asyncrat | fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df

General

Target

MicroStrap.exe
Size

74KB
MD5

9785b81af0d8b024dadd31659a3a2d24
SHA1

14f4539dc755b69ad28f9c1953aeec3620669588
SHA256

fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df
SHA512

002df3d93cde212d4a9678f167201599d5e874defe15f2e46494d72f442692bf62a8fcfa226963f0575335f0b1062a61508ca143b95614eef4a6d7cd563c5120
SSDEEP

1536:OUKkcx9pXCTyPMVEZ8kyIgH1bO/zeoBDQzcOLVclN:OUDcx958yPMVEZ81H1bOLRDQHBY

Score

10^/10

asyncrat venomrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

195.88.218.126:2404

Mutex

rnxgsvfqmra

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
Asyncrat family
asyncrat

VenomRAT 3 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral1/memory/1600-1-0x00000000011C0000-0x00000000011D8000-memory.dmp	VenomRAT
behavioral1/files/0x0038000000017021-16.dat	VenomRAT
behavioral1/memory/2840-18-0x0000000001230000-0x0000000001248000-memory.dmp	VenomRAT

Venomrat family
venomrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0038000000017021-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2840	svchost.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3008	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
3000	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
1600	MicroStrap.exe
1600	MicroStrap.exe
1600	MicroStrap.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe
2840	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1600	MicroStrap.exe
Token: SeDebugPrivilege	2840	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2840	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1600 wrote to memory of 2892	1600	MicroStrap.exe	30
PID 1600 wrote to memory of 2892	1600	MicroStrap.exe	30
PID 1600 wrote to memory of 2892	1600	MicroStrap.exe	30
PID 1600 wrote to memory of 2804	1600	MicroStrap.exe	31
PID 1600 wrote to memory of 2804	1600	MicroStrap.exe	31
PID 1600 wrote to memory of 2804	1600	MicroStrap.exe	31
PID 2804 wrote to memory of 3008	2804	cmd.exe	34
PID 2804 wrote to memory of 3008	2804	cmd.exe	34
PID 2804 wrote to memory of 3008	2804	cmd.exe	34
PID 2892 wrote to memory of 3000	2892	cmd.exe	35
PID 2892 wrote to memory of 3000	2892	cmd.exe	35
PID 2892 wrote to memory of 3000	2892	cmd.exe	35
PID 2804 wrote to memory of 2840	2804	cmd.exe	36
PID 2804 wrote to memory of 2840	2804	cmd.exe	36
PID 2804 wrote to memory of 2840	2804	cmd.exe	36

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\MicroStrap.exe
"C:\Users\Admin\AppData\Local\Temp\MicroStrap.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1600
- 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:2892
- - 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:3000
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7A10.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2804
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:3008
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    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

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab8EAB.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarA153.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7A10.tmp.bat

Filesize
151B

MD5
d9d9d78607167233bfd651ee9f3aa795

SHA1
372a9fe2293fd56575e4eba72df28d652a25b314

SHA256
088b75dc48dd6a177a8d56b70c6a843cbcd38fa0bdbb204d39fd00f815651342

SHA512
ed41382a21d86dc2e8d79cb9fa97fd819ba7d357cc15c08df0ef0c9998ebae8cb6affe629975900aae368e4fdaa0138df460c6c03a5921900d9a065f041f522b

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
74KB

MD5
9785b81af0d8b024dadd31659a3a2d24

SHA1
14f4539dc755b69ad28f9c1953aeec3620669588

SHA256
fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df

SHA512
002df3d93cde212d4a9678f167201599d5e874defe15f2e46494d72f442692bf62a8fcfa226963f0575335f0b1062a61508ca143b95614eef4a6d7cd563c5120

Download Submit
memory/1600-0-0x000007FEF5D23000-0x000007FEF5D24000-memory.dmp

Filesize
4KB

Download
memory/1600-1-0x00000000011C0000-0x00000000011D8000-memory.dmp

Filesize
96KB

Download
memory/1600-3-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/1600-12-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/1600-14-0x000007FEF5D20000-0x000007FEF670C000-memory.dmp

Filesize
9.9MB

Download
memory/2840-18-0x0000000001230000-0x0000000001248000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads