asyncrat | 916049b956a4db4cbcbdfb612f7cb13413e4beb2282f6cddee30038378ce3748

Resubmissions

03/05/2024, 03:00

240503-dhq5jsdd5110

03/05/2024, 02:57

240503-dfyfvafe5410

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
03/05/2024, 02:57

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General

Target
asd.exe
Size 74KB
Sample240503-dfyfvafe54
SHA256 916049b956a4db4cbcbdfb612f7cb13413e4beb2282f6cddee30038378ce3748
MD5 041009ada3c0371d1fcf69a8ed984e3f
SHA1 dd2265310cf6bc59a770609b1cd405488125582d
SHA512 c408aaed60e453aa965054421cb3a2344fea093504d31af4477d57caebac37660dff61db9aca24057531d69b607fb03314d1e960fcae442abef492f9824464f2
SSDEEP 1536:/5U1AcxqXPC/2PMV1sIM+rYYYPYYYYYYYYYFSYFYY6MYY99bzYYt4IGX1bs/fMQ0:BUKcxqfs2PMV1bM+CX1bssQHBY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

147.185.221.19:42550

Attributes

delay
1
install
true
install_file
test.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/0x003a000000013a3f-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
852	test.exe

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
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
3048	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2676	timeout.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
1684	asd.exe
1684	asd.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe
852	test.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1684	asd.exe
Token: SeDebugPrivilege	852	test.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
852	test.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 2336	1684	asd.exe	28
PID 1684 wrote to memory of 2336	1684	asd.exe	28
PID 1684 wrote to memory of 2336	1684	asd.exe	28
PID 1684 wrote to memory of 2064	1684	asd.exe	30
PID 1684 wrote to memory of 2064	1684	asd.exe	30
PID 1684 wrote to memory of 2064	1684	asd.exe	30
PID 2336 wrote to memory of 3048	2336	cmd.exe	32
PID 2336 wrote to memory of 3048	2336	cmd.exe	32
PID 2336 wrote to memory of 3048	2336	cmd.exe	32
PID 2064 wrote to memory of 2676	2064	cmd.exe	33
PID 2064 wrote to memory of 2676	2064	cmd.exe	33
PID 2064 wrote to memory of 2676	2064	cmd.exe	33
PID 2064 wrote to memory of 852	2064	cmd.exe	34
PID 2064 wrote to memory of 852	2064	cmd.exe	34
PID 2064 wrote to memory of 852	2064	cmd.exe	34

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\asd.exe
"C:\Users\Admin\AppData\Local\Temp\asd.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:3048
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1065.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2064
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2676
- - C:\Users\Admin\AppData\Roaming\test.exe
    "C:\Users\Admin\AppData\Roaming\test.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:852

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

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

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 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

Submit Download

Tar3DF1.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar3DF1.tmp
Size 177KB
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
SSDEEP 1536:fAo/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mJ:f/J+qTR0XCy/dmASru2Aijbdq
MD5 SHA1 SHA512 SSDEEP

Submit Download

tmp1065.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1065.tmp.bat
Size 148B
SHA256 93b545380d95757a6f7883d216e8378c872f1c2f20d66238e91f31b136383d7e
MD5 4a8f313b6afb95ab44001943187ace16
SHA1 fa7831deccb9336edef7ef7be42924ac9584d741
SHA512 e100efee2f9c6de24e8d7a1844275556b7fd0ab101b5fbe63052f855e3bb2a0f7fa59770a7ad6661f085a8284156d1946bbbaa9e4d0d0f5cd68b7ec56b9bbacc
MD5 SHA1 SHA512

Submit Download

DataLogs.conf

Path C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
Size 8B
SHA256 c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
MD5 cf759e4c5f14fe3eec41b87ed756cea8
SHA1 c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA512 c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b
MD5 SHA1 SHA512

Submit Download

test.exe

Path C:\Users\Admin\AppData\Roaming\test.exe
Size 74KB
SHA256 916049b956a4db4cbcbdfb612f7cb13413e4beb2282f6cddee30038378ce3748
MD5 041009ada3c0371d1fcf69a8ed984e3f
SHA1 dd2265310cf6bc59a770609b1cd405488125582d
SHA512 c408aaed60e453aa965054421cb3a2344fea093504d31af4477d57caebac37660dff61db9aca24057531d69b607fb03314d1e960fcae442abef492f9824464f2
SSDEEP 1536:/5U1AcxqXPC/2PMV1sIM+rYYYPYYYYYYYYYFSYFYY6MYY99bzYYt4IGX1bs/fMQ0:BUKcxqfs2PMV1bM+CX1bssQHBY
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/852-18-0x0000000000940000-0x0000000000958000-memory.dmp

Download

memory/1684-0-0x000007FEF5FA3000-0x000007FEF5FA4000-memory.dmp

Download

memory/1684-1-0x0000000001220000-0x0000000001238000-memory.dmp

Download

memory/1684-3-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Download

memory/1684-13-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

Download

memory/1684-14-0x000007FEF5FA0000-0x000007FEF698C000-memory.dmp

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