0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3

General

Target

0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe
Size

36KB
MD5

43bb908434a2bd7fdae163fdf3a34ad0
SHA1

5ff122f465077ba749b0b80592b3f67de01188ff
SHA256

0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3
SHA512

e5c415fb8d28b60d7fe509b8ce1bd6fa9d87576640e26187a7b89085d2a1a9b8cddc6473459311e8463bc01480821574ccaaa4d8256538380a1eb6da1df52c10
SSDEEP

768:4noSEjp9Plchfr6TUqnbcuyD7UYK4pavvvZeee26666HEEExTtqqqqBttttf:4oSEZWTUUqnouy8YXEvvvZeee5Lttttf

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2872	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2264	zskhost.exe

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

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2800-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x000b000000012259-3.dat	upx
behavioral1/memory/2800-5-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2264-6-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2264-12-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/memory/2264-15-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Debug\zskhost.exe	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe
File opened for modification	C:\Windows\Debug\zskhost.exe	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.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 3 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	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zskhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	zskhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	zskhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2800	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2800 wrote to memory of 2872	2800	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe	31
PID 2800 wrote to memory of 2872	2800	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe	31
PID 2800 wrote to memory of 2872	2800	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe	31
PID 2800 wrote to memory of 2872	2800	0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe	31

C:\Users\Admin\AppData\Local\Temp\0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe
"C:\Users\Admin\AppData\Local\Temp\0b97fb53b0b7a6acb093790cef3e3392d76eb893e0167e3510f9a19d848a78e3N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\0B97FB~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:2872

C:\Windows\Debug\zskhost.exe
C:\Windows\Debug\zskhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:2264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\debug\zskhost.exe

Filesize
36KB

MD5
02b7aa329d26d41b5d820347ca91f86d

SHA1
d8efc2da70a3f8c1c4060825e6d0d12e3797e8ae

SHA256
593d1d2e4ad8e2348014e567cf9a98c423b5e7882eac74574a8e58833b494c2b

SHA512
6f8fdb4d03ea3cb550c934df74583b959100a535a5a7bd6a6c58f21f9da6027e92c53d249824ca02f7b5a1a99c1c418e14218b3908f5e0492153c0958247d555

Download Submit
memory/2264-6-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2264-12-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2264-15-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2800-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2800-5-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download

Analysis

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