asyncrat | ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c

General

Target
ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
Size 45KB
Sample260831-th8ycsvhmd
SHA256 ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c
MD5 d4119e6668fcf8737dfed37524d87f8c
SHA1 633170d58ef6233db35f298a876b4c3238f02d4f
SHA512 4c5026dc03b3bb354cb9dda9fe2fa7f700e909d9377e0d5046369d7d35006b7a9a836da01980768a9ef9b1450545c21ac40c370bb02ad9eb21748f355b36fd38
SSDEEP 768:5udApTNctooWUS7C+mo2qtSCSwTMSPI5XPjbsFgX3icr/cVQPrBDZ0x:5udApTNmU2lgG5rblXSsxd0x
TLSH
T117232B0037E8C12BF2BE5F78ACF26145867AF6673602D54E2CC441DB5613BC69A426FE
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
blacklotus.phimheo3x.net:80
blacklotus.phimheo3x.net:22
blacklotus.phimheo3x.net:8080
blacklotus.phimheo3x.net:8880
blacklotus.phimheo3x.net:2052
blacklotus.phimheo3x.net:2082
blacklotus.phimheo3x.net:2086
blacklotus.phimheo3x.net:2095
blacklotus.phimheo3x.net:443
blacklotus.phimheo3x.net:2053
blacklotus.phimheo3x.net:2083
blacklotus.phimheo3x.net:2087
blacklotus.phimheo3x.net:2096
blacklotus.phimheo3x.net:8443
stuxnet.phimheo3x.net:80
stuxnet.phimheo3x.net:22
stuxnet.phimheo3x.net:8080
stuxnet.phimheo3x.net:8880
stuxnet.phimheo3x.net:2052
stuxnet.phimheo3x.net:2082
stuxnet.phimheo3x.net:2086
stuxnet.phimheo3x.net:2095
stuxnet.phimheo3x.net:443
stuxnet.phimheo3x.net:2053
stuxnet.phimheo3x.net:2083
stuxnet.phimheo3x.net:2087
stuxnet.phimheo3x.net:2096
stuxnet.phimheo3x.net:8443

Mutex

v6L1ZJJqA6EJ

Attributes

delay
0
install
true
install_file
vy2029.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 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x000f000000024384-8.dat	family_asyncrat
behavioral1/memory/1180-10-0x00000000050E0000-0x00000000050F0000-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-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe

Executes dropped EXE 2 IoCs

pid	Process
1180	vy2029.exe
540	vy2029.exe

Outbound SSH connection to public host 2 TTPs 3 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	19	103.109.100.136:22	1180	vy2029.exe
SSH destination	58	103.109.100.136:22	1180	vy2029.exe
SSH destination	64	103.109.100.136:22	1180	vy2029.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
4344	cmd.exe
3236	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	vy2029.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vy2029.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.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
4652	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
4412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
Token: SeDebugPrivilege	1180	vy2029.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4500 wrote to memory of 4344	4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe	88
PID 4500 wrote to memory of 3236	4500	ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe	90
PID 3236 wrote to memory of 4652	3236	cmd.exe	92
PID 4344 wrote to memory of 4412	4344	cmd.exe	93
PID 3236 wrote to memory of 540	3236	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe
"C:\Users\Admin\AppData\Local\Temp\ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "vy2029" /tr '"C:\Users\Admin\AppData\Roaming\vy2029.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4344
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "vy2029" /tr '"C:\Users\Admin\AppData\Roaming\vy2029.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4412
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3A64.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3236
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4652
- - C:\Users\Admin\AppData\Roaming\vy2029.exe
    "C:\Users\Admin\AppData\Roaming\vy2029.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:540

C:\Users\Admin\AppData\Roaming\vy2029.exe
"C:\Users\Admin\AppData\Roaming\vy2029.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1180

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

tmp3A64.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3A64.tmp.bat
Size 150B
SHA256 cc2bf2dd687958d0d224753a76c5ac7d93cdb79cd50322289b873481ef79efe7
MD5 d0e17ca23d3c95b24722a579d5fb5d79
SHA1 4c14443e2515f9a5f83c1eb483dab31dab733fb5
SHA512 6f4048a1ee9b6c98690443f71ebf2738b3ff5e21382120a38546e64d520d957966b3c2b45fddb5a71a61634a7d6353ee8021ae332523ef09c94e05a49f49a1fd
TLSH
T1D3C08C4662C5AE9E3805146312BBD4ACA1A268293E41AB109744844A2281849E09A246
MD5 SHA1 SHA512 TLSH

Submit Download

vy2029.exe

Path C:\Users\Admin\AppData\Roaming\vy2029.exe
Size 45KB
SHA256 ec34d61a3fac4a07790e0c1c3f6b882ec1964aa8acf52adf95797b31fab65b3c
MD5 d4119e6668fcf8737dfed37524d87f8c
SHA1 633170d58ef6233db35f298a876b4c3238f02d4f
SHA512 4c5026dc03b3bb354cb9dda9fe2fa7f700e909d9377e0d5046369d7d35006b7a9a836da01980768a9ef9b1450545c21ac40c370bb02ad9eb21748f355b36fd38
SSDEEP 768:5udApTNctooWUS7C+mo2qtSCSwTMSPI5XPjbsFgX3icr/cVQPrBDZ0x:5udApTNmU2lgG5rblXSsxd0x
TLSH
T117232B0037E8C12BF2BE5F78ACF26145867AF6673602D54E2CC441DB5613BC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1180-10-0x00000000050E0000-0x00000000050F0000-memory.dmp

Download

memory/1180-13-0x00000000050E0000-0x00000000050F0000-memory.dmp

Download

memory/4500-0-0x0000000000F70000-0x0000000000F82000-memory.dmp

Download

memory/4500-1-0x00000000059C0000-0x00000000059D0000-memory.dmp

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memory/4500-2-0x00000000059D0000-0x0000000005A6C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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