asyncrat | 79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d

General

Target
79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
Size 45KB
Sample260601-tfg2vsbs9l
SHA256 79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d
MD5 798499d92e87bda2246b73dc94f085d5
SHA1 21fbbac1e8b91038a03cd725b270052ba728d6e1
SHA512 5b7a6c9e52257fa8953af17772d5a6107430a8d40144bfc7f1b331e0875f94dbfadb0299b4b06fd34806053ce3b5b1c1ee002c507b9c0214864f65dcc6a02fb1
SSDEEP 768:xuRXNT9gGHBWUZohrmo2q9zzjHy/aKPIb+jbjgX3iF4GawZK5BDZzx:xuRXNT9Bw2Qnhbyb8XSF4twGdzx
TLSH
T188232B0037E9C12BF2BE4F789DF26145467AF6732603D6891CC4119B5713BC68A52AFE
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

phimsetvietnam.vip:443
phimsetvietnam.vip:80
phimsetvietnam.vip:7797
phimsetvietnam.vip:8707
phimsetvietnam.vip:6620
www.phimsetvietnam.vip:443
www.phimsetvietnam.vip:80
www.phimsetvietnam.vip:7797
www.phimsetvietnam.vip:8707
www.phimsetvietnam.vip:6620
formbook.phimsetvietnam.vip:443
formbook.phimsetvietnam.vip:80
formbook.phimsetvietnam.vip:7797
formbook.phimsetvietnam.vip:8707
formbook.phimsetvietnam.vip:6620
zeus.phimsetvietnam.vip:443
zeus.phimsetvietnam.vip:80
zeus.phimsetvietnam.vip:7797
zeus.phimsetvietnam.vip:8707
zeus.phimsetvietnam.vip:6620

Mutex

AdBuS3tpOzgy

Attributes

delay
0
install
true
install_file
m8f7917.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
behavioral2/files/0x001b00000002b3c4-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1660	m8f7917.exe
2852	m8f7917.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	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.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	m8f7917.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	m8f7917.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4360	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
2116	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
Token: SeDebugPrivilege	1660	m8f7917.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4580 wrote to memory of 3100	4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe	80
PID 4580 wrote to memory of 4844	4580	79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe	82
PID 4844 wrote to memory of 4360	4844	cmd.exe	84
PID 3100 wrote to memory of 2116	3100	cmd.exe	85
PID 4844 wrote to memory of 2852	4844	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe
"C:\Users\Admin\AppData\Local\Temp\79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4580
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "m8f7917" /tr '"C:\Users\Admin\AppData\Roaming\m8f7917.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3100
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "m8f7917" /tr '"C:\Users\Admin\AppData\Roaming\m8f7917.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2116
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2A57.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4844
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4360
- - C:\Users\Admin\AppData\Roaming\m8f7917.exe
    "C:\Users\Admin\AppData\Roaming\m8f7917.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2852

C:\Users\Admin\AppData\Roaming\m8f7917.exe
"C:\Users\Admin\AppData\Roaming\m8f7917.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1660

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

System Information Discovery

1

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

tmp2A57.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2A57.tmp.bat
Size 151B
SHA256 c21d86b73406e5e4bc36943a959f6cd8ebea1ec570131a8fc7d465287dc98bfd
MD5 964cc3da37143d9a4e9e79c4ebefb861
SHA1 1f6a05cfa04af09dfa028be20175c50b555cedef
SHA512 23b62506f9efa5aa79af043d5aaf27d8b1e29cd4dee6727a9e8dbbc7f0827a7485bb0daa665a49f8c5412b7cb722899bfddeba6a0e274527942fb70cfa94c462
TLSH
T1F5C02B4365C5EB6E290594130AFAE59C91B26C1A3F40BB40C70F800E12C14C9F0D9341
MD5 SHA1 SHA512 TLSH

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m8f7917.exe

Path C:\Users\Admin\AppData\Roaming\m8f7917.exe
Size 45KB
SHA256 79a6ffed22f60eab24e7122048d18cc3f70f98a4940967bb98697d95c71cb72d
MD5 798499d92e87bda2246b73dc94f085d5
SHA1 21fbbac1e8b91038a03cd725b270052ba728d6e1
SHA512 5b7a6c9e52257fa8953af17772d5a6107430a8d40144bfc7f1b331e0875f94dbfadb0299b4b06fd34806053ce3b5b1c1ee002c507b9c0214864f65dcc6a02fb1
SSDEEP 768:xuRXNT9gGHBWUZohrmo2q9zzjHy/aKPIb+jbjgX3iF4GawZK5BDZzx:xuRXNT9Bw2Qnhbyb8XSF4twGdzx
TLSH
T188232B0037E9C12BF2BE4F789DF26145467AF6732603D6891CC4119B5713BC68A52AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4580-0-0x0000000000B10000-0x0000000000B22000-memory.dmp

Download

memory/4580-1-0x0000000005510000-0x0000000005520000-memory.dmp

Download

memory/4580-2-0x00000000055C0000-0x000000000565C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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