arrowrat | 63ab8bad7e72c1c4044743b0de2efd791a4f9bf12e85b2bd973b7309d50eafc8

Analysis

max time kernel
127s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
14-01-2024 05:08

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General

Target

bSU4.exe
Size

138KB
MD5

4b1ce3fe71b14c655755251616d61766
SHA1

9941994468ad58962f5063ae0d1998790b577744
SHA256

63ab8bad7e72c1c4044743b0de2efd791a4f9bf12e85b2bd973b7309d50eafc8
SHA512

dd87f5d2bb7a4a903981de9156e6249c514b138747300ceb84bf0e230c38010a34f51df17717b73c5e9dece2524c61ffcbe4015ec0b59e85c477aeb92d9530ae
SSDEEP

3072:qbvF5mz7Bqh1v59Y08mAjs0Ltel+qOeJHlpV8b+Y/YM:qbvzS7BqjjYHdrqkL/

Score

10^/10

arrowrat sub70f persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

SUB70F

instruments-george.gl.at.ply.gg:12129

Mutex

58PJXL

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

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe
1520	bSU4.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	bSU4.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe
Token: SeShutdownPrivilege	2840	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

pid	Process
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe

Suspicious use of SendNotifyMessage 15 IoCs

pid	Process
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe
2840	explorer.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2840	1520	bSU4.exe	24
PID 1520 wrote to memory of 2840	1520	bSU4.exe	24
PID 1520 wrote to memory of 2840	1520	bSU4.exe	24
PID 2840 wrote to memory of 2692	2840	explorer.exe	26
PID 2840 wrote to memory of 2692	2840	explorer.exe	26
PID 2840 wrote to memory of 2692	2840	explorer.exe	26
PID 1520 wrote to memory of 3036	1520	bSU4.exe	25
PID 1520 wrote to memory of 3036	1520	bSU4.exe	25
PID 1520 wrote to memory of 3036	1520	bSU4.exe	25
PID 1520 wrote to memory of 3036	1520	bSU4.exe	25
PID 1520 wrote to memory of 2800	1520	bSU4.exe	36
PID 1520 wrote to memory of 2800	1520	bSU4.exe	36
PID 1520 wrote to memory of 2800	1520	bSU4.exe	36
PID 1520 wrote to memory of 2800	1520	bSU4.exe	36
PID 1520 wrote to memory of 2796	1520	bSU4.exe	35
PID 1520 wrote to memory of 2796	1520	bSU4.exe	35
PID 1520 wrote to memory of 2796	1520	bSU4.exe	35
PID 1520 wrote to memory of 2796	1520	bSU4.exe	35
PID 1520 wrote to memory of 2744	1520	bSU4.exe	34
PID 1520 wrote to memory of 2744	1520	bSU4.exe	34
PID 1520 wrote to memory of 2744	1520	bSU4.exe	34
PID 1520 wrote to memory of 2744	1520	bSU4.exe	34
PID 1520 wrote to memory of 2704	1520	bSU4.exe	33
PID 1520 wrote to memory of 2704	1520	bSU4.exe	33
PID 1520 wrote to memory of 2704	1520	bSU4.exe	33
PID 1520 wrote to memory of 2704	1520	bSU4.exe	33
PID 1520 wrote to memory of 2680	1520	bSU4.exe	32
PID 1520 wrote to memory of 2680	1520	bSU4.exe	32
PID 1520 wrote to memory of 2680	1520	bSU4.exe	32
PID 1520 wrote to memory of 2680	1520	bSU4.exe	32
PID 1520 wrote to memory of 2396	1520	bSU4.exe	31
PID 1520 wrote to memory of 2396	1520	bSU4.exe	31
PID 1520 wrote to memory of 2396	1520	bSU4.exe	31
PID 1520 wrote to memory of 2396	1520	bSU4.exe	31
PID 1520 wrote to memory of 2884	1520	bSU4.exe	30
PID 1520 wrote to memory of 2884	1520	bSU4.exe	30
PID 1520 wrote to memory of 2884	1520	bSU4.exe	30
PID 1520 wrote to memory of 2884	1520	bSU4.exe	30
PID 1520 wrote to memory of 2664	1520	bSU4.exe	29
PID 1520 wrote to memory of 2664	1520	bSU4.exe	29
PID 1520 wrote to memory of 2664	1520	bSU4.exe	29
PID 1520 wrote to memory of 2664	1520	bSU4.exe	29
PID 1520 wrote to memory of 2708	1520	bSU4.exe	28
PID 1520 wrote to memory of 2708	1520	bSU4.exe	28
PID 1520 wrote to memory of 2708	1520	bSU4.exe	28
PID 1520 wrote to memory of 2708	1520	bSU4.exe	28

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\bSU4.exe
"C:\Users\Admin\AppData\Local\Temp\bSU4.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1520
- 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:2840
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:2692
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:3036
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2708
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2884
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2396
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2680
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2704
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2744
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2796
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" SUB70F instruments-george.gl.at.ply.gg 12129 58PJXL
  2⤵
  PID:2800

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/1520-0-0x00000000001F0000-0x0000000000218000-memory.dmp

Filesize
160KB

Download
memory/1520-1-0x000007FEF54D0000-0x000007FEF5EBC000-memory.dmp

Filesize
9.9MB

Download
memory/1520-2-0x000007FEF54D0000-0x000007FEF5EBC000-memory.dmp

Filesize
9.9MB

Download
memory/2840-3-0x0000000004210000-0x0000000004211000-memory.dmp

Filesize
4KB

Download
memory/2840-4-0x0000000004210000-0x0000000004211000-memory.dmp

Filesize
4KB

Download
memory/2840-8-0x0000000002B50000-0x0000000002B60000-memory.dmp

Filesize
64KB

Download