b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb

General

Target

b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe
Size

71KB
MD5

adef476fa246f871a14f21fc29e687eb
SHA1

1bc0d1bc44531e90f014f44b9f4a838f73c5bd9d
SHA256

b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb
SHA512

338a1f11f6c2be573c9c607f98a91dcc58ed51f924706f07048b0da4383c2850fbc5778849148b67ff0fe42bba727db05fa934bf8ca6c8171f99e99b5b8c3297
SSDEEP

768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1S:qG14P477AxUYrZGoC09k0SkTRHhWqP

Score

9^/10

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 3 IoCs

resource	yara_rule
behavioral1/memory/2692-17-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2692-19-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/2692-20-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 4 IoCs

flow	pid	Process
5	2692	rundll32.exe
6	2692	rundll32.exe
8	2692	rundll32.exe
10	2692	rundll32.exe

Deletes itself 1 IoCs

pid	Process
2616	fsajxpwz.exe

Executes dropped EXE 1 IoCs

pid	Process
2616	fsajxpwz.exe

Loads dropped DLL 4 IoCs

pid	Process
2692	rundll32.exe
2692	rundll32.exe
2692	rundll32.exe
2692	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-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\lruxqo\\kqasc.dll\",init"	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)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\y:	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
2000	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2692	rundll32.exe
2692	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2692	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2232	b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe
2616	fsajxpwz.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2084	2232	b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe	28
PID 2232 wrote to memory of 2084	2232	b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe	28
PID 2232 wrote to memory of 2084	2232	b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe	28
PID 2232 wrote to memory of 2084	2232	b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe	28
PID 2084 wrote to memory of 2000	2084	cmd.exe	30
PID 2084 wrote to memory of 2000	2084	cmd.exe	30
PID 2084 wrote to memory of 2000	2084	cmd.exe	30
PID 2084 wrote to memory of 2000	2084	cmd.exe	30
PID 2084 wrote to memory of 2616	2084	cmd.exe	31
PID 2084 wrote to memory of 2616	2084	cmd.exe	31
PID 2084 wrote to memory of 2616	2084	cmd.exe	31
PID 2084 wrote to memory of 2616	2084	cmd.exe	31
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32
PID 2616 wrote to memory of 2692	2616	fsajxpwz.exe	32

C:\Users\Admin\AppData\Local\Temp\b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe
"C:\Users\Admin\AppData\Local\Temp\b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\fsajxpwz.exe "C:\Users\Admin\AppData\Local\Temp\b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:2000
- - \??\c:\fsajxpwz.exe
    c:\fsajxpwz.exe "C:\Users\Admin\AppData\Local\Temp\b86355573343883e717ef57a4170633227019476ffadc58f5b51c8533c2ea7bb.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2616
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\lruxqo\kqasc.dll",init c:\fsajxpwz.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:2692

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:\fsajxpwz.exe

Filesize
71KB

MD5
eeac5604a30437232867203bcba59cd8

SHA1
27d581d2da7d44886ae5e19722095154ae4b8c6a

SHA256
5888338d80960f8442c4cab8ba665c32f725af8b1c02840e05e6123cdc3b01e3

SHA512
da3ad4d3e21e2d338337ce364de669ed224bbe6d3c34cc173f008bf246a9a41a9ec8fc1f9a9bd682513d243609e33e95fd8ddbf8477ff5f6e57ddc26eca641fb

Download Submit
\??\c:\lruxqo\kqasc.dll

Filesize
42KB

MD5
36e3fb5964d663272cf1169e1e1ca478

SHA1
58115e08b49505bcbbb5c88a28a86222ba18d5d4

SHA256
c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

SHA512
daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

Download Submit
memory/2084-7-0x00000000001C0000-0x00000000001E5000-memory.dmp

Filesize
148KB

Download
memory/2084-6-0x00000000001C0000-0x00000000001E5000-memory.dmp

Filesize
148KB

Download
memory/2232-1-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/2232-3-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2232-0-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2616-8-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/2616-10-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2692-16-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2692-17-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2692-19-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/2692-18-0x0000000010021000-0x0000000010022000-memory.dmp

Filesize
4KB

Download
memory/2692-20-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads