asyncrat | 2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517

General

Target
2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
Size 45KB
Sample260531-pyzbmsaz5p
SHA256 2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517
MD5 d3c4eff9c508e6b07de1330e77f2eaaf
SHA1 c8a508188126cf7e61a2ab19b272c1a64028fd48
SHA512 d50146e10402754b3358259d62119de8bf31c5bc0c331669519d91b0905bf8895561866f1b2f199044a55cf2b2cd42765331d757f141c94a3d0c6863f872a964
SSDEEP 768:xuntVTRst9nWUbUNlmo2q9aCfwTMjPIqEjbtgX3iQB5zkQprUNUNApBDZzx:xuntVTR602N91qEb6XSQBtkQiNiWdzx
TLSH
T1C7232C003BE8812BF2BE4B78ADF26145867AF2673603E54E2CC4519B5713FC696426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

chongtoico.media:443
chongtoico.media:80
chongtoico.media:7797
chongtoico.media:8707
chongtoico.media:6620
www.chongtoico.media:443
www.chongtoico.media:80
www.chongtoico.media:7797
www.chongtoico.media:8707
www.chongtoico.media:6620
gh0st.chongtoico.media:443
gh0st.chongtoico.media:80
gh0st.chongtoico.media:7797
gh0st.chongtoico.media:8707
gh0st.chongtoico.media:6620
cl0p.chongtoico.media:443
cl0p.chongtoico.media:80
cl0p.chongtoico.media:7797
cl0p.chongtoico.media:8707
cl0p.chongtoico.media:6620

Mutex

YIYFnjc5jdb1

Attributes

delay
0
install
true
install_file
rzk196.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 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x002000000002b2c2-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2236	rzk196.exe
1304	rzk196.exe

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 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	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.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	rzk196.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rzk196.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1892	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
1852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
Token: SeDebugPrivilege	2236	rzk196.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4624 wrote to memory of 2668	4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe	80
PID 4624 wrote to memory of 1288	4624	2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe	81
PID 2668 wrote to memory of 1852	2668	cmd.exe	84
PID 1288 wrote to memory of 1892	1288	cmd.exe	85
PID 1288 wrote to memory of 1304	1288	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe
"C:\Users\Admin\AppData\Local\Temp\2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "rzk196" /tr '"C:\Users\Admin\AppData\Roaming\rzk196.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "rzk196" /tr '"C:\Users\Admin\AppData\Roaming\rzk196.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1852
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp942.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1288
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1892
- - C:\Users\Admin\AppData\Roaming\rzk196.exe
    "C:\Users\Admin\AppData\Roaming\rzk196.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1304

C:\Users\Admin\AppData\Roaming\rzk196.exe
"C:\Users\Admin\AppData\Roaming\rzk196.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2236

Network

MITRE ATT&CK Enterprise v16

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

Exfiltration

Impact

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Downloads

tmp942.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp942.tmp.bat
Size 149B
SHA256 e26223715d7cd8a9ecc4f792bb10ff793b77cd16185023d5e20f85274c567e68
MD5 10ac9c0ccbcd444dbffcb5a8f64e3e52
SHA1 24bc25ea63e82dbe2ad8b8f3c388d54201379bee
SHA512 163235e9b377efced6b1380c7aff5a5dfda84bf52c10ff8bfa6cde54fe99553bde10d806de5a47ef291d53cd3dc718dea773d2dd4f13f869bd03e268d8dedb7e
TLSH
T137C02BD2A1C5EE0E6C0924230AFBE4CE91776D1A3F80BB40D344405D2680448F0DD381
MD5 SHA1 SHA512 TLSH

Submit Download

rzk196.exe

Path C:\Users\Admin\AppData\Roaming\rzk196.exe
Size 45KB
SHA256 2437bdc5baeab53eb537e31d5cc8f74521393ed3daffd9c8180301fd7f5dc517
MD5 d3c4eff9c508e6b07de1330e77f2eaaf
SHA1 c8a508188126cf7e61a2ab19b272c1a64028fd48
SHA512 d50146e10402754b3358259d62119de8bf31c5bc0c331669519d91b0905bf8895561866f1b2f199044a55cf2b2cd42765331d757f141c94a3d0c6863f872a964
SSDEEP 768:xuntVTRst9nWUbUNlmo2q9aCfwTMjPIqEjbtgX3iQB5zkQprUNUNApBDZzx:xuntVTR602N91qEb6XSQBtkQiNiWdzx
TLSH
T1C7232C003BE8812BF2BE4B78ADF26145867AF2673603E54E2CC4519B5713FC696426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4624-0-0x00000000001D0000-0x00000000001E2000-memory.dmp

Download

memory/4624-1-0x0000000004C10000-0x0000000004C20000-memory.dmp

Download

memory/4624-2-0x0000000004CC0000-0x0000000004D5C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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