143c3ef12dd6be30aaf1cd9b9fb18b0c827a151b5cfd5c59e2d7d96bff5e0cd5

General

Target

387d702afc2f944e6c94ce5aea05cfa4.exe
Size

1.5MB
MD5

387d702afc2f944e6c94ce5aea05cfa4
SHA1

1f5963d400c7994d0ae417bab256aa5629cad37e
SHA256

143c3ef12dd6be30aaf1cd9b9fb18b0c827a151b5cfd5c59e2d7d96bff5e0cd5
SHA512

7bc9cd95ebdf76ec4c8fe38ac678d2ac0c0bd76b7556daf27729a1dea2ea3d26a964e12900a0ab64fa604d9f2951c67babebf17b8e6708f5859eac61dfb4c84c
SSDEEP

49152:l0nTo1wZRrV+R1rvoKEnnqCLupYGOFaXkezPU9jD3Wb6+9U0:l0oiRJ+nDoKEnxLupYGOFaXkezPU9jDG

Score

7^/10

upx

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Oem7F7.exe

Executes dropped EXE 2 IoCs

pid	Process
1684	Oem7F7.exe
2540	hhc.exe

Loads dropped DLL 2 IoCs

pid	Process
2460	387d702afc2f944e6c94ce5aea05cfa4.exe
2540	hhc.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2460-0-0x0000000000400000-0x0000000000764000-memory.dmp	upx
behavioral1/memory/2460-16-0x0000000000400000-0x0000000000764000-memory.dmp	upx
behavioral1/memory/2460-41-0x0000000000400000-0x0000000000764000-memory.dmp	upx

Drops file in Program Files directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\MSBuild\MSDKS	hhc.exe
File opened for modification	C:\Program Files (x86)\MSBuild\MSDKS\MSD.chm	hhc.exe
File opened for modification	C:\Program Files (x86)\MSBuild\MSDKS\GBgz.exe	hhc.exe
File created	C:\Program Files (x86)\MSBuild\MSDKS\GBgz.exe	hhc.exe
File opened for modification	C:\Program Files (x86)\MSBuild	hhc.exe
File created	C:\Program Files (x86)\MSBuild\MSDKS\MSD.chm	hhc.exe
File opened for modification	C:\Program Files (x86)\MSBuild\MSDKS\GBgz.exe.manifest	hhc.exe
File created	C:\Program Files (x86)\MSBuild\MSDKS\GBgz.exe.manifest	hhc.exe
File opened for modification	C:\Program Files (x86)\MSBuild\MSDKS\hha.dll	hhc.exe
File created	C:\Program Files (x86)\MSBuild\MSDKS\hha.dll	hhc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2460	387d702afc2f944e6c94ce5aea05cfa4.exe
2460	387d702afc2f944e6c94ce5aea05cfa4.exe
2540	hhc.exe
2540	hhc.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1684	Oem7F7.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeSecurityPrivilege	2460	387d702afc2f944e6c94ce5aea05cfa4.exe
Token: SeDebugPrivilege	2460	387d702afc2f944e6c94ce5aea05cfa4.exe
Token: SeDebugPrivilege	2540	hhc.exe
Token: SeSecurityPrivilege	2540	hhc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2460	387d702afc2f944e6c94ce5aea05cfa4.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2460 wrote to memory of 1684	2460	387d702afc2f944e6c94ce5aea05cfa4.exe	23
PID 2460 wrote to memory of 1684	2460	387d702afc2f944e6c94ce5aea05cfa4.exe	23
PID 2460 wrote to memory of 1684	2460	387d702afc2f944e6c94ce5aea05cfa4.exe	23
PID 2460 wrote to memory of 1684	2460	387d702afc2f944e6c94ce5aea05cfa4.exe	23

C:\Users\Admin\AppData\Local\Temp\387d702afc2f944e6c94ce5aea05cfa4.exe
"C:\Users\Admin\AppData\Local\Temp\387d702afc2f944e6c94ce5aea05cfa4.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2460
- C:\Users\Admin\AppData\Local\Temp\¼¤»î¹¤¾ß\Oem7F7.exe
  C:\Users\Admin\AppData\Local\Temp\¼¤»î¹¤¾ß\Oem7F7.exe
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Suspicious behavior: GetForegroundWindowSpam
  PID:1684

C:\Windows\Temp\unist000\hhc.exe
"C:\Windows\Temp\unist000\hhc.exe" font
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1684-17-0x0000000000400000-0x0000000000680000-memory.dmp

Filesize
2.5MB

Download
memory/1684-10-0x0000000000400000-0x0000000000680000-memory.dmp

Filesize
2.5MB

Download
memory/1684-11-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/1684-28-0x0000000000400000-0x0000000000680000-memory.dmp

Filesize
2.5MB

Download
memory/1684-36-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2460-1-0x0000000010000000-0x000000001001A000-memory.dmp

Filesize
104KB

Download
memory/2460-9-0x0000000002380000-0x0000000002600000-memory.dmp

Filesize
2.5MB

Download
memory/2460-16-0x0000000000400000-0x0000000000764000-memory.dmp

Filesize
3.4MB

Download
memory/2460-0-0x0000000000400000-0x0000000000764000-memory.dmp

Filesize
3.4MB

Download
memory/2460-18-0x0000000002100000-0x0000000002102000-memory.dmp

Filesize
8KB

Download
memory/2460-30-0x0000000002380000-0x0000000002600000-memory.dmp

Filesize
2.5MB

Download
memory/2460-41-0x0000000000400000-0x0000000000764000-memory.dmp

Filesize
3.4MB

Download
memory/2540-26-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

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