asyncrat | 3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc

Analysis

max time kernel
148s
max time network
18s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
18-08-2024 18:41

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General

Target

3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
Size

204KB
MD5

dfcfcd78d212140c3b087d315d5ed33b
SHA1

a3a5f02aa532c70f3452763ed6fbdfa03a7fac44
SHA256

3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc
SHA512

8dd40a9d957745926f519f97a03a5727f79f120477aa624e7f8f48d6b5275f6b45df4ee998868dd4ff738f9851a0aac32df13b1674ca528cdf5fefc731ed4da7
SSDEEP

3072:dURcxswS6PMVSsl3H1bNSGQNWwfBtOEp7ybMj/0vU7yZED+CDgbB+Y:d3S6PMVNVbR0W6mEpmbMjgU7yZf8

Score

10^/10

asyncrat rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Mutex

server.underground-cheat.xyz

Attributes

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

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

VenomRAT 3 IoCs

Detects VenomRAT.

rat

Processes:

resource	yara_rule
behavioral1/memory/2000-1-0x0000000000F70000-0x0000000000FA8000-memory.dmp	VenomRAT
behavioral1/files/0x002d000000019565-16.dat	VenomRAT
behavioral1/memory/2548-18-0x00000000010A0000-0x00000000010D8000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/files/0x002d000000019565-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

WinUpdate.exe

pid	Process
2548	WinUpdate.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

Processes:

timeout.exe

pid	Process
2764	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

Processes:

schtasks.exe

pid	Process
2712	schtasks.exe

Suspicious behavior: EnumeratesProcesses 52 IoCs

Processes:

3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exeWinUpdate.exe

pid	Process
2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe
2548	WinUpdate.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exeWinUpdate.exe

description	pid	Process
Token: SeDebugPrivilege	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
Token: SeDebugPrivilege	2548	WinUpdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

WinUpdate.exe

pid	Process
2548	WinUpdate.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.execmd.execmd.exe

description	pid	Process	procid_target
PID 2000 wrote to memory of 2668	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe	30
PID 2000 wrote to memory of 2668	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe	30
PID 2000 wrote to memory of 2668	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe	30
PID 2000 wrote to memory of 2748	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe	31
PID 2000 wrote to memory of 2748	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe	31
PID 2000 wrote to memory of 2748	2000	3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe	31
PID 2668 wrote to memory of 2712	2668	cmd.exe	34
PID 2668 wrote to memory of 2712	2668	cmd.exe	34
PID 2668 wrote to memory of 2712	2668	cmd.exe	34
PID 2748 wrote to memory of 2764	2748	cmd.exe	35
PID 2748 wrote to memory of 2764	2748	cmd.exe	35
PID 2748 wrote to memory of 2764	2748	cmd.exe	35
PID 2748 wrote to memory of 2548	2748	cmd.exe	36
PID 2748 wrote to memory of 2548	2748	cmd.exe	36
PID 2748 wrote to memory of 2548	2748	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\3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe
"C:\Users\Admin\AppData\Local\Temp\3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2712
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4328.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2764
- - C:\Users\Admin\AppData\Roaming\WinUpdate.exe
    "C:\Users\Admin\AppData\Roaming\WinUpdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2548

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\tmp4328.tmp.bat

Filesize
153B

MD5
ebb1376d95a1a1b39624f91b6ba640b7

SHA1
88427ec0bd315fef333d5dea2bf1978d47beb9a6

SHA256
015502cf1ccf1d9a9cab85b9068571b4b420cb942918a6b8c0286ffe0e506267

SHA512
50b8db2a096b29c4c3d0a53085f4b3feeb65f79765b42eb3945a80255c52199654065c6728f409f3ec9472e23730a532dc277a87e8a1cb20c42655fb6f7084f0

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\WinUpdate.exe

Filesize
204KB

MD5
dfcfcd78d212140c3b087d315d5ed33b

SHA1
a3a5f02aa532c70f3452763ed6fbdfa03a7fac44

SHA256
3b03a24bfde864b0d8b17213f7f2deb6d7e3f5f74b34d3b601cbadd961b904fc

SHA512
8dd40a9d957745926f519f97a03a5727f79f120477aa624e7f8f48d6b5275f6b45df4ee998868dd4ff738f9851a0aac32df13b1674ca528cdf5fefc731ed4da7

Download Submit
memory/2000-0-0x000007FEF60B3000-0x000007FEF60B4000-memory.dmp

Filesize
4KB

Download
memory/2000-1-0x0000000000F70000-0x0000000000FA8000-memory.dmp

Filesize
224KB

Download
memory/2000-3-0x000007FEF60B0000-0x000007FEF6A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2000-11-0x000007FEF60B0000-0x000007FEF6A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2000-13-0x000007FEF60B0000-0x000007FEF6A9C000-memory.dmp

Filesize
9.9MB

Download
memory/2548-18-0x00000000010A0000-0x00000000010D8000-memory.dmp

Filesize
224KB

Download