asyncrat | 4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf

General

Target

4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe
Size

2.0MB
MD5

1ebc277fc5893971a3c010fe7cbf644f
SHA1

8444279fee95bebfbf882134962a1afaa16f0b45
SHA256

4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf
SHA512

86f0df5d10925440b6fc5ec9b0cc723f7babb6d8a04d93f9878ebcb3044ab1f40b07b2c54d659092088f870e331dffc69eea9aa2ddedd8cd27374320d46ecfd4
SSDEEP

24576:qEjTWrDgjlTiiQud5Jg1zC+VfsPprIghtNZ26D2dXdsjdzglySX:sr0jZiiV5CtC4fsprltNZ26DKsRoX

Score

10^/10

asyncrat default discovery rat upx

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

allay.x3322.net:5050

Mutex

gnrfjlujxmukjuvrs

Attributes

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

aes.plain

Signatures

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

VenomRAT 5 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral1/memory/2060-0-0x0000000000400000-0x0000000000646000-memory.dmp	VenomRAT
behavioral1/memory/2060-7-0x0000000000400000-0x0000000000646000-memory.dmp	VenomRAT
behavioral1/files/0x000a00000001211b-11.dat	VenomRAT
behavioral1/memory/1424-14-0x0000000000240000-0x0000000000258000-memory.dmp	VenomRAT
behavioral1/memory/1952-31-0x0000000000F40000-0x0000000000F58000-memory.dmp	VenomRAT

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000a00000001211b-11.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1424	Client.exe
1952	WriteFile.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2060-1-0x0000000068CD0000-0x0000000068CDF000-memory.dmp	upx
behavioral1/memory/2060-2-0x00000000001C0000-0x00000000001CF000-memory.dmp	upx

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2380	2060	WerFault.exe	29

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2620	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
1624	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe
1424	Client.exe
1952	WriteFile.exe
1952	WriteFile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1424	Client.exe
Token: SeDebugPrivilege	1952	WriteFile.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe
2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe
1952	WriteFile.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 1424	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	31
PID 2060 wrote to memory of 1424	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	31
PID 2060 wrote to memory of 1424	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	31
PID 2060 wrote to memory of 1424	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	31
PID 1424 wrote to memory of 1892	1424	Client.exe	32
PID 1424 wrote to memory of 1892	1424	Client.exe	32
PID 1424 wrote to memory of 1892	1424	Client.exe	32
PID 1424 wrote to memory of 768	1424	Client.exe	33
PID 1424 wrote to memory of 768	1424	Client.exe	33
PID 1424 wrote to memory of 768	1424	Client.exe	33
PID 768 wrote to memory of 2620	768	cmd.exe	36
PID 768 wrote to memory of 2620	768	cmd.exe	36
PID 768 wrote to memory of 2620	768	cmd.exe	36
PID 1892 wrote to memory of 1624	1892	cmd.exe	37
PID 1892 wrote to memory of 1624	1892	cmd.exe	37
PID 1892 wrote to memory of 1624	1892	cmd.exe	37
PID 2060 wrote to memory of 2380	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	38
PID 2060 wrote to memory of 2380	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	38
PID 2060 wrote to memory of 2380	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	38
PID 2060 wrote to memory of 2380	2060	4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe	38
PID 768 wrote to memory of 1952	768	cmd.exe	39
PID 768 wrote to memory of 1952	768	cmd.exe	39
PID 768 wrote to memory of 1952	768	cmd.exe	39

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\4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe
"C:\Users\Admin\AppData\Local\Temp\4643a65fbe48cb8d17b33aea46ffb8d33ae1e7497dcfffe1715cb93010abd4bf.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Client.exe
  "C:\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1424
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1892
  - - C:\Windows\system32\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "WriteFile" /tr '"C:\Users\Admin\AppData\Roaming\WriteFile.exe"'
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1624
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF373.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:768
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2620
  - - C:\Users\Admin\AppData\Roaming\WriteFile.exe
      "C:\Users\Admin\AppData\Roaming\WriteFile.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2060 -s 868
  2⤵
  - Program crash
  PID:2380

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Client.exe

Filesize
74KB

MD5
b7d579e26b673c6866c448e6af708515

SHA1
ef19b6d6fcd369c8636dc0539dd32589a89f2c09

SHA256
6035245b15f24292d031bb460c6b9a4301ced628f93d37b58771aca3b49aa07a

SHA512
df0ad0004e9e40274bdd4ac586400b096679d456e35b0ac2a2d25c15cff17557428bb38023c8ed38c52e3d7eef962cfd1c3092f82fe5ea2ef1cf0ea442c8741c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF373.tmp.bat

Filesize
153B

MD5
14eab43ee83b371789744c1f8c06c05e

SHA1
04269c866c4a7d09b420562ea983561256a8c525

SHA256
954c775e82f43f31407bfe0c720783d53c898711bcf8e828ecb1d726ff4469cc

SHA512
f703cb2f544dacca1cc5ee4bd21f10c62a53de6554e204fc519426f778f948a061fd3e2cc3a4c8e02365ba0aa11483d3706c01a3c656a728481bcc62390e9c7f

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

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
memory/1424-25-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download
memory/1424-13-0x000007FEF5823000-0x000007FEF5824000-memory.dmp

Filesize
4KB

Download
memory/1424-14-0x0000000000240000-0x0000000000258000-memory.dmp

Filesize
96KB

Download
memory/1424-16-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download
memory/1424-26-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

Filesize
9.9MB

Download
memory/1952-31-0x0000000000F40000-0x0000000000F58000-memory.dmp

Filesize
96KB

Download
memory/2060-7-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2060-0-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2060-1-0x0000000068CD0000-0x0000000068CDF000-memory.dmp

Filesize
60KB

Download
memory/2060-2-0x00000000001C0000-0x00000000001CF000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads