asyncrat | 79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-10-2024 21:13

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General

Target

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe
Size

1.6MB
MD5

decc91c25ed4e101cc014b9a934dc5a3
SHA1

e4a43704cd1a6fbdd2891731cc05c77e4eb50713
SHA256

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605
SHA512

98fad9a17c308e7a863adde27d9fee06f85c57b8ccdff0c733214b260b42a192e99aadc0a6a19b08a2154db18f109ec6c7b078ef3dc710ba12bf44c3b7a3ca9b
SSDEEP

49152:m+6V1P6ugIMyBXQ6dlBmFL9QfuD2XaK0Gb7D:e76ugIxBXpBmbn2XaK0oD

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yygrdsr = "C:\\Users\\Admin\\AppData\\Roaming\\Yygrdsr.exe"	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe

description	pid	process	target process
PID 1208 set thread context of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exeInstallUtil.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe

description	pid	process
Token: SeDebugPrivilege	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe
Token: SeDebugPrivilege	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe

description	pid	process	target process
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe
PID 1208 wrote to memory of 5032	1208	79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe
"C:\Users\Admin\AppData\Local\Temp\79512c2ddc11fb9d9f95f7e6fbacbb91db53362ce6799cf89d870683e63f4605.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1208

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
2⤵
- System Location Discovery: System Language Discovery
PID:5032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

memory/1208-0-0x0000000074EFE000-0x0000000074EFF000-memory.dmp

Filesize
4KB

Download
memory/1208-1-0x00000000003F0000-0x0000000000584000-memory.dmp

Filesize
1.6MB

Download
memory/1208-2-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-3-0x0000000004E70000-0x0000000004F88000-memory.dmp

Filesize
1.1MB

Download
memory/1208-4-0x0000000005190000-0x0000000005276000-memory.dmp

Filesize
920KB

Download
memory/1208-12-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-22-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-66-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-68-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-64-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-62-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-58-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-56-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-55-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-52-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-48-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-46-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-44-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-42-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-60-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-50-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-40-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-38-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-36-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-34-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-32-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-30-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-26-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-24-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-20-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-18-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-16-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-14-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-10-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-8-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-6-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-28-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-5-0x0000000005190000-0x000000000526F000-memory.dmp

Filesize
892KB

Download
memory/1208-1079-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-1080-0x00000000052C0000-0x000000000531E000-memory.dmp

Filesize
376KB

Download
memory/1208-1081-0x00000000053B0000-0x00000000053FC000-memory.dmp

Filesize
304KB

Download
memory/1208-1086-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-1085-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-1087-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/1208-1088-0x0000000074EFE000-0x0000000074EFF000-memory.dmp

Filesize
4KB

Download
memory/1208-1089-0x0000000005D30000-0x00000000062D4000-memory.dmp

Filesize
5.6MB

Download
memory/1208-1090-0x0000000000D40000-0x0000000000D94000-memory.dmp

Filesize
336KB

Download
memory/1208-1094-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/5032-1095-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/5032-1093-0x0000000000400000-0x000000000041A000-memory.dmp

Filesize
104KB

Download
memory/5032-1096-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/5032-1097-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/5032-1098-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download