asyncrat | 83c854b5ab60971d9d00fe88f9ec5238087b27ac2a7606e34d249778d430b445

General

Target
ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe
Size 63KB
Sample240802-cjpgnsthlc
SHA256 ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a
MD5 5f00c912f2ac12df8525a30afb8f776e
SHA1 516af350678a65e9e10901b8c990ef4601ae0844
SHA512 5e9e96ed14d4c1fff020d9d1d00f137cbf1121cd5c3c58a054002d7d1f29a417b6f2f71d8f534c7207ea6bd87a3b57d7afea76390b90a1c8badf482dbba710d5
SSDEEP 1536:FhMpLbRQkB4+ENds+jFBncsSRoAGbbzwHvGHtpqKmY7:FhMpLbRQkB4tds+jFBl2JGbbzt2z
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.2

Botnet

Default

C2

stores-less.gl.at.ply.gg:45080

Mutex

AtomRatMutex_penka

Attributes

delay
1
install
true
install_file
svchost.exe
install_folder
%AppData%

aes.plain

Signatures

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/0x00080000000120fc-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2840	svchost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2856	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
2740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe
Token: SeDebugPrivilege	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe
Token: SeDebugPrivilege	2840	svchost.exe
Token: SeDebugPrivilege	2840	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2468	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe	29
PID 2280 wrote to memory of 2468	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe	29
PID 2280 wrote to memory of 2468	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe	29
PID 2280 wrote to memory of 1728	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe	30
PID 2280 wrote to memory of 1728	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe	30
PID 2280 wrote to memory of 1728	2280	ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe	30
PID 2468 wrote to memory of 2740	2468	cmd.exe	33
PID 2468 wrote to memory of 2740	2468	cmd.exe	33
PID 2468 wrote to memory of 2740	2468	cmd.exe	33
PID 1728 wrote to memory of 2856	1728	cmd.exe	34
PID 1728 wrote to memory of 2856	1728	cmd.exe	34
PID 1728 wrote to memory of 2856	1728	cmd.exe	34
PID 1728 wrote to memory of 2840	1728	cmd.exe	35
PID 1728 wrote to memory of 2840	1728	cmd.exe	35
PID 1728 wrote to memory of 2840	1728	cmd.exe	35

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe
"C:\Users\Admin\AppData\Local\Temp\ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2740
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4F97.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1728
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2856
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2840

Network

MITRE ATT&CK Enterprise v15

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp4F97.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4F97.tmp.bat
Size 151B
SHA256 1e8bf0f0970c63e39fd9f0a11e0378d54380e8a2a127b54e3654399849e63aa7
MD5 8e0f4a04e32291cb725e349dc5df9d37
SHA1 8cdf83663b0a7d450864b31b88fc1fc19330d3f9
SHA512 d40ca98447cb4dd91baaa58a10cf551ebd8fe3d5b43b0f2d10f0cd8b1068f62dc54dc62502f407b684fcda2d52e5f327439dbe2979a429cc17b349319ddad8dc
MD5 SHA1 SHA512

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svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 63KB
SHA256 ffe2d2e6b930f0b8f752d2a478d77cfbf9467006d294474fe33970a8c529b75a
MD5 5f00c912f2ac12df8525a30afb8f776e
SHA1 516af350678a65e9e10901b8c990ef4601ae0844
SHA512 5e9e96ed14d4c1fff020d9d1d00f137cbf1121cd5c3c58a054002d7d1f29a417b6f2f71d8f534c7207ea6bd87a3b57d7afea76390b90a1c8badf482dbba710d5
SSDEEP 1536:FhMpLbRQkB4+ENds+jFBncsSRoAGbbzwHvGHtpqKmY7:FhMpLbRQkB4tds+jFBl2JGbbzt2z
MD5 SHA1 SHA512 SSDEEP

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memory/2280-0-0x000007FEF6663000-0x000007FEF6664000-memory.dmp

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memory/2280-1-0x0000000000DD0000-0x0000000000DE6000-memory.dmp

Download

memory/2280-2-0x000007FEF6660000-0x000007FEF704C000-memory.dmp

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memory/2280-12-0x000007FEF6660000-0x000007FEF704C000-memory.dmp

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memory/2280-11-0x000007FEF6660000-0x000007FEF704C000-memory.dmp

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memory/2840-17-0x00000000003C0000-0x00000000003D6000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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