asyncrat | 047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b

General

Target
047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
Size 45KB
Sample260907-shnrrayhra
SHA256 047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b
MD5 15adf444d2e7fc7a8fd841a17cab8cfe
SHA1 1279a3e2005cb04ff4f1e0902fb95d796ff3dcec
SHA512 5d447efa9513bdd98c5c03b681dbcafaa8b4aa746059d927e7eeac352be510910f6c175888934e33f0446fe835ba898503c08855fd09867d6353093e702f50e7
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q13maPol53APIkzjbtgX3i1BcYx1gQsQcLZKetc2BDY:RuxkJTgip22fob3lk3b6XS1BTjg7Qc/a
TLSH
T1FA232B003BE9813BF2BF4F7899F26145467AF2637603D64A1CC4529B4623FC69A426FD
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

phimheovn.com:80
phimheovn.com:22
phimheovn.com:8080
phimheovn.com:8880
phimheovn.com:2052
phimheovn.com:2082
phimheovn.com:2086
phimheovn.com:2095
phimheovn.com:443
phimheovn.com:2053
phimheovn.com:2083
phimheovn.com:2087
phimheovn.com:2096
phimheovn.com:8443
www.phimheovn.com:80
www.phimheovn.com:22
www.phimheovn.com:8080
www.phimheovn.com:8880
www.phimheovn.com:2052
www.phimheovn.com:2082
www.phimheovn.com:2086
www.phimheovn.com:2095
www.phimheovn.com:443
www.phimheovn.com:2053
www.phimheovn.com:2083
www.phimheovn.com:2087
www.phimheovn.com:2096
www.phimheovn.com:8443
revil.phimheovn.com:80
revil.phimheovn.com:22
revil.phimheovn.com:8080
revil.phimheovn.com:8880
revil.phimheovn.com:2052
revil.phimheovn.com:2082
revil.phimheovn.com:2086
revil.phimheovn.com:2095
revil.phimheovn.com:443
revil.phimheovn.com:2053
revil.phimheovn.com:2083
revil.phimheovn.com:2087
revil.phimheovn.com:2096
revil.phimheovn.com:8443
gozi.phimheovn.com:80
gozi.phimheovn.com:22
gozi.phimheovn.com:8080
gozi.phimheovn.com:8880
gozi.phimheovn.com:2052
gozi.phimheovn.com:2082
gozi.phimheovn.com:2086
gozi.phimheovn.com:2095
gozi.phimheovn.com:443
gozi.phimheovn.com:2053
gozi.phimheovn.com:2083
gozi.phimheovn.com:2087
gozi.phimheovn.com:2096
gozi.phimheovn.com:8443

Mutex

819guPMuQXJ3

Attributes

delay
0
install
true
install_file
u7q2g0ox.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 3 IoCs

rat

resource	yara_rule
behavioral1/files/0x000900000002449a-8.dat	family_asyncrat
behavioral1/memory/3240-10-0x0000000005220000-0x0000000005230000-memory.dmp	family_asyncrat
behavioral1/memory/3240-13-0x0000000005220000-0x0000000005230000-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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe

Executes dropped EXE 2 IoCs

pid	Process
3240	u7q2g0ox.exe
2024	u7q2g0ox.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	20	103.109.100.136:22	3240	u7q2g0ox.exe
SSH destination	70	103.109.100.136:22	3240	u7q2g0ox.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
1844	cmd.exe
1364	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	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.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	u7q2g0ox.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	u7q2g0ox.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2280	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
4460	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
Token: SeDebugPrivilege	3240	u7q2g0ox.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4040 wrote to memory of 1844	4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe	85
PID 4040 wrote to memory of 1364	4040	047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe	87
PID 1364 wrote to memory of 2280	1364	cmd.exe	89
PID 1844 wrote to memory of 4460	1844	cmd.exe	90
PID 1364 wrote to memory of 2024	1364	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe
"C:\Users\Admin\AppData\Local\Temp\047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4040
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "u7q2g0ox" /tr '"C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1844
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "u7q2g0ox" /tr '"C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4460
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp48CC.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1364
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2280
- - C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe
    "C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2024

C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe
"C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3240

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

tmp48CC.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp48CC.tmp.bat
Size 152B
SHA256 25d4078d5ff66fb8f36632c9c3e7b866b08ae95ea86ce2350d0555989e21c912
MD5 6f571186547065dfca4330324655c1ee
SHA1 77c5d91aba15e449a4fcf93f9ab66bcdb5a696e8
SHA512 dbdfe5f014d92c2f6ba6473f09ccdbe8ac0d2880ec77cdcd2d7dc05b06a1cca7a1cd337f092bf1dcd13c89386019121568108dc604c5cdff9fed6b0809302d60
TLSH
T1DCC02B4252C5FE0F2805281306FBF88CA1F26C193F46BB10C308884D128044EF0D9381
MD5 SHA1 SHA512 TLSH

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u7q2g0ox.exe

Path C:\Users\Admin\AppData\Roaming\u7q2g0ox.exe
Size 45KB
SHA256 047061c7e1ec35abbe099457542770d2bcef247ba7ebc7d881ecfb3b47b3496b
MD5 15adf444d2e7fc7a8fd841a17cab8cfe
SHA1 1279a3e2005cb04ff4f1e0902fb95d796ff3dcec
SHA512 5d447efa9513bdd98c5c03b681dbcafaa8b4aa746059d927e7eeac352be510910f6c175888934e33f0446fe835ba898503c08855fd09867d6353093e702f50e7
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q13maPol53APIkzjbtgX3i1BcYx1gQsQcLZKetc2BDY:RuxkJTgip22fob3lk3b6XS1BTjg7Qc/a
TLSH
T1FA232B003BE9813BF2BF4F7899F26145467AF2637603D64A1CC4529B4623FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3240-10-0x0000000005220000-0x0000000005230000-memory.dmp

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memory/3240-13-0x0000000005220000-0x0000000005230000-memory.dmp

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memory/4040-0-0x00000000006F0000-0x0000000000702000-memory.dmp

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memory/4040-1-0x00000000051F0000-0x0000000005200000-memory.dmp

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memory/4040-2-0x00000000050B0000-0x000000000514C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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