fc58af62e63a634abbe88f3d777792185ef184129569a6a029ead976e34acbfa

Analysis

max time kernel
6s
max time network
132s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
16-02-2024 11:32

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General

Target

a04598775fae6b5adc9a95381961f18c.exe
Size

88KB
MD5

a04598775fae6b5adc9a95381961f18c
SHA1

80391427a2f16c4e05fbda58d8b6a92dcf3e0e46
SHA256

fc58af62e63a634abbe88f3d777792185ef184129569a6a029ead976e34acbfa
SHA512

b29cafd7e380c23efd95f99e54b6d94819eda10ed50fa5d60e1b71322854ac6a628321574212714b7369f7e5c908a6b47a7bcc32f501944faa66fca1e1692bd5
SSDEEP

1536:tQzq7KAAwJENVy7yCe3j77GgP6UmGGJXkBKuZgQc:toAK3wqNUmb3jGgPZc4XZgQc

Score

7^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1868	crss.exe

Loads dropped DLL 2 IoCs

pid	Process
2692	a04598775fae6b5adc9a95381961f18c.exe
2692	a04598775fae6b5adc9a95381961f18c.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3060-5-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-7-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-18-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-21-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-16-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-11-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-94-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2684-95-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/3060-97-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2684-98-0x0000000000400000-0x000000000040C000-memory.dmp	upx

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\Profile Manager2 = "C:\\Users\\Admin\\crss.exe"	a04598775fae6b5adc9a95381961f18c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\Document Explorer2 = "C:\\Users\\Admin\\Documents\\crss.exe"	a04598775fae6b5adc9a95381961f18c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-452311807-3713411997-1028535425-1000\Software\Microsoft\Windows\CurrentVersion\Run\Download Manager2 = "C:\\Users\\Admin\\Downloads\\crss.exe"	a04598775fae6b5adc9a95381961f18c.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2368 set thread context of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 set thread context of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29

Gathers network information 2 TTPs 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2608	ipconfig.exe
2856	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2368	a04598775fae6b5adc9a95381961f18c.exe
3060	a04598775fae6b5adc9a95381961f18c.exe
1868	crss.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 3060	2368	a04598775fae6b5adc9a95381961f18c.exe	28
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2368 wrote to memory of 2692	2368	a04598775fae6b5adc9a95381961f18c.exe	29
PID 2692 wrote to memory of 1868	2692	a04598775fae6b5adc9a95381961f18c.exe	30
PID 2692 wrote to memory of 1868	2692	a04598775fae6b5adc9a95381961f18c.exe	30
PID 2692 wrote to memory of 1868	2692	a04598775fae6b5adc9a95381961f18c.exe	30
PID 2692 wrote to memory of 1868	2692	a04598775fae6b5adc9a95381961f18c.exe	30
PID 3060 wrote to memory of 2608	3060	a04598775fae6b5adc9a95381961f18c.exe	31
PID 3060 wrote to memory of 2608	3060	a04598775fae6b5adc9a95381961f18c.exe	31
PID 3060 wrote to memory of 2608	3060	a04598775fae6b5adc9a95381961f18c.exe	31
PID 3060 wrote to memory of 2608	3060	a04598775fae6b5adc9a95381961f18c.exe	31

C:\Users\Admin\AppData\Local\Temp\a04598775fae6b5adc9a95381961f18c.exe
"C:\Users\Admin\AppData\Local\Temp\a04598775fae6b5adc9a95381961f18c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2368
- C:\Users\Admin\AppData\Local\Temp\a04598775fae6b5adc9a95381961f18c.exe
  "C:\Users\Admin\AppData\Local\Temp\a04598775fae6b5adc9a95381961f18c.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /renew
    3⤵
    - Gathers network information
    PID:2608
- C:\Users\Admin\AppData\Local\Temp\a04598775fae6b5adc9a95381961f18c.exe
  "C:\Users\Admin\AppData\Local\Temp\a04598775fae6b5adc9a95381961f18c.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\Users\Admin\crss.exe
    "C:\Users\Admin\crss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:1868
  - - C:\Users\Admin\crss.exe
      "C:\Users\Admin\crss.exe"
      4⤵
      PID:2684
    - - C:\Windows\SysWOW64\ipconfig.exe
        
        ipconfig /renew
        5⤵
        Gathers network information
        
        PID:2856
  - - C:\Users\Admin\crss.exe
      "C:\Users\Admin\crss.exe"
      4⤵
      PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\Downloads\crss.exe

Filesize
88KB

MD5
a04598775fae6b5adc9a95381961f18c

SHA1
80391427a2f16c4e05fbda58d8b6a92dcf3e0e46

SHA256
fc58af62e63a634abbe88f3d777792185ef184129569a6a029ead976e34acbfa

SHA512
b29cafd7e380c23efd95f99e54b6d94819eda10ed50fa5d60e1b71322854ac6a628321574212714b7369f7e5c908a6b47a7bcc32f501944faa66fca1e1692bd5

Download Submit
memory/1868-55-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1868-92-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/1868-58-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2368-2-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2368-34-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2540-96-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2540-93-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2684-98-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2684-95-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2692-27-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-25-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-51-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-31-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-17-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-35-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-22-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-12-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-43-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2692-36-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3060-21-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-11-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-16-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-18-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3060-94-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-7-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-5-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-97-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/3060-3-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download