asyncrat | 5e3758c19d761560431f8fd8302aa6d2061568cbed3dc0a20ad3d4f5da93a956

General

Target

Client.exe
Size

114KB
MD5

29e928f1f16131ca36a3aae3467141de
SHA1

9b586f0d13236c3280e5b7b3b592309b296d7fff
SHA256

5e3758c19d761560431f8fd8302aa6d2061568cbed3dc0a20ad3d4f5da93a956
SHA512

3f4ab2b645ec82c9899061973edb92bc4ef4ef3663603dea0de3a37447b8b94577e1357f398bef02f1ce94260f53f25387de72d872a055d7a9482b1f1b256314
SSDEEP

3072:QUVcxhzVCiPMVSe9VdQsH1bf7ADzQL4KvYMC29TwaGwYSOeBY:QtCiPMVSaesVbUzaFzC2yK

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

127.0.0.1:6703

147.185.221.21:4449

147.185.221.21:6703

Mutex

uiagdedifgkrgllefg

Attributes

delay
1
install
true
install_file
dllhost.dat.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
behavioral1/files/0x0030000000016d43-17.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2780	dllhost.dat.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2816	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
2768	schtasks.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2244	Client.exe
2244	Client.exe
2244	Client.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe
2780	dllhost.dat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	Client.exe
Token: SeDebugPrivilege	2780	dllhost.dat.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2780	dllhost.dat.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2836	2244	Client.exe	30
PID 2244 wrote to memory of 2836	2244	Client.exe	30
PID 2244 wrote to memory of 2836	2244	Client.exe	30
PID 2244 wrote to memory of 2852	2244	Client.exe	32
PID 2244 wrote to memory of 2852	2244	Client.exe	32
PID 2244 wrote to memory of 2852	2244	Client.exe	32
PID 2836 wrote to memory of 2768	2836	cmd.exe	34
PID 2836 wrote to memory of 2768	2836	cmd.exe	34
PID 2836 wrote to memory of 2768	2836	cmd.exe	34
PID 2852 wrote to memory of 2816	2852	cmd.exe	35
PID 2852 wrote to memory of 2816	2852	cmd.exe	35
PID 2852 wrote to memory of 2816	2852	cmd.exe	35
PID 2852 wrote to memory of 2780	2852	cmd.exe	36
PID 2852 wrote to memory of 2780	2852	cmd.exe	36
PID 2852 wrote to memory of 2780	2852	cmd.exe	36

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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost.dat" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dllhost.dat" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2768
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8A07.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2852
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2816
- - C:\Users\Admin\AppData\Roaming\dllhost.dat.exe
    "C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8A07.tmp.bat

Filesize
155B

MD5
8f35c0acf0dcebb3614f32359c60146d

SHA1
5c78b26ba2f0786f9493d0d766f88bee7389e3c1

SHA256
ca2c886011ef77427b994559d38bfdc2fd87464d425af124d4a778ddddd90385

SHA512
ceabc05e2101fdd97d101c98e29f674eed77b17bf5f9873db2796cb47a288e1dff490b197e9ec099181026c6600d823491b0201c0467ad22b64727b390d012f7

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\dllhost.dat.exe

Filesize
114KB

MD5
29e928f1f16131ca36a3aae3467141de

SHA1
9b586f0d13236c3280e5b7b3b592309b296d7fff

SHA256
5e3758c19d761560431f8fd8302aa6d2061568cbed3dc0a20ad3d4f5da93a956

SHA512
3f4ab2b645ec82c9899061973edb92bc4ef4ef3663603dea0de3a37447b8b94577e1357f398bef02f1ce94260f53f25387de72d872a055d7a9482b1f1b256314

Download Submit
memory/2244-0-0x000007FEF5753000-0x000007FEF5754000-memory.dmp

Filesize
4KB

Download
memory/2244-1-0x0000000000C00000-0x0000000000C22000-memory.dmp

Filesize
136KB

Download
memory/2244-3-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-12-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-13-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/2780-18-0x00000000008C0000-0x00000000008E2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads