f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec

General

Target

f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe
Size

89KB
MD5

8f59041eddb5e8f1c676ca4da5393c9d
SHA1

554bd197102def5065b1f4dd179c4a0e9746305e
SHA256

f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec
SHA512

c1b38b63b7ec6e3dee5d94ba8295ed7c9232384dfff5c98a8492e0d705ff5c460f14ac29a83a29ca8ccee1b635ed0760fc8035a261256ec315d4764be3edc6bb
SSDEEP

1536:1MIPgEm56wnbkKC2ZyBJU066lwLCRVEB+nR/y8cmNrEIviCOzuajkrDl9HNSjA:11PgEOng1d66jRVa+n4NmNNouukrD7Hv

Score

9^/10

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral2/memory/1652-14-0x0000000010000000-0x0000000010022000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1652-16-0x0000000010000000-0x0000000010022000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1652-18-0x0000000010000000-0x0000000010022000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 7 IoCs

resource	yara_rule
behavioral2/memory/752-7-0x0000000000400000-0x0000000000428000-memory.dmp	UPX
behavioral2/memory/752-10-0x0000000000400000-0x0000000000428000-memory.dmp	UPX
behavioral2/files/0x000b000000023370-11.dat	UPX
behavioral2/memory/1652-13-0x0000000010000000-0x0000000010022000-memory.dmp	UPX
behavioral2/memory/1652-14-0x0000000010000000-0x0000000010022000-memory.dmp	UPX
behavioral2/memory/1652-16-0x0000000010000000-0x0000000010022000-memory.dmp	UPX
behavioral2/memory/1652-18-0x0000000010000000-0x0000000010022000-memory.dmp	UPX

Blocklisted process makes network request 9 IoCs

flow	pid	Process
14	1652	rundll32.exe
20	1652	rundll32.exe
21	1652	rundll32.exe
22	1652	rundll32.exe
33	1652	rundll32.exe
34	1652	rundll32.exe
38	1652	rundll32.exe
43	1652	rundll32.exe
44	1652	rundll32.exe

Deletes itself 1 IoCs

pid	Process
752	ykswbkfam.exe

Executes dropped EXE 1 IoCs

pid	Process
752	ykswbkfam.exe

Loads dropped DLL 1 IoCs

pid	Process
1652	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

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000b000000023370-11.dat	upx
behavioral2/memory/1652-13-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral2/memory/1652-14-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral2/memory/1652-16-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral2/memory/1652-18-0x0000000010000000-0x0000000010022000-memory.dmp	upx

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-1-5-21-711569230-3659488422-571408806-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\qeesw\\dlthy.lhd\",crc32"	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)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	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

Kills process with taskkill 1 IoCs

evasion

pid	Process
3104	taskkill.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1700	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1652	rundll32.exe
1652	rundll32.exe
1652	rundll32.exe
1652	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	rundll32.exe
Token: SeDebugPrivilege	3104	taskkill.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1076	f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe
752	ykswbkfam.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1076 wrote to memory of 2792	1076	f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe	83
PID 1076 wrote to memory of 2792	1076	f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe	83
PID 1076 wrote to memory of 2792	1076	f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe	83
PID 2792 wrote to memory of 1700	2792	cmd.exe	85
PID 2792 wrote to memory of 1700	2792	cmd.exe	85
PID 2792 wrote to memory of 1700	2792	cmd.exe	85
PID 2792 wrote to memory of 752	2792	cmd.exe	87
PID 2792 wrote to memory of 752	2792	cmd.exe	87
PID 2792 wrote to memory of 752	2792	cmd.exe	87
PID 752 wrote to memory of 1652	752	ykswbkfam.exe	88
PID 752 wrote to memory of 1652	752	ykswbkfam.exe	88
PID 752 wrote to memory of 1652	752	ykswbkfam.exe	88
PID 1652 wrote to memory of 3104	1652	rundll32.exe	89
PID 1652 wrote to memory of 3104	1652	rundll32.exe	89
PID 1652 wrote to memory of 3104	1652	rundll32.exe	89

C:\Users\Admin\AppData\Local\Temp\f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe
"C:\Users\Admin\AppData\Local\Temp\f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1076
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\ykswbkfam.exe "C:\Users\Admin\AppData\Local\Temp\f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:1700
- - C:\Users\Admin\AppData\Local\Temp\ykswbkfam.exe
    C:\Users\Admin\AppData\Local\Temp\\ykswbkfam.exe "C:\Users\Admin\AppData\Local\Temp\f2e10e8fabb22ee9e3e7c28ebd20e61ad490428dbbf8c9028b9f48f395d2e5ec.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:752
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\qeesw\dlthy.lhd",crc32 C:\Users\Admin\AppData\Local\Temp\ykswbkfam.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
      Suspicious use of WriteProcessMemory
      PID:1652
    - - \??\c:\windows\SysWOW64\taskkill.exe
        
        taskkill /f /im attrib.exe
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3104

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\ykswbkfam.exe

Filesize
89KB

MD5
20f6522c7f3e70574674072327fd8c6b

SHA1
099822f764e78241022e1e45e8d7a51ba4f2d56e

SHA256
8224b4025da91a2bf4f4fa8f18973b2354e73b12949acf16afe13a0c16860143

SHA512
2abd4857589f73bcf60019321d31d44c1cf496908776b6464f2d74d80c18ed9a6111bd7f5692d750746edc0aa421e4ba6eed58e9bced3be9280f33896ba9cb35

Download Submit
\??\c:\qeesw\dlthy.lhd

Filesize
57KB

MD5
2f53f49e01f09d6e6064871eec1955cd

SHA1
a6e1a6e5c2080d0fb2f7a872e3902a8a4a1a9b5f

SHA256
964e4dd2532d540bb61d3c7ccc833f2358d8cd6b2eabc3a2d51183a18b59f82d

SHA512
2cb98030c3df7417c04f796f78f23f96d381871d9c7ae4a14116764e915b2e2f56b9b3a6fb76fedc50a17788de9538fc7954a7b73bf17e4be43e1fc1a06bc218

Download Submit
memory/752-7-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/752-8-0x00000000006F0000-0x0000000000722000-memory.dmp

Filesize
200KB

Download
memory/752-10-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1076-1-0x00000000006F0000-0x00000000006F1000-memory.dmp

Filesize
4KB

Download
memory/1076-0-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1076-3-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1652-13-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/1652-14-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/1652-16-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download
memory/1652-18-0x0000000010000000-0x0000000010022000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads