arrowrat | 6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8ae

General

Target

6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe
Size

90KB
MD5

1be917436f2b88f6b47de91fc0d10920
SHA1

9c986ab8a360357a9ef2ef787f9521e9d6f06a8d
SHA256

6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8ae
SHA512

fffd8437176354215b6642dbf21e8a32a816ab6bd312a96eeae1e1f91edf2b61904d7750a27c9df44b3d5289e63d613530eaaa1d04d16bc94eae28331c9f7fc1
SSDEEP

1536:ebRiQMb57SK3bUzZdQ1iIMvnZlbLxjV3AGq5gWlocT1wzySsd9NJ33J:ebR057SKsstcnZTJQDgWPaySsdH5Z

Score

10^/10

arrowrat arrowrat discovery persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

ArrowRAT

C2

hypersh.duckdns.org:5558

Mutex

DjTfbajvJ.exe

Signatures

ArrowRat
Remote access tool with various capabilities first seen in late 2021.
rat arrowrat
Arrowrat family
arrowrat

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1288 set thread context of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 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	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe
Token: SeShutdownPrivilege	2244	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

pid	Process
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe

Suspicious use of SendNotifyMessage 17 IoCs

pid	Process
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe
2244	explorer.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1288 wrote to memory of 2244	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	30
PID 1288 wrote to memory of 2244	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	30
PID 1288 wrote to memory of 2244	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	30
PID 1288 wrote to memory of 2244	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	30
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 1288 wrote to memory of 2992	1288	6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe	31
PID 2244 wrote to memory of 2272	2244	explorer.exe	33
PID 2244 wrote to memory of 2272	2244	explorer.exe	33
PID 2244 wrote to memory of 2272	2244	explorer.exe	33

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\6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe
"C:\Users\Admin\AppData\Local\Temp\6d1e9bdbe3b17d3f38b48f35501b26a9059159298c0196f0cb5a0a0de99fc8aeN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe"
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2244
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:2272
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" ArrowRAT hypersh.duckdns.org 5558 DjTfbajvJ.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2992

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1288-0-0x0000000073E9E000-0x0000000073E9F000-memory.dmp

Filesize
4KB

Download
memory/1288-1-0x0000000000D60000-0x0000000000D7C000-memory.dmp

Filesize
112KB

Download
memory/2244-18-0x0000000002A30000-0x0000000002A40000-memory.dmp

Filesize
64KB

Download
memory/2992-11-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2992-10-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2992-8-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2992-6-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2992-4-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2992-2-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2992-14-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2992-12-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads