asyncrat | a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

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/0x0007000000012118-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2884	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2972	cmd.exe

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

Web Service

T1102

flow	ioc
5	pastebin.com
4	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	schtasks.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	svchost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
568	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
1684	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
Token: SeDebugPrivilege	2884	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2692	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	31
PID 2532 wrote to memory of 2692	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	31
PID 2532 wrote to memory of 2692	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	31
PID 2532 wrote to memory of 2692	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	31
PID 2532 wrote to memory of 2972	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	33
PID 2532 wrote to memory of 2972	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	33
PID 2532 wrote to memory of 2972	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	33
PID 2532 wrote to memory of 2972	2532	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe	33
PID 2692 wrote to memory of 1684	2692	cmd.exe	35
PID 2692 wrote to memory of 1684	2692	cmd.exe	35
PID 2692 wrote to memory of 1684	2692	cmd.exe	35
PID 2692 wrote to memory of 1684	2692	cmd.exe	35
PID 2972 wrote to memory of 568	2972	cmd.exe	36
PID 2972 wrote to memory of 568	2972	cmd.exe	36
PID 2972 wrote to memory of 568	2972	cmd.exe	36
PID 2972 wrote to memory of 568	2972	cmd.exe	36
PID 2972 wrote to memory of 2884	2972	cmd.exe	37
PID 2972 wrote to memory of 2884	2972	cmd.exe	37
PID 2972 wrote to memory of 2884	2972	cmd.exe	37
PID 2972 wrote to memory of 2884	2972	cmd.exe	37

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:2532
- 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:2692
- - 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:1684
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDECB.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:568
- - 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:2884

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\tmpDECB.tmp.bat

Filesize
151B

MD5
9041eecd9987871f0d1e1f0a25454641

SHA1
378ec80dcb4463f06a7ccfbc22c9eafcc583c1fb

SHA256
970cf36b571c320a5b2f32929afb7b1eeecb255e7f10f3f7a50a19cf42bcc96f

SHA512
ba2bc55192d2ac73204f7b89ffb95ca618284b21c395e425a115224f4352db0b6b6f94323add9f4ca754b07fbddcf977db2679c0d66dfd815f50ce3acee0628d

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

Filesize
45KB

MD5
66e220b33b24bec99a124bf81f5cbee1

SHA1
147c16eb7bdf357f5061d2acb28736c5d49a0bdb

SHA256
a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

SHA512
30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3

Download Submit
memory/2532-1-0x0000000000E50000-0x0000000000E62000-memory.dmp

Filesize
72KB

Download
memory/2532-0-0x0000000074CCE000-0x0000000074CCF000-memory.dmp

Filesize
4KB

Download
memory/2532-2-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2532-11-0x0000000074CC0000-0x00000000753AE000-memory.dmp

Filesize
6.9MB

Download
memory/2884-16-0x00000000013D0000-0x00000000013E2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads