asyncrat | 97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1

General

Target
97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
Size 45KB
Sample260804-mt2vvshg65
SHA256 97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1
MD5 cefc80e240253beccac773a2f9d2d620
SHA1 5767bc7b6caf21d73e51be1c7f73c488bc0aa901
SHA512 1cb56ad095164d09b65258a8343ac7e33001a52069713b5c4ce3563fec7d2bc12f1af5e43d95bdc6a6ed3ed40cc6a4a5b5fac742bb74ef1bd2222e436e0e4449
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9MCOtTMtPIEzjbugX3iDZvGOMt8KBXgHBDZ8x:0u1YJTHcw2TRvE3bRXSDtpEMd8x
TLSH
T132233B0037E8812BF2BE5F789CF26145867AF6633603D58E1CC4519B5623FC69A42AFD
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

phimdugai.blog:80
phimdugai.blog:22
phimdugai.blog:8080
phimdugai.blog:8880
phimdugai.blog:2052
phimdugai.blog:2082
phimdugai.blog:2086
phimdugai.blog:2095
phimdugai.blog:443
phimdugai.blog:2053
phimdugai.blog:2083
phimdugai.blog:2087
phimdugai.blog:2096
phimdugai.blog:8443
www.phimdugai.blog:80
www.phimdugai.blog:22
www.phimdugai.blog:8080
www.phimdugai.blog:8880
www.phimdugai.blog:2052
www.phimdugai.blog:2082
www.phimdugai.blog:2086
www.phimdugai.blog:2095
www.phimdugai.blog:443
www.phimdugai.blog:2053
www.phimdugai.blog:2083
www.phimdugai.blog:2087
www.phimdugai.blog:2096
www.phimdugai.blog:8443
sodinokibi.phimdugai.blog:80
sodinokibi.phimdugai.blog:22
sodinokibi.phimdugai.blog:8080
sodinokibi.phimdugai.blog:8880
sodinokibi.phimdugai.blog:2052
sodinokibi.phimdugai.blog:2082
sodinokibi.phimdugai.blog:2086
sodinokibi.phimdugai.blog:2095
sodinokibi.phimdugai.blog:443
sodinokibi.phimdugai.blog:2053
sodinokibi.phimdugai.blog:2083
sodinokibi.phimdugai.blog:2087
sodinokibi.phimdugai.blog:2096
sodinokibi.phimdugai.blog:8443
malware.phimdugai.blog:80
malware.phimdugai.blog:22
malware.phimdugai.blog:8080
malware.phimdugai.blog:8880
malware.phimdugai.blog:2052
malware.phimdugai.blog:2082
malware.phimdugai.blog:2086
malware.phimdugai.blog:2095
malware.phimdugai.blog:443
malware.phimdugai.blog:2053
malware.phimdugai.blog:2083
malware.phimdugai.blog:2087
malware.phimdugai.blog:2096
malware.phimdugai.blog:8443

Mutex

fCpEA8UxwrwS

Attributes

delay
0
install
true
install_file
jvxzk5.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
behavioral1/files/0x000600000001e6bc-8.dat	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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe

Executes dropped EXE 2 IoCs

pid	Process
3460	jvxzk5.exe
3928	jvxzk5.exe

Outbound SSH connection to public host 2 TTPs 4 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	6	172.67.187.216:22	3460	jvxzk5.exe
SSH destination	14	104.21.56.197:22	3460	jvxzk5.exe
SSH destination	37	172.67.187.216:22	3460	jvxzk5.exe
SSH destination	43	104.21.56.197:22	3460	jvxzk5.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
3696	cmd.exe
4536	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	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jvxzk5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jvxzk5.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4240	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
4948	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
Token: SeDebugPrivilege	3460	jvxzk5.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 4536	2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe	85
PID 2932 wrote to memory of 3696	2932	97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe	87
PID 3696 wrote to memory of 4240	3696	cmd.exe	89
PID 4536 wrote to memory of 4948	4536	cmd.exe	90
PID 3696 wrote to memory of 3928	3696	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe
"C:\Users\Admin\AppData\Local\Temp\97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "jvxzk5" /tr '"C:\Users\Admin\AppData\Roaming\jvxzk5.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4536
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "jvxzk5" /tr '"C:\Users\Admin\AppData\Roaming\jvxzk5.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4948
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9DE.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3696
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4240
- - C:\Users\Admin\AppData\Roaming\jvxzk5.exe
    "C:\Users\Admin\AppData\Roaming\jvxzk5.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3928

C:\Users\Admin\AppData\Roaming\jvxzk5.exe
"C:\Users\Admin\AppData\Roaming\jvxzk5.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3460

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

tmp9DE.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp9DE.tmp.bat
Size 149B
SHA256 bd852c8d533af0e2a0003ee6d7d52563d34bae16ca6e90caa62f5e83e59eb7b3
MD5 a2aa584c497c4b523a5cb72050514e98
SHA1 bf9b852efbf4d678a510ab8e1ce94759315cd749
SHA512 6274f6059fd0a29b9b51516baad41f5b21973a6be3f61cb0b5bf4fc96529585447f64ae8e19d597863788f77b44f917012cc5bc66ccf7bf2bc726fce9d8d0674
TLSH
T130C02B5691C5EA4F3816241307FAD89D92B2AC193F40BB00C304800D2380448F4D9341
MD5 SHA1 SHA512 TLSH

Submit Download

jvxzk5.exe

Path C:\Users\Admin\AppData\Roaming\jvxzk5.exe
Size 45KB
SHA256 97c849f869d5617df0dbbd18ba7e05568254991081081c5e0ee11d7944bdcff1
MD5 cefc80e240253beccac773a2f9d2d620
SHA1 5767bc7b6caf21d73e51be1c7f73c488bc0aa901
SHA512 1cb56ad095164d09b65258a8343ac7e33001a52069713b5c4ce3563fec7d2bc12f1af5e43d95bdc6a6ed3ed40cc6a4a5b5fac742bb74ef1bd2222e436e0e4449
SSDEEP 768:0u1YJTHwAUgQWUaT2Wmo2q9MCOtTMtPIEzjbugX3iDZvGOMt8KBXgHBDZ8x:0u1YJTHcw2TRvE3bRXSDtpEMd8x
TLSH
T132233B0037E8812BF2BE5F789CF26145867AF6633603D58E1CC4519B5623FC69A42AFD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2932-0-0x0000000000190000-0x00000000001A2000-memory.dmp

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memory/2932-1-0x0000000004A80000-0x0000000004A90000-memory.dmp

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memory/2932-2-0x0000000004B50000-0x0000000004BEC000-memory.dmp

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memory/3460-10-0x0000000004F00000-0x0000000004F10000-memory.dmp

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memory/3460-13-0x0000000004F00000-0x0000000004F10000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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