asyncrat | 47ba146b7f2fb94a4793f6fe302b53cab7bd6bbe021b57b389a340a060ff8d7a

Reason

Machine shutdown

General

Target

h.exe
Size

47KB
MD5

03424c597882d3daa52bf027798b2e0b
SHA1

2d7fdd69b06226b6cdce05bc0820ad286b3e6b14
SHA256

47ba146b7f2fb94a4793f6fe302b53cab7bd6bbe021b57b389a340a060ff8d7a
SHA512

26a24e11ca9d7e26b44a74ef78108eb2a6aef071380703ab85b0b2ea92a719f4cd2ddbbb590a2837c18ac1cf33000872df242c4c263032d0df28ba955ae7ec90
SSDEEP

768:12uwpFTAY3IQWUe9jqmo2qL2Rxd6jnFiDOPIbSjZ60buZ3adb2g1+bWx3OXWQBDw:12uwpFTA4/256T03bqlbuZ3BXykmGdEx

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

77.100.63.251:5631

Mutex

SXPNYKU9S8ry

Attributes

delay
3
install
true
install_file
Disc367.exe
install_folder
%AppData%

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
behavioral1/files/0x001e00000002ad4b-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
1164	Disc367.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Disc367.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	h.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2136	timeout.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3835819470-2031661444-2626789713-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3835819470-2031661444-2626789713-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3835819470-2031661444-2626789713-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.exe
Key created	\REGISTRY\USER\S-1-5-21-3835819470-2031661444-2626789713-1000_Classes\Local Settings\MuiCache	BackgroundTransferHost.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
1860	schtasks.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1580	h.exe
1164	Disc367.exe
1164	Disc367.exe
1164	Disc367.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1580	h.exe
Token: SeDebugPrivilege	1164	Disc367.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1580 wrote to memory of 3472	1580	h.exe	78
PID 1580 wrote to memory of 3472	1580	h.exe	78
PID 1580 wrote to memory of 3472	1580	h.exe	78
PID 1580 wrote to memory of 4492	1580	h.exe	80
PID 1580 wrote to memory of 4492	1580	h.exe	80
PID 1580 wrote to memory of 4492	1580	h.exe	80
PID 3472 wrote to memory of 1860	3472	cmd.exe	82
PID 3472 wrote to memory of 1860	3472	cmd.exe	82
PID 3472 wrote to memory of 1860	3472	cmd.exe	82
PID 4492 wrote to memory of 2136	4492	cmd.exe	83
PID 4492 wrote to memory of 2136	4492	cmd.exe	83
PID 4492 wrote to memory of 2136	4492	cmd.exe	83
PID 4492 wrote to memory of 1164	4492	cmd.exe	84
PID 4492 wrote to memory of 1164	4492	cmd.exe	84
PID 4492 wrote to memory of 1164	4492	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\h.exe
"C:\Users\Admin\AppData\Local\Temp\h.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1580
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Disc367" /tr '"C:\Users\Admin\AppData\Roaming\Disc367.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3472
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Disc367" /tr '"C:\Users\Admin\AppData\Roaming\Disc367.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1860
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9C30.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4492
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2136
- - C:\Users\Admin\AppData\Roaming\Disc367.exe
    "C:\Users\Admin\AppData\Roaming\Disc367.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1164

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:4584

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

System Information Discovery

1

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\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\f74660e1-1c03-45d5-9746-6127e2b08e1a.down_data

Filesize
555KB

MD5
5683c0028832cae4ef93ca39c8ac5029

SHA1
248755e4e1db552e0b6f8651b04ca6d1b31a86fb

SHA256
855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

SHA512
aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9C30.tmp.bat

Filesize
151B

MD5
6f44a97dadc728bb01b8037bbc87e7d4

SHA1
14bb082017c1f55705258bf7ca34089cac46528b

SHA256
27664f1ed55d63aa29de04fe65a1c3c2e8b3121ff32a1212970a1eb2917a80e1

SHA512
00c3c09dfbc9120ab8177001229efe7ec5edef7a704ed6d0ade736df76ffaed8ef6eb95537bebad26ba570dfabb45c22fd9857585bab3f8a328beb4391ef9693

Download Submit
C:\Users\Admin\AppData\Roaming\Disc367.exe

Filesize
47KB

MD5
03424c597882d3daa52bf027798b2e0b

SHA1
2d7fdd69b06226b6cdce05bc0820ad286b3e6b14

SHA256
47ba146b7f2fb94a4793f6fe302b53cab7bd6bbe021b57b389a340a060ff8d7a

SHA512
26a24e11ca9d7e26b44a74ef78108eb2a6aef071380703ab85b0b2ea92a719f4cd2ddbbb590a2837c18ac1cf33000872df242c4c263032d0df28ba955ae7ec90

Download Submit
memory/1164-20-0x0000000007150000-0x00000000071B8000-memory.dmp

Filesize
416KB

Download
memory/1164-18-0x0000000074640000-0x0000000074DF1000-memory.dmp

Filesize
7.7MB

Download
memory/1164-29-0x0000000007890000-0x00000000078F0000-memory.dmp

Filesize
384KB

Download
memory/1164-22-0x00000000075C0000-0x0000000007652000-memory.dmp

Filesize
584KB

Download
memory/1164-13-0x0000000074640000-0x0000000074DF1000-memory.dmp

Filesize
7.7MB

Download
memory/1164-16-0x00000000068A0000-0x0000000006E46000-memory.dmp

Filesize
5.6MB

Download
memory/1164-17-0x0000000005DC0000-0x0000000005E26000-memory.dmp

Filesize
408KB

Download
memory/1164-21-0x0000000007290000-0x00000000072AE000-memory.dmp

Filesize
120KB

Download
memory/1164-19-0x00000000071D0000-0x0000000007246000-memory.dmp

Filesize
472KB

Download
memory/1580-0-0x00000000746FE000-0x00000000746FF000-memory.dmp

Filesize
4KB

Download
memory/1580-8-0x00000000746F0000-0x0000000074EA1000-memory.dmp

Filesize
7.7MB

Download
memory/1580-2-0x00000000746F0000-0x0000000074EA1000-memory.dmp

Filesize
7.7MB

Download
memory/1580-1-0x0000000000E20000-0x0000000000E32000-memory.dmp

Filesize
72KB

Download
memory/1580-3-0x00000000057C0000-0x000000000585C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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