asyncrat | e9c77ee7b0875a63e76e36a06b6532f2f8f5a948d9b069320bdbd91766cd71b4

General

Target
tmpa6i6vpfh.exe
Size 45KB
Sample260522-y1v7faev4p
SHA256 e9c77ee7b0875a63e76e36a06b6532f2f8f5a948d9b069320bdbd91766cd71b4
MD5 d20b8c883280e463d41eeb67c1a1c5b1
SHA1 01ec44524cb2ca68dff5bbacb5841f641146adc4
SHA512 aaa470d6b077fd06bc1282b2b633c22ad382f5a3a05dc1b7a3bcd4a225465ea8d81997b6f9973162ebeb307d020eb212d416b62f9ade84b949eafbbdb5867a0e
SSDEEP 768:5udNpTNctooWUS7C+mo2qtm/NYssPJZOPIczzjbTgXuioPWih5H2DhABDZ0x:5udNpTNmU2ZHIf3cz3bMXXoVfWDMd0x
TLSH
T1D3231B0037E8822BF2BE4F789DF25145867AF2773A03D59A1CC451D75713BC68642AEE
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

banglabazar-onlineshop.com:443
banglabazar-onlineshop.com:80
banglabazar-onlineshop.com:7797
banglabazar-onlineshop.com:8707
banglabazar-onlineshop.com:6620
www.banglabazar-onlineshop.com:443
www.banglabazar-onlineshop.com:80
www.banglabazar-onlineshop.com:7797
www.banglabazar-onlineshop.com:8707
www.banglabazar-onlineshop.com:6620
connect.banglabazar-onlineshop.com:443
connect.banglabazar-onlineshop.com:80
connect.banglabazar-onlineshop.com:7797
connect.banglabazar-onlineshop.com:8707
connect.banglabazar-onlineshop.com:6620
stuxnet.banglabazar-onlineshop.com:443
stuxnet.banglabazar-onlineshop.com:80
stuxnet.banglabazar-onlineshop.com:7797
stuxnet.banglabazar-onlineshop.com:8707
stuxnet.banglabazar-onlineshop.com:6620

Mutex

REzoiSQ1Ekix

Attributes

delay
0
install
true
install_file
e53bvp.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
behavioral1/files/0x000700000001e6cf-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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	tmpa6i6vpfh.exe

Executes dropped EXE 2 IoCs

pid	Process
4300	e53bvp.exe
3328	e53bvp.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	e53bvp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e53bvp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpa6i6vpfh.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4068	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
4648	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe
452	tmpa6i6vpfh.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	tmpa6i6vpfh.exe
Token: SeDebugPrivilege	4300	e53bvp.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4076	452	tmpa6i6vpfh.exe	87
PID 452 wrote to memory of 2056	452	tmpa6i6vpfh.exe	89
PID 2056 wrote to memory of 4068	2056	cmd.exe	91
PID 4076 wrote to memory of 4648	4076	cmd.exe	92
PID 2056 wrote to memory of 3328	2056	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\tmpa6i6vpfh.exe
"C:\Users\Admin\AppData\Local\Temp\tmpa6i6vpfh.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "e53bvp" /tr '"C:\Users\Admin\AppData\Roaming\e53bvp.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4076
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "e53bvp" /tr '"C:\Users\Admin\AppData\Roaming\e53bvp.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4648
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8BE0.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2056
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4068
- - C:\Users\Admin\AppData\Roaming\e53bvp.exe
    "C:\Users\Admin\AppData\Roaming\e53bvp.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3328

C:\Users\Admin\AppData\Roaming\e53bvp.exe
"C:\Users\Admin\AppData\Roaming\e53bvp.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4300

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

tmp8BE0.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp8BE0.tmp.bat
Size 150B
SHA256 30dba9cf21970425891e035e7006ba5c9a20e1448047b7d4a9f727a34c366b13
MD5 198b9746e41c6db3ba01573ac6a36492
SHA1 49a6f054da982ce584228d8520c5b7e22586a5a7
SHA512 eed7152ce88a04905cfb97fde338dce495f8e1567fe8f361143ba7b131e9d7c495e70ea071e2f1a80e21a10ba05e55747248b4f81b7e9f7f464f24d2be16cdf4
TLSH
T1EAC08C5261C9AA1E290994332ABA948E92666C193E84AB00835444096280448E0A9241
MD5 SHA1 SHA512 TLSH

Submit Download

e53bvp.exe

Path C:\Users\Admin\AppData\Roaming\e53bvp.exe
Size 45KB
SHA256 e9c77ee7b0875a63e76e36a06b6532f2f8f5a948d9b069320bdbd91766cd71b4
MD5 d20b8c883280e463d41eeb67c1a1c5b1
SHA1 01ec44524cb2ca68dff5bbacb5841f641146adc4
SHA512 aaa470d6b077fd06bc1282b2b633c22ad382f5a3a05dc1b7a3bcd4a225465ea8d81997b6f9973162ebeb307d020eb212d416b62f9ade84b949eafbbdb5867a0e
SSDEEP 768:5udNpTNctooWUS7C+mo2qtm/NYssPJZOPIczzjbTgXuioPWih5H2DhABDZ0x:5udNpTNmU2ZHIf3cz3bMXXoVfWDMd0x
TLSH
T1D3231B0037E8822BF2BE4F789DF25145867AF2773A03D59A1CC451D75713BC68642AEE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/452-0-0x0000000000230000-0x0000000000242000-memory.dmp

Download

memory/452-1-0x0000000004D00000-0x0000000004D10000-memory.dmp

Download

memory/452-2-0x0000000004BF0000-0x0000000004C8C000-memory.dmp

Download

memory/4300-10-0x0000000005490000-0x00000000054A0000-memory.dmp

Download

memory/4300-13-0x0000000005490000-0x00000000054A0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads