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
behavioral2/files/0x000a00000001e5ff-11.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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe

Executes dropped EXE 1 IoCs

pid	Process
2264	svchost.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
22	pastebin.com
21	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	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.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	schtasks.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
808	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
4808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
Token: SeDebugPrivilege	2264	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 4464	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	89
PID 2128 wrote to memory of 4464	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	89
PID 2128 wrote to memory of 4464	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	89
PID 2128 wrote to memory of 3560	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	91
PID 2128 wrote to memory of 3560	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	91
PID 2128 wrote to memory of 3560	2128	a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe	91
PID 4464 wrote to memory of 4808	4464	cmd.exe	93
PID 4464 wrote to memory of 4808	4464	cmd.exe	93
PID 4464 wrote to memory of 4808	4464	cmd.exe	93
PID 3560 wrote to memory of 808	3560	cmd.exe	94
PID 3560 wrote to memory of 808	3560	cmd.exe	94
PID 3560 wrote to memory of 808	3560	cmd.exe	94
PID 3560 wrote to memory of 2264	3560	cmd.exe	99
PID 3560 wrote to memory of 2264	3560	cmd.exe	99
PID 3560 wrote to memory of 2264	3560	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe
"C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2128
- 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:4464
- - 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:4808
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF925.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3560
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:808
- - 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:2264

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

Query Registry

1

T1012

System Information Discovery

2

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\tmpF925.tmp.bat

Filesize
151B

MD5
5483ce91045e59b3524f62e2e0d78a6f

SHA1
012d390360a12659c4079bc1efdc4fb3a7032797

SHA256
7db814b824cd94531383b8917c1c9bc8618b0e9bcd611c547d964ad13a6ae1c1

SHA512
adcba369f8f74ec25fce84021b1fa4e90c860f705d54341d09379671765fe4b0aac3734546ae57d77343ad0c629e16b91d156d867593dbaebd6f0e268811afe2

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

Filesize
45KB

MD5
66e220b33b24bec99a124bf81f5cbee1

SHA1
147c16eb7bdf357f5061d2acb28736c5d49a0bdb

SHA256
a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

SHA512
30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3

Download Submit
memory/2128-0-0x000000007461E000-0x000000007461F000-memory.dmp

Filesize
4KB

Download
memory/2128-1-0x0000000000600000-0x0000000000612000-memory.dmp

Filesize
72KB

Download
memory/2128-2-0x0000000074610000-0x0000000074DC0000-memory.dmp

Filesize
7.7MB

Download
memory/2128-3-0x0000000004F80000-0x000000000501C000-memory.dmp

Filesize
624KB

Download
memory/2128-9-0x0000000074610000-0x0000000074DC0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-16-0x00000000065B0000-0x0000000006B54000-memory.dmp

Filesize
5.6MB

Download
memory/2264-13-0x0000000074610000-0x0000000074DC0000-memory.dmp

Filesize
7.7MB

Download
memory/2264-17-0x0000000005BB0000-0x0000000005C16000-memory.dmp

Filesize
408KB

Download
memory/2264-18-0x0000000007020000-0x0000000007096000-memory.dmp

Filesize
472KB

Download
memory/2264-19-0x0000000006FA0000-0x000000000701E000-memory.dmp

Filesize
504KB

Download
memory/2264-20-0x00000000070C0000-0x00000000070DE000-memory.dmp

Filesize
120KB

Download
memory/2264-21-0x0000000007100000-0x0000000007454000-memory.dmp

Filesize
3.3MB

Download
memory/2264-22-0x0000000007500000-0x000000000750A000-memory.dmp

Filesize
40KB

Download
memory/2264-23-0x0000000007520000-0x00000000075B0000-memory.dmp

Filesize
576KB

Download
memory/2264-24-0x0000000007710000-0x0000000007770000-memory.dmp

Filesize
384KB

Download
memory/2264-25-0x0000000007770000-0x00000000077BC000-memory.dmp

Filesize
304KB

Download
memory/2264-26-0x0000000074610000-0x0000000074DC0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads