asyncrat | 8a58c64252e3abadfeda754f9e4ae6127df44b87df737b29b62199a7e17e884e

General

Target
tmpkk6lfdcz.exe
Size 45KB
Sample260522-ylewxaes4p
SHA256 8a58c64252e3abadfeda754f9e4ae6127df44b87df737b29b62199a7e17e884e
MD5 a8a23aa596e9d7c70b9bb31224f483f2
SHA1 e1ddd8b4c2bf366aa192a890adfd21a1d138bab5
SHA512 564e37a9272ed1b9fbaf49ff00f40635c80afeae7f0f58b9de540a3cbf1402e1163af542d49692ad2372e85c3d523009582eb4ab4dc5b13a8bcfcaac59c10866
SSDEEP 768:0uPipT/LGKeWUszuAmo2q9zwD/y/aqPIszjbLgX3i6FcvCQdEWvBDZ8x:0uPipT/qY2Qkhs3b0XS6FcvNZd8x
TLSH
T1D4233A003BE9C12BF2BE4F789DF26145467AB6633A03D68D1CC4119B5613FC68A526FE
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

artichokemacdougal.com:443
artichokemacdougal.com:80
artichokemacdougal.com:7797
artichokemacdougal.com:8707
artichokemacdougal.com:6620
www.artichokemacdougal.com:443
www.artichokemacdougal.com:80
www.artichokemacdougal.com:7797
www.artichokemacdougal.com:8707
www.artichokemacdougal.com:6620
remcos.artichokemacdougal.com:443
remcos.artichokemacdougal.com:80
remcos.artichokemacdougal.com:7797
remcos.artichokemacdougal.com:8707
remcos.artichokemacdougal.com:6620
azorult.artichokemacdougal.com:443
azorult.artichokemacdougal.com:80
azorult.artichokemacdougal.com:7797
azorult.artichokemacdougal.com:8707
azorult.artichokemacdougal.com:6620
clop.artichokemacdougal.com:443
clop.artichokemacdougal.com:80
clop.artichokemacdougal.com:7797
clop.artichokemacdougal.com:8707
clop.artichokemacdougal.com:6620

Mutex

HGeSGihatz6J

Attributes

delay
0
install
true
install_file
fqq7z75.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/0x00080000000242b8-8.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-1-5-21-204488895-2999877624-296153668-1000\Control Panel\International\Geo\Nation	tmpkk6lfdcz.exe

Executes dropped EXE 2 IoCs

pid	Process
880	fqq7z75.exe
3012	fqq7z75.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	tmpkk6lfdcz.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fqq7z75.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fqq7z75.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2456	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
3308	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe
4368	tmpkk6lfdcz.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4368	tmpkk6lfdcz.exe
Token: SeDebugPrivilege	880	fqq7z75.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4368 wrote to memory of 440	4368	tmpkk6lfdcz.exe	89
PID 4368 wrote to memory of 4704	4368	tmpkk6lfdcz.exe	91
PID 4704 wrote to memory of 2456	4704	cmd.exe	93
PID 440 wrote to memory of 3308	440	cmd.exe	94
PID 4704 wrote to memory of 3012	4704	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\tmpkk6lfdcz.exe
"C:\Users\Admin\AppData\Local\Temp\tmpkk6lfdcz.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4368
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "fqq7z75" /tr '"C:\Users\Admin\AppData\Roaming\fqq7z75.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:440
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "fqq7z75" /tr '"C:\Users\Admin\AppData\Roaming\fqq7z75.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3308
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp62BC.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4704
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2456
- - C:\Users\Admin\AppData\Roaming\fqq7z75.exe
    "C:\Users\Admin\AppData\Roaming\fqq7z75.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3012

C:\Users\Admin\AppData\Roaming\fqq7z75.exe
"C:\Users\Admin\AppData\Roaming\fqq7z75.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:880

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

tmp62BC.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp62BC.tmp.bat
Size 151B
SHA256 efa82702ab8df1c11104fdfb6cd7d0866b8f71ca18adb5a7d8e78032d6858a32
MD5 c3f5ba535e2f5921ba9257298ded0bdf
SHA1 04795c51116376977a61044f78070703f4df1074
SHA512 5c1da3ae8f3ffeb522269c875a0c8c4d86ab4a1833b124df2cbdafda5434d4a6d36d6070da532b7a7bd1a9134cdc1c4d765fa00feaf5736ec9e9bbc66dc361de
TLSH
T139C02B4361C6EB1F2C05389302FBD58C9176AC1E3F40FB00D704840D5380888F1E9385
MD5 SHA1 SHA512 TLSH

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fqq7z75.exe

Path C:\Users\Admin\AppData\Roaming\fqq7z75.exe
Size 45KB
SHA256 8a58c64252e3abadfeda754f9e4ae6127df44b87df737b29b62199a7e17e884e
MD5 a8a23aa596e9d7c70b9bb31224f483f2
SHA1 e1ddd8b4c2bf366aa192a890adfd21a1d138bab5
SHA512 564e37a9272ed1b9fbaf49ff00f40635c80afeae7f0f58b9de540a3cbf1402e1163af542d49692ad2372e85c3d523009582eb4ab4dc5b13a8bcfcaac59c10866
SSDEEP 768:0uPipT/LGKeWUszuAmo2q9zwD/y/aqPIszjbLgX3i6FcvCQdEWvBDZ8x:0uPipT/qY2Qkhs3b0XS6FcvNZd8x
TLSH
T1D4233A003BE9C12BF2BE4F789DF26145467AB6633A03D68D1CC4119B5613FC68A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/880-10-0x00000000052A0000-0x00000000052B0000-memory.dmp

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memory/880-13-0x00000000052A0000-0x00000000052B0000-memory.dmp

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memory/4368-0-0x0000000000610000-0x0000000000622000-memory.dmp

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memory/4368-1-0x0000000004F60000-0x0000000004F70000-memory.dmp

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memory/4368-2-0x0000000004E90000-0x0000000004F2C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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