a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84

Analysis

max time kernel
140s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
14/06/2024, 02:20

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General

Target
a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
Size 66KB
Sample240614-csveaasajb
SHA256 a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84
MD5 b6cf492f580943b7f3c5a6115e2b783f
SHA1 44452b62ad27d90f5c5010f1cf813012705e24f8
SHA512 6e63186895ee399f27ce93aab963c9e5cff0d5cdab0084f1a67ce5b267c51018cea8a755a17d1a2cf179884e9ea3c6dcbd4aa6fcb0d0326341cfd0d6ee99328b
SSDEEP 768:ZrItKyw5WHXfQIhIiIk9ecAaVPD96KyX6P:Zr3Z5IfQIR81ad5yX6P
MD5 SHA1 SHA512 SSDEEP

Score

9^/10

evasion

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 4 IoCs

resource	yara_rule
behavioral2/memory/3456-0-0x0000000000400000-0x0000000000411000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000700000002328e-3.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3792-5-0x0000000000400000-0x0000000000411000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3792-6-0x0000000000400000-0x0000000000411000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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
3732	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe

Executes dropped EXE 1 IoCs

pid	Process
3792	rgkhost.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\rgkhost.exe	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
File opened for modification	C:\Windows\Debug\rgkhost.exe	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
File opened for modification	C:\Windows\Debug\rgkhost.exe	attrib.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3456 wrote to memory of 3732	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe	82
PID 3456 wrote to memory of 3732	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe	82
PID 3456 wrote to memory of 3732	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe	82
PID 3456 wrote to memory of 3104	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe	87
PID 3456 wrote to memory of 3104	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe	87
PID 3456 wrote to memory of 3104	3456	a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe	87

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3732	attrib.exe

C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe
"C:\Users\Admin\AppData\Local\Temp\a7eca882afec97c968523e7b41f17292b942cf716c33b5c8e1b4eed92fb88c84.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3456
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\rgkhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:3732
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A7ECA8~1.EXE > nul
  2⤵
  PID:3104

C:\Windows\Debug\rgkhost.exe
C:\Windows\Debug\rgkhost.exe
1⤵
- Executes dropped EXE
PID:3792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

rgkhost.exe

Path C:\Windows\debug\rgkhost.exe
Size 66KB
SHA256 41b53c9d0de248bc19cd0ce32c13b30c59e4c0c7600ef86cbee3b7fdbe97dd17
MD5 f1167e3ac008c6264e8e9485df343051
SHA1 79daf063544bec73011b1d0f69fd922b56828a24
SHA512 9d40bd7a0517b971ed97e93fc16dbfc9984ea38ea6c5ae2e32eb733951eaee90666ac8d20cc244639b1de909c0cf3c945306ce0120c0e48285ce496652895083
SSDEEP 768:ZrItKyw5WHXfQIhIiIk9ecAaVPD96KyX6Q:Zr3Z5IfQIR81ad5yX6Q
MD5 SHA1 SHA512 SSDEEP

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memory/3456-0-0x0000000000400000-0x0000000000411000-memory.dmp

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memory/3792-5-0x0000000000400000-0x0000000000411000-memory.dmp

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memory/3792-6-0x0000000000400000-0x0000000000411000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads