asyncrat | 7e129f68ebb1e8730941dcf50344e256bd0e32f29cac0e641426b88a17e131c6

General

Target

vfrcxq.ps1
Size

1KB
MD5

0cdc732f0ded614eb23c08213bcf1e04
SHA1

0cbca39b7b1a0ec9b930c38c1c60d50feed74ee3
SHA256

7e129f68ebb1e8730941dcf50344e256bd0e32f29cac0e641426b88a17e131c6
SHA512

86c92258d18f25c97215c68cd4ef09b0c1433ea9de27c00247537ea8a7c187d4428b1cb151c785d5544f17da8ba9b138ef59efd3c7f7546240bf7ae5a5b29eb7

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/2556-28-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	3132	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 3132 set thread context of 2556	3132	powershell.exe	86

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3132	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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3132	powershell.exe
3132	powershell.exe
2556	RegAsm.exe
2556	RegAsm.exe
2556	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3132	powershell.exe
Token: SeDebugPrivilege	2556	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2556	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3132 wrote to memory of 1136	3132	powershell.exe	84
PID 3132 wrote to memory of 1136	3132	powershell.exe	84
PID 1136 wrote to memory of 3888	1136	csc.exe	85
PID 1136 wrote to memory of 3888	1136	csc.exe	85
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86
PID 3132 wrote to memory of 2556	3132	powershell.exe	86

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\vfrcxq.ps1
1⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3132
- 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\vomlmksk\vomlmksk.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1136
- - 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\RESAEBE.tmp" "c:\Users\Admin\AppData\Local\Temp\vomlmksk\CSCA04C0C6671184BC4B064F2DDF5A96A8.TMP"
    3⤵
    PID:3888
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2556

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

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Downloads

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

Filesize
1KB

MD5
86a0b85144d91022d42166db69568783

SHA1
3a48aa0d17484d3f659fd6a9b28e0dd2342ed818

SHA256
c1e23149147f38657494e833daaa77e1f4e4de52e177b79bb75a744bc773d518

SHA512
b647722455b44463c03c2b1b385e39224d79c179035d87431ba8961ff8431ecc1dbeb2d5facfbd9af442e17c48b81ccb14de34c5b812cddb34082b1326f51764

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n3zzs20q.5oq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
9KB

MD5
7909ba0edb338495b2d656f37bf9e7b1

SHA1
96e0222416d32ea2d573b8519bf400e1b886ecde

SHA256
ec1553650773852727c16b3c0666e5f4f510de7c7d944cfd580c15bf15b9063b

SHA512
cc89e825c1615db83b24976ef1f447297242edef33dcbde5b194bfc917eef7191c893ebb3a81e1eaaa58fbeb8594ce2a427b9f090dead160fb5b4d36b44123e4

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\vomlmksk\CSCA04C0C6671184BC4B064F2DDF5A96A8.TMP

Filesize
652B

MD5
4aac1638463548b7519f168c78c0c7e1

SHA1
ee2077fb9a04d29cb7a522a38f8cba6de9bf18a8

SHA256
1fac6879fd1538d54d1ece3f6f8223796097a2509706d045fa5e32284ba8acd9

SHA512
0b67a49451e1f2ad3033049b2b11beebc07bb73a2e700bce1d34f3ae9006899e2d138634a50d12492cd10e03f23ec155c381c22dc67bf8c4e2b7178ea3088472

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

Filesize
10KB

MD5
b5c3a2d03ff4c721192716f326c77dea

SHA1
6b754fd988ca58865674b711aba76d3c6b2c5693

SHA256
ab42fe5fd08cb87663e130f99f96124fdd37d825d081b9712b0bad8b6f270fac

SHA512
d32e5a98c12b6b85d1913555ea54f837cd0fc647ca945aef9d75ffade06506be1f4a2348827f11c4eeae0796e4156c8f352e3c0f9a6e2cdc93cb501bcdf2c248

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

Filesize
204B

MD5
df14033fd5022cc4b0418427a4a7c940

SHA1
7a46fe5cfd86f9dab6c827ec098f018aadeda5b7

SHA256
2d6b73973133334567777bab98b0612d03a87e5f43fbcf0cde616a42fe338565

SHA512
46f3f017ea5be5047e0d521ef53f6deb3c3e047144cd065e8539d4406cff566bc99993fb9254732ea0010ea25d5fe6e8f16551786fc0b541adb96dd1182acdea

Download Submit
memory/2556-33-0x0000000005AC0000-0x0000000005B52000-memory.dmp

Filesize
584KB

Download
memory/2556-32-0x0000000005CB0000-0x0000000006254000-memory.dmp

Filesize
5.6MB

Download
memory/2556-40-0x0000000006DC0000-0x0000000007114000-memory.dmp

Filesize
3.3MB

Download
memory/2556-39-0x0000000006D90000-0x0000000006DB2000-memory.dmp

Filesize
136KB

Download
memory/2556-38-0x0000000006A70000-0x0000000006AD6000-memory.dmp

Filesize
408KB

Download
memory/2556-37-0x0000000006630000-0x00000000066CC000-memory.dmp

Filesize
624KB

Download
memory/2556-28-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2556-34-0x00000000057F0000-0x00000000057FA000-memory.dmp

Filesize
40KB

Download
memory/3132-1-0x000001D9B1370000-0x000001D9B1392000-memory.dmp

Filesize
136KB

Download
memory/3132-0-0x00007FF8E8383000-0x00007FF8E8385000-memory.dmp

Filesize
8KB

Download
memory/3132-31-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/3132-26-0x000001D9B13E0000-0x000001D9B13E8000-memory.dmp

Filesize
32KB

Download
memory/3132-13-0x000001D9B13D0000-0x000001D9B13E0000-memory.dmp

Filesize
64KB

Download
memory/3132-11-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download
memory/3132-12-0x00007FF8E8380000-0x00007FF8E8E41000-memory.dmp

Filesize
10.8MB

Download

Analysis

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