asyncrat | 4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543

General

Target
4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
Size 45KB
Sample260529-gfp19adx21
SHA256 4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543
MD5 1aabd3c5732ff17ff8a7877c81c3e136
SHA1 3159976b60986be577f65550c41aeefc8d746426
SHA512 a61328f16c3e786761fade8104bd602170ce2725702a72c59d55d5b647ed151dd4a27e34023a48fff2a8ca52cc725a72d7a24d997ef9c865fd46524156168d04
SSDEEP 768:BuPi1TVF5l6NWUtb2Hmo2qI43FoDEaOPIczjbigX3iGc8nH+FdQWYJBDZjx:BuPi1TV/l12e6Ea3c3bFXSS4dQWodjx
TLSH
T195231B003BE8822BF2BE5F7899F26145457AF6A32603D5492CC441DB5713BC69A42AFE
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

javviet.blog:443
javviet.blog:80
javviet.blog:7797
javviet.blog:8707
javviet.blog:6620
www.javviet.blog:443
www.javviet.blog:80
www.javviet.blog:7797
www.javviet.blog:8707
www.javviet.blog:6620
connect.javviet.blog:443
connect.javviet.blog:80
connect.javviet.blog:7797
connect.javviet.blog:8707
connect.javviet.blog:6620
cl0p.javviet.blog:443
cl0p.javviet.blog:80
cl0p.javviet.blog:7797
cl0p.javviet.blog:8707
cl0p.javviet.blog:6620

Mutex

gRewFnNq9bJz

Attributes

delay
0
install
true
install_file
oh434.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/0x001a00000002b4a5-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
904	oh434.exe
5736	oh434.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	oh434.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	oh434.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4432	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
3484	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
Token: SeDebugPrivilege	904	oh434.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3208 wrote to memory of 2736	3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe	79
PID 3208 wrote to memory of 5044	3208	4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe	81
PID 2736 wrote to memory of 3484	2736	cmd.exe	83
PID 5044 wrote to memory of 4432	5044	cmd.exe	84
PID 5044 wrote to memory of 5736	5044	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe
"C:\Users\Admin\AppData\Local\Temp\4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "oh434" /tr '"C:\Users\Admin\AppData\Roaming\oh434.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "oh434" /tr '"C:\Users\Admin\AppData\Roaming\oh434.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3484
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC9F7.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5044
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4432
- - C:\Users\Admin\AppData\Roaming\oh434.exe
    "C:\Users\Admin\AppData\Roaming\oh434.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5736

C:\Users\Admin\AppData\Roaming\oh434.exe
"C:\Users\Admin\AppData\Roaming\oh434.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:904

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

tmpC9F7.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpC9F7.tmp.bat
Size 149B
SHA256 c54ebcd1becf017114dbd12a5ad4314f5b4fd576777701bc502aee14518fc970
MD5 c42a3b904df731d7849dc279fbce82f6
SHA1 256855279995338ef108beed63641bf3298adc0a
SHA512 65fffe0aeb73f8fa6e104ec11b40e7972dd9b8f933529150c46f1ee1c2c9a6b847133a3c15feab0737b79494ef4e1da5bebde46e9e5fd980fbac6fa84e9f198e
TLSH
T160C02B8251C5FE4E2D0524330AFAD88C92727C193F44BB00CF84401F568045CF0D9385
MD5 SHA1 SHA512 TLSH

Submit Download

oh434.exe

Path C:\Users\Admin\AppData\Roaming\oh434.exe
Size 45KB
SHA256 4c7e205cf6d27ae46e52d47651c292591b4e4f619e63c90583427bbc5d1b5543
MD5 1aabd3c5732ff17ff8a7877c81c3e136
SHA1 3159976b60986be577f65550c41aeefc8d746426
SHA512 a61328f16c3e786761fade8104bd602170ce2725702a72c59d55d5b647ed151dd4a27e34023a48fff2a8ca52cc725a72d7a24d997ef9c865fd46524156168d04
SSDEEP 768:BuPi1TVF5l6NWUtb2Hmo2qI43FoDEaOPIczjbigX3iGc8nH+FdQWYJBDZjx:BuPi1TV/l12e6Ea3c3bFXSS4dQWodjx
TLSH
T195231B003BE8822BF2BE5F7899F26145457AF6A32603D5492CC441DB5713BC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3208-0-0x00000000000C0000-0x00000000000D2000-memory.dmp

Download

memory/3208-1-0x0000000004BE0000-0x0000000004BF0000-memory.dmp

Download

memory/3208-2-0x0000000004BF0000-0x0000000004C8C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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