asyncrat | 93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8

General

Target
93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
Size 45KB
Sample260731-sqmvesce53
SHA256 93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8
MD5 c0b34d07b8afe24d534fc4016b521480
SHA1 24b0d8c74f4b021dd135d12099114759615bf7c1
SHA512 d54da2edfd630a61991b5ec4faac65799eaccfe432c4b20ff7c910d519a9fd0d0145fa437251e08d736d0999dd1ad39e91e14302d41f5d0e9b6c44051519c61d
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNVcQSCBznqNLPI7zjbEgX3imv9+I9Nv2BDZ0x:5uSy6pTpoo2Ec9UqC73bLXSmlVAd0x
TLSH
T163232B003BE9812BF2BE4F7498F26145467AF6633603E54D2CC452DB5613FC69A42AFE
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

xemsexxx.me:80
xemsexxx.me:22
xemsexxx.me:8080
xemsexxx.me:8880
xemsexxx.me:2052
xemsexxx.me:2082
xemsexxx.me:2086
xemsexxx.me:2095
xemsexxx.me:443
xemsexxx.me:2053
xemsexxx.me:2083
xemsexxx.me:2087
xemsexxx.me:2096
xemsexxx.me:8443
www.xemsexxx.me:80
www.xemsexxx.me:22
www.xemsexxx.me:8080
www.xemsexxx.me:8880
www.xemsexxx.me:2052
www.xemsexxx.me:2082
www.xemsexxx.me:2086
www.xemsexxx.me:2095
www.xemsexxx.me:443
www.xemsexxx.me:2053
www.xemsexxx.me:2083
www.xemsexxx.me:2087
www.xemsexxx.me:2096
www.xemsexxx.me:8443
qakbot.xemsexxx.me:80
qakbot.xemsexxx.me:22
qakbot.xemsexxx.me:8080
qakbot.xemsexxx.me:8880
qakbot.xemsexxx.me:2052
qakbot.xemsexxx.me:2082
qakbot.xemsexxx.me:2086
qakbot.xemsexxx.me:2095
qakbot.xemsexxx.me:443
qakbot.xemsexxx.me:2053
qakbot.xemsexxx.me:2083
qakbot.xemsexxx.me:2087
qakbot.xemsexxx.me:2096
qakbot.xemsexxx.me:8443
sobig.xemsexxx.me:80
sobig.xemsexxx.me:22
sobig.xemsexxx.me:8080
sobig.xemsexxx.me:8880
sobig.xemsexxx.me:2052
sobig.xemsexxx.me:2082
sobig.xemsexxx.me:2086
sobig.xemsexxx.me:2095
sobig.xemsexxx.me:443
sobig.xemsexxx.me:2053
sobig.xemsexxx.me:2083
sobig.xemsexxx.me:2087
sobig.xemsexxx.me:2096
sobig.xemsexxx.me:8443

Mutex

IM0oI0GA2xSV

Attributes

delay
0
install
true
install_file
7sdyyrz.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/0x00080000000245f2-8.dat	family_asyncrat
behavioral1/memory/3916-13-0x00000000049C0000-0x00000000049D0000-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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe

Executes dropped EXE 2 IoCs

pid	Process
3916	7sdyyrz.exe
1440	7sdyyrz.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	65	172.67.167.67:22	3916	7sdyyrz.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
3044	cmd.exe
1152	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	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	7sdyyrz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	7sdyyrz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2612	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
2280	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
Token: SeDebugPrivilege	3916	7sdyyrz.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3092 wrote to memory of 3044	3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe	85
PID 3092 wrote to memory of 1152	3092	93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe	87
PID 1152 wrote to memory of 2612	1152	cmd.exe	89
PID 3044 wrote to memory of 2280	3044	cmd.exe	90
PID 1152 wrote to memory of 1440	1152	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe
"C:\Users\Admin\AppData\Local\Temp\93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "7sdyyrz" /tr '"C:\Users\Admin\AppData\Roaming\7sdyyrz.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3044
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "7sdyyrz" /tr '"C:\Users\Admin\AppData\Roaming\7sdyyrz.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2280
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3CA6.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1152
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2612
- - C:\Users\Admin\AppData\Roaming\7sdyyrz.exe
    "C:\Users\Admin\AppData\Roaming\7sdyyrz.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1440

C:\Users\Admin\AppData\Roaming\7sdyyrz.exe
"C:\Users\Admin\AppData\Roaming\7sdyyrz.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3916

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

tmp3CA6.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3CA6.tmp.bat
Size 151B
SHA256 fdf57a2f01aae8fc729c9caf777ebc1ae84c7d74a20cec60d827b83e4557cf5d
MD5 6eb7e31a17912fdb438332aff6021da5
SHA1 eb78cfc04573f7889cb311ea4adabd9817ff2e72
SHA512 831626457480a08b9ab6fdbec92eac662ef496eb2dc8cbe35b03e4a6bef6aa1388c9912340a57f147bb164764397ca66a1e1d589ee730339bf976469a7783fd6
TLSH
T164C08C4351C5EA0F2905141302BA949D9172A8193E80EB8083048009228088CF0A9281
MD5 SHA1 SHA512 TLSH

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7sdyyrz.exe

Path C:\Users\Admin\AppData\Roaming\7sdyyrz.exe
Size 45KB
SHA256 93e878c0bf05b1f2604d20d1c212b3992de8b9aff5bad1a68cbdffbe175ab8d8
MD5 c0b34d07b8afe24d534fc4016b521480
SHA1 24b0d8c74f4b021dd135d12099114759615bf7c1
SHA512 d54da2edfd630a61991b5ec4faac65799eaccfe432c4b20ff7c910d519a9fd0d0145fa437251e08d736d0999dd1ad39e91e14302d41f5d0e9b6c44051519c61d
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNVcQSCBznqNLPI7zjbEgX3imv9+I9Nv2BDZ0x:5uSy6pTpoo2Ec9UqC73bLXSmlVAd0x
TLSH
T163232B003BE9812BF2BE4F7498F26145467AF6633603E54D2CC452DB5613FC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/3092-0-0x0000000000B90000-0x0000000000BA2000-memory.dmp

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memory/3092-1-0x0000000005520000-0x0000000005530000-memory.dmp

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memory/3092-2-0x00000000055D0000-0x000000000566C000-memory.dmp

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memory/3916-10-0x00000000049C0000-0x00000000049D0000-memory.dmp

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memory/3916-13-0x00000000049C0000-0x00000000049D0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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