asyncrat | b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef

General

Target
b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
Size 45KB
Sample260710-2d3vjsfv4x
SHA256 b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef
MD5 e1243999f2233805206bec0d8454668c
SHA1 e1902e3e05a71c60137b8f1a89a38e924ff2acdd
SHA512 39ea0b0d9ae26210c0b67d74616e39dc72ef96330e39b568c8574ebef42dcc08699bc6ed015d04f9b38d4cba34ae53bf2adeebeffeded1bb89171981b4f19f34
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1umaPclm3API7zjbhgX3iKDS7zmhfWFBDZcx:RuxkJTgip2PfcE3l73bOXSK+7afadcx
TLSH
T13C232C003BE8813BF2BE4F7899F26145467AF6636603D64E1CC442DB5623FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

s.damsex.blog:80
s.damsex.blog:22
s.damsex.blog:8080
s.damsex.blog:8880
s.damsex.blog:2052
s.damsex.blog:2082
s.damsex.blog:2086
s.damsex.blog:2095
s.damsex.blog:443
s.damsex.blog:2053
s.damsex.blog:2083
s.damsex.blog:2087
s.damsex.blog:2096
s.damsex.blog:8443
www.s.damsex.blog:80
www.s.damsex.blog:22
www.s.damsex.blog:8080
www.s.damsex.blog:8880
www.s.damsex.blog:2052
www.s.damsex.blog:2082
www.s.damsex.blog:2086
www.s.damsex.blog:2095
www.s.damsex.blog:443
www.s.damsex.blog:2053
www.s.damsex.blog:2083
www.s.damsex.blog:2087
www.s.damsex.blog:2096
www.s.damsex.blog:8443
mirai.s.damsex.blog:80
mirai.s.damsex.blog:22
mirai.s.damsex.blog:8080
mirai.s.damsex.blog:8880
mirai.s.damsex.blog:2052
mirai.s.damsex.blog:2082
mirai.s.damsex.blog:2086
mirai.s.damsex.blog:2095
mirai.s.damsex.blog:443
mirai.s.damsex.blog:2053
mirai.s.damsex.blog:2083
mirai.s.damsex.blog:2087
mirai.s.damsex.blog:2096
mirai.s.damsex.blog:8443
malware.s.damsex.blog:80
malware.s.damsex.blog:22
malware.s.damsex.blog:8080
malware.s.damsex.blog:8880
malware.s.damsex.blog:2052
malware.s.damsex.blog:2082
malware.s.damsex.blog:2086
malware.s.damsex.blog:2095
malware.s.damsex.blog:443
malware.s.damsex.blog:2053
malware.s.damsex.blog:2083
malware.s.damsex.blog:2087
malware.s.damsex.blog:2096
malware.s.damsex.blog:8443

Mutex

pJEVCbF83SCj

Attributes

delay
0
install
true
install_file
05jt82aw.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000024440-8.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-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe

Executes dropped EXE 2 IoCs

pid	Process
4836	05jt82aw.exe
2148	05jt82aw.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 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	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.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	05jt82aw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	05jt82aw.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5076	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
1744	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
Token: SeDebugPrivilege	4836	05jt82aw.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 5072	2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe	86
PID 2268 wrote to memory of 1200	2268	b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe	88
PID 1200 wrote to memory of 5076	1200	cmd.exe	90
PID 5072 wrote to memory of 1744	5072	cmd.exe	91
PID 1200 wrote to memory of 2148	1200	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe
"C:\Users\Admin\AppData\Local\Temp\b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "05jt82aw" /tr '"C:\Users\Admin\AppData\Roaming\05jt82aw.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5072
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "05jt82aw" /tr '"C:\Users\Admin\AppData\Roaming\05jt82aw.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1744
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6220.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1200
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5076
- - C:\Users\Admin\AppData\Roaming\05jt82aw.exe
    "C:\Users\Admin\AppData\Roaming\05jt82aw.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2148

C:\Users\Admin\AppData\Roaming\05jt82aw.exe
"C:\Users\Admin\AppData\Roaming\05jt82aw.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4836

Network

MITRE ATT&CK Enterprise v16

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

tmp6220.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6220.tmp.bat
Size 152B
SHA256 5a8d778282dd15fad6b11148c7cc4ca915058aeab14a7e4ba70156928e035c6d
MD5 5c12d2a78b2b9a624dbf139ed8429a4e
SHA1 0f8f931e8731f75b2666c09ce51f5310ea0684de
SHA512 97c33c89fb18058810cea9fa947a4c082cd846a6f2a118781094c6f2f54f7e1ca86b28c61c3746704158047a0710ab771f9a91db5e10858ca9689abed763e665
TLSH
T1A8C02B9291C5EF4F2905241702FBDECC9172AC193F80FB20C704400D23C0848F0D9345
MD5 SHA1 SHA512 TLSH

Submit Download

05jt82aw.exe

Path C:\Users\Admin\AppData\Roaming\05jt82aw.exe
Size 45KB
SHA256 b8d90cc23e159089a16544f33ee8aaac20cda484c88eb1dfcbc5ed1e44f706ef
MD5 e1243999f2233805206bec0d8454668c
SHA1 e1902e3e05a71c60137b8f1a89a38e924ff2acdd
SHA512 39ea0b0d9ae26210c0b67d74616e39dc72ef96330e39b568c8574ebef42dcc08699bc6ed015d04f9b38d4cba34ae53bf2adeebeffeded1bb89171981b4f19f34
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1umaPclm3API7zjbhgX3iKDS7zmhfWFBDZcx:RuxkJTgip2PfcE3l73bOXSK+7afadcx
TLSH
T13C232C003BE8813BF2BE4F7899F26145467AF6636603D64E1CC442DB5623FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2268-0-0x0000000000620000-0x0000000000632000-memory.dmp

Download

memory/2268-1-0x0000000005020000-0x0000000005030000-memory.dmp

Download

memory/2268-2-0x0000000005030000-0x00000000050CC000-memory.dmp

Download

memory/4836-10-0x0000000002540000-0x0000000002550000-memory.dmp

Download

memory/4836-13-0x0000000002540000-0x0000000002550000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads