asyncrat | 8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861

Analysis

max time kernel
146s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 01:33

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General

Target
8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
Size 240KB
Sample240430-byjpasgd85
SHA256 8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861
MD5 0d7c259c157208ed087de127e9759687
SHA1 d66ed5ad63438425dd7029a109983125cb9db318
SHA512 1e73abe780e5cc2c33989302ce482345442e530f33c662fe30fb3dd35f4983d7d84538cba1aff6a4d933cbae3a834eae47b809e69084aacdbb0fce2fef2c6066
SSDEEP 3072:BhdhA9UeInbpphsvrlfKuEZCRLDQRULaGpwYuzKZRdp19a/XuJeDP1PBb1oW1:cdE8sCRLDKULa7zKbdn/q+W
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat cato rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

cato

216.250.252.159:50545

Mutex

swetnesss

Attributes

delay
1
install
true
install_file
chrome.axe.exe
install_folder
%AppData%

aes.plain

Signatures

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

Detects executables attemping to enumerate video devices using WMI 1 IoCs

resource	yara_rule
behavioral2/memory/3108-7-0x0000000000820000-0x0000000000838000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice

Detects executables packed with SmartAssembly 2 IoCs

resource	yara_rule
behavioral2/memory/4268-0-0x0000000000A70000-0x0000000000AB2000-memory.dmp	INDICATOR_EXE_Packed_SmartAssembly
behavioral2/files/0x0012000000023a14-18.dat	INDICATOR_EXE_Packed_SmartAssembly

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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe

Executes dropped EXE 2 IoCs

pid	Process
5012	chrome.axe.exe
3208	chrome.axe.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4268 set thread context of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 5012 set thread context of 3208	5012	chrome.axe.exe	95

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
3640	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1964	timeout.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
3208	chrome.axe.exe
3208	chrome.axe.exe
3208	chrome.axe.exe
3208	chrome.axe.exe
3208	chrome.axe.exe
3208	chrome.axe.exe
3208	chrome.axe.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
Token: SeDebugPrivilege	3208	chrome.axe.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3208	chrome.axe.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 4268 wrote to memory of 3108	4268	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	84
PID 3108 wrote to memory of 1644	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	88
PID 3108 wrote to memory of 1644	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	88
PID 3108 wrote to memory of 1644	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	88
PID 3108 wrote to memory of 3148	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	90
PID 3108 wrote to memory of 3148	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	90
PID 3108 wrote to memory of 3148	3108	8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe	90
PID 1644 wrote to memory of 3640	1644	cmd.exe	92
PID 1644 wrote to memory of 3640	1644	cmd.exe	92
PID 1644 wrote to memory of 3640	1644	cmd.exe	92
PID 3148 wrote to memory of 1964	3148	cmd.exe	93
PID 3148 wrote to memory of 1964	3148	cmd.exe	93
PID 3148 wrote to memory of 1964	3148	cmd.exe	93
PID 3148 wrote to memory of 5012	3148	cmd.exe	94
PID 3148 wrote to memory of 5012	3148	cmd.exe	94
PID 3148 wrote to memory of 5012	3148	cmd.exe	94
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95
PID 5012 wrote to memory of 3208	5012	chrome.axe.exe	95

C:\Users\Admin\AppData\Local\Temp\8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
"C:\Users\Admin\AppData\Local\Temp\8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4268
- C:\Users\Admin\AppData\Local\Temp\8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe
  "C:\Users\Admin\AppData\Local\Temp\8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3108
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "chrome.axe" /tr '"C:\Users\Admin\AppData\Roaming\chrome.axe.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1644
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "chrome.axe" /tr '"C:\Users\Admin\AppData\Roaming\chrome.axe.exe"'
      4⤵
      Creates scheduled task(s)
      PID:3640
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4ECC.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3148
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1964
  - - C:\Users\Admin\AppData\Roaming\chrome.axe.exe
      "C:\Users\Admin\AppData\Roaming\chrome.axe.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:5012
    - - C:\Users\Admin\AppData\Roaming\chrome.axe.exe
        
        "C:\Users\Admin\AppData\Roaming\chrome.axe.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:3208

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

Exfiltration

Impact

Replay Monitor

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Downloads

8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861.exe.log
Size 520B
SHA256 5164770a37b199a79ccd23b399bb3309228973d9f74c589bc2623dc613b37ac4
MD5 03febbff58da1d3318c31657d89c8542
SHA1 c9e017bd9d0a4fe533795b227c855935d86c2092
SHA512 3750c372bbca1892e9c1b34681d592c693e725a8b149c3d6938079cd467628cec42c4293b0d886b57a786abf45f5e7229247b3445001774e3e793ff5a3accfa3
MD5 SHA1 SHA512

Submit Download

tmp4ECC.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4ECC.tmp.bat
Size 154B
SHA256 1484e26b1b257e8bde579cc239fef00185a31b48f4a97e7c60b255fb92cccc2a
MD5 6fcbdabee9349686b3477358f92bf857
SHA1 ae9cb030d9a9676d0b1c9d2d058dc2e0989421b8
SHA512 a259f23a9cc4e62b9f3d3dac1a8998eb4a2317a2ec4831ea33de3f479fabe8b7e74fc1158042624fab0a930aec38f8f53c5805100ae5e44969c8d7fe41099d9e
MD5 SHA1 SHA512

Submit Download

DataLogs.conf

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

Submit Download

chrome.axe.exe

Path C:\Users\Admin\AppData\Roaming\chrome.axe.exe
Size 240KB
SHA256 8259eff22466f7ef35455edda25db31de7334666d4e7bce013c898a3777b4861
MD5 0d7c259c157208ed087de127e9759687
SHA1 d66ed5ad63438425dd7029a109983125cb9db318
SHA512 1e73abe780e5cc2c33989302ce482345442e530f33c662fe30fb3dd35f4983d7d84538cba1aff6a4d933cbae3a834eae47b809e69084aacdbb0fce2fef2c6066
SSDEEP 3072:BhdhA9UeInbpphsvrlfKuEZCRLDQRULaGpwYuzKZRdp19a/XuJeDP1PBb1oW1:cdE8sCRLDKULa7zKbdn/q+W
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3108-10-0x0000000004D50000-0x0000000004D60000-memory.dmp

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memory/3108-7-0x0000000000820000-0x0000000000838000-memory.dmp

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memory/3108-8-0x0000000074F70000-0x0000000075720000-memory.dmp

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memory/3108-11-0x0000000077A71000-0x0000000077A72000-memory.dmp

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memory/3108-15-0x0000000074F70000-0x0000000075720000-memory.dmp

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memory/3208-25-0x0000000005B90000-0x0000000005C22000-memory.dmp

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memory/3208-26-0x0000000005B60000-0x0000000005B6A000-memory.dmp

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memory/4268-6-0x0000000074F70000-0x0000000075720000-memory.dmp

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memory/4268-0-0x0000000000A70000-0x0000000000AB2000-memory.dmp

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memory/4268-3-0x00000000054B0000-0x00000000054C0000-memory.dmp

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memory/4268-2-0x0000000005A70000-0x0000000006014000-memory.dmp

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memory/4268-1-0x0000000074F70000-0x0000000075720000-memory.dmp

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