asyncrat | 153903ef9470b33c66998fba77882860eec6b5cbfcb89e2cf67a42bd480480d5

General

Target
MIa5QMn35O.exe
Size 45KB
Sample260605-tzkbbsa16x
SHA256 153903ef9470b33c66998fba77882860eec6b5cbfcb89e2cf67a42bd480480d5
MD5 0b63dbca8edfe19a8e92bfb6509854b6
SHA1 9140b6de57da91048eb65f9e2294e8a9abf4fc8a
SHA512 0b698d533bddabf1bced55060645c34bb92b7bfc209af465d013754c8a3f71020ab7c187475d6d78c369fede4d297a60b27b57cb099a54accbd0bf14ee5ed562
SSDEEP 768:EutNpTw80YYWUisiOmo2qNAUTCCVx1FXHhPIOYjbbgX3iul7nOj/Ydj2kp1BDZsx:EutNpTwrJ2diYOQbkXSuFnw/i2kpbdsx
TLSH
T1E823190037E9812BF2BE8F78ADF26145867AF6632603D64E1CC441DB1613FC696526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

admin defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Admin

C2

80.96.109.44:80
80.96.109.44:443
www.spica.jp.net:80
www.spica.jp.net:443
spica.jp.net:80
spica.jp.net:443
rat.spica.jp.net:80
rat.spica.jp.net:443
malware.spica.jp.net:80
malware.spica.jp.net:443
aaa.spica.jp.net:80
aaa.spica.jp.net:443
site.spica.jp.net:80
site.spica.jp.net:443
domain.spica.jp.net:80
domain.spica.jp.net:443
mail.spica.jp.net:80
mail.spica.jp.net:443

Mutex

cvKWCzGdTJV4

Attributes

delay
3
install
true
install_file
MIa5QMn35O.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
behavioral2/files/0x001a00000002b4ba-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1648	MIa5QMn35O.exe
956	MIa5QMn35O.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	MIa5QMn35O.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	MIa5QMn35O.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MIa5QMn35O.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4888	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
5112	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe
4048	MIa5QMn35O.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4048	MIa5QMn35O.exe
Token: SeDebugPrivilege	1648	MIa5QMn35O.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4048 wrote to memory of 3372	4048	MIa5QMn35O.exe	80
PID 4048 wrote to memory of 4332	4048	MIa5QMn35O.exe	82
PID 4332 wrote to memory of 4888	4332	cmd.exe	84
PID 3372 wrote to memory of 5112	3372	cmd.exe	85
PID 4332 wrote to memory of 956	4332	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\MIa5QMn35O.exe
"C:\Users\Admin\AppData\Local\Temp\MIa5QMn35O.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4048
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MIa5QMn35O" /tr '"C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3372
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "MIa5QMn35O" /tr '"C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5112
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1E22.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4332
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4888
- - C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe
    "C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:956

C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe
"C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1648

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

MIa5QMn35O.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\MIa5QMn35O.exe.log
Size 522B
SHA256 3a8c487575696f7ace931dc220c85a47d33e0ead96aa9e47c705fee5dfac667a
MD5 db9f45365506c49961bfaf3be1475ad2
SHA1 6bd7222f7b7e3e9685207cb285091c92728168e4
SHA512 807028e2aed5b25b2d19ec4f09867746456de4e506c90c73e6730b35303511349a79ca0b9290509664edc0433d47e3fc7f2661534293ebb82185b1494da86a41
TLSH
T10DF09E303231B1D848023F42181C7A8942EF0746B7B8DF2D3650231EDC350176F212E3
MD5 SHA1 SHA512 TLSH

Submit Download

tmp1E22.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1E22.tmp.bat
Size 154B
SHA256 a775ccadca01790a1047ff72b14484b216354f235416423ea39af2ab6c8920a4
MD5 346dcaaa96734f0cf1e797430223838a
SHA1 9b583668534b76218f36a7e64229560bc798de80
SHA512 79aecb263fa132b845bce7502ea03573d057413a0fb6fa9586501b2716faeaccb26ab0bf120bbb3457679fc7903d1a05da3cee1efdc236e429ad41d1fcfb7336
TLSH
T132C08C8695C6AB0E280E541306FAD48C917A6C593F40AB40874840196280448F099342
MD5 SHA1 SHA512 TLSH

Submit Download

MIa5QMn35O.exe

Path C:\Users\Admin\AppData\Roaming\MIa5QMn35O.exe
Size 45KB
SHA256 153903ef9470b33c66998fba77882860eec6b5cbfcb89e2cf67a42bd480480d5
MD5 0b63dbca8edfe19a8e92bfb6509854b6
SHA1 9140b6de57da91048eb65f9e2294e8a9abf4fc8a
SHA512 0b698d533bddabf1bced55060645c34bb92b7bfc209af465d013754c8a3f71020ab7c187475d6d78c369fede4d297a60b27b57cb099a54accbd0bf14ee5ed562
SSDEEP 768:EutNpTw80YYWUisiOmo2qNAUTCCVx1FXHhPIOYjbbgX3iul7nOj/Ydj2kp1BDZsx:EutNpTwrJ2diYOQbkXSuFnw/i2kpbdsx
TLSH
T1E823190037E9812BF2BE8F78ADF26145867AF6632603D64E1CC441DB1613FC696526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4048-0-0x0000000000310000-0x0000000000322000-memory.dmp

Download

memory/4048-1-0x0000000004E10000-0x0000000004E20000-memory.dmp

Download

memory/4048-2-0x0000000004E20000-0x0000000004EBC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads