41f339a6595ffd37cb7573ec5c7d0f3e13ba36289b5ced0fb18350f20f
SSDEEP 6144:MQhiWeJL9jaNAuhzxgS/0dkxsejRTGRvV+H:MQh8D4AuxHuWsotGRN+
MD5 SHA1 SHA512 SSDEEP

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memory/1428-20-0x00007FFDC8EF0000-0x00007FFDC90E5000-memory.dmp

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memory/2228-5-0x00007FFDAAEC0000-0x00007FFDAB981000-memory.dmp

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memory/2228-7-0x000002112AAD0000-0x000002112AAE0000-memory.dmp

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memory/2228-6-0x000002112AAD0000-0x000002112AAE0000-memory.dmp

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memory/2228-14-0x00007FFDC8EF0000-0x00007FFDC90E5000-memory.dmp

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memory/2228-15-0x00007FFDAAEC0000-0x00007FFDAB981000-memory.dmp

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memory/2228-8-0x000002112AAD0000-0x000002112AAE0000-memory.dmp

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memory/2228-1-0x00000211106B0000-0x00000211106CC000-memory.dmp

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memory/2228-3-0x0000021112090000-0x00000211120A8000-memory.dmp

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memory/2228-0-0x00007FFDC8EF0000-0x00007FFDC90E5000-memory.dmp

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