asyncrat | 657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c

General

Target
657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
Size 45KB
Sample260801-xewemsfb86
SHA256 657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c
MD5 d04f8bd6cd9c965e9bbf8109097cf1ea
SHA1 a65fc651e8cd53769c7383f16db42420e88db072
SHA512 77b3be644828eebda00dfec6ddba80bd2dd859a7b2ff58f24999b59e53727820ff5d39dcfdd5bb33efe3540cbf134e4d7f414794cef0231bf4b9ec3eb2e01f25
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1FxGZGP9HuPI4zjbIgN3ikVOXwNd8+mD+Uid+BDg:cu6YepTPso2kGa343bfNSkSYdrpdQdUx
TLSH
T174232B003BE9812BF2BE5F7898F26145867AF6637603D64D1CC442DB5623FC68A426FD
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
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
notpetya.phimdugai.blog:80
notpetya.phimdugai.blog:22
notpetya.phimdugai.blog:8080
notpetya.phimdugai.blog:8880
notpetya.phimdugai.blog:2052
notpetya.phimdugai.blog:2082
notpetya.phimdugai.blog:2086
notpetya.phimdugai.blog:2095
notpetya.phimdugai.blog:443
notpetya.phimdugai.blog:2053
notpetya.phimdugai.blog:2083
notpetya.phimdugai.blog:2087
notpetya.phimdugai.blog:2096
notpetya.phimdugai.blog:8443
locky.phimdugai.blog:80
locky.phimdugai.blog:22
locky.phimdugai.blog:8080
locky.phimdugai.blog:8880
locky.phimdugai.blog:2052
locky.phimdugai.blog:2082
locky.phimdugai.blog:2086
locky.phimdugai.blog:2095
locky.phimdugai.blog:443
locky.phimdugai.blog:2053
locky.phimdugai.blog:2083
locky.phimdugai.blog:2087
locky.phimdugai.blog:2096
locky.phimdugai.blog:8443

Mutex

teQFKzbxf6uX

Attributes

delay
0
install
true
install_file
kug1osqm.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/0x0005000000023208-8.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-1-5-21-1074038928-2032447174-945360078-1000\Control Panel\International\Geo\Nation	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe

Executes dropped EXE 2 IoCs

pid	Process
2868	kug1osqm.exe
3076	kug1osqm.exe

Outbound SSH connection to public host 2 TTPs 2 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	90	104.21.56.197:22	2868	kug1osqm.exe
SSH destination	101	172.67.187.216:22	2868	kug1osqm.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
2176	cmd.exe
4568	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	kug1osqm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kug1osqm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2224	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
4892	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
Token: SeDebugPrivilege	2868	kug1osqm.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2176	2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe	85
PID 2220 wrote to memory of 4568	2220	657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe	87
PID 4568 wrote to memory of 2224	4568	cmd.exe	89
PID 2176 wrote to memory of 4892	2176	cmd.exe	90
PID 4568 wrote to memory of 3076	4568	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe
"C:\Users\Admin\AppData\Local\Temp\657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "kug1osqm" /tr '"C:\Users\Admin\AppData\Roaming\kug1osqm.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2176
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "kug1osqm" /tr '"C:\Users\Admin\AppData\Roaming\kug1osqm.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4892
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9B22.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4568
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2224
- - C:\Users\Admin\AppData\Roaming\kug1osqm.exe
    "C:\Users\Admin\AppData\Roaming\kug1osqm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3076

C:\Users\Admin\AppData\Roaming\kug1osqm.exe
"C:\Users\Admin\AppData\Roaming\kug1osqm.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2868

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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tmp9B22.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp9B22.tmp.bat
Size 152B
SHA256 50b61165bd689470eabf47023f8c0749e4baf41fe235212a1f5a7571ded61729
MD5 55ff8263f3ef74a7f96e97b9cdc876eb
SHA1 9b0bf2a9e7b53d957abb2ea4d0cc9c6f96632f53
SHA512 3145d65d8047e9d8399d485983a483344cec10e6d3c93686a692435c813c9c86ddfff39ef422d14cfbca601f6e670da6218dda883d105e8bec3737a9862c7340
TLSH
T1F5C02B8251C5EA0E3C4D945307FAE48EE1BA6C5D3F44FB80D304484D5284488F0D9342
MD5 SHA1 SHA512 TLSH

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kug1osqm.exe

Path C:\Users\Admin\AppData\Roaming\kug1osqm.exe
Size 45KB
SHA256 657d9c23bffe4170436d60d98bbb215ea6b0224dd345dbed4fe6f9ad5820e55c
MD5 d04f8bd6cd9c965e9bbf8109097cf1ea
SHA1 a65fc651e8cd53769c7383f16db42420e88db072
SHA512 77b3be644828eebda00dfec6ddba80bd2dd859a7b2ff58f24999b59e53727820ff5d39dcfdd5bb33efe3540cbf134e4d7f414794cef0231bf4b9ec3eb2e01f25
SSDEEP 768:cu6RaepTPYzbs8WU+Xaamo2q1FxGZGP9HuPI4zjbIgN3ikVOXwNd8+mD+Uid+BDg:cu6YepTPso2kGa343bfNSkSYdrpdQdUx
TLSH
T174232B003BE9812BF2BE5F7898F26145867AF6637603D64D1CC442DB5623FC68A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2220-0-0x0000000000680000-0x0000000000692000-memory.dmp

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memory/2220-1-0x00000000051D0000-0x00000000051E0000-memory.dmp

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memory/2220-2-0x0000000005080000-0x000000000511C000-memory.dmp

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memory/2868-10-0x0000000004B30000-0x0000000004B40000-memory.dmp

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memory/2868-13-0x0000000004B30000-0x0000000004B40000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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