arrowrat | bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a

General

Target

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe
Size

90KB
MD5

ffcc9b9d4ef1f533d2de35bc1e783e7f
SHA1

e102a7c7586f16f93caeac089f3be247a95ff7a1
SHA256

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a
SHA512

0fa343e6fffda0789e8ce6bdaf5dd2cb84d0cdeee190546d0b51aa09a20d3f8aa50be049efec4d9269bdf6ee5af863ace66850a8844d03d1a6e9ac89971c2159
SSDEEP

1536:ebRiQMT57SK3bUzZdQ1iIMvnZlbLxjV3AGq5gWlocT1wzySsd9NJ33c:ebRU57SKsstcnZTJQDgWPaySsdH5s

Score

10^/10

arrowrat arrowrat discovery persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

ArrowRAT

C2

arwr.duckdns.org:5558

Mutex

wSUudxZaw.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

Processes:

explorer.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe

description	pid	Process	procid_target
PID 1812 set thread context of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32

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

Processes:

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.execvtres.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe

Modifies registry class 5 IoCs

Processes:

explorer.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe

pid	Process
1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exeexplorer.exe

description	pid	Process
Token: SeDebugPrivilege	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe
Token: SeShutdownPrivilege	2368	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

Processes:

explorer.exe

pid	Process
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe

Suspicious use of SendNotifyMessage 17 IoCs

Processes:

explorer.exe

pid	Process
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe
2368	explorer.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exeexplorer.exe

description	pid	Process	procid_target
PID 1812 wrote to memory of 2368	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	31
PID 1812 wrote to memory of 2368	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	31
PID 1812 wrote to memory of 2368	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	31
PID 1812 wrote to memory of 2368	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	31
PID 2368 wrote to memory of 1148	2368	explorer.exe	33
PID 2368 wrote to memory of 1148	2368	explorer.exe	33
PID 2368 wrote to memory of 1148	2368	explorer.exe	33
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32
PID 1812 wrote to memory of 1720	1812	bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe	32

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\bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe
"C:\Users\Admin\AppData\Local\Temp\bb3cfbb29265e73f8ed5a345274347f7e349435dfd7e2806f05fa90cecc20b5a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812
- 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:2368
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:1148
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" ArrowRAT arwr.duckdns.org 5558 wSUudxZaw.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1720

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/1720-11-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1720-10-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1720-8-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1720-6-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1720-4-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1720-2-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1720-12-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1720-13-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1812-0-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/1812-1-0x0000000000290000-0x00000000002AC000-memory.dmp

Filesize
112KB

Download
memory/2368-17-0x0000000003D50000-0x0000000003D60000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads