asyncrat | 26eaa5bce06cadc54cb4990fabb1b9150966ef720b07a836ef2bd456360246b2

General

Target

0x000c0000000193df-60.exe
Size

45KB
MD5

a44a767dba207c04c74afae17144f787
SHA1

fa14f38216e259be5b181c825719f1c864691a5f
SHA256

26eaa5bce06cadc54cb4990fabb1b9150966ef720b07a836ef2bd456360246b2
SHA512

7dfd6e182ac9f16b29843cb0eabaa7db02fa3ee59c65c7822d9213859c4a7185d0fdcd1d51747a11b4fdd3a7947ea14fdc7fa583c13b4d3edf50b8d6d3178619
SSDEEP

768:Pu201T1tMfdWUdLO3mo2qz5qKjPGaG6PIyzjbFgX3i9B0OoEmRtBDZWy:Pu201T1y22sqKTkDy3bCXS9B0OoEmRjV

Score

10^/10

asyncrat discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

C2

blue.o7lab.me:7777

server.underground-cheat.xyz:7777

Mutex

RPYntXGt1eJi

Attributes

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

aes.plain

Signatures

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/0x00090000000120f9-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2696	WinUpdate.exe

Loads dropped DLL 1 IoCs

pid	Process
2540	cmd.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	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	WinUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0x000c0000000193df-60.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2752	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
2692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2196	0x000c0000000193df-60.exe
2196	0x000c0000000193df-60.exe
2196	0x000c0000000193df-60.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2196	0x000c0000000193df-60.exe
Token: SeDebugPrivilege	2696	WinUpdate.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2784	2196	0x000c0000000193df-60.exe	30
PID 2196 wrote to memory of 2784	2196	0x000c0000000193df-60.exe	30
PID 2196 wrote to memory of 2784	2196	0x000c0000000193df-60.exe	30
PID 2196 wrote to memory of 2784	2196	0x000c0000000193df-60.exe	30
PID 2196 wrote to memory of 2540	2196	0x000c0000000193df-60.exe	32
PID 2196 wrote to memory of 2540	2196	0x000c0000000193df-60.exe	32
PID 2196 wrote to memory of 2540	2196	0x000c0000000193df-60.exe	32
PID 2196 wrote to memory of 2540	2196	0x000c0000000193df-60.exe	32
PID 2784 wrote to memory of 2692	2784	cmd.exe	34
PID 2784 wrote to memory of 2692	2784	cmd.exe	34
PID 2784 wrote to memory of 2692	2784	cmd.exe	34
PID 2784 wrote to memory of 2692	2784	cmd.exe	34
PID 2540 wrote to memory of 2752	2540	cmd.exe	35
PID 2540 wrote to memory of 2752	2540	cmd.exe	35
PID 2540 wrote to memory of 2752	2540	cmd.exe	35
PID 2540 wrote to memory of 2752	2540	cmd.exe	35
PID 2540 wrote to memory of 2696	2540	cmd.exe	36
PID 2540 wrote to memory of 2696	2540	cmd.exe	36
PID 2540 wrote to memory of 2696	2540	cmd.exe	36
PID 2540 wrote to memory of 2696	2540	cmd.exe	36
PID 2540 wrote to memory of 2696	2540	cmd.exe	36
PID 2540 wrote to memory of 2696	2540	cmd.exe	36
PID 2540 wrote to memory of 2696	2540	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\0x000c0000000193df-60.exe
"C:\Users\Admin\AppData\Local\Temp\0x000c0000000193df-60.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2784
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "WinUpdate" /tr '"C:\Users\Admin\AppData\Roaming\WinUpdate.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2692
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4412.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2752
- - C:\Users\Admin\AppData\Roaming\WinUpdate.exe
    "C:\Users\Admin\AppData\Roaming\WinUpdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2696

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\Temp\tmp4412.tmp.bat

Filesize
153B

MD5
8758bcf58c75c94e78eb4b4fff6328e6

SHA1
9c7a16582a7e433a9b081f340c2cbe0ab401945c

SHA256
e6da63b08395fb4849a9540f1087b7645fe261d7b6c6273fbab0beb2ad9757b6

SHA512
23b56ce46934e4aaa0f9cf5af384d47be7cabe53f10c26a0c8d0c142b5dc28f37a8e8e55520a1e91607119b228a71cc24363697012c1bd3676509345510c15aa

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

Filesize
45KB

MD5
a44a767dba207c04c74afae17144f787

SHA1
fa14f38216e259be5b181c825719f1c864691a5f

SHA256
26eaa5bce06cadc54cb4990fabb1b9150966ef720b07a836ef2bd456360246b2

SHA512
7dfd6e182ac9f16b29843cb0eabaa7db02fa3ee59c65c7822d9213859c4a7185d0fdcd1d51747a11b4fdd3a7947ea14fdc7fa583c13b4d3edf50b8d6d3178619

Download Submit
memory/2196-0-0x0000000073E6E000-0x0000000073E6F000-memory.dmp

Filesize
4KB

Download
memory/2196-1-0x00000000012A0000-0x00000000012B2000-memory.dmp

Filesize
72KB

Download
memory/2196-2-0x0000000073E60000-0x000000007454E000-memory.dmp

Filesize
6.9MB

Download
memory/2196-12-0x0000000073E60000-0x000000007454E000-memory.dmp

Filesize
6.9MB

Download
memory/2696-16-0x0000000001210000-0x0000000001222000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads