asyncrat | a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

General

Target

a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
Size

45KB
MD5

66e220b33b24bec99a124bf81f5cbee1
SHA1

147c16eb7bdf357f5061d2acb28736c5d49a0bdb
SHA256

a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c
SHA512

30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3
SSDEEP

768:5uiGNTdFHLBWUZiGrmo2qrrKjGKG6PIyzjbFgX3iFV7wtzuQ66cB2bkBDZyu:5uiGNTdBR2mKYDy3bCXSX7wtzuQMySd7

Score

10^/10

asyncrat credential_access discovery rat spyware stealer

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/0x000900000001227c-13.dat	family_asyncrat

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Executes dropped EXE 1 IoCs

pid	Process
2740	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2468	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2860	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
2304	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
Token: SeDebugPrivilege	2740	svchost.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 2564	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	29
PID 2364 wrote to memory of 2564	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	29
PID 2364 wrote to memory of 2564	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	29
PID 2364 wrote to memory of 2564	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	29
PID 2364 wrote to memory of 2468	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	31
PID 2364 wrote to memory of 2468	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	31
PID 2364 wrote to memory of 2468	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	31
PID 2364 wrote to memory of 2468	2364	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	31
PID 2564 wrote to memory of 2304	2564	cmd.exe	33
PID 2564 wrote to memory of 2304	2564	cmd.exe	33
PID 2564 wrote to memory of 2304	2564	cmd.exe	33
PID 2564 wrote to memory of 2304	2564	cmd.exe	33
PID 2468 wrote to memory of 2860	2468	cmd.exe	34
PID 2468 wrote to memory of 2860	2468	cmd.exe	34
PID 2468 wrote to memory of 2860	2468	cmd.exe	34
PID 2468 wrote to memory of 2860	2468	cmd.exe	34
PID 2468 wrote to memory of 2740	2468	cmd.exe	35
PID 2468 wrote to memory of 2740	2468	cmd.exe	35
PID 2468 wrote to memory of 2740	2468	cmd.exe	35
PID 2468 wrote to memory of 2740	2468	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
"C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2364
- 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:2564
- - 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:2304
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp140D.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2860
- - 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:2740

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

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab37D4.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar76CA.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp140D.tmp.bat

Filesize
151B

MD5
ae31623ed7caf33051da0d28ae3ea3de

SHA1
09721daf55695950596ac79ce4a3a3d4a6a9195f

SHA256
030e64e2521b5feb294f675dc0537a69c63cf959766c02ea76b5a186e5d43589

SHA512
f1a522326a463e7ff3d4f7dce7cd6335c0dd9995bbdb88a88e956fe9bb70b2f84957a69017cfec40af14eab121f90df80c020aca6adb30893c031d79b9ab4d27

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

Filesize
45KB

MD5
66e220b33b24bec99a124bf81f5cbee1

SHA1
147c16eb7bdf357f5061d2acb28736c5d49a0bdb

SHA256
a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

SHA512
30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3

Download Submit
memory/2364-0-0x0000000073B6E000-0x0000000073B6F000-memory.dmp

Filesize
4KB

Download
memory/2364-11-0x0000000073B60000-0x000000007424E000-memory.dmp

Filesize
6.9MB

Download
memory/2364-2-0x0000000073B60000-0x000000007424E000-memory.dmp

Filesize
6.9MB

Download
memory/2364-1-0x00000000002E0000-0x00000000002F2000-memory.dmp

Filesize
72KB

Download
memory/2740-16-0x0000000000D90000-0x0000000000DA2000-memory.dmp

Filesize
72KB

Download
memory/2740-33-0x0000000006450000-0x00000000064CE000-memory.dmp

Filesize
504KB

Download
memory/2740-52-0x0000000000980000-0x000000000098A000-memory.dmp

Filesize
40KB

Download
memory/2740-53-0x00000000065E0000-0x0000000006670000-memory.dmp

Filesize
576KB

Download
memory/2740-54-0x0000000006670000-0x00000000066D0000-memory.dmp

Filesize
384KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads