asyncrat | 8b61887dff9a4f0635d45dfca88ae9e3aa5c8785bdfc17721748807fa543b85b

General

Target

5e8a676a5b37f85a09339873a139a73268662b1c0bfe94d764bbfffec60ea196.ps1
Size

1KB
MD5

1ec2c58c17fc606446451058a6961972
SHA1

abfd1b16246bcce8721d2c5aa85cfa354135f2ff
SHA256

5e8a676a5b37f85a09339873a139a73268662b1c0bfe94d764bbfffec60ea196
SHA512

7365d26c3b74e25d18618d3042ff98fedae2d1e5db6f2c6d0a7034582141a78e5c2df949477c1169e471ced3fcf94d660b7cd8655ecd6bda2d803f1ecc0c0f17

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/4336-28-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	1260	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 1260 set thread context of 4336	1260	powershell.exe	86

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1260	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 7 IoCs

pid	Process
1260	powershell.exe
1260	powershell.exe
1260	powershell.exe
1260	powershell.exe
4336	RegAsm.exe
4336	RegAsm.exe
4336	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1260	powershell.exe
Token: SeDebugPrivilege	4336	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4336	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 4876	1260	powershell.exe	83
PID 1260 wrote to memory of 4876	1260	powershell.exe	83
PID 4876 wrote to memory of 948	4876	csc.exe	84
PID 4876 wrote to memory of 948	4876	csc.exe	84
PID 1260 wrote to memory of 3384	1260	powershell.exe	85
PID 1260 wrote to memory of 3384	1260	powershell.exe	85
PID 1260 wrote to memory of 3384	1260	powershell.exe	85
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86
PID 1260 wrote to memory of 4336	1260	powershell.exe	86

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\5e8a676a5b37f85a09339873a139a73268662b1c0bfe94d764bbfffec60ea196.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:1260
- 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\uufiswj4\uufiswj4.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4876
- - 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\RESBE5E.tmp" "c:\Users\Admin\AppData\Local\Temp\uufiswj4\CSC65F72A7449FC4B13BA31D3DDF3680B2.TMP"
    3⤵
    PID:948
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:3384
- 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:4336

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\RESBE5E.tmp

Filesize
1KB

MD5
e5d02c3a9590c27bf580933641eafc1f

SHA1
eadefcf33bb4c13a7d43db90683cbaa5967a4a1f

SHA256
46a00435957bad0fb655c9bcc6b1c706d90424a6e259f85d16a8edf8a0d830cc

SHA512
944d085fa718de952835a65692e72be94f2541c4a5c7cf4a0ac99ab2014ba59e6994ad2237099688d89aa3a843e0c651d1802ce585c752d3190b18f6e0efc638

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4e5coybe.2wc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\uufiswj4\uufiswj4.dll

Filesize
9KB

MD5
dc10d6de64026543120d70f27dcba44c

SHA1
bae75061854ecdc15b8ec0a6422356603d2a96de

SHA256
dbaa72c2893a6b9e1850313918e5d621a63fd81028de333179cf423be9c7467b

SHA512
b6b61d83eff3656b5030a35ccd0ffffcd724eee08109109103eab2603837ab67660150b05401054890f4963e0093f0111b5d31bba674a59e4850ed760e8802f8

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\uufiswj4\CSC65F72A7449FC4B13BA31D3DDF3680B2.TMP

Filesize
652B

MD5
faffa5193d15f5c4a27d53103f6f86f3

SHA1
854c0d6a0085e122eeeed284ac7a3dfd42fe3eaa

SHA256
8ae7257c3171b7c000de285f359b7239ec1863a25eb19f7572231bfcecbb9215

SHA512
b02f984c28f91765f0a84358e256eb39b907e3d276b738c04083da38c3d7ba2c81aeed9d9cdc1020b5d1feaeee6fddbc5ddbba611a4587c5fcec0766bc132149

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\uufiswj4\uufiswj4.0.cs

Filesize
10KB

MD5
3fa79decff8805745cea8116d9bb2643

SHA1
92343c5fa2c768b964ae3a4e9136e5d7193e8558

SHA256
e6852a401b53a7af04d57aa1e4fc9621e3dffc1221534142316a27ae67e8f89c

SHA512
5c2879e59fa6609e6e87f70c5237b250a906bf7dd13a343dac9e81635b1fc91ad9374e643a306b99503c52ce9bd56554a64aa132584c732d43ee39fb17305d78

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\uufiswj4\uufiswj4.cmdline

Filesize
204B

MD5
a96e6637cc3fb48581def7d4ad10048a

SHA1
bf8cec0d51622914fa614f557d480554f91f0402

SHA256
2290224432a9f0a90ebc62f39348f3b74919085165da4bb069d0fc7f9b8e04ae

SHA512
3dbdd267f52f056a7bec130af394abfa4e439954abffbd5e3c4c892c78bae09ab0db95091cec322610604ca44fa317d1627ead481160d0656970272bb45c6e01

Download Submit
memory/1260-13-0x00000247939A0000-0x00000247939AE000-memory.dmp

Filesize
56KB

Download
memory/1260-31-0x00007FFD352C0000-0x00007FFD35D81000-memory.dmp

Filesize
10.8MB

Download
memory/1260-12-0x00007FFD352C0000-0x00007FFD35D81000-memory.dmp

Filesize
10.8MB

Download
memory/1260-11-0x00007FFD352C0000-0x00007FFD35D81000-memory.dmp

Filesize
10.8MB

Download
memory/1260-6-0x0000024793B60000-0x0000024793B82000-memory.dmp

Filesize
136KB

Download
memory/1260-26-0x0000024793B90000-0x0000024793B98000-memory.dmp

Filesize
32KB

Download
memory/1260-0-0x00007FFD352C3000-0x00007FFD352C5000-memory.dmp

Filesize
8KB

Download
memory/4336-28-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/4336-32-0x0000000005870000-0x0000000005E14000-memory.dmp

Filesize
5.6MB

Download
memory/4336-33-0x00000000055C0000-0x0000000005652000-memory.dmp

Filesize
584KB

Download
memory/4336-34-0x00000000051E0000-0x00000000051EA000-memory.dmp

Filesize
40KB

Download
memory/4336-37-0x0000000006440000-0x00000000064DC000-memory.dmp

Filesize
624KB

Download
memory/4336-38-0x00000000064E0000-0x0000000006546000-memory.dmp

Filesize
408KB

Download
memory/4336-39-0x00000000069C0000-0x00000000069E2000-memory.dmp

Filesize
136KB

Download
memory/4336-40-0x00000000069F0000-0x0000000006D44000-memory.dmp

Filesize
3.3MB

Download

Analysis

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