bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab

Analysis

max time kernel
144s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
09/06/2024, 07:43

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General

Target
bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe
Size 80KB
Sample240609-jka41age49
SHA256 bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab
MD5 ae5e818a9ef0cf433ece45015b650378
SHA1 83d9f4dd4878b7551fff4ab988e68b5efdea92bb
SHA512 8c470b3e279e5425030ebe4354a149d3c769a77980273b457b47cc5ae2be09b4d5a8fb6c06ddf5d98cec258cedc3eb6cca8842ace58b58e3b8526fb5717dd42c
SSDEEP 1536:bDcWLfIbgEp10gyX/dtnTHNWnnn6222229B:bDXL0n0gyX/d1re22229B
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/4620-0-0x0000000000400000-0x0000000000410000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x000900000002297e-3.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/816-5-0x0000000000400000-0x0000000000410000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/816-6-0x0000000000400000-0x0000000000410000-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
1180	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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe

Executes dropped EXE 1 IoCs

pid	Process
816	uyghost.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\uyghost.exe	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe
File opened for modification	C:\Windows\Debug\uyghost.exe	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe
File opened for modification	C:\Windows\Debug\uyghost.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	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4620 wrote to memory of 1180	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe	81
PID 4620 wrote to memory of 1180	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe	81
PID 4620 wrote to memory of 1180	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe	81
PID 4620 wrote to memory of 4616	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe	87
PID 4620 wrote to memory of 4616	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe	87
PID 4620 wrote to memory of 4616	4620	bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe	87

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1180	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe
"C:\Users\Admin\AppData\Local\Temp\bacb14277cfed7b68453deea016c27099e8560c05fdc72a3998767d1406528ab.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4620
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\uyghost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:1180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\BACB14~1.EXE > nul
  2⤵
  PID:4616

C:\Windows\Debug\uyghost.exe
C:\Windows\Debug\uyghost.exe
1⤵
- Executes dropped EXE
PID:816

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

uyghost.exe

Path C:\Windows\debug\uyghost.exe
Size 80KB
SHA256 08e9b108e7cef2f277d90ad58ca7ddfc4599c659283c2ddd1600a93560c6cb05
MD5 d1b76d0bbcb4f1bf3c79be1cb5a3d807
SHA1 d1e64c23be81b1b481ed8e0fcdf76b2a38f7d38d
SHA512 69f49abaef30ab4db8fd5dc96c21b3a25c2ab5a773293ce858c771a18fb0199fb3b4f201bfe06a4438fd92d3018b1bc4e723882731adb97bbea90f081fda4fa4
SSDEEP 1536:bDcWLfIbgEp10gyX/dtnTHNWnnn6222229b:bDXL0n0gyX/d1re22229b
MD5 SHA1 SHA512 SSDEEP

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memory/816-5-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/816-6-0x0000000000400000-0x0000000000410000-memory.dmp

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memory/4620-0-0x0000000000400000-0x0000000000410000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads