asyncrat | abbdc590c5f9262631a281d065561cf3621181248e7c8de4d348e573d8cd6e0f

General

Target
123.exe
Size 74KB
Sample240503-dd7xhafe26
SHA256 abbdc590c5f9262631a281d065561cf3621181248e7c8de4d348e573d8cd6e0f
MD5 74108e906608e6ad22c6200c96505dc4
SHA1 f7e81df5b579c92bd2cb6a631a4dbc65a3f1fe91
SHA512 375f9eb1cc042cb78afe734e9507b8567cc0d22e8f9fb3af47fd1fbb86adbda3d59fe681cae9edeed43f5f2ddd0b760103ea0684313bdcc3246e30e4304bb971
SSDEEP 1536:cApUzgcxG8JCjWPMVh4koVBYYYHYYYYYYYYYZqYFYY6MYY99bzYYtBSI+H1bQ/Zg:cSUkcxGaQWPMVhDoOH1bQxrAQvBY
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

C2

209.25.140.1:42550
127.0.0.142:42550

Attributes

delay
1
install
true
install_file
test.exe
install_folder
%AppData%

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/files/0x0007000000023262-12.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	123.exe

Executes dropped EXE 1 IoCs

pid	Process
2068	test.exe

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
1336	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2108	timeout.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
4860	123.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe
2068	test.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4860	123.exe
Token: SeDebugPrivilege	2068	test.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2068	test.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 4080	4860	123.exe	91
PID 4860 wrote to memory of 4080	4860	123.exe	91
PID 4860 wrote to memory of 64	4860	123.exe	93
PID 4860 wrote to memory of 64	4860	123.exe	93
PID 4080 wrote to memory of 1336	4080	cmd.exe	95
PID 4080 wrote to memory of 1336	4080	cmd.exe	95
PID 64 wrote to memory of 2108	64	cmd.exe	96
PID 64 wrote to memory of 2108	64	cmd.exe	96
PID 64 wrote to memory of 2068	64	cmd.exe	97
PID 64 wrote to memory of 2068	64	cmd.exe	97

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\123.exe
"C:\Users\Admin\AppData\Local\Temp\123.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4080
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1336
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp12D7.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:64
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2108
- - C:\Users\Admin\AppData\Roaming\test.exe
    "C:\Users\Admin\AppData\Roaming\test.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2068

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4036 --field-trial-handle=2676,i,447940133669489189,1353734109898858672,262144 --variations-seed-version /prefetch:8
1⤵
PID:1192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp12D7.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp12D7.tmp.bat
Size 148B
SHA256 7177edd7a22e9e5b593279ab1e2644a4e333209fe9f8418aacf41c4a2041c6f7
MD5 16770e2fe18bf67bb9b92b518a771756
SHA1 c30ea92aa49235a33ec878f68bb4b487141f8348
SHA512 f142988261be96f943a34c9e094392841e4c261b7ad58c2dc7e5409ec21a3e745edad90235888669486decbf8b2ed3c6a207cc42a2a69900a93d936b5a498913
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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test.exe

Path C:\Users\Admin\AppData\Roaming\test.exe
Size 74KB
SHA256 abbdc590c5f9262631a281d065561cf3621181248e7c8de4d348e573d8cd6e0f
MD5 74108e906608e6ad22c6200c96505dc4
SHA1 f7e81df5b579c92bd2cb6a631a4dbc65a3f1fe91
SHA512 375f9eb1cc042cb78afe734e9507b8567cc0d22e8f9fb3af47fd1fbb86adbda3d59fe681cae9edeed43f5f2ddd0b760103ea0684313bdcc3246e30e4304bb971
SSDEEP 1536:cApUzgcxG8JCjWPMVh4koVBYYYHYYYYYYYYYZqYFYY6MYY99bzYYtBSI+H1bQ/Zg:cSUkcxGaQWPMVhDoOH1bQxrAQvBY
MD5 SHA1 SHA512 SSDEEP

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memory/4860-0-0x00007FFC8CBB3000-0x00007FFC8CBB5000-memory.dmp

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memory/4860-1-0x0000000000130000-0x0000000000148000-memory.dmp

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memory/4860-3-0x00007FFC8CBB0000-0x00007FFC8D671000-memory.dmp

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memory/4860-8-0x00007FFC8CBB0000-0x00007FFC8D671000-memory.dmp

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memory/4860-9-0x00007FFC8CBB0000-0x00007FFC8D671000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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