e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25

Analysis

max time kernel
119s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16/10/2024, 22:25

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General

Target
e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe
Size 93KB
Sample241016-2b89jszdmm
SHA256 e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25
MD5 cee1433a4a69a9e53652636ccbd49b90
SHA1 702234b757e139fa57474aba42bb355a7bdf7a1e
SHA512 faae51f15c6a0b095bf1c6bd4fb40d4315723c9e0d9c749b71f15e39a715ae0d4d40d7e3659c2e3b2c2d9cf608b6d4a85c3afec153a943409857cbd90fb3d871
SSDEEP 1536:1MIPgEm56wnbkKC2ZyBJU066lwLCRVEB+nR/y8cmNrEIviCOzuajkrDl9HNSj:11PgEOng1d66jRVa+n4NmNNouukrD7HI
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit discovery persistence spyware stealer upx

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
17	3068	rundll32.exe
32	3068	rundll32.exe
33	3068	rundll32.exe
34	3068	rundll32.exe
50	3068	rundll32.exe
51	3068	rundll32.exe
60	3068	rundll32.exe
75	3068	rundll32.exe

Deletes itself 1 IoCs

pid	Process
3156	gjdtv.exe

Executes dropped EXE 1 IoCs

pid	Process
3156	gjdtv.exe

Loads dropped DLL 1 IoCs

pid	Process
3068	rundll32.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\aecih\\rtbsq.tsr\",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)	\??\m:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	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

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0008000000023cae-10.dat	upx
behavioral2/memory/3068-12-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral2/memory/3068-13-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral2/memory/3068-15-0x0000000010000000-0x0000000010022000-memory.dmp	upx
behavioral2/memory/3068-17-0x0000000010000000-0x0000000010022000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gjdtv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3888	cmd.exe
3992	PING.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
2772	taskkill.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3992	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3068	rundll32.exe
3068	rundll32.exe
3068	rundll32.exe
3068	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	rundll32.exe
Token: SeDebugPrivilege	2772	taskkill.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1448	e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe
3156	gjdtv.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 3888	1448	e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe	85
PID 1448 wrote to memory of 3888	1448	e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe	85
PID 1448 wrote to memory of 3888	1448	e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe	85
PID 3888 wrote to memory of 3992	3888	cmd.exe	88
PID 3888 wrote to memory of 3992	3888	cmd.exe	88
PID 3888 wrote to memory of 3992	3888	cmd.exe	88
PID 3888 wrote to memory of 3156	3888	cmd.exe	90
PID 3888 wrote to memory of 3156	3888	cmd.exe	90
PID 3888 wrote to memory of 3156	3888	cmd.exe	90
PID 3156 wrote to memory of 3068	3156	gjdtv.exe	91
PID 3156 wrote to memory of 3068	3156	gjdtv.exe	91
PID 3156 wrote to memory of 3068	3156	gjdtv.exe	91
PID 3068 wrote to memory of 2772	3068	rundll32.exe	92
PID 3068 wrote to memory of 2772	3068	rundll32.exe	92
PID 3068 wrote to memory of 2772	3068	rundll32.exe	92

C:\Users\Admin\AppData\Local\Temp\e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe
"C:\Users\Admin\AppData\Local\Temp\e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\gjdtv.exe "C:\Users\Admin\AppData\Local\Temp\e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3888
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3992
- - C:\Users\Admin\AppData\Local\Temp\gjdtv.exe
    C:\Users\Admin\AppData\Local\Temp\\gjdtv.exe "C:\Users\Admin\AppData\Local\Temp\e399c67287b960692c4ea816d861e24f3cc8bc0fe75f7f8165aab20cae9d8d25N.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3156
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\aecih\rtbsq.tsr",crc32 C:\Users\Admin\AppData\Local\Temp\gjdtv.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)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3068
    - - \??\c:\windows\SysWOW64\taskkill.exe
        
        taskkill /f /im attrib.exe
        5⤵
        System Location Discovery: System Language Discovery
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2772

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

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

gjdtv.exe

Path C:\Users\Admin\AppData\Local\Temp\gjdtv.exe
Size 93KB
SHA256 b65fcd5c248418d3fd6f254e8af81e22250350c930b467beb720997e10d88b1e
MD5 e06f1eef31bfb5761294c274b862aca0
SHA1 98bf8504e076a0147898757ffacdc1a2e2653867
SHA512 8d86675c357b67fbe04b7ce5b71c11149293da2f0a8ca19fb7b7e2e55c65053f230a63907dcf942882d5dd89db7a6b7639870c313772449efc34810e8b17729a
SSDEEP 1536:1MIPgEm56wnbkKC2ZyBJU066lwLCRVEB+nR/y8cmNrEIviCOzuajkrDl9HNSju:11PgEOng1d66jRVa+n4NmNNouukrD7Hn
MD5 SHA1 SHA512 SSDEEP

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rtbsq.tsr

Path \??\c:\aecih\rtbsq.tsr
Size 57KB
SHA256 964e4dd2532d540bb61d3c7ccc833f2358d8cd6b2eabc3a2d51183a18b59f82d
MD5 2f53f49e01f09d6e6064871eec1955cd
SHA1 a6e1a6e5c2080d0fb2f7a872e3902a8a4a1a9b5f
SHA512 2cb98030c3df7417c04f796f78f23f96d381871d9c7ae4a14116764e915b2e2f56b9b3a6fb76fedc50a17788de9538fc7954a7b73bf17e4be43e1fc1a06bc218
SSDEEP 1536:sTVgJaaYk6IBx84RuM6x6sujkrDl9HNS:sTVL9axF0MWJ6krD7HNS
MD5 SHA1 SHA512 SSDEEP

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memory/1448-0-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/1448-1-0x0000000000A70000-0x0000000000A71000-memory.dmp

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memory/1448-3-0x0000000000400000-0x0000000000428000-memory.dmp

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memory/3068-12-0x0000000010000000-0x0000000010022000-memory.dmp

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memory/3068-13-0x0000000010000000-0x0000000010022000-memory.dmp

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memory/3068-15-0x0000000010000000-0x0000000010022000-memory.dmp

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memory/3068-17-0x0000000010000000-0x0000000010022000-memory.dmp

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memory/3156-7-0x0000000000630000-0x0000000000631000-memory.dmp

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memory/3156-9-0x0000000000400000-0x0000000000428000-memory.dmp

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