b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293

General

Target

b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe
Size

45KB
MD5

649be0a526be87d05c53586e221af7e6
SHA1

c403dd70bbcf66eeb2309fb5cbdc7b97da73ba30
SHA256

b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293
SHA512

8d478d1a2ae8d4ef0c0554989eaa3745580e0cc4334930f27637a9cd41eff3768916be8ce50a20d971626feb4e939e9b55108ddb4770f25c98b3ef103768d399
SSDEEP

768:nspXvLXH+0QzfJzno+u9EuyzXuPuNL/I+Z5/irdGTffTaAxtVTMM2abe23rso:ns1DXejzzuySWd/iYTDdVwmbe27so

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1136	WinSys.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00140000000054ab-58.dat	upx
behavioral1/files/0x00140000000054ab-59.dat	upx
behavioral1/files/0x00140000000054ab-61.dat	upx
behavioral1/files/0x00140000000054ab-65.dat	upx
behavioral1/memory/1320-67-0x0000000000400000-0x000000000042A000-memory.dmp	upx
behavioral1/memory/1136-68-0x0000000000400000-0x000000000042A000-memory.dmp	upx
behavioral1/memory/1136-69-0x0000000000400000-0x000000000042A000-memory.dmp	upx

Loads dropped DLL 2 IoCs

pid	Process
1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe
1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run	WinSys.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows systems = "C:\\Users\\Admin\\AppData\\Roaming\\WinSys.exe"	WinSys.exe
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows systems = "C:\\Users\\Admin\\AppData\\Roaming\\WinSys.exe"	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe
1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe
1136	WinSys.exe
1136	WinSys.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1320 wrote to memory of 1136	1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe	27
PID 1320 wrote to memory of 1136	1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe	27
PID 1320 wrote to memory of 1136	1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe	27
PID 1320 wrote to memory of 1136	1320	b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe	27

C:\Users\Admin\AppData\Local\Temp\b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe
"C:\Users\Admin\AppData\Local\Temp\b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1320
- C:\Users\Admin\AppData\Roaming\WinSys.exe
  C:\Users\Admin\AppData\Roaming\WinSys.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetWindowsHookEx
  PID:1136

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\WinSys.exe

Filesize
45KB

MD5
649be0a526be87d05c53586e221af7e6

SHA1
c403dd70bbcf66eeb2309fb5cbdc7b97da73ba30

SHA256
b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293

SHA512
8d478d1a2ae8d4ef0c0554989eaa3745580e0cc4334930f27637a9cd41eff3768916be8ce50a20d971626feb4e939e9b55108ddb4770f25c98b3ef103768d399

Download Submit
C:\Users\Admin\AppData\Roaming\WinSys.exe

Filesize
45KB

MD5
649be0a526be87d05c53586e221af7e6

SHA1
c403dd70bbcf66eeb2309fb5cbdc7b97da73ba30

SHA256
b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293

SHA512
8d478d1a2ae8d4ef0c0554989eaa3745580e0cc4334930f27637a9cd41eff3768916be8ce50a20d971626feb4e939e9b55108ddb4770f25c98b3ef103768d399

Download Submit
\Users\Admin\AppData\Roaming\WinSys.exe

Filesize
45KB

MD5
649be0a526be87d05c53586e221af7e6

SHA1
c403dd70bbcf66eeb2309fb5cbdc7b97da73ba30

SHA256
b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293

SHA512
8d478d1a2ae8d4ef0c0554989eaa3745580e0cc4334930f27637a9cd41eff3768916be8ce50a20d971626feb4e939e9b55108ddb4770f25c98b3ef103768d399

Download Submit
\Users\Admin\AppData\Roaming\WinSys.exe

Filesize
45KB

MD5
649be0a526be87d05c53586e221af7e6

SHA1
c403dd70bbcf66eeb2309fb5cbdc7b97da73ba30

SHA256
b75335a0428b001329a716bfffc07a314af2135b3fc46293d01c7a4eadee8293

SHA512
8d478d1a2ae8d4ef0c0554989eaa3745580e0cc4334930f27637a9cd41eff3768916be8ce50a20d971626feb4e939e9b55108ddb4770f25c98b3ef103768d399

Download Submit
memory/1136-68-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1136-69-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1320-57-0x0000000075771000-0x0000000075773000-memory.dmp

Filesize
8KB

Download
memory/1320-67-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download

Analysis

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