fc58af62e63a634abbe88f3d777792185ef184129569a6a029ead976e34acbfa

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

Processes:

crss.exe

pid process

2856 crss.exe
Loads dropped DLL 2 IoCs

Processes:

a04598775fae6b5adc9a95381961f18c.exe

pid process

344 a04598775fae6b5adc9a95381961f18c.exe
344 a04598775fae6b5adc9a95381961f18c.exe

pid	process
2856	crss.exe

pid	process
344	a04598775fae6b5adc9a95381961f18c.exe
344	a04598775fae6b5adc9a95381961f18c.exe

UPX packed file 11 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2640-7-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2640-9-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2640-13-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2640-19-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2640-22-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2640-16-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2864-71-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2640-96-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2864-97-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2864-100-0x0000000000400000-0x000000000040C000-memory.dmp	upx
behavioral1/memory/2864-111-0x0000000000400000-0x000000000040C000-memory.dmp	upx

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

a04598775fae6b5adc9a95381961f18c.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\Download Manager2 = "C:\\Users\\Admin\\Downloads\\crss.exe"	a04598775fae6b5adc9a95381961f18c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\Profile Manager2 = "C:\\Users\\Admin\\crss.exe"	a04598775fae6b5adc9a95381961f18c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2444714103-3190537498-3629098939-1000\Software\Microsoft\Windows\CurrentVersion\Run\Document Explorer2 = "C:\\Users\\Admin\\Documents\\crss.exe"	a04598775fae6b5adc9a95381961f18c.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

a04598775fae6b5adc9a95381961f18c.exe

description	pid	process	target process
PID 2228 set thread context of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 set thread context of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe

Gathers network information 2 TTPs 2 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command and Scripting Interpreter
T1059

Processes:

ipconfig.exeipconfig.exe

pid process

2600 ipconfig.exe
2688 ipconfig.exe

pid	process
2600	ipconfig.exe
2688	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

a04598775fae6b5adc9a95381961f18c.exe

pid	process
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

a04598775fae6b5adc9a95381961f18c.exea04598775fae6b5adc9a95381961f18c.execrss.exe

pid process

2228 a04598775fae6b5adc9a95381961f18c.exe
2640 a04598775fae6b5adc9a95381961f18c.exe
2856 crss.exe

pid	process
2228	a04598775fae6b5adc9a95381961f18c.exe
2640	a04598775fae6b5adc9a95381961f18c.exe
2856	crss.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

a04598775fae6b5adc9a95381961f18c.exea04598775fae6b5adc9a95381961f18c.exea04598775fae6b5adc9a95381961f18c.exe

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:2228
- 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:2640
- - C:\Windows\SysWOW64\ipconfig.exe
    ipconfig /renew
    3⤵
    - Gathers network information
    PID:2688
- 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:344
- - C:\Users\Admin\crss.exe
    "C:\Users\Admin\crss.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:2856
  - - C:\Users\Admin\crss.exe
      "C:\Users\Admin\crss.exe"
      4⤵
      PID:2864
    - - C:\Windows\SysWOW64\ipconfig.exe
        
        ipconfig /renew
        5⤵
        Gathers network information
        
        PID:2600
  - - C:\Users\Admin\crss.exe
      "C:\Users\Admin\crss.exe"
      4⤵
      PID:2872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
88KB

MD5
a04598775fae6b5adc9a95381961f18c

SHA1
80391427a2f16c4e05fbda58d8b6a92dcf3e0e46

SHA256
fc58af62e63a634abbe88f3d777792185ef184129569a6a029ead976e34acbfa

SHA512
b29cafd7e380c23efd95f99e54b6d94819eda10ed50fa5d60e1b71322854ac6a628321574212714b7369f7e5c908a6b47a7bcc32f501944faa66fca1e1692bd5

Download Submit
memory/344-15-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-52-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-44-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-35-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-32-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-21-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-28-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-26-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/344-24-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2228-4-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2228-3-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2228-37-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2228-2-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2640-19-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-96-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-22-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-13-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2640-9-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-7-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-5-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2640-16-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2856-56-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2856-94-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2856-60-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2864-71-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2864-97-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2864-100-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2864-111-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2872-95-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2872-98-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download

description	pid	process	target process
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 2640	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 2228 wrote to memory of 344	2228	a04598775fae6b5adc9a95381961f18c.exe	a04598775fae6b5adc9a95381961f18c.exe
PID 344 wrote to memory of 2856	344	a04598775fae6b5adc9a95381961f18c.exe	crss.exe
PID 344 wrote to memory of 2856	344	a04598775fae6b5adc9a95381961f18c.exe	crss.exe
PID 344 wrote to memory of 2856	344	a04598775fae6b5adc9a95381961f18c.exe	crss.exe
PID 344 wrote to memory of 2856	344	a04598775fae6b5adc9a95381961f18c.exe	crss.exe
PID 2640 wrote to memory of 2688	2640	a04598775fae6b5adc9a95381961f18c.exe	ipconfig.exe
PID 2640 wrote to memory of 2688	2640	a04598775fae6b5adc9a95381961f18c.exe	ipconfig.exe
PID 2640 wrote to memory of 2688	2640	a04598775fae6b5adc9a95381961f18c.exe	ipconfig.exe
PID 2640 wrote to memory of 2688	2640	a04598775fae6b5adc9a95381961f18c.exe	ipconfig.exe

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads