1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b

General

Target

1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe
Size

405KB
MD5

8940705a9dee5e2e6dab7279d9e44fbb
SHA1

efa9de6c5015cfd51594bea8ea15d88a1cbeb19a
SHA256

1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b
SHA512

5fdaaa9fea5d8f5f538e7a9eb13f9e4a3b1db695e05b8c2fb89f39e9b218307388d6223a8f79342936363f73dcd7048ce089472a809997df2fcbfd03d73a2522
SSDEEP

12288:vdDU6g13sJd1fm/+yb3O2jg82ydU/DdKumy:vdE3sJd1fm/+yb3OYg84/JHJ

Score

9^/10

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral2/memory/1744-12-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1744-16-0x0000000010000000-0x0000000010033000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/files/0x000c000000022f7b-2.dat	UPX
behavioral2/files/0x0008000000023254-8.dat	UPX
behavioral2/memory/1744-11-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/1744-12-0x0000000010000000-0x0000000010033000-memory.dmp	UPX
behavioral2/memory/1744-16-0x0000000010000000-0x0000000010033000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
2096	ueluo.exe

Executes dropped EXE 2 IoCs

pid	Process
2096	ueluo.exe
1744	xik.exe

Loads dropped DLL 1 IoCs

pid	Process
1744	xik.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VIEW = "c:\\Program Files\\avrby\\xik.exe \"c:\\Program Files\\avrby\\xikct.dll\",Viewer"	xik.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\b:	xik.exe
File opened (read-only)	\??\a:	xik.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	xik.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\avrby	ueluo.exe
File created	\??\c:\Program Files\avrby\xikct.dll	ueluo.exe
File created	\??\c:\Program Files\avrby\xik.exe	ueluo.exe
File opened for modification	\??\c:\Program Files\avrby\xik.exe	ueluo.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	xik.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	xik.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4688	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1744	xik.exe
1744	xik.exe
1744	xik.exe
1744	xik.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1744	xik.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3708	1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe
2096	ueluo.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 1408	3708	1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe	90
PID 3708 wrote to memory of 1408	3708	1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe	90
PID 3708 wrote to memory of 1408	3708	1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe	90
PID 1408 wrote to memory of 4688	1408	cmd.exe	92
PID 1408 wrote to memory of 4688	1408	cmd.exe	92
PID 1408 wrote to memory of 4688	1408	cmd.exe	92
PID 1408 wrote to memory of 2096	1408	cmd.exe	93
PID 1408 wrote to memory of 2096	1408	cmd.exe	93
PID 1408 wrote to memory of 2096	1408	cmd.exe	93
PID 2096 wrote to memory of 1744	2096	ueluo.exe	94
PID 2096 wrote to memory of 1744	2096	ueluo.exe	94
PID 2096 wrote to memory of 1744	2096	ueluo.exe	94

C:\Users\Admin\AppData\Local\Temp\1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe
"C:\Users\Admin\AppData\Local\Temp\1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ueluo.exe "C:\Users\Admin\AppData\Local\Temp\1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1408
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:4688
- - C:\Users\Admin\AppData\Local\Temp\ueluo.exe
    C:\Users\Admin\AppData\Local\Temp\\ueluo.exe "C:\Users\Admin\AppData\Local\Temp\1f33e14b054b821e5ffe0ae8377d096cad493a3087f4fea0b5f30eac7a46180b.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2096
  - - \??\c:\Program Files\avrby\xik.exe
      "c:\Program Files\avrby\xik.exe" "c:\Program Files\avrby\xikct.dll",Viewer C:\Users\Admin\AppData\Local\Temp\ueluo.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1744

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:5100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\avrby\xik.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Users\Admin\AppData\Local\Temp\ueluo.exe

Filesize
406KB

MD5
911cd4df50a3bcfd3f5c2e804d74a68a

SHA1
db959ef254bec71562d12f1702112e4a5534b941

SHA256
5747395e25a22a2f1d441910d17afd12b152848adb2d2fa1da3ee72d47d5f1c8

SHA512
cf8f4664656a64f57c046ab5455d370b9da83406fe5a0f034df65eb4b2e26147aa479d04c2107c35aa7e903c32eb7b77fe7b02f40bc276a7c664026d8f604562

Download Submit
\??\c:\Program Files\avrby\xikct.dll

Filesize
89KB

MD5
6e5ec505533ac5b9e92ab61c4ed8aecb

SHA1
257c19b19c4b1611bf3f388617bd594e5542fafa

SHA256
90485af8606b9a7894db94f385efcbba42518ef5ca79c1feb42aa675f1a5a7ba

SHA512
506f7d21971959c6dc2e9404fc68daf8b8e9484c1de15f0a704cff4dac08d968e85c974d07d8cdf0696881a93cc078facbcb1100d81e03677e6985bfd3f18080

Download Submit
memory/1744-11-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/1744-12-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download
memory/1744-16-0x0000000010000000-0x0000000010033000-memory.dmp

Filesize
204KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads