asyncrat | 328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9

General

Target
328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
Size 45KB
Sample260831-t478yswerd
SHA256 328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9
MD5 f403b081a3c6f2d487739af28f13a0cd
SHA1 f73e09642e620c41cc10e2bae9b4ccc1cfd80184
SHA512 e72788434da55d3ce86aa25a255cf4a5152aa3130e78e9c66fb0f7bf5235ec24cd2511da4aaffdc70daeb3b505dd29bb38c1395d464a78f4eddb2de0ac3a61d9
SSDEEP 768:5udApTNctooWUS7C+mo2qthRzMwnOPIZzjbsgX3iTYhi6zkCnI+J52JBDZ0x:5udApTNmU2qA+3Z3bjXS2nI4Yd0x
TLSH
T1B6231A003BE8822BF2BE5F78ACF26145467AF5673603D58E1CC4519B5613FC68A426FE
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

phimheo3x.net:80
phimheo3x.net:22
phimheo3x.net:8080
phimheo3x.net:8880
phimheo3x.net:2052
phimheo3x.net:2082
phimheo3x.net:2086
phimheo3x.net:2095
phimheo3x.net:443
phimheo3x.net:2053
phimheo3x.net:2083
phimheo3x.net:2087
phimheo3x.net:2096
phimheo3x.net:8443
www.phimheo3x.net:80
www.phimheo3x.net:22
www.phimheo3x.net:8080
www.phimheo3x.net:8880
www.phimheo3x.net:2052
www.phimheo3x.net:2082
www.phimheo3x.net:2086
www.phimheo3x.net:2095
www.phimheo3x.net:443
www.phimheo3x.net:2053
www.phimheo3x.net:2083
www.phimheo3x.net:2087
www.phimheo3x.net:2096
www.phimheo3x.net:8443
ursnif.phimheo3x.net:80
ursnif.phimheo3x.net:22
ursnif.phimheo3x.net:8080
ursnif.phimheo3x.net:8880
ursnif.phimheo3x.net:2052
ursnif.phimheo3x.net:2082
ursnif.phimheo3x.net:2086
ursnif.phimheo3x.net:2095
ursnif.phimheo3x.net:443
ursnif.phimheo3x.net:2053
ursnif.phimheo3x.net:2083
ursnif.phimheo3x.net:2087
ursnif.phimheo3x.net:2096
ursnif.phimheo3x.net:8443
sobig.phimheo3x.net:80
sobig.phimheo3x.net:22
sobig.phimheo3x.net:8080
sobig.phimheo3x.net:8880
sobig.phimheo3x.net:2052
sobig.phimheo3x.net:2082
sobig.phimheo3x.net:2086
sobig.phimheo3x.net:2095
sobig.phimheo3x.net:443
sobig.phimheo3x.net:2053
sobig.phimheo3x.net:2083
sobig.phimheo3x.net:2087
sobig.phimheo3x.net:2096
sobig.phimheo3x.net:8443

Mutex

hNDUbu7C3pGN

Attributes

delay
0
install
true
install_file
bi1qof.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/0x000a000000024358-8.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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe

Executes dropped EXE 2 IoCs

pid	Process
3564	bi1qof.exe
4712	bi1qof.exe

Outbound SSH connection to public host 2 TTPs 1 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	16	103.109.100.136:22	3564	bi1qof.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
3492	cmd.exe
4220	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	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.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	bi1qof.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bi1qof.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3896	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
1216	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
Token: SeDebugPrivilege	3564	bi1qof.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3472 wrote to memory of 3492	3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe	85
PID 3472 wrote to memory of 4220	3472	328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe	87
PID 4220 wrote to memory of 3896	4220	cmd.exe	89
PID 3492 wrote to memory of 1216	3492	cmd.exe	90
PID 4220 wrote to memory of 4712	4220	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe
"C:\Users\Admin\AppData\Local\Temp\328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3472
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "bi1qof" /tr '"C:\Users\Admin\AppData\Roaming\bi1qof.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3492
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "bi1qof" /tr '"C:\Users\Admin\AppData\Roaming\bi1qof.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1216
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1316.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4220
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3896
- - C:\Users\Admin\AppData\Roaming\bi1qof.exe
    "C:\Users\Admin\AppData\Roaming\bi1qof.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4712

C:\Users\Admin\AppData\Roaming\bi1qof.exe
"C:\Users\Admin\AppData\Roaming\bi1qof.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3564

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

tmp1316.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1316.tmp.bat
Size 150B
SHA256 d4f4e772acf1931596c78afe8420f9c4230a25a6332c1308068a9775ed7fb28a
MD5 b023630047809394dd9644afe5c145cf
SHA1 3938eb9c09d086150ba993344e3c57ab631c58e1
SHA512 b8f2b63e5ea35f1c622a3626f76792dec9ed954c0edc41739c8e9e3576d36c56a4fd9a26865ab66cb934bd9eacee66e891b904197c3fac2e61691d58320fad45
TLSH
T1CFC02BD251C6FA0E7C0A146323FED49CB1736C693F40FB00C304404E528085CF0DA381
MD5 SHA1 SHA512 TLSH

Submit Download

bi1qof.exe

Path C:\Users\Admin\AppData\Roaming\bi1qof.exe
Size 45KB
SHA256 328c4fa8ac369149882aa357e088abb871af300be32c40e76c20944941b6cea9
MD5 f403b081a3c6f2d487739af28f13a0cd
SHA1 f73e09642e620c41cc10e2bae9b4ccc1cfd80184
SHA512 e72788434da55d3ce86aa25a255cf4a5152aa3130e78e9c66fb0f7bf5235ec24cd2511da4aaffdc70daeb3b505dd29bb38c1395d464a78f4eddb2de0ac3a61d9
SSDEEP 768:5udApTNctooWUS7C+mo2qthRzMwnOPIZzjbsgX3iTYhi6zkCnI+J52JBDZ0x:5udApTNmU2qA+3Z3bjXS2nI4Yd0x
TLSH
T1B6231A003BE8822BF2BE5F78ACF26145467AF5673603D58E1CC4519B5613FC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3472-0-0x00000000002C0000-0x00000000002D2000-memory.dmp

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memory/3472-1-0x0000000004CC0000-0x0000000004CD0000-memory.dmp

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memory/3472-2-0x0000000004B80000-0x0000000004C1C000-memory.dmp

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memory/3564-10-0x0000000004C50000-0x0000000004C60000-memory.dmp

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memory/3564-13-0x0000000004C50000-0x0000000004C60000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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