asyncrat | eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077

General

Target
eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
Size 45KB
Sample260802-g5a9dsec73
SHA256 eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077
MD5 ea1d4530bc22d44388cd0efc1906557f
SHA1 5f80c79c3784f96a126b973d746d80a5bcf18ef8
SHA512 bc708f9603f054d071c76574cfb20a2bb1eedb1da6563f2482c86c63ec65659bb544f90df9884b2e6e79fd0f7c8db5b5c4ea51286fa0718d1db48c2610782dfb
SSDEEP 768:wuZ8pT1Uu4/cWUeT66mo2q1/8kLyuObvtkjZPICzjb9gXeib/eOAULUMnBDZMx:wuZ8pT1tc2W8LuyyjWC3bqXnboULUodO
TLSH
T1C1232B003BE9812BF2BE4F7898F26145867AF6637603D58A1CC441DB5623FC6DA426FD
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
invasive.phimdugai.blog:80
invasive.phimdugai.blog:22
invasive.phimdugai.blog:8080
invasive.phimdugai.blog:8880
invasive.phimdugai.blog:2052
invasive.phimdugai.blog:2082
invasive.phimdugai.blog:2086
invasive.phimdugai.blog:2095
invasive.phimdugai.blog:443
invasive.phimdugai.blog:2053
invasive.phimdugai.blog:2083
invasive.phimdugai.blog:2087
invasive.phimdugai.blog:2096
invasive.phimdugai.blog:8443
trisis.phimdugai.blog:80
trisis.phimdugai.blog:22
trisis.phimdugai.blog:8080
trisis.phimdugai.blog:8880
trisis.phimdugai.blog:2052
trisis.phimdugai.blog:2082
trisis.phimdugai.blog:2086
trisis.phimdugai.blog:2095
trisis.phimdugai.blog:443
trisis.phimdugai.blog:2053
trisis.phimdugai.blog:2083
trisis.phimdugai.blog:2087
trisis.phimdugai.blog:2096
trisis.phimdugai.blog:8443

Mutex

nTxfSHP78JqD

Attributes

delay
0
install
true
install_file
162r.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/0x00090000000245c6-8.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	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe

Executes dropped EXE 2 IoCs

pid	Process
2936	162r.exe
4724	162r.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	64	172.67.187.216:22	2936	162r.exe
SSH destination	65	104.21.56.197:22	2936	162r.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
4904	cmd.exe
1148	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	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.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	162r.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	162r.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3988	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
4000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
Token: SeDebugPrivilege	2936	162r.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4336 wrote to memory of 4904	4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe	85
PID 4336 wrote to memory of 1148	4336	eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe	87
PID 1148 wrote to memory of 3988	1148	cmd.exe	89
PID 4904 wrote to memory of 4000	4904	cmd.exe	90
PID 1148 wrote to memory of 4724	1148	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe
"C:\Users\Admin\AppData\Local\Temp\eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4336
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "162r" /tr '"C:\Users\Admin\AppData\Roaming\162r.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4904
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "162r" /tr '"C:\Users\Admin\AppData\Roaming\162r.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4000
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1921.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1148
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3988
- - C:\Users\Admin\AppData\Roaming\162r.exe
    "C:\Users\Admin\AppData\Roaming\162r.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4724

C:\Users\Admin\AppData\Roaming\162r.exe
"C:\Users\Admin\AppData\Roaming\162r.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2936

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

tmp1921.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1921.tmp.bat
Size 148B
SHA256 e67bb027ce382fd1335a4c5c556d91906e2f6f711692aa9dfdf0ee4bbded9f56
MD5 237eefaaa30946afa2f02e17d749ef6e
SHA1 ce9b97b7a94f834dae85580dd6c37020df5329a7
SHA512 d15268e611458d541dcb305c46ec656aed4f30977a77b4624483cfcacd34976600673af1382a64aa6a5c56300ff35fab3f0de2cc9aead431b46a10f32112782f
TLSH
T1FFC02B4255C5FA0E680A146312FFD4CCA1726C193F44FB10C704408D2380848F0DD742
MD5 SHA1 SHA512 TLSH

Submit Download

162r.exe

Path C:\Users\Admin\AppData\Roaming\162r.exe
Size 45KB
SHA256 eaceb0c2cec749448724819410e7c1c0fac2af9c4e94db05fadc61363eea6077
MD5 ea1d4530bc22d44388cd0efc1906557f
SHA1 5f80c79c3784f96a126b973d746d80a5bcf18ef8
SHA512 bc708f9603f054d071c76574cfb20a2bb1eedb1da6563f2482c86c63ec65659bb544f90df9884b2e6e79fd0f7c8db5b5c4ea51286fa0718d1db48c2610782dfb
SSDEEP 768:wuZ8pT1Uu4/cWUeT66mo2q1/8kLyuObvtkjZPICzjb9gXeib/eOAULUMnBDZMx:wuZ8pT1tc2W8LuyyjWC3bqXnboULUodO
TLSH
T1C1232B003BE9812BF2BE4F7898F26145867AF6637603D58A1CC441DB5623FC6DA426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/2936-10-0x0000000004B80000-0x0000000004B90000-memory.dmp

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memory/2936-13-0x0000000004B80000-0x0000000004B90000-memory.dmp

Download

memory/4336-0-0x0000000000F80000-0x0000000000F92000-memory.dmp

Download

memory/4336-1-0x0000000005980000-0x0000000005990000-memory.dmp

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memory/4336-2-0x0000000005990000-0x0000000005A2C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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