064a91d8f0a904a2f8f305b58c1843f2902310f450da1a2ad80a019d0aa22191

General

Target
jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
Size 34KB
Sample260919-yndrmabe59
SHA256 064a91d8f0a904a2f8f305b58c1843f2902310f450da1a2ad80a019d0aa22191
MD5 aeecd2531b832e4fd4027bdcecf589a9
SHA1 864ed7fbf4003af54669efe0e7176a9d658a70ba
SHA512 e157ae98e4cf245d086386535f96bb7140adfd16422ef4678cbebb93de0c23258b5b4df7703d002876fb83e2a67726e8c6b488122c502d2107e05a4c20c12be6
SSDEEP 768:tfmjLcK2YjddzbQ2QwHTRFi/H5vVJS5VCdLPnPTU71w2zz:JmNlzUR0RovJV4T0PY71Tzz
TLSH
T176F2E14B8B5E4844C1C1033CABBB4F25A71B2A95226D3F8F1AB896BE7E745250D34F1C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
3336	rundll32.exe

Disables service(s) 3 TTPs
defense_evasion execution

Windows Service
T1543.003

Service Stop
T1489

Service Execution
T1569.002

Loads dropped DLL 1 IoCs

pid	Process
3336	rundll32.exe

Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Drops file in System32 directory 10 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\YUksuser.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\YUmidimap.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\comres.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\sysapp9.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\ksuser.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\midimap.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\YUcomres.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
File created	C:\Windows\SysWOW64\dllcache\comres.dll	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3684-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/3684-9-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
3200	sc.exe
4248	sc.exe

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3684 wrote to memory of 2908	3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe	89
PID 3684 wrote to memory of 4248	3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe	90
PID 3684 wrote to memory of 3200	3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe	91
PID 3684 wrote to memory of 3336	3684	jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe	93
PID 2908 wrote to memory of 1364	2908	net.exe	96

C:\Users\Admin\AppData\Local\Temp\jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3684
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2908
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1364
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:4248
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:3200
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1789847737.dat, ServerMain c:\users\admin\appdata\local\temp\jaffacakes118__aeecd2531b832e4fd4027bdcecf589a9.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:3336

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

System Services

2

T1569

Service Execution

2

T1569.002

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

2

T1489

Replay Monitor

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Downloads

1789847737.dat

Path C:\Users\Admin\AppData\Local\Temp\1789847737.dat
Size 34KB
SHA256 be7833d52f17b7ea4bf10b410294f88268149462146dc92f366a10f66178e915
MD5 e0e5a08db8c5642eed02bf77fb96d064
SHA1 510babbd83f4514346e2e9cadcfbd022cb33d9da
SHA512 b5f247e72d4cd8c26ec8e13e4dcdefc8cd1192c8c49a5aa561631cc86b077d2a31492fabaada70e4e738548babf9fbe3ba8c094fcfe0e12d065dcacb45184863
SSDEEP 768:g6d33j0GJWu8F+MDjASl376rEqsmF1m2OhR4JxqhY0A:g833j0zF+Al976rEqXyR4Jvz
TLSH
T1BDF27D52BA4785A3D2E2423076513FB68BF828341E0761AACB73D7871DB42C7DE76207
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3684-0-0x0000000000400000-0x0000000000416000-memory.dmp

Download

memory/3684-9-0x0000000000400000-0x0000000000416000-memory.dmp