asyncrat | 60071c6368126a49461b2bb1b53c0a3547150c045a75363ee2c6ee038fa3ca48

General

Target

a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
Size

45KB
MD5

66e220b33b24bec99a124bf81f5cbee1
SHA1

147c16eb7bdf357f5061d2acb28736c5d49a0bdb
SHA256

a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c
SHA512

30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3
SSDEEP

768:5uiGNTdFHLBWUZiGrmo2qrrKjGKG6PIyzjbFgX3iFV7wtzuQ66cB2bkBDZyu:5uiGNTdBR2mKYDy3bCXSX7wtzuQMySd7

Score

10^/10

asyncrat discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
svchost.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/bHKKgu6n

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/0x0009000000012286-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2676	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2860	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
2	pastebin.com
3	pastebin.com

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	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.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	svchost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2648	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
2768	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
Token: SeDebugPrivilege	2676	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2892 wrote to memory of 2900	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	30
PID 2892 wrote to memory of 2900	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	30
PID 2892 wrote to memory of 2900	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	30
PID 2892 wrote to memory of 2900	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	30
PID 2892 wrote to memory of 2860	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	32
PID 2892 wrote to memory of 2860	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	32
PID 2892 wrote to memory of 2860	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	32
PID 2892 wrote to memory of 2860	2892	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	32
PID 2900 wrote to memory of 2768	2900	cmd.exe	34
PID 2900 wrote to memory of 2768	2900	cmd.exe	34
PID 2900 wrote to memory of 2768	2900	cmd.exe	34
PID 2900 wrote to memory of 2768	2900	cmd.exe	34
PID 2860 wrote to memory of 2648	2860	cmd.exe	35
PID 2860 wrote to memory of 2648	2860	cmd.exe	35
PID 2860 wrote to memory of 2648	2860	cmd.exe	35
PID 2860 wrote to memory of 2648	2860	cmd.exe	35
PID 2860 wrote to memory of 2676	2860	cmd.exe	36
PID 2860 wrote to memory of 2676	2860	cmd.exe	36
PID 2860 wrote to memory of 2676	2860	cmd.exe	36
PID 2860 wrote to memory of 2676	2860	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
"C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2892
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2900
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2768
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8527.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2648
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2676

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8527.tmp.bat

Filesize
151B

MD5
0448c19ec5d02c04c3a39855cc173924

SHA1
802b8195095fb59f74d8b24db8f376e2f5510ace

SHA256
e62eeed1bb3b3b5dd3ce07bd814ae540cba7f4c8656c3f366fa50339425d13e1

SHA512
bb013f73eb122137acf47fa5c784f17a4a8b130cd8d5ef3006f8b6dea61e5c0a36bb1535c4209fcbb15995a779a5d9255fdac896e6ad893d4d97ce40b064e03a

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

Filesize
45KB

MD5
66e220b33b24bec99a124bf81f5cbee1

SHA1
147c16eb7bdf357f5061d2acb28736c5d49a0bdb

SHA256
a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

SHA512
30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3

Download Submit
memory/2676-16-0x0000000000BD0000-0x0000000000BE2000-memory.dmp

Filesize
72KB

Download
memory/2892-0-0x0000000074C2E000-0x0000000074C2F000-memory.dmp

Filesize
4KB

Download
memory/2892-1-0x0000000000AB0000-0x0000000000AC2000-memory.dmp

Filesize
72KB

Download
memory/2892-2-0x0000000074C20000-0x000000007530E000-memory.dmp

Filesize
6.9MB

Download
memory/2892-12-0x0000000074C20000-0x000000007530E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads