arrowrat | 151e25188fd745e3018605af4df7da77bc6cb5bd105978e667a371662646a288

Analysis

max time kernel
129s
max time network
126s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
12-11-2023 20:30

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General

Target

Client.exe
Size

158KB
MD5

fbe2de3a8f343b1e923a8f5176f1fcf3
SHA1

9bf0f79d9110d7580be60da0d574863411074c92
SHA256

151e25188fd745e3018605af4df7da77bc6cb5bd105978e667a371662646a288
SHA512

225727fc2b982494b7644a1301367aa17be10c2f1c696df200bc8543805fbf44e2a3a266fc961917fc963fce43d9c7bee6b72d3d89c5565c770e30bcfa2839d7
SSDEEP

3072:TbzGH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfP6OO8Y:TbzGe0ODhTEPgnjuIJzo+PPcfP6B8

Score

10^/10

arrowrat client persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

147.185.221.16:40164

Mutex

RnmYPKijw

Signatures

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

Modifies Installed Components in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Modifies registry class 5 IoCs

Processes:

explorer.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3618187007-3650799920-3290345941-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

Client.exe

pid	Process
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe
2088	Client.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

Processes:

Client.exeexplorer.exe

description	pid	Process
Token: SeDebugPrivilege	2088	Client.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe
Token: SeShutdownPrivilege	2200	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

Processes:

explorer.exe

pid	Process
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe

Suspicious use of SendNotifyMessage 17 IoCs

Processes:

explorer.exe

pid	Process
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe
2200	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2088	Client.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

Client.exeexplorer.exe

description	pid	Process	procid_target
PID 2088 wrote to memory of 2200	2088	Client.exe	28
PID 2088 wrote to memory of 2200	2088	Client.exe	28
PID 2088 wrote to memory of 2200	2088	Client.exe	28
PID 2200 wrote to memory of 3032	2200	explorer.exe	30
PID 2200 wrote to memory of 3032	2200	explorer.exe	30
PID 2200 wrote to memory of 3032	2200	explorer.exe	30
PID 2088 wrote to memory of 2216	2088	Client.exe	29
PID 2088 wrote to memory of 2216	2088	Client.exe	29
PID 2088 wrote to memory of 2216	2088	Client.exe	29
PID 2088 wrote to memory of 2216	2088	Client.exe	29
PID 2088 wrote to memory of 2636	2088	Client.exe	31
PID 2088 wrote to memory of 2636	2088	Client.exe	31
PID 2088 wrote to memory of 2636	2088	Client.exe	31
PID 2088 wrote to memory of 2636	2088	Client.exe	31
PID 2088 wrote to memory of 2696	2088	Client.exe	32
PID 2088 wrote to memory of 2696	2088	Client.exe	32
PID 2088 wrote to memory of 2696	2088	Client.exe	32
PID 2088 wrote to memory of 2696	2088	Client.exe	32
PID 2088 wrote to memory of 2700	2088	Client.exe	35
PID 2088 wrote to memory of 2700	2088	Client.exe	35
PID 2088 wrote to memory of 2700	2088	Client.exe	35
PID 2088 wrote to memory of 2700	2088	Client.exe	35
PID 2088 wrote to memory of 2720	2088	Client.exe	33
PID 2088 wrote to memory of 2720	2088	Client.exe	33
PID 2088 wrote to memory of 2720	2088	Client.exe	33
PID 2088 wrote to memory of 2720	2088	Client.exe	33
PID 2088 wrote to memory of 2612	2088	Client.exe	34
PID 2088 wrote to memory of 2612	2088	Client.exe	34
PID 2088 wrote to memory of 2612	2088	Client.exe	34
PID 2088 wrote to memory of 2612	2088	Client.exe	34
PID 2088 wrote to memory of 1084	2088	Client.exe	36
PID 2088 wrote to memory of 1084	2088	Client.exe	36
PID 2088 wrote to memory of 1084	2088	Client.exe	36
PID 2088 wrote to memory of 1084	2088	Client.exe	36
PID 2088 wrote to memory of 2728	2088	Client.exe	37
PID 2088 wrote to memory of 2728	2088	Client.exe	37
PID 2088 wrote to memory of 2728	2088	Client.exe	37
PID 2088 wrote to memory of 2728	2088	Client.exe	37
PID 2088 wrote to memory of 2732	2088	Client.exe	39
PID 2088 wrote to memory of 2732	2088	Client.exe	39
PID 2088 wrote to memory of 2732	2088	Client.exe	39
PID 2088 wrote to memory of 2732	2088	Client.exe	39
PID 2088 wrote to memory of 2496	2088	Client.exe	38
PID 2088 wrote to memory of 2496	2088	Client.exe	38
PID 2088 wrote to memory of 2496	2088	Client.exe	38
PID 2088 wrote to memory of 2496	2088	Client.exe	38

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\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe"
  2⤵
  - Modifies Installed Components in the registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:3032
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2216
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2636
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2696
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2720
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2612
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2700
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:1084
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2728
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2496
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 147.185.221.16 40164 RnmYPKijw
  2⤵
  PID:2732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2088-0-0x0000000000AF0000-0x0000000000B1E000-memory.dmp

Filesize
184KB

Download
memory/2088-1-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-2-0x000000001AE20000-0x000000001AEA0000-memory.dmp

Filesize
512KB

Download
memory/2088-4-0x000007FEF5800000-0x000007FEF61EC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-5-0x000000001AE20000-0x000000001AEA0000-memory.dmp

Filesize
512KB

Download
memory/2200-3-0x0000000003FE0000-0x0000000003FE1000-memory.dmp

Filesize
4KB

Download
memory/2200-6-0x0000000003FE0000-0x0000000003FE1000-memory.dmp

Filesize
4KB

Download
memory/2200-10-0x0000000003BE0000-0x0000000003BF0000-memory.dmp

Filesize
64KB

Download