5d93b84bf2d6519a5b7ba45e27d9d014106f19102df7281fa58a0ee081f68724

Analysis

max time kernel
93s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
02-02-2024 23:21

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General

Target

8aca73a0d688b7c3b555dbb5799dba92.exe
Size

16KB
MD5

8aca73a0d688b7c3b555dbb5799dba92
SHA1

565bafc4bf770d10c3bcfd1f5ed2b24194b35253
SHA256

5d93b84bf2d6519a5b7ba45e27d9d014106f19102df7281fa58a0ee081f68724
SHA512

06387990bc2583b9715a0e71d08feffe4db4f81cb984c7262005bce67ea4c0f91c556b533e875906550c6938b07d68c004b543063fe750da4c0b5951fef7fb57
SSDEEP

384:gqmhgzhZvetCeBcfWiIrcDxn2RV+kBo6p:gqEeZvetNBcxDI3o6p

Score

10^/10

persistence upx

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\exqobujj.dll = "{71A78CD4-E470-4a18-8457-E0E0283DD507}"	8aca73a0d688b7c3b555dbb5799dba92.exe

Loads dropped DLL 1 IoCs

pid	Process
2080	8aca73a0d688b7c3b555dbb5799dba92.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2080-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
behavioral2/memory/2080-14-0x0000000000400000-0x000000000040D000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\exqobujj.tmp	8aca73a0d688b7c3b555dbb5799dba92.exe
File opened for modification	C:\Windows\SysWOW64\exqobujj.tmp	8aca73a0d688b7c3b555dbb5799dba92.exe
File opened for modification	C:\Windows\SysWOW64\exqobujj.nls	8aca73a0d688b7c3b555dbb5799dba92.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ThreadingModel = "Apartment"	8aca73a0d688b7c3b555dbb5799dba92.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}	8aca73a0d688b7c3b555dbb5799dba92.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32	8aca73a0d688b7c3b555dbb5799dba92.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ = "C:\\Windows\\SysWow64\\exqobujj.dll"	8aca73a0d688b7c3b555dbb5799dba92.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2080	8aca73a0d688b7c3b555dbb5799dba92.exe
2080	8aca73a0d688b7c3b555dbb5799dba92.exe
2080	8aca73a0d688b7c3b555dbb5799dba92.exe
2080	8aca73a0d688b7c3b555dbb5799dba92.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2080	8aca73a0d688b7c3b555dbb5799dba92.exe
2080	8aca73a0d688b7c3b555dbb5799dba92.exe
2080	8aca73a0d688b7c3b555dbb5799dba92.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 4536	2080	8aca73a0d688b7c3b555dbb5799dba92.exe	91
PID 2080 wrote to memory of 4536	2080	8aca73a0d688b7c3b555dbb5799dba92.exe	91
PID 2080 wrote to memory of 4536	2080	8aca73a0d688b7c3b555dbb5799dba92.exe	91

C:\Users\Admin\AppData\Local\Temp\8aca73a0d688b7c3b555dbb5799dba92.exe
"C:\Users\Admin\AppData\Local\Temp\8aca73a0d688b7c3b555dbb5799dba92.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\4DFC.tmp.bat
  2⤵
  PID:4536

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\4DFC.tmp.bat

Filesize
179B

MD5
6bba2557b229eee6673612d2f56a66c9

SHA1
2b89d7fefaf165462ebacb3c19bf4815c6d6fe7f

SHA256
a687d652b31bda58e11a652f61e09c8c6fc00295e1947fb1e10ad5011dddcf3c

SHA512
93436c3568a14f76775626986a154b14da7eef9ef9384a122977e20b16033ddcfd175d0a93fc005435ef8d1b410973697ca5e557f77b000d8137624eef8bcfd2

Download Submit
C:\Windows\SysWOW64\exqobujj.tmp

Filesize
2.2MB

MD5
2c316efe352f01c28502fcc07b975875

SHA1
da41bbab579319843bc75b7c9ba2d437ae3f56e6

SHA256
6d96cca9107ffe4302b3985b7d3ce8cf18394172c257b330d677aca17be5ef3b

SHA512
d1da0ade39e33d24e57de601ac8741f34560ea4676943c5837b927cf430157d9419a6066b11fdb058a2c6f72ee2721a8756aecf4d44694167ffa7b6ca6f6c8dd

Download Submit
memory/2080-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2080-14-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/2080-15-0x0000000010000000-0x0000000010008000-memory.dmp

Filesize
32KB

Download
memory/2080-23-0x0000000010000000-0x0000000010008000-memory.dmp

Filesize
32KB

Download