asyncrat | 9706073ffb7e72d3f4b238e3512fd3bed0a1b01e2935c2e2c54142ea75cc9735

General

Target
tmpqd1qopk1.exe
Size 45KB
Sample260522-yxe12set8r
SHA256 9706073ffb7e72d3f4b238e3512fd3bed0a1b01e2935c2e2c54142ea75cc9735
MD5 4be78b4ffa3380360c1d8e68f2985d94
SHA1 a9bffbf2755e78acde7dae232267095a0e4daf2b
SHA512 c0ba8bffbfcd373d382cf81bd8d820e6ea1efb2eeab34a2dc74f66d3f86a14287d21739344ba6300f1384de95505737a750e63e4cabd5294939887b95023c869
SSDEEP 768:puNA/9T85LafWUzvSdmo2qIhRzMwnOPIZzjbogX3ikNaNG5CRAsg2xEqBDZ7x:puNA/9T8p72DA+3Z3b/XScuNms7xXd7x
TLSH
T1EC232A0037E9812BF2BE5B78A8F26145467AF2673603D68E1CC451DB5A23FC686427FD
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

gaisexmup.net:443
gaisexmup.net:80
gaisexmup.net:7797
gaisexmup.net:8707
gaisexmup.net:6620
www.gaisexmup.net:443
www.gaisexmup.net:80
www.gaisexmup.net:7797
www.gaisexmup.net:8707
www.gaisexmup.net:6620
gozi.gaisexmup.net:443
gozi.gaisexmup.net:80
gozi.gaisexmup.net:7797
gozi.gaisexmup.net:8707
gozi.gaisexmup.net:6620
ursnif.gaisexmup.net:443
ursnif.gaisexmup.net:80
ursnif.gaisexmup.net:7797
ursnif.gaisexmup.net:8707
ursnif.gaisexmup.net:6620

Mutex

cmS3ym5xZ8r1

Attributes

delay
0
install
true
install_file
kiqatf.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
behavioral2/files/0x0009000000024355-8.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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	tmpqd1qopk1.exe

Executes dropped EXE 2 IoCs

pid	Process
1924	kiqatf.exe
4152	kiqatf.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	kiqatf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpqd1qopk1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kiqatf.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4756	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
760	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe
3712	tmpqd1qopk1.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3712	tmpqd1qopk1.exe
Token: SeDebugPrivilege	1924	kiqatf.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3712 wrote to memory of 4808	3712	tmpqd1qopk1.exe	89
PID 3712 wrote to memory of 1188	3712	tmpqd1qopk1.exe	91
PID 1188 wrote to memory of 4756	1188	cmd.exe	93
PID 4808 wrote to memory of 760	4808	cmd.exe	94
PID 1188 wrote to memory of 4152	1188	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\tmpqd1qopk1.exe
"C:\Users\Admin\AppData\Local\Temp\tmpqd1qopk1.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "kiqatf" /tr '"C:\Users\Admin\AppData\Roaming\kiqatf.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4808
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "kiqatf" /tr '"C:\Users\Admin\AppData\Roaming\kiqatf.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:760
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5F2.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4756
- - C:\Users\Admin\AppData\Roaming\kiqatf.exe
    "C:\Users\Admin\AppData\Roaming\kiqatf.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4152

C:\Users\Admin\AppData\Roaming\kiqatf.exe
"C:\Users\Admin\AppData\Roaming\kiqatf.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1924

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

tmp5F2.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5F2.tmp.bat
Size 149B
SHA256 e40a4074b4c23cb4b460af832d726049dab5b0b1beb34747f5e3c4a97de05805
MD5 1e9b06cfffce7015d6133063b5334566
SHA1 1d8b3d1d4d30e3045966e76de317e43b0a3024ba
SHA512 101e43b3c2f46b576df0a4427fb04738779a7673f792817700819608c1b9f5e782dd0881455409cd594bcb0c269e5ddc3811ff5ef070ce820b060f7f5b0d0df1
TLSH
T1EAC02BC291C5EA0F2C05242316FAD9DDA17B7E2A3F40FB00C304400E1780488F4D93C1
MD5 SHA1 SHA512 TLSH

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kiqatf.exe

Path C:\Users\Admin\AppData\Roaming\kiqatf.exe
Size 45KB
SHA256 9706073ffb7e72d3f4b238e3512fd3bed0a1b01e2935c2e2c54142ea75cc9735
MD5 4be78b4ffa3380360c1d8e68f2985d94
SHA1 a9bffbf2755e78acde7dae232267095a0e4daf2b
SHA512 c0ba8bffbfcd373d382cf81bd8d820e6ea1efb2eeab34a2dc74f66d3f86a14287d21739344ba6300f1384de95505737a750e63e4cabd5294939887b95023c869
SSDEEP 768:puNA/9T85LafWUzvSdmo2qIhRzMwnOPIZzjbogX3ikNaNG5CRAsg2xEqBDZ7x:puNA/9T8p72DA+3Z3b/XScuNms7xXd7x
TLSH
T1EC232A0037E9812BF2BE5B78A8F26145467AF2673603D68E1CC451DB5A23FC686427FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1924-10-0x0000000004D70000-0x0000000004D80000-memory.dmp

Download

memory/1924-13-0x0000000004D70000-0x0000000004D80000-memory.dmp

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memory/3712-0-0x0000000000530000-0x0000000000542000-memory.dmp

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memory/3712-1-0x0000000005030000-0x0000000005040000-memory.dmp

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memory/3712-2-0x0000000004F50000-0x0000000004FEC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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