a3d86c5177e6aca6bdb99b52c0e0424645a362ccd31c4c1698581cfc4fc41160

Analysis

max time kernel
149s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28/02/2024, 19:31

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General

Target

acabed941479768651f6fe6a9fac201c.exe
Size

458KB
MD5

acabed941479768651f6fe6a9fac201c
SHA1

3da8663a6aa45480d86ff451634a00d5aed76917
SHA256

a3d86c5177e6aca6bdb99b52c0e0424645a362ccd31c4c1698581cfc4fc41160
SHA512

68e15101718478e7be568b33c23bcbe5dc6319ffc21dc1256e089ad8023c93f33515ac4570d0338c177fccd5c6d666a5ce496cc677b571c7dd313ffdeda76f78
SSDEEP

6144:2YWGHdSkJdlTQm2PdLFeV4H3T9rOOQM48rA8H74rHYaWqiqTAFVDsCXvxUt:pIyqm+lFtH3BzlA+KUq0LDsavat

Score

8^/10

evasion persistence upx

Malware Config

Signatures

Disables Task Manager via registry modification
evasion

Executes dropped EXE 1 IoCs

pid	Process
1284	BgBkaFsuthfOK.exe

Loads dropped DLL 2 IoCs

pid	Process
2220	acabed941479768651f6fe6a9fac201c.exe
2220	acabed941479768651f6fe6a9fac201c.exe

UPX packed file 1 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2220-1-0x0000000000600000-0x0000000000680000-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-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\BgBkaFsuthfOK = "C:\\ProgramData\\BgBkaFsuthfOK.exe"	acabed941479768651f6fe6a9fac201c.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	acabed941479768651f6fe6a9fac201c.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	acabed941479768651f6fe6a9fac201c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	BgBkaFsuthfOK.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	BgBkaFsuthfOK.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Download	acabed941479768651f6fe6a9fac201c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Internet Explorer\Download\CheckExeSignatures = "no"	acabed941479768651f6fe6a9fac201c.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2220	acabed941479768651f6fe6a9fac201c.exe
2220	acabed941479768651f6fe6a9fac201c.exe
2220	acabed941479768651f6fe6a9fac201c.exe
1284	BgBkaFsuthfOK.exe
2220	acabed941479768651f6fe6a9fac201c.exe
1284	BgBkaFsuthfOK.exe
2220	acabed941479768651f6fe6a9fac201c.exe
1284	BgBkaFsuthfOK.exe
2220	acabed941479768651f6fe6a9fac201c.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe
1284	BgBkaFsuthfOK.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2220	acabed941479768651f6fe6a9fac201c.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 1284	2220	acabed941479768651f6fe6a9fac201c.exe	28
PID 2220 wrote to memory of 1284	2220	acabed941479768651f6fe6a9fac201c.exe	28
PID 2220 wrote to memory of 1284	2220	acabed941479768651f6fe6a9fac201c.exe	28
PID 2220 wrote to memory of 1284	2220	acabed941479768651f6fe6a9fac201c.exe	28

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	acabed941479768651f6fe6a9fac201c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr = "1"	acabed941479768651f6fe6a9fac201c.exe

C:\Users\Admin\AppData\Local\Temp\acabed941479768651f6fe6a9fac201c.exe
"C:\Users\Admin\AppData\Local\Temp\acabed941479768651f6fe6a9fac201c.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Maps connected drives based on registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2220
- C:\ProgramData\BgBkaFsuthfOK.exe
  "C:\ProgramData\BgBkaFsuthfOK.exe"
  2⤵
  - Executes dropped EXE
  - Maps connected drives based on registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1284

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\ProgramData\BgBkaFsuthfOK.exe

Filesize
458KB

MD5
acabed941479768651f6fe6a9fac201c

SHA1
3da8663a6aa45480d86ff451634a00d5aed76917

SHA256
a3d86c5177e6aca6bdb99b52c0e0424645a362ccd31c4c1698581cfc4fc41160

SHA512
68e15101718478e7be568b33c23bcbe5dc6319ffc21dc1256e089ad8023c93f33515ac4570d0338c177fccd5c6d666a5ce496cc677b571c7dd313ffdeda76f78

Download Submit
memory/1284-12-0x0000000000220000-0x0000000000278000-memory.dmp

Filesize
352KB

Download
memory/2220-1-0x0000000000600000-0x0000000000680000-memory.dmp

Filesize
512KB

Download
memory/2220-0-0x0000000000220000-0x0000000000278000-memory.dmp

Filesize
352KB

Download
memory/2220-3-0x0000000000600000-0x0000000000680000-memory.dmp

Filesize
512KB

Download