asyncrat | a8e591ecd1aafcfa6e1a870be72987776f6fbce07e9e32d2a49a86b15d737b56

General

Target

JaffaCakes118_a8e591ecd1aafcfa6e1a870be72987776f6fbce07e9e32d2a49a86b15d737b56.ps1
Size

119KB
MD5

a93b0ec43734f077d5d853fc60501180
SHA1

2941fe0a75d42197faa8187bd349ef00a2f1fe11
SHA256

a8e591ecd1aafcfa6e1a870be72987776f6fbce07e9e32d2a49a86b15d737b56
SHA512

1ee7d11d6ea065ac944d9bd291d4398e04b5b36aacacbf890ad90323fcb753b650b95055744e7a6a06cd3c0a5be1634a259a536cae2b228c068b28961c4be492
SSDEEP

1536:ae9x1r3st/0i/FXT676pe+wqota8YOnOQHuy+P3fkLG8VYk8Qk6fK:/r3stS0Lwqua8YJQd+P3fkdYkBK

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

daveblack.publicvm.com:3861

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemLogin.vbs	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1488 set thread context of 376	1488	powershell.exe	85

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1488	powershell.exe

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	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1488	powershell.exe
1488	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1488	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1488 wrote to memory of 3292	1488	powershell.exe	83
PID 1488 wrote to memory of 3292	1488	powershell.exe	83
PID 3292 wrote to memory of 2772	3292	csc.exe	84
PID 3292 wrote to memory of 2772	3292	csc.exe	84
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85
PID 1488 wrote to memory of 376	1488	powershell.exe	85

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a8e591ecd1aafcfa6e1a870be72987776f6fbce07e9e32d2a49a86b15d737b56.ps1
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\d4cpsri0\d4cpsri0.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3292
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
    C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESA6B0.tmp" "c:\Users\Admin\AppData\Local\Temp\d4cpsri0\CSC8962EB54E85C43B59B6AF3E9119EED5.TMP"
    3⤵
    PID:2772
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\RESA6B0.tmp

Filesize
1KB

MD5
8e80fe18a2540ed5f13fba86a73e427e

SHA1
4aa859b0eb8daece38e8b67c7e9b1a8ed8763405

SHA256
0b9ff607d698240374ceeaf0bcbf58ecb1175db82a726b1b83224417a1082412

SHA512
3b989152e96155d842b51816cf1e25a4dbcb4a161b2157e60b07325f805ed93e5b6c76ecbe614297bcd726b51b8c42a1117a3bb4136d5fd38b59c633f5bca845

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_j30f4z1x.gd0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\d4cpsri0\d4cpsri0.dll

Filesize
11KB

MD5
285f937a02cac2879c4254bbecd25ecd

SHA1
1675177d6796ebd9ad9a3c186a1fc8a49f448b1f

SHA256
b5d3b06e0b55190701021f6964f2314538338843be4f4ff5c7abcd1015915488

SHA512
20a493eb4a33a62451b25b7037940a688294a3cda87c21fc95d1cd31497cb4d974427c535bc5a30f9ecfe9f00884ce0747d3aaf3b8872aacb2f419f4e27b7dd2

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\d4cpsri0\CSC8962EB54E85C43B59B6AF3E9119EED5.TMP

Filesize
652B

MD5
9ef49c6ef01bc03d159303ea53d92487

SHA1
68e61bb9088f934692ff248f61978879844833c3

SHA256
8439b2d4163f9a75b8abd936e8165ecd16109f49d8e6ceb2f859a15e9223b1de

SHA512
b95d03c7b72012b2dff9456e2f12a72e600ab207e38b70f87c39dadfa46b8df09350e3cef1157c3791a4dee599e3882b8381be1ffead7472e852d00c7f9aab7f

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\d4cpsri0\d4cpsri0.0.cs

Filesize
14KB

MD5
5b28648a4e188b0ebdf2d5edcda61624

SHA1
faf0ba6c2ef8d8184881eda8a276796449969e1c

SHA256
e92acafc5a9dd128b120809aaf76178275c3d22b13fb7cc2f0d9c624befed1b1

SHA512
972fca6205f8927363b751ff51c6cf07c3b42f7cbd8fbe12c1098df539118ecf3d3ce1af3b5d376c8710ed183786fc911279ff81941aba4202a11ca5670b9937

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\d4cpsri0\d4cpsri0.cmdline

Filesize
327B

MD5
2a6c5f27aa85f1bb610dd1f8fa8b90ec

SHA1
eacd16be85122703c4337f007677f0e9ded9555a

SHA256
5095d18cac297322bc6804f173fa904666feafb81a96f10ae5e114a6235f4c2a

SHA512
2d3bb3f001b5c459c089de34e87c23826828e636790d7f8d405d0268e1def850f025e32352961a3d34d9390e8ff3b4375dc1bc3af64a154c46a01c08e5248c31

Download Submit
memory/376-35-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/376-34-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/376-30-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1488-12-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1488-14-0x000001DCE9FD0000-0x000001DCEA4F8000-memory.dmp

Filesize
5.2MB

Download
memory/1488-13-0x000001DCE9A20000-0x000001DCE9A96000-memory.dmp

Filesize
472KB

Download
memory/1488-28-0x000001DCE7330000-0x000001DCE733A000-memory.dmp

Filesize
40KB

Download
memory/1488-0-0x00007FF878A33000-0x00007FF878A35000-memory.dmp

Filesize
8KB

Download
memory/1488-33-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1488-11-0x00007FF878A30000-0x00007FF8794F1000-memory.dmp

Filesize
10.8MB

Download
memory/1488-10-0x000001DCE95C0000-0x000001DCE95E2000-memory.dmp

Filesize
136KB

Download

Analysis

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