6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629

General

Target
6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe
Size 83KB
Sample240525-2thjjseb32
SHA256 6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629
MD5 2f0d21d0896b46a71dba6304879e9d09
SHA1 11d771a5b7724e419d01432b191ba9486ecd79dd
SHA512 70228c2a899479295b586f6f8b626da952d85f69a52cc2ec13b9dc1c438288b7cbc75272c59b9c0bcb119b0805b6a2a417525c14ef77ad595f35cf9380395d80
SSDEEP 1536:yr3Z5IfQmv81a7pP1xF3yX2tM/jTEwwwEiiiiR:WJOfQm01q9X3yX2q/jTQ
MD5 SHA1 SHA512 SSDEEP

Score

9^/10

evasion upx

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 5 IoCs

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/files/0x0006000000023278-4.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/556-5-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2700-6-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/556-7-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral2/files/0x0006000000023278-4.dat	UPX
behavioral2/memory/556-5-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral2/memory/2700-6-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral2/memory/556-7-0x0000000000400000-0x0000000000416000-memory.dmp	UPX

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
2792	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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe

Executes dropped EXE 1 IoCs

pid	Process
556	egkhost.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/files/0x0006000000023278-4.dat	upx
behavioral2/memory/556-5-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/2700-6-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/556-7-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\egkhost.exe	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe
File opened for modification	C:\Windows\Debug\egkhost.exe	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe
File opened for modification	C:\Windows\Debug\egkhost.exe	attrib.exe

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

System Information Discovery
T1082

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	egkhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	egkhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2792	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe	83
PID 2700 wrote to memory of 2792	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe	83
PID 2700 wrote to memory of 2792	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe	83
PID 2700 wrote to memory of 1784	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe	89
PID 2700 wrote to memory of 1784	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe	89
PID 2700 wrote to memory of 1784	2700	6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe	89

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2792	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe
"C:\Users\Admin\AppData\Local\Temp\6c86627371d5f719d39125ac7eeaf9e050ddecbd7d8a05cba9b00b0bd7caf629.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\egkhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:2792
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\6C8662~1.EXE > nul
  2⤵
  PID:1784

C:\Windows\Debug\egkhost.exe
C:\Windows\Debug\egkhost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:556

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

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

egkhost.exe

Path C:\Windows\Debug\egkhost.exe
Size 83KB
SHA256 85eeb4d3536d690a7dad73262759e507c1e3f64b31c80e2aa3f02eeb3bf49889
MD5 cccac78e593cc2fdace136f4e40ac3c2
SHA1 0bebdbf49da8891be432e3d3b3af18c489b27fe6
SHA512 408bfbb2b0eb9f3a27781104b59f46399d23687dcdd1010f4f1b37ec744a96651c00f42e39761d1510e238c304e83135db61fa79ac2e83ff65edaa42df948b42
SSDEEP 1536:yr3Z5IfQmv81a7pP1xF3yX2tM/jTEwwwEiiiic:WJOfQm01q9X3yX2q/jTx
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/556-5-0x0000000000400000-0x0000000000416000-memory.dmp

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memory/556-7-0x0000000000400000-0x0000000000416000-memory.dmp

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memory/2700-0-0x0000000000400000-0x0000000000416000-memory.dmp

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memory/2700-6-0x0000000000400000-0x0000000000416000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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