asyncrat | 1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81

General

Target
1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
Size 45KB
Sample260718-k7njaaas21
SHA256 1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81
MD5 216581a35ead923f65043b2861d4b240
SHA1 5a64509ddba25f709b246176ef43aaeab99a81ac
SHA512 9443dff9e842056bee1b318a9b600864ed907835c0fa61f6478652fe40b9265f3c7726660b5f9363623a81a94b84d06280ff7cc7090febcbccfd4b7f16cb7f9a
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1w0b3NLAteiZPImzjbZgW3iVxLDL1u2BDZUx:cuR0JTPjY2a3ZhiWm3b2WSV9kYdUx
TLSH
T144232A003BE8812BF2BE4F7899F26145867AF6633603D6491CC452DB5713BC69A43AFD
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

sexnga.store:80
sexnga.store:22
sexnga.store:8080
sexnga.store:8880
sexnga.store:2052
sexnga.store:2082
sexnga.store:2086
sexnga.store:2095
sexnga.store:443
sexnga.store:2053
sexnga.store:2083
sexnga.store:2087
sexnga.store:2096
sexnga.store:8443
www.sexnga.store:80
www.sexnga.store:22
www.sexnga.store:8080
www.sexnga.store:8880
www.sexnga.store:2052
www.sexnga.store:2082
www.sexnga.store:2086
www.sexnga.store:2095
www.sexnga.store:443
www.sexnga.store:2053
www.sexnga.store:2083
www.sexnga.store:2087
www.sexnga.store:2096
www.sexnga.store:8443
gozi.sexnga.store:80
gozi.sexnga.store:22
gozi.sexnga.store:8080
gozi.sexnga.store:8880
gozi.sexnga.store:2052
gozi.sexnga.store:2082
gozi.sexnga.store:2086
gozi.sexnga.store:2095
gozi.sexnga.store:443
gozi.sexnga.store:2053
gozi.sexnga.store:2083
gozi.sexnga.store:2087
gozi.sexnga.store:2096
gozi.sexnga.store:8443
hacker.sexnga.store:80
hacker.sexnga.store:22
hacker.sexnga.store:8080
hacker.sexnga.store:8880
hacker.sexnga.store:2052
hacker.sexnga.store:2082
hacker.sexnga.store:2086
hacker.sexnga.store:2095
hacker.sexnga.store:443
hacker.sexnga.store:2053
hacker.sexnga.store:2083
hacker.sexnga.store:2087
hacker.sexnga.store:2096
hacker.sexnga.store:8443
downadup.sexnga.store:80
downadup.sexnga.store:22
downadup.sexnga.store:8080
downadup.sexnga.store:8880
downadup.sexnga.store:2052
downadup.sexnga.store:2082
downadup.sexnga.store:2086
downadup.sexnga.store:2095
downadup.sexnga.store:443
downadup.sexnga.store:2053
downadup.sexnga.store:2083
downadup.sexnga.store:2087
downadup.sexnga.store:2096
downadup.sexnga.store:8443

Mutex

qvvHPbVdarFC

Attributes

delay
0
install
true
install_file
pn5l.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 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x000400000001dbd8-8.dat	family_asyncrat
behavioral1/memory/4316-10-0x00000000048D0000-0x00000000048E0000-memory.dmp	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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe

Executes dropped EXE 2 IoCs

pid	Process
4316	pn5l.exe
3220	pn5l.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
1076	cmd.exe
4236	cmd.exe

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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pn5l.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pn5l.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4872	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
3692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
Token: SeDebugPrivilege	4316	pn5l.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 896 wrote to memory of 1076	896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe	84
PID 896 wrote to memory of 4236	896	1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe	86
PID 4236 wrote to memory of 4872	4236	cmd.exe	88
PID 1076 wrote to memory of 3692	1076	cmd.exe	89
PID 4236 wrote to memory of 3220	4236	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe
"C:\Users\Admin\AppData\Local\Temp\1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:896
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "pn5l" /tr '"C:\Users\Admin\AppData\Roaming\pn5l.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1076
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "pn5l" /tr '"C:\Users\Admin\AppData\Roaming\pn5l.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3692
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4A81.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4236
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4872
- - C:\Users\Admin\AppData\Roaming\pn5l.exe
    "C:\Users\Admin\AppData\Roaming\pn5l.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3220

C:\Users\Admin\AppData\Roaming\pn5l.exe
"C:\Users\Admin\AppData\Roaming\pn5l.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4316

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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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tmp4A81.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp4A81.tmp.bat
Size 148B
SHA256 b2cee16bf75d78bb2d468978c344d0f62b879b6e49c930da09671957ae16d861
MD5 b87149fc51c9f1e3303deda880da792c
SHA1 3646c1a40f95236fcc779503894bd1c84e767277
SHA512 959f686782469a7b15e16dddc3f25b2e38a4ca08d6309c8f381429bdf889fffb7d0dc7b641762122bafbe18b9ebc4068211eac2061d2e012321edfc29dc52d02
TLSH
T197C02B6251CAEE6F2C05349312FFE48D9176AC5D3F40BF00C30444CD2280458F0DA343
MD5 SHA1 SHA512 TLSH

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pn5l.exe

Path C:\Users\Admin\AppData\Roaming\pn5l.exe
Size 45KB
SHA256 1d3d4c9c6023dc7246433abb172b9d5ffdbb3f11c09fa1a8caea3b3a51910a81
MD5 216581a35ead923f65043b2861d4b240
SHA1 5a64509ddba25f709b246176ef43aaeab99a81ac
SHA512 9443dff9e842056bee1b318a9b600864ed907835c0fa61f6478652fe40b9265f3c7726660b5f9363623a81a94b84d06280ff7cc7090febcbccfd4b7f16cb7f9a
SSDEEP 768:cuR0JTPUYkEWUmjWymo2q1w0b3NLAteiZPImzjbZgW3iVxLDL1u2BDZUx:cuR0JTPjY2a3ZhiWm3b2WSV9kYdUx
TLSH
T144232A003BE8812BF2BE4F7899F26145867AF6633603D6491CC452DB5713BC69A43AFD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/896-0-0x0000000000590000-0x00000000005A2000-memory.dmp

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memory/896-1-0x0000000004DF0000-0x0000000004E00000-memory.dmp

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memory/896-2-0x0000000004EA0000-0x0000000004F3C000-memory.dmp

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memory/4316-10-0x00000000048D0000-0x00000000048E0000-memory.dmp

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memory/4316-13-0x00000000048D0000-0x00000000048E0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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