asyncrat | 92ab9ed68950db61024eb5c5180f0019281a3bec96cd5a2f7305f450de064d4f

Analysis

max time kernel
300s
max time network
297s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
31/05/2024, 04:12

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General

Target
System.exe
Size 3.4MB
Sample240531-eskaesff93
SHA256 92ab9ed68950db61024eb5c5180f0019281a3bec96cd5a2f7305f450de064d4f
MD5 fb19368b80bb083a67bea154f2e7f4a6
SHA1 7bb20b8ee40c9f94dd77b8cd35920b1ba651ae86
SHA512 9fc041c4404602469314cf29cdae55d720bb26e8b37d774b13f7483a160c7fd0daea8d6274e7113a2c524630bf90d3b04513d04e19fe3f9cb216b44502f7c4f2
SSDEEP 49152:OnT6jNyvZdHzYjd3deChH/GBtNNwxry+3u1IRgQo37xcoMuFVhDb5Xqx:fQZdHod3ACBGBX+HgQvwV56x
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default discovery evasion rat themida trojan

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.5

Botnet

Default

Mutex

umldzqgmsvrmiibib

Attributes

c2_url_file
https://paste.fo/raw/53957c5e1888
delay
1
install
true
install_file
Registry.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	System.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	System.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	System.exe

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/1764-29-0x0000000001120000-0x0000000001A40000-memory.dmp	themida
behavioral2/memory/1764-30-0x0000000001120000-0x0000000001A40000-memory.dmp	themida

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	System.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1764	System.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2600	schtasks.exe

Modifies system certificate store 2 TTPs 3 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	System.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	System.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	System.exe

Suspicious behavior: EnumeratesProcesses 59 IoCs

pid	Process
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe
1764	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1764	System.exe
Token: SeDebugPrivilege	1764	System.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1764	System.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 2500	1764	System.exe	28
PID 1764 wrote to memory of 2500	1764	System.exe	28
PID 1764 wrote to memory of 2500	1764	System.exe	28
PID 1764 wrote to memory of 2500	1764	System.exe	28
PID 2500 wrote to memory of 2600	2500	cmd.exe	30
PID 2500 wrote to memory of 2600	2500	cmd.exe	30
PID 2500 wrote to memory of 2600	2500	cmd.exe	30
PID 2500 wrote to memory of 2600	2500	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\System.exe
"C:\Users\Admin\AppData\Local\Temp\System.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1764
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Registry" /tr '"C:\Users\Admin\AppData\Roaming\Registry.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2500
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Registry" /tr '"C:\Users\Admin\AppData\Roaming\Registry.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 342B
SHA256 d73d7a03eea39b413599ae564af9cd128ca87733e312ff3b47b2e8d9118e91e7
MD5 9b53c16d0d52de017b473e618ed4fcf2
SHA1 405c537ad0fd9c151f8875b616face3fc815b489
SHA512 15345b0a97f7367171ae3e526df655db3aec900806a9490cb469ddcb5b9c8f8426b36fd9f66f5840bd557216f7031fb70648f3ed053ee4eda6633ff414d33bcd
MD5 SHA1 SHA512

Submit Download

Tar35B7.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar35B7.tmp
Size 181KB
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b
SSDEEP 1536:aAZw/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mZ:as2J+qTR0XCy/dmASru2AijbdG
MD5 SHA1 SHA512 SSDEEP

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memory/1764-11-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-5-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-9-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-18-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-17-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-21-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-20-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-19-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-6-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-15-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-14-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-13-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-12-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-1-0x00000000760F4000-0x00000000760F5000-memory.dmp

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memory/1764-10-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-8-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-16-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-7-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-4-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-23-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-25-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-24-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-22-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-28-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-29-0x0000000001120000-0x0000000001A40000-memory.dmp

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memory/1764-30-0x0000000001120000-0x0000000001A40000-memory.dmp

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memory/1764-32-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-2-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-3-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-0-0x0000000001120000-0x0000000001A40000-memory.dmp

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memory/1764-120-0x00000000760E0000-0x00000000761F0000-memory.dmp

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memory/1764-121-0x00000000760F4000-0x00000000760F5000-memory.dmp

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