asyncrat | ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419

General

Target
ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
Size 45KB
Sample260804-as6ffazeph
SHA256 ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419
MD5 38b273067579f7a74527be386de0f029
SHA1 0c14bf6f10c3435fff2972885179dc9527297ed7
SHA512 866043eba041ccb1010f86f235dcbc9772aec11c9f1dbe83eb2eb4949e04586f2663f424f4108a7e86bfdde38665a3bb6d4dc5cb779e751f954f9581318a137c
SSDEEP 768:5udApTNctooWUS7C+mo2qt+CHyTtUPInzjbhgX3iOVC/yGpHAMKprBDZ0x:5udApTNmU2Jnjn3bOXSimped0x
TLSH
T1E7231B0037E8C22BF2BE4F78A8F26245867AF5773603D54A1CC451DB5623BC696426FE
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
azorult.vnsextop1.com:80
azorult.vnsextop1.com:22
azorult.vnsextop1.com:8080
azorult.vnsextop1.com:8880
azorult.vnsextop1.com:2052
azorult.vnsextop1.com:2082
azorult.vnsextop1.com:2086
azorult.vnsextop1.com:2095
azorult.vnsextop1.com:443
azorult.vnsextop1.com:2053
azorult.vnsextop1.com:2083
azorult.vnsextop1.com:2087
azorult.vnsextop1.com:2096
azorult.vnsextop1.com:8443
trickbot.vnsextop1.com:80
trickbot.vnsextop1.com:22
trickbot.vnsextop1.com:8080
trickbot.vnsextop1.com:8880
trickbot.vnsextop1.com:2052
trickbot.vnsextop1.com:2082
trickbot.vnsextop1.com:2086
trickbot.vnsextop1.com:2095
trickbot.vnsextop1.com:443
trickbot.vnsextop1.com:2053
trickbot.vnsextop1.com:2083
trickbot.vnsextop1.com:2087
trickbot.vnsextop1.com:2096
trickbot.vnsextop1.com:8443

Mutex

38r2552FkU1e

Attributes

delay
0
install
true
install_file
iw2003.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/0x000800000002460c-8.dat	family_asyncrat
behavioral1/memory/5404-10-0x0000000005050000-0x0000000005060000-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	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe

Executes dropped EXE 2 IoCs

pid	Process
5404	iw2003.exe
2188	iw2003.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	30	185.100.234.69:22	5404	iw2003.exe
SSH destination	33	185.100.234.69:22	5404	iw2003.exe
SSH destination	46	185.100.234.69:22	5404	iw2003.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
5928	cmd.exe
3076	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	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.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	iw2003.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iw2003.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1180	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
2748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
Token: SeDebugPrivilege	5404	iw2003.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 5928	3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe	87
PID 3172 wrote to memory of 3076	3172	ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe	89
PID 3076 wrote to memory of 1180	3076	cmd.exe	91
PID 5928 wrote to memory of 2748	5928	cmd.exe	92
PID 3076 wrote to memory of 2188	3076	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe
"C:\Users\Admin\AppData\Local\Temp\ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "iw2003" /tr '"C:\Users\Admin\AppData\Roaming\iw2003.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5928
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "iw2003" /tr '"C:\Users\Admin\AppData\Roaming\iw2003.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2748
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8C0E.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3076
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1180
- - C:\Users\Admin\AppData\Roaming\iw2003.exe
    "C:\Users\Admin\AppData\Roaming\iw2003.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2188

C:\Users\Admin\AppData\Roaming\iw2003.exe
"C:\Users\Admin\AppData\Roaming\iw2003.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:5404

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

tmp8C0E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8C0E.tmp.bat
Size 150B
SHA256 ea7ccec7b7361ac5ab467e5ec131ff0e86d48dace2b941b225faa7673c04f78d
MD5 60a969ab9b833c458da878f4fbb223e7
SHA1 256ee7a32449f90c8eb086589bf7fa3b11e5ccb8
SHA512 e8c9949328f3d9bbeacf91e9ee61e964f642c9daed35f8258d0aafc084c8b62b99767ecce59f7754fc4034b7baece7038585e344ce7dcedf11b2ef8b64c7cab5
TLSH
T12BC08C4269C5EA0E2906583302BAA88D926269993E40EB009304480E1284448E099242
MD5 SHA1 SHA512 TLSH

Submit Download

iw2003.exe

Path C:\Users\Admin\AppData\Roaming\iw2003.exe
Size 45KB
SHA256 ac63d47a9fb0efa14ddea224b004da98bf76423a4257a00896732fa46794d419
MD5 38b273067579f7a74527be386de0f029
SHA1 0c14bf6f10c3435fff2972885179dc9527297ed7
SHA512 866043eba041ccb1010f86f235dcbc9772aec11c9f1dbe83eb2eb4949e04586f2663f424f4108a7e86bfdde38665a3bb6d4dc5cb779e751f954f9581318a137c
SSDEEP 768:5udApTNctooWUS7C+mo2qt+CHyTtUPInzjbhgX3iOVC/yGpHAMKprBDZ0x:5udApTNmU2Jnjn3bOXSimped0x
TLSH
T1E7231B0037E8C22BF2BE4F78A8F26245867AF5773603D54A1CC451DB5623BC696426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3172-0-0x00000000002E0000-0x00000000002F2000-memory.dmp

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memory/3172-1-0x0000000004D90000-0x0000000004DA0000-memory.dmp

Download

memory/3172-2-0x0000000004CA0000-0x0000000004D3C000-memory.dmp

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memory/5404-10-0x0000000005050000-0x0000000005060000-memory.dmp

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memory/5404-13-0x0000000005050000-0x0000000005060000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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