asyncrat | 38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208

General

Target
38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
Size 45KB
Sample260715-nsa67abs7k
SHA256 38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208
MD5 d3f3a544069174377566320272f34f2d
SHA1 3563e497f2d800079764bca635c23b5a8d25eda6
SHA512 17ab2624cf1abac5c02c4059ccdca284efab24f441ee939876fce09ba6f3f12521026f3875096775ffcd9fd35022a4532bab6e8bb3013856a9883c50e7c3c325
SSDEEP 768:8uuSpTg7GBoWUSH6+mo2qYEZoQTMtPI4njbUgX3i4HmV8QGe0UROqdynBDZ0x:8uuSpTgyf2sL34jb7XS4GVAHd0x
TLSH
T1E5232B0037E9812BF2BE4F7898F26145867AF6673A03D58D1CC451DB1623FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

sexviet11.com:80
sexviet11.com:22
sexviet11.com:8080
sexviet11.com:8880
sexviet11.com:2052
sexviet11.com:2082
sexviet11.com:2086
sexviet11.com:2095
sexviet11.com:443
sexviet11.com:2053
sexviet11.com:2083
sexviet11.com:2087
sexviet11.com:2096
sexviet11.com:8443
www.sexviet11.com:80
www.sexviet11.com:22
www.sexviet11.com:8080
www.sexviet11.com:8880
www.sexviet11.com:2052
www.sexviet11.com:2082
www.sexviet11.com:2086
www.sexviet11.com:2095
www.sexviet11.com:443
www.sexviet11.com:2053
www.sexviet11.com:2083
www.sexviet11.com:2087
www.sexviet11.com:2096
www.sexviet11.com:8443
malware.sexviet11.com:80
malware.sexviet11.com:22
malware.sexviet11.com:8080
malware.sexviet11.com:8880
malware.sexviet11.com:2052
malware.sexviet11.com:2082
malware.sexviet11.com:2086
malware.sexviet11.com:2095
malware.sexviet11.com:443
malware.sexviet11.com:2053
malware.sexviet11.com:2083
malware.sexviet11.com:2087
malware.sexviet11.com:2096
malware.sexviet11.com:8443
client.sexviet11.com:80
client.sexviet11.com:22
client.sexviet11.com:8080
client.sexviet11.com:8880
client.sexviet11.com:2052
client.sexviet11.com:2082
client.sexviet11.com:2086
client.sexviet11.com:2095
client.sexviet11.com:443
client.sexviet11.com:2053
client.sexviet11.com:2083
client.sexviet11.com:2087
client.sexviet11.com:2096
client.sexviet11.com:8443
iloveyou.sexviet11.com:80
iloveyou.sexviet11.com:22
iloveyou.sexviet11.com:8080
iloveyou.sexviet11.com:8880
iloveyou.sexviet11.com:2052
iloveyou.sexviet11.com:2082
iloveyou.sexviet11.com:2086
iloveyou.sexviet11.com:2095
iloveyou.sexviet11.com:443
iloveyou.sexviet11.com:2053
iloveyou.sexviet11.com:2083
iloveyou.sexviet11.com:2087
iloveyou.sexviet11.com:2096
iloveyou.sexviet11.com:8443
nanocore.sexviet11.com:80
nanocore.sexviet11.com:22
nanocore.sexviet11.com:8080
nanocore.sexviet11.com:8880
nanocore.sexviet11.com:2052
nanocore.sexviet11.com:2082
nanocore.sexviet11.com:2086
nanocore.sexviet11.com:2095
nanocore.sexviet11.com:443
nanocore.sexviet11.com:2053
nanocore.sexviet11.com:2083
nanocore.sexviet11.com:2087
nanocore.sexviet11.com:2096
nanocore.sexviet11.com:8443

Mutex

Hxh9LDbd4bS4

Attributes

delay
0
install
true
install_file
pprexc.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/0x001a0000000242f7-8.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-1-5-21-876885714-46325919-1482798410-1000\Control Panel\International\Geo\Nation	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe

Executes dropped EXE 2 IoCs

pid	Process
1788	pprexc.exe
4008	pprexc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	pprexc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pprexc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1064	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
3816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
Token: SeDebugPrivilege	1788	pprexc.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 3264	1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe	86
PID 1712 wrote to memory of 1164	1712	38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe	88
PID 1164 wrote to memory of 1064	1164	cmd.exe	90
PID 3264 wrote to memory of 3816	3264	cmd.exe	91
PID 1164 wrote to memory of 4008	1164	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe
"C:\Users\Admin\AppData\Local\Temp\38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "pprexc" /tr '"C:\Users\Admin\AppData\Roaming\pprexc.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3264
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "pprexc" /tr '"C:\Users\Admin\AppData\Roaming\pprexc.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3816
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7450.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1164
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1064
- - C:\Users\Admin\AppData\Roaming\pprexc.exe
    "C:\Users\Admin\AppData\Roaming\pprexc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4008

C:\Users\Admin\AppData\Roaming\pprexc.exe
"C:\Users\Admin\AppData\Roaming\pprexc.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1788

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp7450.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7450.tmp.bat
Size 150B
SHA256 24ef9c5ae079f3c2b8c5fb86197b58ee64b3eff74f7cce899ac0f58efd6e55bd
MD5 0e7fda0c3ffda52ca10bd585fd8b9f66
SHA1 37f702570228b3431df62991d045e7992a80f5a7
SHA512 353a8bb8408d63f8bdc532cf7f09780271d06140c1e4e169bba2ea4114f779e5304acaba3e2d4b4862abdf34e12c1bb0518fb489e587393ab8d2aea5a24c401b
TLSH
T1E5C02B57AAC6EB4E6C0654A712FAD4CCA1726C193F80BB40C30C804D2280489F4D9341
MD5 SHA1 SHA512 TLSH

Submit Download

pprexc.exe

Path C:\Users\Admin\AppData\Roaming\pprexc.exe
Size 45KB
SHA256 38a4ecc24ee77c4de5860550530fb5bf75702b5fde298ef332397e98e64f1208
MD5 d3f3a544069174377566320272f34f2d
SHA1 3563e497f2d800079764bca635c23b5a8d25eda6
SHA512 17ab2624cf1abac5c02c4059ccdca284efab24f441ee939876fce09ba6f3f12521026f3875096775ffcd9fd35022a4532bab6e8bb3013856a9883c50e7c3c325
SSDEEP 768:8uuSpTg7GBoWUSH6+mo2qYEZoQTMtPI4njbUgX3i4HmV8QGe0UROqdynBDZ0x:8uuSpTgyf2sL34jb7XS4GVAHd0x
TLSH
T1E5232B0037E9812BF2BE4F7898F26145867AF6673A03D58D1CC451DB1623FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1712-0-0x0000000000AF0000-0x0000000000B02000-memory.dmp

Download

memory/1712-1-0x0000000005460000-0x0000000005470000-memory.dmp

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memory/1712-2-0x0000000005510000-0x00000000055AC000-memory.dmp

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memory/1788-10-0x0000000004F30000-0x0000000004F40000-memory.dmp

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memory/1788-13-0x0000000004F30000-0x0000000004F40000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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