e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146

General

Target

e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe
Size

125KB
MD5

cd1a402bb58184a2d8f2f41bbd5de2da
SHA1

44337318d71cf7995ead33608cd5d145e19a88dc
SHA256

e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146
SHA512

7ebade2b0de963b68337c7f498e359980b39957cae0ca8c40d8d45cb7e58374b3524ca63ec5e6a4f64c76d2340f9ce8ec8470e1418a68fbde0f10fb8e24f7be8
SSDEEP

1536:QaaczXhtqkUlX/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJnddI3GMbI:la7qc9rqzMseNoVv9EJFdXMbI

Score

9^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1308-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1308-11-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1308-12-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/1308-13-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 10 IoCs

Processes:

rundll32.exe

flow	pid	process
3	1308	rundll32.exe
5	1308	rundll32.exe
8	1308	rundll32.exe
9	1308	rundll32.exe
10	1308	rundll32.exe
13	1308	rundll32.exe
14	1308	rundll32.exe
15	1308	rundll32.exe
17	1308	rundll32.exe
18	1308	rundll32.exe

Deletes itself 1 IoCs

Processes:

ajvtm.exe

pid process

2056 ajvtm.exe
Executes dropped EXE 1 IoCs

Processes:

ajvtm.exe

pid process

2056 ajvtm.exe
Loads dropped DLL 4 IoCs

Processes:

rundll32.exe

pid process

1308 rundll32.exe
1308 rundll32.exe
1308 rundll32.exe
1308 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

pid	process
2056	ajvtm.exe

pid	process
2056	ajvtm.exe

pid	process
1308	rundll32.exe
1308	rundll32.exe
1308	rundll32.exe
1308	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\zobxk\\hchum.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

Processes:

rundll32.exe

description	ioc	process
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\g:	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

Processes:

rundll32.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 rundll32.exe

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

Processes:

rundll32.exe

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

Processes:

PING.EXE

pid process

2152 PING.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

1308 rundll32.exe
1308 rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 1308 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exeajvtm.exe

pid process

1420 e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe
2056 ajvtm.exe

pid	process
2152	PING.EXE

pid	process
1308	rundll32.exe
1308	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1308	rundll32.exe

pid	process
1420	e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe
2056	ajvtm.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.execmd.exeajvtm.exe

description	pid	process	target process
PID 1420 wrote to memory of 764	1420	e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe	cmd.exe
PID 1420 wrote to memory of 764	1420	e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe	cmd.exe
PID 1420 wrote to memory of 764	1420	e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe	cmd.exe
PID 1420 wrote to memory of 764	1420	e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe	cmd.exe
PID 764 wrote to memory of 2152	764	cmd.exe	PING.EXE
PID 764 wrote to memory of 2152	764	cmd.exe	PING.EXE
PID 764 wrote to memory of 2152	764	cmd.exe	PING.EXE
PID 764 wrote to memory of 2152	764	cmd.exe	PING.EXE
PID 764 wrote to memory of 2056	764	cmd.exe	ajvtm.exe
PID 764 wrote to memory of 2056	764	cmd.exe	ajvtm.exe
PID 764 wrote to memory of 2056	764	cmd.exe	ajvtm.exe
PID 764 wrote to memory of 2056	764	cmd.exe	ajvtm.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe
PID 2056 wrote to memory of 1308	2056	ajvtm.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe
"C:\Users\Admin\AppData\Local\Temp\e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1420

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&c:\ajvtm.exe "C:\Users\Admin\AppData\Local\Temp\e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:764

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:2152

\??\c:\ajvtm.exe
c:\ajvtm.exe "C:\Users\Admin\AppData\Local\Temp\e7be20d8287b6051955e40fc8f56c018c5ca0b794e5a2b81cb5d835f6ed99146.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2056

\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\zobxk\hchum.dll",init c:\ajvtm.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:1308

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

\??\c:\ajvtm.exe
Filesize
125KB

MD5
aa58ad4c8c4b1ca9d5ac1f4b1c9a7ae8

SHA1
6a58f8cbc7464a9476349411e4eef9c293b90d29

SHA256
21a8f7c1fbb5a7eeea74c052379220cd00a2c1ddb955fcbccc039311e4861208

SHA512
c91b12e11658541040e8a79c16a57b01d70cf658577bcdf78b5a6d3fc93a3d50e1993e0032e58edcac37ccac287f53f295e698d92b770db35a61b3a69673043c

Download Submit
\??\c:\zobxk\hchum.dll
Filesize
50KB

MD5
ab32c5bfd7ecfbe9ed733dfb81210933

SHA1
4d5c6e7a0031691f12e78b096ff928b0d55bdfab

SHA256
a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a

SHA512
59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5

Download Submit
memory/1308-8-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download
memory/1308-10-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download
memory/1308-11-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download
memory/1308-12-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download
memory/1308-13-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads