asyncrat | 3d0b19a62038f874efce6e1286a7d591c43935c14e9b9f4cd7a94901fc17cdcb

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
20-07-2024 18:25

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General

Target

Debug/Updater.exe
Size

74KB
MD5

6a573caf7b6f745e3113b602cc67db13
SHA1

1068547d9db8ba426e6dc9f5f5c7989873eeb3d1
SHA256

3ffae8507d10a4e66855339335a797343dcc19c6a8f48314bc678d03f06bb115
SHA512

badd9cbe3819c87b6cd3da58265e98d4f1f270e80d44589c70f6c9c7542199286a9b4c2b60462e1cb48ae85a2d79d89199b01332f6c797bd1bf54f862da3e2ec
SSDEEP

1536:lUPkcx5v/5CxSPMV6e9VdQuDI6H1bf/s/NQzc2LVclN:lUMcx5vx2SPMV6e9VdQsH1bfAQPBY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

127.0.0.1:9090

127.0.0.1:27853

147.185.221.20:9090

147.185.221.20:27853

Mutex

otjnojdxtcgqahud

Attributes

delay
1
install
true
install_file
DustyV1.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
behavioral15/files/0x0008000000015e46-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2736	DustyV1.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
2996	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
2244	schtasks.exe

Suspicious behavior: EnumeratesProcesses 37 IoCs

pid	Process
2204	Updater.exe
2204	Updater.exe
2204	Updater.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe
2736	DustyV1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	Updater.exe
Token: SeDebugPrivilege	2736	DustyV1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2736	DustyV1.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 3068	2204	Updater.exe	30
PID 2204 wrote to memory of 3068	2204	Updater.exe	30
PID 2204 wrote to memory of 3068	2204	Updater.exe	30
PID 2204 wrote to memory of 3028	2204	Updater.exe	32
PID 2204 wrote to memory of 3028	2204	Updater.exe	32
PID 2204 wrote to memory of 3028	2204	Updater.exe	32
PID 3028 wrote to memory of 2996	3028	cmd.exe	35
PID 3028 wrote to memory of 2996	3028	cmd.exe	35
PID 3028 wrote to memory of 2996	3028	cmd.exe	35
PID 3068 wrote to memory of 2244	3068	cmd.exe	36
PID 3068 wrote to memory of 2244	3068	cmd.exe	36
PID 3068 wrote to memory of 2244	3068	cmd.exe	36
PID 3028 wrote to memory of 2736	3028	cmd.exe	37
PID 3028 wrote to memory of 2736	3028	cmd.exe	37
PID 3028 wrote to memory of 2736	3028	cmd.exe	37

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\Debug\Updater.exe
"C:\Users\Admin\AppData\Local\Temp\Debug\Updater.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "DustyV1" /tr '"C:\Users\Admin\AppData\Roaming\DustyV1.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "DustyV1" /tr '"C:\Users\Admin\AppData\Roaming\DustyV1.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2244
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC8DB.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3028
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2996
- - C:\Users\Admin\AppData\Roaming\DustyV1.exe
    "C:\Users\Admin\AppData\Roaming\DustyV1.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2736

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabFD83.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar1089.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC8DB.tmp.bat

Filesize
151B

MD5
823d17b1396a42fe71ad3b9b7951a80a

SHA1
a9c2fd5260df463fed0810ad0889c049cd2833eb

SHA256
ae69d6adcbaeecf8a5feac6bb626d964e3c8b57a65e42c78ace947e3c19fb63d

SHA512
a7745b521a17ae104d9481523714f82ed3a37fe415d6e102218bb0e43e5943c7a6d7773c2fbd9e018ec34d2325ab175c60a9e166a4cad1ca12c233437d0afc2b

Download Submit
C:\Users\Admin\AppData\Roaming\DustyV1.exe

Filesize
74KB

MD5
6a573caf7b6f745e3113b602cc67db13

SHA1
1068547d9db8ba426e6dc9f5f5c7989873eeb3d1

SHA256
3ffae8507d10a4e66855339335a797343dcc19c6a8f48314bc678d03f06bb115

SHA512
badd9cbe3819c87b6cd3da58265e98d4f1f270e80d44589c70f6c9c7542199286a9b4c2b60462e1cb48ae85a2d79d89199b01332f6c797bd1bf54f862da3e2ec

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/2204-0-0x000007FEF5B73000-0x000007FEF5B74000-memory.dmp

Filesize
4KB

Download
memory/2204-1-0x00000000013B0000-0x00000000013C8000-memory.dmp

Filesize
96KB

Download
memory/2204-3-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-13-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-14-0x000007FEF5B70000-0x000007FEF655C000-memory.dmp

Filesize
9.9MB

Download
memory/2736-18-0x00000000012F0000-0x0000000001308000-memory.dmp

Filesize
96KB

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