8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256

General

Target

8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe
Size

86KB
MD5

7202600ab0929595c6fb059f6a353466
SHA1

1afc916bc125ff8c779419b6f8642f9879a85182
SHA256

8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256
SHA512

25474643e00c4607b8c1fe24c153568613308273165a83e7c8d988df5f393fee1515c24efbac86692e9c90d0f603a886afe8a0bfae827939be7838abf024e821
SSDEEP

1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmypn:uLRrO10TiJD9yjqrilyxOuPpn

Score

9^/10

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/2708-18-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2708-19-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2708-20-0x0000000010000000-0x0000000010023000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 4 IoCs

flow	pid	Process
5	2708	rundll32.exe
6	2708	rundll32.exe
8	2708	rundll32.exe
12	2708	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2620	kqasc.exe

Executes dropped EXE 1 IoCs

pid	Process
2620	kqasc.exe

Loads dropped DLL 6 IoCs

pid	Process
1248	cmd.exe
1248	cmd.exe
2708	rundll32.exe
2708	rundll32.exe
2708	rundll32.exe
2708	rundll32.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-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\ymlxt\\oktuf.dll\",QueryPluginInterface"	rundll32.exe

Enumerates connected drives 3 TTPs 23 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)	\??\o:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.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	rundll32.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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2148	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2708	rundll32.exe
2708	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2084	8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe
2620	kqasc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 1248	2084	8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe	28
PID 2084 wrote to memory of 1248	2084	8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe	28
PID 2084 wrote to memory of 1248	2084	8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe	28
PID 2084 wrote to memory of 1248	2084	8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe	28
PID 1248 wrote to memory of 2148	1248	cmd.exe	30
PID 1248 wrote to memory of 2148	1248	cmd.exe	30
PID 1248 wrote to memory of 2148	1248	cmd.exe	30
PID 1248 wrote to memory of 2148	1248	cmd.exe	30
PID 1248 wrote to memory of 2620	1248	cmd.exe	31
PID 1248 wrote to memory of 2620	1248	cmd.exe	31
PID 1248 wrote to memory of 2620	1248	cmd.exe	31
PID 1248 wrote to memory of 2620	1248	cmd.exe	31
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32
PID 2620 wrote to memory of 2708	2620	kqasc.exe	32

C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe
"C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\kqasc.exe "C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1248
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:2148
- - C:\Users\Admin\AppData\Local\Temp\kqasc.exe
    C:\Users\Admin\AppData\Local\Temp\\kqasc.exe "C:\Users\Admin\AppData\Local\Temp\8bca905961c18b34b9b567083dc243c9024c2767cf2057656b91335f09ed4256.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2620
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\ymlxt\oktuf.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\kqasc.exe
      4⤵
      Blocklisted process makes network request
      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:2708

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:\Users\Admin\AppData\Local\Temp\kqasc.exe

Filesize
86KB

MD5
ecce033571e81ea33887b23a1f646ca8

SHA1
0493f26da6ee3c4d1b92ab0e77571ae62b402aff

SHA256
4e03f0d3d4921139c7eaec04c464d18c771db3face30c32615684ffadf15070e

SHA512
7774231b4ce7af08c76fb35010eaea7a841f5d0c240fb1699bbf805ab44ebf95f855000e03240e3968615158a7309014d9177c50afcfe5d52c55fd7505157244

Download Submit
\??\c:\ymlxt\oktuf.dll

Filesize
44KB

MD5
0f12a7d509b2c9bb9b4cd6d8a0325e86

SHA1
f5fb59ad4f0633d115b06f35a2dc161dc4367157

SHA256
9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c

SHA512
e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f

Download Submit
memory/1248-8-0x0000000000120000-0x0000000000137000-memory.dmp

Filesize
92KB

Download
memory/1248-7-0x0000000000120000-0x0000000000137000-memory.dmp

Filesize
92KB

Download
memory/2084-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2084-2-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2620-10-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2708-16-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download
memory/2708-17-0x0000000010020000-0x0000000010021000-memory.dmp

Filesize
4KB

Download
memory/2708-18-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download
memory/2708-19-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download
memory/2708-20-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads