asyncrat | 230b143294c018f8fc6c36581be214e2d3725546bba0a241da12854052806005

Analysis

max time kernel
93s
max time network
148s
platform
windows11-21h2_x64
resource
win11-20250210-en
resource tags

arch:x64arch:x86image:win11-20250210-enlocale:en-usos:windows11-21h2-x64system
submitted
12-02-2025 20:22

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General

Target

L5shRfh.exe
Size

6.2MB
MD5

3cb427c5f783752ea688c135b516dbb4
SHA1

8a9e0937d7db2b951f50c7cc1f0ebf42aaafb21b
SHA256

230b143294c018f8fc6c36581be214e2d3725546bba0a241da12854052806005
SHA512

f35074310eb13beb43039b440af695500e0eb4ff9634a820be9838e6bddeda8ca7d05ef969fe21f2ffd856bb88022d6e6c0b3b59cb131b90dcae22fe238f9697
SSDEEP

98304:H7SmQ0OBrD+f8wNVrq2+ow64WfRnZUo7SmQ0OBrD+f8wNVrq2+ow64WfRnZUW:HOmSDktNjZUoOmSDktNjZUW

Score

10^/10

asyncrat stormkitty discovery 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
behavioral3/memory/4664-4-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Downloads MZ/PE file 1 IoCs

flow	pid	Process
18	3804	Process not Found

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral3/memory/4392-1-0x0000000000CA0000-0x00000000012E0000-memory.dmp	net_reactor

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4392 set thread context of 4664	4392	L5shRfh.exe	88
PID 4392 set thread context of 4628	4392	L5shRfh.exe	90

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3744	4392	WerFault.exe	84
4848	4664	WerFault.exe	88

System Location Discovery: System Language Discovery 1 TTPs 4 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	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	L5shRfh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	L5shRfh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	L5shRfh.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3772	MicrosoftEdgeUpdate.exe

Suspicious use of AdjustPrivilegeToken 43 IoCs

description	pid	Process
Token: SeDebugPrivilege	4664	L5shRfh.exe
Token: SeIncreaseQuotaPrivilege	4664	L5shRfh.exe
Token: SeSecurityPrivilege	4664	L5shRfh.exe
Token: SeTakeOwnershipPrivilege	4664	L5shRfh.exe
Token: SeLoadDriverPrivilege	4664	L5shRfh.exe
Token: SeSystemProfilePrivilege	4664	L5shRfh.exe
Token: SeSystemtimePrivilege	4664	L5shRfh.exe
Token: SeProfSingleProcessPrivilege	4664	L5shRfh.exe
Token: SeIncBasePriorityPrivilege	4664	L5shRfh.exe
Token: SeCreatePagefilePrivilege	4664	L5shRfh.exe
Token: SeBackupPrivilege	4664	L5shRfh.exe
Token: SeRestorePrivilege	4664	L5shRfh.exe
Token: SeShutdownPrivilege	4664	L5shRfh.exe
Token: SeDebugPrivilege	4664	L5shRfh.exe
Token: SeSystemEnvironmentPrivilege	4664	L5shRfh.exe
Token: SeRemoteShutdownPrivilege	4664	L5shRfh.exe
Token: SeUndockPrivilege	4664	L5shRfh.exe
Token: SeManageVolumePrivilege	4664	L5shRfh.exe
Token: 33	4664	L5shRfh.exe
Token: 34	4664	L5shRfh.exe
Token: 35	4664	L5shRfh.exe
Token: 36	4664	L5shRfh.exe
Token: SeIncreaseQuotaPrivilege	4664	L5shRfh.exe
Token: SeSecurityPrivilege	4664	L5shRfh.exe
Token: SeTakeOwnershipPrivilege	4664	L5shRfh.exe
Token: SeLoadDriverPrivilege	4664	L5shRfh.exe
Token: SeSystemProfilePrivilege	4664	L5shRfh.exe
Token: SeSystemtimePrivilege	4664	L5shRfh.exe
Token: SeProfSingleProcessPrivilege	4664	L5shRfh.exe
Token: SeIncBasePriorityPrivilege	4664	L5shRfh.exe
Token: SeCreatePagefilePrivilege	4664	L5shRfh.exe
Token: SeBackupPrivilege	4664	L5shRfh.exe
Token: SeRestorePrivilege	4664	L5shRfh.exe
Token: SeShutdownPrivilege	4664	L5shRfh.exe
Token: SeDebugPrivilege	4664	L5shRfh.exe
Token: SeSystemEnvironmentPrivilege	4664	L5shRfh.exe
Token: SeRemoteShutdownPrivilege	4664	L5shRfh.exe
Token: SeUndockPrivilege	4664	L5shRfh.exe
Token: SeManageVolumePrivilege	4664	L5shRfh.exe
Token: 33	4664	L5shRfh.exe
Token: 34	4664	L5shRfh.exe
Token: 35	4664	L5shRfh.exe
Token: 36	4664	L5shRfh.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4392 wrote to memory of 3292	4392	L5shRfh.exe	87
PID 4392 wrote to memory of 3292	4392	L5shRfh.exe	87
PID 4392 wrote to memory of 3292	4392	L5shRfh.exe	87
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 4664	4392	L5shRfh.exe	88
PID 4392 wrote to memory of 2856	4392	L5shRfh.exe	89
PID 4392 wrote to memory of 2856	4392	L5shRfh.exe	89
PID 4392 wrote to memory of 2856	4392	L5shRfh.exe	89
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90
PID 4392 wrote to memory of 4628	4392	L5shRfh.exe	90

C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe
"C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4392
- C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe
  "C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe"
  2⤵
  PID:3292
- C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe
  "C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:4664
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 1356
    3⤵
    - Program crash
    PID:4848
- C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe
  "C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe"
  2⤵
  PID:2856
- C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe
  "C:\Users\Admin\AppData\Local\Temp\L5shRfh.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4628
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4392 -s 872
  2⤵
  - Program crash
  PID:3744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4392 -ip 4392
1⤵
PID:2268

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4664 -ip 4664
1⤵
PID:3388

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PG9lbSBwcm9kdWN0X21hbnVmYWN0dXJlcj0iIiBwcm9kdWN0X25hbWU9IiIvPjxleHAgZXRhZz0iJnF1b3Q7RSt4YkF6Nlk2c1UxMjg5YlM2cWw0VlJMYmtqZkJVR1RNSnNqckhyNDRpST0mcXVvdDsiLz48YXBwIGFwcGlkPSJ7OEE2OUQzNDUtRDU2NC00NjNjLUFGRjEtQTY5RDlFNTMwRjk2fSIgdmVyc2lvbj0iMTIzLjAuNjMxMi4xMjMiIG5leHR2ZXJzaW9uPSIiIGxhbmc9ImVuIiBicmFuZD0iR0dMUyIgY2xpZW50PSIiIGluc3RhbGxhZ2U9IjIiIGluc3RhbGxkYXRldGltZT0iMTczOTE4NDMzNiIgb29iZV9pbnN0YWxsX3RpbWU9IjEzMzgzNjU1NjQ3OTQxMDAwMCI-PGV2ZW50IGV2ZW50dHlwZT0iMzEiIGV2ZW50cmVzdWx0PSIxIiBlcnJvcmNvZGU9IjAiIGV4dHJhY29kZTE9IjIxNzk4NjIiIHN5c3RlbV91cHRpbWVfdGlja3M9IjUyMjgyNTAzNTIiLz48L2FwcD48L3JlcXVlc3Q-
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:3772

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4392-0-0x0000000073FAE000-0x0000000073FAF000-memory.dmp

Filesize
4KB

Download
memory/4392-1-0x0000000000CA0000-0x00000000012E0000-memory.dmp

Filesize
6.2MB

Download
memory/4392-2-0x00000000061B0000-0x0000000006756000-memory.dmp

Filesize
5.6MB

Download
memory/4392-6-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download
memory/4392-12-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download
memory/4628-7-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download
memory/4628-11-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download
memory/4664-4-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/4664-8-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download
memory/4664-10-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download
memory/4664-13-0x00000000058A0000-0x0000000005906000-memory.dmp

Filesize
408KB

Download
memory/4664-14-0x0000000073FA0000-0x0000000074751000-memory.dmp

Filesize
7.7MB

Download