asyncrat | 75d8cbfff9ef383cc77a1d5c83e113df52e087551a26a500982bc85dcfa40715

Analysis

max time kernel
93s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-12-2024 01:07

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General

Target

b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe
Size

2.2MB
MD5

3541c1ac26eb5bbb87f01c20fd9f8824
SHA1

bf5d136c911491f59bdeb3bf37b8f1a155fd3a97
SHA256

b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1
SHA512

babc17723d2389919acd96f977821d57bdd737f01a9598209efafa72ae0418e914a5d229f196d80cb5ba70ce82b0f340b18aa255bbe4ed77d821a432d5794a93
SSDEEP

49152:pHx/9iRLusgfLziEqFhJ5v96Adh3BeNHdbOTPixC30tP0MQ:DURLyU95JdhGda7wcM

Score

10^/10

asyncrat stormkitty discovery persistence 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
behavioral1/memory/4488-1202-0x0000000000960000-0x0000000000C64000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 2272 created 3432	2272	callmobile.exe	56

Executes dropped EXE 2 IoCs

pid	Process
2272	callmobile.exe
2924	Wihnup.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2272 set thread context of 4488	2272	callmobile.exe	92

System Location Discovery: System Language Discovery 1 TTPs 7 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	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Wihnup.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	callmobile.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4668	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4504	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2272	callmobile.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe
4488	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2272	callmobile.exe
Token: SeDebugPrivilege	2272	callmobile.exe
Token: SeDebugPrivilege	4488	MSBuild.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4232 wrote to memory of 2272	4232	b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe	82
PID 4232 wrote to memory of 2272	4232	b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe	82
PID 4232 wrote to memory of 2272	4232	b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe	82
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 2272 wrote to memory of 4488	2272	callmobile.exe	92
PID 4488 wrote to memory of 2204	4488	MSBuild.exe	93
PID 4488 wrote to memory of 2204	4488	MSBuild.exe	93
PID 4488 wrote to memory of 2204	4488	MSBuild.exe	93
PID 4488 wrote to memory of 2604	4488	MSBuild.exe	95
PID 4488 wrote to memory of 2604	4488	MSBuild.exe	95
PID 4488 wrote to memory of 2604	4488	MSBuild.exe	95
PID 2604 wrote to memory of 4668	2604	cmd.exe	97
PID 2604 wrote to memory of 4668	2604	cmd.exe	97
PID 2604 wrote to memory of 4668	2604	cmd.exe	97
PID 2204 wrote to memory of 4504	2204	cmd.exe	98
PID 2204 wrote to memory of 4504	2204	cmd.exe	98
PID 2204 wrote to memory of 4504	2204	cmd.exe	98
PID 2604 wrote to memory of 2924	2604	cmd.exe	99
PID 2604 wrote to memory of 2924	2604	cmd.exe	99
PID 2604 wrote to memory of 2924	2604	cmd.exe	99

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3432
- C:\Users\Admin\AppData\Local\Temp\b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe
  "C:\Users\Admin\AppData\Local\Temp\b7cd929ce4d0fa849eeab8a216e1333f63c7d3530da674f163efab4dae3439d1.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\callmobile.exe
    C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\callmobile.exe
    3⤵
    - Suspicious use of NtCreateUserProcessOtherParentProcess
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2272
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Wihnup" /tr '"C:\Users\Admin\AppData\Roaming\Wihnup.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2204
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "Wihnup" /tr '"C:\Users\Admin\AppData\Roaming\Wihnup.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:4504
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7FE9.tmp.bat""
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2604
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:4668
  - - C:\Users\Admin\AppData\Roaming\Wihnup.exe
      "C:\Users\Admin\AppData\Roaming\Wihnup.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:2924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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\IXP000.TMP\callmobile.exe

Filesize
2.3MB

MD5
ffabcc262fb699998b6191d7656c8805

SHA1
fd3ea79a8550b14e9cc75fb831fd7a141964a714

SHA256
f46e4a7de978baceec5f64cbc9fa1f1e772e864fa3310045cd19d77264698cde

SHA512
79b2e21a9111b16b0f67ae5d1cc40a25773b847d3f4cf78711a8dfd8b67c30beec332ed65ac008c9dca62c84de891eff20d7c6050bc868bce77a17fe56da61ba

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7FE9.tmp.bat

Filesize
150B

MD5
df9ab7eb279615cbe671c0c3958eedd2

SHA1
f00bf67fff8b7dff3f39ebf6fee6a292e2f403d3

SHA256
78f1af2251a718299f7c5dfa3bf3798b4959b30cd2cb911eb544f12f94fdcac4

SHA512
97716a4c91a3dea3a90962acd137af8ce914c67032e3978118d553a309fb46a8d94cae5861f534884738c8505e796185b13b4ca48db37a5ea0c218836ae41129

Download Submit
C:\Users\Admin\AppData\Roaming\Wihnup.exe

Filesize
256KB

MD5
8fdf47e0ff70c40ed3a17014aeea4232

SHA1
e6256a0159688f0560b015da4d967f41cbf8c9bd

SHA256
ed9884bac608c06b7057037cc91d90e4ae5f74dd2dbce2af476699c6d4492d82

SHA512
bd69d092ed4f9c5e1f24eaf5ec79fb316469d53849dc798fae0fcba5e90869b77ee924c23cc6f692198ff25827ab60ad47bb46cadd6e0aadde7731cbafb013be

Download Submit
memory/2272-41-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-10-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-7-0x0000000005130000-0x000000000532E000-memory.dmp

Filesize
2.0MB

Download
memory/2272-8-0x00000000058E0000-0x0000000005E84000-memory.dmp

Filesize
5.6MB

Download
memory/2272-9-0x0000000005330000-0x00000000053C2000-memory.dmp

Filesize
584KB

Download
memory/2272-11-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-27-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-13-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-59-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-48-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-71-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-73-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-69-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-67-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-65-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-63-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-61-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-57-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-55-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-25-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-51-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-49-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-45-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-43-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-37-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-35-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-33-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-5-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/2272-40-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-6-0x0000000000410000-0x000000000066E000-memory.dmp

Filesize
2.4MB

Download
memory/2272-53-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-23-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-31-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-29-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-21-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-19-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-17-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-15-0x0000000005130000-0x0000000005328000-memory.dmp

Filesize
2.0MB

Download
memory/2272-1187-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-1186-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-1188-0x00000000055D0000-0x000000000573E000-memory.dmp

Filesize
1.4MB

Download
memory/2272-1189-0x00000000050D0000-0x000000000511C000-memory.dmp

Filesize
304KB

Download
memory/2272-1190-0x000000007454E000-0x000000007454F000-memory.dmp

Filesize
4KB

Download
memory/2272-1191-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-1192-0x00000000054E0000-0x0000000005534000-memory.dmp

Filesize
336KB

Download
memory/2272-1196-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-1198-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-1200-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-1201-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/2924-1215-0x00000000004A0000-0x00000000004E0000-memory.dmp

Filesize
256KB

Download
memory/2924-1216-0x00000000026E0000-0x00000000026FA000-memory.dmp

Filesize
104KB

Download
memory/2924-1217-0x0000000004EC0000-0x000000000501A000-memory.dmp

Filesize
1.4MB

Download
memory/4488-1203-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/4488-1202-0x0000000000960000-0x0000000000C64000-memory.dmp

Filesize
3.0MB

Download
memory/4488-1204-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/4488-1205-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download
memory/4488-1210-0x0000000074540000-0x0000000074CF0000-memory.dmp

Filesize
7.7MB

Download