asyncrat | a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283d

General

Target

a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
Size

47KB
MD5

d0f486c211c51e7968978c73a10020a0
SHA1

8ef24e6079810505b323f056a471e9963c13e72a
SHA256

a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283d
SHA512

b99dd7fd987a76d664c41b5abe5b4b5a4bd6e711425eb5a9b464fcbb96da7e254112518c4d2c2f1199970138bd5cd87148e4233a01d379f2394acae28b9a20ed
SSDEEP

768:EuXI1TAYhAVWU1LGvmo2q4KSETUvgcPI0qfiFps0bX/GVOl6krLKFOycBDZYx:EuXI1TAuP2q8K0qfAZbX/G8UL6dYx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

147.185.221.24:40668

resolution-messages.gl.at.ply.gg:40668

Mutex

lzsTzjhhhJXe

Attributes

delay
3
install
true
install_file
Windows Temporary Storage Helper.exe
install_folder
%Temp%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000200000001e746-12.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe

Executes dropped EXE 1 IoCs

pid	Process
440	Windows Temporary Storage Helper.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows Temporary Storage Helper.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1848	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
384	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
Token: SeDebugPrivilege	440	Windows Temporary Storage Helper.exe
Token: SeDebugPrivilege	440	Windows Temporary Storage Helper.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 3644	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	83
PID 2988 wrote to memory of 3644	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	83
PID 2988 wrote to memory of 3644	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	83
PID 2988 wrote to memory of 3520	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	85
PID 2988 wrote to memory of 3520	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	85
PID 2988 wrote to memory of 3520	2988	a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe	85
PID 3644 wrote to memory of 384	3644	cmd.exe	87
PID 3644 wrote to memory of 384	3644	cmd.exe	87
PID 3644 wrote to memory of 384	3644	cmd.exe	87
PID 3520 wrote to memory of 1848	3520	cmd.exe	88
PID 3520 wrote to memory of 1848	3520	cmd.exe	88
PID 3520 wrote to memory of 1848	3520	cmd.exe	88
PID 3520 wrote to memory of 440	3520	cmd.exe	91
PID 3520 wrote to memory of 440	3520	cmd.exe	91
PID 3520 wrote to memory of 440	3520	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe
"C:\Users\Admin\AppData\Local\Temp\a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283dN.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Temporary Storage Helper" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3644
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows Temporary Storage Helper" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:384
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8983.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3520
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1848
- - C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe
    "C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Windows Temporary Storage Helper.exe

Filesize
47KB

MD5
d0f486c211c51e7968978c73a10020a0

SHA1
8ef24e6079810505b323f056a471e9963c13e72a

SHA256
a3da0616ac4d01c59eec0cfd5594969def71f919a0bda2a2976334a3cc3c283d

SHA512
b99dd7fd987a76d664c41b5abe5b4b5a4bd6e711425eb5a9b464fcbb96da7e254112518c4d2c2f1199970138bd5cd87148e4233a01d379f2394acae28b9a20ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8983.tmp.bat

Filesize
179B

MD5
1e3bb31601a4ece22dd6d38f8ac19f64

SHA1
94511735423c09430005430669861b21dc2c4c37

SHA256
e781a18f4ed90ee066703307f25f06d7a4cc217c34707bd52b7ba851ed8f50fc

SHA512
a5912cb58bf89d9543bba9027fe8b5945ca2c7201059f2f639db580b90df58645ef617a0c5ee1e226af220ede3f470343564d2c52ecd0c163f75e9282d150288

Download Submit
memory/440-14-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/440-15-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/2988-0-0x000000007530E000-0x000000007530F000-memory.dmp

Filesize
4KB

Download
memory/2988-1-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/2988-2-0x0000000075300000-0x0000000075AB0000-memory.dmp

Filesize
7.7MB

Download
memory/2988-3-0x0000000004CA0000-0x0000000004D06000-memory.dmp

Filesize
408KB

Download
memory/2988-4-0x0000000005130000-0x00000000051CC000-memory.dmp

Filesize
624KB

Download
memory/2988-9-0x0000000075300000-0x0000000075AB0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads