asyncrat | 8583a10e3990a1a9f00e443c1d39351c69899cff0a902c83e673d233a1467662

General

Target

creative sound blaster.exe
Size

272KB
MD5

216065e5d553615d2eb0b6cfe500955d
SHA1

77e8aa8c51aff504fa2570b802a2cfcefc4cbeb9
SHA256

8583a10e3990a1a9f00e443c1d39351c69899cff0a902c83e673d233a1467662
SHA512

ec5d0edc7d73337445d235b377e8556dd0ac608eaf641e4e711cec28c69fbcd18b239a05843d07f1cadd87ae7b0cb2f69ada5e6de4433a4d7f1c4971eb1b6a7e
SSDEEP

3072:cUTcxw+1uSPMV7b3SH1bnf8QYy9ckYMmlB/v6A80XH3e55EVu9cBY:cluSPMV7biVbEq5YM6VyA80XHbUe

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.21:6643

Mutex

ilfsqckarqvfvoxlq

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/0x0009000000016ccd-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2456	dllhost.dat.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2744	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
2344	schtasks.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2356	creative sound blaster.exe
2356	creative sound blaster.exe
2356	creative sound blaster.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe
2456	dllhost.dat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2356	creative sound blaster.exe
Token: SeDebugPrivilege	2456	dllhost.dat.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2456	dllhost.dat.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2356 wrote to memory of 2072	2356	creative sound blaster.exe	30
PID 2356 wrote to memory of 2072	2356	creative sound blaster.exe	30
PID 2356 wrote to memory of 2072	2356	creative sound blaster.exe	30
PID 2356 wrote to memory of 1096	2356	creative sound blaster.exe	32
PID 2356 wrote to memory of 1096	2356	creative sound blaster.exe	32
PID 2356 wrote to memory of 1096	2356	creative sound blaster.exe	32
PID 2072 wrote to memory of 2344	2072	cmd.exe	34
PID 2072 wrote to memory of 2344	2072	cmd.exe	34
PID 2072 wrote to memory of 2344	2072	cmd.exe	34
PID 1096 wrote to memory of 2744	1096	cmd.exe	35
PID 1096 wrote to memory of 2744	1096	cmd.exe	35
PID 1096 wrote to memory of 2744	1096	cmd.exe	35
PID 1096 wrote to memory of 2456	1096	cmd.exe	36
PID 1096 wrote to memory of 2456	1096	cmd.exe	36
PID 1096 wrote to memory of 2456	1096	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\creative sound blaster.exe
"C:\Users\Admin\AppData\Local\Temp\creative sound blaster.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2356
- 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:2072
- - 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:2344
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBDF2.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2744
- - 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:2456

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

2

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\CabD54B.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarEC95.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBDF2.tmp.bat

Filesize
155B

MD5
7e79a57b4a567453d629533f8af428b1

SHA1
3c4bed2232a83ab16836b8f17aa13bb53e69aa46

SHA256
844c50da4b26f547584eba33235807b8620d3946e48a75049d007b527fa8390f

SHA512
3c437dc16fa66caa11645f02c37a586132f9516fe86cf4d856e2da16b3e16369ab9c887ee01996f105b6ea4f1b9fff2603a9ddc8a44ab3c25a4c445acae19777

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
272KB

MD5
216065e5d553615d2eb0b6cfe500955d

SHA1
77e8aa8c51aff504fa2570b802a2cfcefc4cbeb9

SHA256
8583a10e3990a1a9f00e443c1d39351c69899cff0a902c83e673d233a1467662

SHA512
ec5d0edc7d73337445d235b377e8556dd0ac608eaf641e4e711cec28c69fbcd18b239a05843d07f1cadd87ae7b0cb2f69ada5e6de4433a4d7f1c4971eb1b6a7e

Download Submit
memory/2356-0-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

Filesize
4KB

Download
memory/2356-1-0x0000000000C70000-0x0000000000CBA000-memory.dmp

Filesize
296KB

Download
memory/2356-3-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2356-12-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2356-14-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2456-18-0x0000000000DE0000-0x0000000000E2A000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads