asyncrat | e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f

General

Target
e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
Size 45KB
Sample260907-phjw1swfpg
SHA256 e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f
MD5 ba0bde71aa42f4022766fcd9cce8a759
SHA1 1290c3ff62f52938e8311d785e20930ef51fdacc
SHA512 e6186a870b17be5fdc5af74df1b62c6d07a292d3ae6a5c7f0a3939bfb89eb1d9b2813c0f8e55f283fa103be45b4184bc8e65e0e5d7c4234dcce7d333e6ed9de9
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1ZxJaxMwHuPIvzjb1g03i4Sw/HPEkA4BDZcx:RuxkJTgip2weN3v3bS0S4SwHHHdcx
TLSH
T18F232A0037E9812BF2BE4FB8A8F26105467AF2676603D94D2CC451DB5723FC6DA426ED
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

vnsextop1.com:80
vnsextop1.com:22
vnsextop1.com:8080
vnsextop1.com:8880
vnsextop1.com:2052
vnsextop1.com:2082
vnsextop1.com:2086
vnsextop1.com:2095
vnsextop1.com:443
vnsextop1.com:2053
vnsextop1.com:2083
vnsextop1.com:2087
vnsextop1.com:2096
vnsextop1.com:8443
www.vnsextop1.com:80
www.vnsextop1.com:22
www.vnsextop1.com:8080
www.vnsextop1.com:8880
www.vnsextop1.com:2052
www.vnsextop1.com:2082
www.vnsextop1.com:2086
www.vnsextop1.com:2095
www.vnsextop1.com:443
www.vnsextop1.com:2053
www.vnsextop1.com:2083
www.vnsextop1.com:2087
www.vnsextop1.com:2096
www.vnsextop1.com:8443
gozi.vnsextop1.com:80
gozi.vnsextop1.com:22
gozi.vnsextop1.com:8080
gozi.vnsextop1.com:8880
gozi.vnsextop1.com:2052
gozi.vnsextop1.com:2082
gozi.vnsextop1.com:2086
gozi.vnsextop1.com:2095
gozi.vnsextop1.com:443
gozi.vnsextop1.com:2053
gozi.vnsextop1.com:2083
gozi.vnsextop1.com:2087
gozi.vnsextop1.com:2096
gozi.vnsextop1.com:8443
blacklotus.vnsextop1.com:80
blacklotus.vnsextop1.com:22
blacklotus.vnsextop1.com:8080
blacklotus.vnsextop1.com:8880
blacklotus.vnsextop1.com:2052
blacklotus.vnsextop1.com:2082
blacklotus.vnsextop1.com:2086
blacklotus.vnsextop1.com:2095
blacklotus.vnsextop1.com:443
blacklotus.vnsextop1.com:2053
blacklotus.vnsextop1.com:2083
blacklotus.vnsextop1.com:2087
blacklotus.vnsextop1.com:2096
blacklotus.vnsextop1.com:8443

Mutex

TLHZlXFL9sme

Attributes

delay
0
install
true
install_file
dv78hcqj.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/0x0009000000024695-8.dat	family_asyncrat
behavioral1/memory/5676-10-0x0000000004FD0000-0x0000000004FE0000-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-1-5-21-3053180483-1881419501-3594244048-1000\Control Panel\International\Geo\Nation	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe

Executes dropped EXE 2 IoCs

pid	Process
5676	dv78hcqj.exe
2836	dv78hcqj.exe

Outbound SSH connection to public host 2 TTPs 4 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	14	104.18.30.167:22	5676	dv78hcqj.exe
SSH destination	29	104.18.31.167:22	5676	dv78hcqj.exe
SSH destination	53	104.18.31.167:22	5676	dv78hcqj.exe
SSH destination	61	104.18.30.167:22	5676	dv78hcqj.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
1776	cmd.exe
5964	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dv78hcqj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dv78hcqj.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5884	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
1640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
Token: SeDebugPrivilege	5676	dv78hcqj.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 1776	4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe	86
PID 4616 wrote to memory of 5964	4616	e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe	88
PID 5964 wrote to memory of 5884	5964	cmd.exe	90
PID 1776 wrote to memory of 1640	1776	cmd.exe	91
PID 5964 wrote to memory of 2836	5964	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe
"C:\Users\Admin\AppData\Local\Temp\e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4616
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dv78hcqj" /tr '"C:\Users\Admin\AppData\Roaming\dv78hcqj.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1776
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dv78hcqj" /tr '"C:\Users\Admin\AppData\Roaming\dv78hcqj.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1640
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5BC7.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5964
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5884
- - C:\Users\Admin\AppData\Roaming\dv78hcqj.exe
    "C:\Users\Admin\AppData\Roaming\dv78hcqj.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2836

C:\Users\Admin\AppData\Roaming\dv78hcqj.exe
"C:\Users\Admin\AppData\Roaming\dv78hcqj.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5676

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

tmp5BC7.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5BC7.tmp.bat
Size 152B
SHA256 c7f7e972f5a9c1b4d5740cae49cf5326cdb77aa5105ebea87b3677cfdd9ad990
MD5 2edb23debee0c3b6b17e198c0491df71
SHA1 f74d71b0653d70e85adf6d24a77af04fd9d383f8
SHA512 85ab7acc92b5104cb3afefeb1da7bf5cf57fafdb8d795272bcab99c50fd8143e8cefb383cd5bfb77824379b774d807008d4606d7f06d276de60fa1b7e612235b
TLSH
T105C02B5251C9EA1E2849541302FAD98F92B36C2ABF81FB00E704840E1380449F4D9345
MD5 SHA1 SHA512 TLSH

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dv78hcqj.exe

Path C:\Users\Admin\AppData\Roaming\dv78hcqj.exe
Size 45KB
SHA256 e4f84b8c09e16c4d360f8b27c062efe2f6a371dc69e1e5c4882d4ddb366b1d5f
MD5 ba0bde71aa42f4022766fcd9cce8a759
SHA1 1290c3ff62f52938e8311d785e20930ef51fdacc
SHA512 e6186a870b17be5fdc5af74df1b62c6d07a292d3ae6a5c7f0a3939bfb89eb1d9b2813c0f8e55f283fa103be45b4184bc8e65e0e5d7c4234dcce7d333e6ed9de9
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q1ZxJaxMwHuPIvzjb1g03i4Sw/HPEkA4BDZcx:RuxkJTgip2weN3v3bS0S4SwHHHdcx
TLSH
T18F232A0037E9812BF2BE4FB8A8F26105467AF2676603D94D2CC451DB5723FC6DA426ED
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4616-0-0x00000000007F0000-0x0000000000802000-memory.dmp

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memory/4616-1-0x00000000052E0000-0x00000000052F0000-memory.dmp

Download

memory/4616-2-0x00000000051B0000-0x000000000524C000-memory.dmp

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memory/5676-10-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

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memory/5676-13-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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