2ee071579da35565f77a2dc017d1d86f82a08bb1922e3f2e0e9507e292b39e15

General

Target

53fd48d989c02c4cfd7d7cdbc9540940N.exe
Size

15KB
MD5

53fd48d989c02c4cfd7d7cdbc9540940
SHA1

ba8ebe275b24c823366ba4f06ccf2a0b6d126f72
SHA256

2ee071579da35565f77a2dc017d1d86f82a08bb1922e3f2e0e9507e292b39e15
SHA512

8d61cb60c33df2eba0a92f7d9282e129e8989a2e619e6d247c0befd44d9c91d417a4111715d1d6a1551c6899efff3e043686c7ae35f74fb4a6c2b06342d9dead
SSDEEP

384:IO3qdXlIQV0YXd45xuYiMcRWnPbeVGWLwbbbVHHHH4fff+:IO3EVdV0YXd4DuicNV3Ffff+

Score

8^/10

defense_evasion discovery evasion upx

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2092	attrib.exe

Deletes itself 1 IoCs

pid	Process
1344	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2400	zskhost.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2376-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/files/0x0008000000012102-3.dat	upx
behavioral1/memory/2376-6-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2400-7-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2400-10-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2400-13-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2400-16-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\zskhost.exe	53fd48d989c02c4cfd7d7cdbc9540940N.exe
File opened for modification	C:\Windows\Debug\zskhost.exe	53fd48d989c02c4cfd7d7cdbc9540940N.exe
File opened for modification	C:\Windows\Debug\zskhost.exe	attrib.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	53fd48d989c02c4cfd7d7cdbc9540940N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zskhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 2092	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	30
PID 2376 wrote to memory of 2092	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	30
PID 2376 wrote to memory of 2092	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	30
PID 2376 wrote to memory of 2092	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	30
PID 2376 wrote to memory of 1344	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	33
PID 2376 wrote to memory of 1344	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	33
PID 2376 wrote to memory of 1344	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	33
PID 2376 wrote to memory of 1344	2376	53fd48d989c02c4cfd7d7cdbc9540940N.exe	33

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2092	attrib.exe

C:\Users\Admin\AppData\Local\Temp\53fd48d989c02c4cfd7d7cdbc9540940N.exe
"C:\Users\Admin\AppData\Local\Temp\53fd48d989c02c4cfd7d7cdbc9540940N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\zskhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:2092
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\53FD48~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1344

C:\Windows\Debug\zskhost.exe
C:\Windows\Debug\zskhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:2400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\debug\zskhost.exe

Filesize
15KB

MD5
b74374e2e1c6b587442917aefee3e21a

SHA1
c8b7d5da9bc2afb6a1b86be62bc5c0fc83edc021

SHA256
e7b4f691746b293a5aec5de8b749c202c13686c395ca229c54e8359358ebe27f

SHA512
f32a7420b723bc668aa129fb488cdd960cb9e7a946383a9970484a4a03303c7c2b3b88d2060872b7de6e8b6207b8603ae0d2b94106acb8f61097f1a71350508d

Download Submit
memory/2376-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2376-6-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2400-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2400-10-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2400-13-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2400-16-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads