asyncrat | 375c43c645f68b4ee517958f959233dd55a108408a961e6e74bc901bf691494d | Triage

Resubmissions

23-05-2024 14:41

240523-r2kc1aef4v 10

Analysis

max time kernel
300s
max time network
296s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 14:41

Sharing

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General

Target

3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
Size

74KB
MD5

7ac0adf482250172280defec7a7054da
SHA1

20a25f0da68c309d062c4628ead8b6f377ac7969
SHA256

3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5
SHA512

d03d033b931f3d39f95a1ec1cdc7d9014783f11b2438c265dd72c0bc34f9d5ced534a38c7c1c88ff930868fd9cf60521dd556b5c486c5cf364f798f39215a1aa
SSDEEP

1536:WUxQcxHCapCtGPMVCe9VdQuDI6H1bf/yBZUu7QzciLVclN:WUOcxHCoeGPMVCe9VdQsH1bfqvUwQzBY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

66.235.168.242:4449

Mutex

scgofjarww

Attributes

delay
1
install
true
install_file
Loader.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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Loader.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

Loader.exe

pid process

2660 Loader.exe
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
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

Processes:

schtasks.exe

pid process

2728 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2792 timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exeLoader.exe

pid	process
2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe
2660	Loader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exeLoader.exe

description	pid	process
Token: SeDebugPrivilege	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
Token: SeDebugPrivilege	2660	Loader.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Loader.exe

pid process

2660 Loader.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.execmd.execmd.exe

description	pid	process	target process
PID 2416 wrote to memory of 2104	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	cmd.exe
PID 2416 wrote to memory of 2104	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	cmd.exe
PID 2416 wrote to memory of 2104	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	cmd.exe
PID 2416 wrote to memory of 3000	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	cmd.exe
PID 2416 wrote to memory of 3000	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	cmd.exe
PID 2416 wrote to memory of 3000	2416	3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe	cmd.exe
PID 2104 wrote to memory of 2728	2104	cmd.exe	schtasks.exe
PID 2104 wrote to memory of 2728	2104	cmd.exe	schtasks.exe
PID 2104 wrote to memory of 2728	2104	cmd.exe	schtasks.exe
PID 3000 wrote to memory of 2792	3000	cmd.exe	timeout.exe
PID 3000 wrote to memory of 2792	3000	cmd.exe	timeout.exe
PID 3000 wrote to memory of 2792	3000	cmd.exe	timeout.exe
PID 3000 wrote to memory of 2660	3000	cmd.exe	Loader.exe
PID 3000 wrote to memory of 2660	3000	cmd.exe	Loader.exe
PID 3000 wrote to memory of 2660	3000	cmd.exe	Loader.exe

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\3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe
"C:\Users\Admin\AppData\Local\Temp\3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2416

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Loader" /tr '"C:\Users\Admin\AppData\Roaming\Loader.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2104

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Loader" /tr '"C:\Users\Admin\AppData\Roaming\Loader.exe"'
3⤵
- Creates scheduled task(s)
PID:2728

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp27FA.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3000

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:2792

C:\Users\Admin\AppData\Roaming\Loader.exe
"C:\Users\Admin\AppData\Roaming\Loader.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2660

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab3C57.tmp
Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar4F0F.tmp
Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp27FA.tmp.bat
Filesize
150B

MD5
97feb6002a04c77caee76303aed1d692

SHA1
f63291d6dcf30512191415e0c4e344cd1fe35351

SHA256
fea1e4b83dc467325f17a6d531a826c4e53494b7186da397b4d555eaf36cbcae

SHA512
a2a53b63177020a395bf5d47c644bf7da38d2cecbacd9d437dc483c0c9e68b13c9de4999d13604ca6fbbea3461f93081b86891968745e9591f87cdb0545238af

Download Submit
C:\Users\Admin\AppData\Roaming\Loader.exe
Filesize
74KB

MD5
7ac0adf482250172280defec7a7054da

SHA1
20a25f0da68c309d062c4628ead8b6f377ac7969

SHA256
3caa5f06008365fbecf46198744793c36c42309b49a6324bebe8123be10f87d5

SHA512
d03d033b931f3d39f95a1ec1cdc7d9014783f11b2438c265dd72c0bc34f9d5ced534a38c7c1c88ff930868fd9cf60521dd556b5c486c5cf364f798f39215a1aa

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/2416-0-0x000007FEF5FB3000-0x000007FEF5FB4000-memory.dmp

Filesize
4KB

Download
memory/2416-1-0x0000000001090000-0x00000000010A8000-memory.dmp

Filesize
96KB

Download
memory/2416-3-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2416-12-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2416-13-0x000007FEF5FB0000-0x000007FEF699C000-memory.dmp

Filesize
9.9MB

Download
memory/2660-18-0x00000000008C0000-0x00000000008D8000-memory.dmp

Filesize
96KB

Download