asyncrat | 8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc

General

Target
8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
Size 45KB
Sample260804-rtsdmscc53
SHA256 8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc
MD5 f576f64b89f2b60e82d496a92e496207
SHA1 e3b64caf49c1df7aa3433a6bb49fcb3a16b3f509
SHA512 5780e4b19a215755d1a38517cfe3487da14e94350692903b9645b2f2ced38ea031e683f93707eee873dc4159d7e1b566ee229fdd77ff12cbb9779e39705c9466
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlLlsHoPEaMPIGujbngX3iI7mZounPZPL6sA5TYOE:wuDWZTpMZSB2OuuEaxGCbgXSno2esAt2
TLSH
T180233A003BE8822BF2BE4FB899F26105867AF5737603D54A1CC4519B5723FC696426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

haysexcdn.net:80
haysexcdn.net:22
haysexcdn.net:8080
haysexcdn.net:8880
haysexcdn.net:2052
haysexcdn.net:2082
haysexcdn.net:2086
haysexcdn.net:2095
haysexcdn.net:443
haysexcdn.net:2053
haysexcdn.net:2083
haysexcdn.net:2087
haysexcdn.net:2096
haysexcdn.net:8443
www.haysexcdn.net:80
www.haysexcdn.net:22
www.haysexcdn.net:8080
www.haysexcdn.net:8880
www.haysexcdn.net:2052
www.haysexcdn.net:2082
www.haysexcdn.net:2086
www.haysexcdn.net:2095
www.haysexcdn.net:443
www.haysexcdn.net:2053
www.haysexcdn.net:2083
www.haysexcdn.net:2087
www.haysexcdn.net:2096
www.haysexcdn.net:8443
dridex.haysexcdn.net:80
dridex.haysexcdn.net:22
dridex.haysexcdn.net:8080
dridex.haysexcdn.net:8880
dridex.haysexcdn.net:2052
dridex.haysexcdn.net:2082
dridex.haysexcdn.net:2086
dridex.haysexcdn.net:2095
dridex.haysexcdn.net:443
dridex.haysexcdn.net:2053
dridex.haysexcdn.net:2083
dridex.haysexcdn.net:2087
dridex.haysexcdn.net:2096
dridex.haysexcdn.net:8443
hacker.haysexcdn.net:80
hacker.haysexcdn.net:22
hacker.haysexcdn.net:8080
hacker.haysexcdn.net:8880
hacker.haysexcdn.net:2052
hacker.haysexcdn.net:2082
hacker.haysexcdn.net:2086
hacker.haysexcdn.net:2095
hacker.haysexcdn.net:443
hacker.haysexcdn.net:2053
hacker.haysexcdn.net:2083
hacker.haysexcdn.net:2087
hacker.haysexcdn.net:2096
hacker.haysexcdn.net:8443

Mutex

W0f1Cd6hPBdt

Attributes

delay
0
install
true
install_file
9bf3c.exe
install_folder
%AppData%

aes.plain

Signatures

Family: AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x00030000000233a3-8.dat	family_asyncrat
behavioral1/memory/1740-13-0x0000000005780000-0x0000000005790000-memory.dmp	family_asyncrat

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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe

Executes dropped EXE 2 IoCs

pid	Process
1740	9bf3c.exe
1920	9bf3c.exe

Outbound SSH connection to public host 2 TTPs 3 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	17	172.67.73.19:22	1740	9bf3c.exe
SSH destination	30	104.26.5.211:22	1740	9bf3c.exe
SSH destination	44	104.26.4.211:22	1740	9bf3c.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
6104	cmd.exe
2696	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.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	9bf3c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9bf3c.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1668	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
4780	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
Token: SeDebugPrivilege	1740	9bf3c.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4772 wrote to memory of 6104	4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe	86
PID 4772 wrote to memory of 2696	4772	8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe	88
PID 2696 wrote to memory of 1668	2696	cmd.exe	90
PID 6104 wrote to memory of 4780	6104	cmd.exe	91
PID 2696 wrote to memory of 1920	2696	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe
"C:\Users\Admin\AppData\Local\Temp\8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "9bf3c" /tr '"C:\Users\Admin\AppData\Roaming\9bf3c.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6104
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "9bf3c" /tr '"C:\Users\Admin\AppData\Roaming\9bf3c.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4780
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCAD.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2696
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1668
- - C:\Users\Admin\AppData\Roaming\9bf3c.exe
    "C:\Users\Admin\AppData\Roaming\9bf3c.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1920

C:\Users\Admin\AppData\Roaming\9bf3c.exe
"C:\Users\Admin\AppData\Roaming\9bf3c.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1740

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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Downloads

tmpCAD.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpCAD.tmp.bat
Size 148B
SHA256 226981db0a3225a32e61d285062b8bdb462282d6116a56965cf9ce98c1d4f4f5
MD5 a05223fce5b05a935268e97f77e13602
SHA1 58bff333deb57457876c16e5e4c4ec2494f11b15
SHA512 6d7b434ce58978f3e1556530779a230a288d30e02494e2fe36482aaed6c221f76cc5c31f5ed63673b5b6447cebcaa959403b23ef030f778f94d2b7d0c3fa5f03
TLSH
T13BC02B4251C6EF4E3D06581322FAD48CA1F2AD193F44BF00C30C840D5A80448F0DA341
MD5 SHA1 SHA512 TLSH

Submit Download

9bf3c.exe

Path C:\Users\Admin\AppData\Roaming\9bf3c.exe
Size 45KB
SHA256 8d64c0369bc8cf75ddd9c833b33af0e49c6f78322c2fdaa017257f5cc00481cc
MD5 f576f64b89f2b60e82d496a92e496207
SHA1 e3b64caf49c1df7aa3433a6bb49fcb3a16b3f509
SHA512 5780e4b19a215755d1a38517cfe3487da14e94350692903b9645b2f2ced38ea031e683f93707eee873dc4159d7e1b566ee229fdd77ff12cbb9779e39705c9466
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlLlsHoPEaMPIGujbngX3iI7mZounPZPL6sA5TYOE:wuDWZTpMZSB2OuuEaxGCbgXSno2esAt2
TLSH
T180233A003BE8822BF2BE4FB899F26105867AF5737603D54A1CC4519B5723FC696426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1740-10-0x0000000005780000-0x0000000005790000-memory.dmp

Download

memory/1740-13-0x0000000005780000-0x0000000005790000-memory.dmp

Download

memory/4772-0-0x00000000003D0000-0x00000000003E2000-memory.dmp

Download

memory/4772-1-0x0000000004D20000-0x0000000004D30000-memory.dmp

Download

memory/4772-2-0x0000000004DD0000-0x0000000004E6C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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