d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757

General

Target

d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe
Size

56KB
MD5

169c85a44976f7feff6402ffcd0ce209
SHA1

f8b39e73117d494d511d9cb3e694c07ba109a97b
SHA256

d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757
SHA512

ab8ac39f34af5980f2cf0fe23130b380a247592c558adca178082fc4398ce99a2c4cecb00285ae8c5fca2d08081096aff5cc4c4eb8db67dfb18c435eaba003f8
SSDEEP

768:hFYThrPE0fq2Gh/HBz5AOqVAMwgcVyx9GPxBWrlaOV4eLTOndPeN4OKtHIjVqOmr:cThc1h7qVAMwJyxM3WaPeLqdPeNstAXs

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1796	System64.exe

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{7890g421-b1gf-14d0-89bb-0090ce808e85}	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{7890g421-b1gf-14d0-89bb-0090ce808e85}\StubPath = "C:\\Windows\\system32\\System64.exe"	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1684-132-0x0000000000400000-0x000000000042A200-memory.dmp	upx
behavioral2/memory/1684-133-0x0000000000400000-0x000000000042A200-memory.dmp	upx
behavioral2/files/0x000c000000022f59-135.dat	upx
behavioral2/files/0x000c000000022f59-136.dat	upx
behavioral2/files/0x000c000000022f59-137.dat	upx
behavioral2/files/0x000c000000022f59-138.dat	upx
behavioral2/memory/1684-139-0x0000000000400000-0x000000000042A200-memory.dmp	upx
behavioral2/memory/4944-141-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral2/memory/4944-144-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral2/memory/4944-143-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral2/memory/4944-142-0x0000000000400000-0x000000000042B000-memory.dmp	upx
behavioral2/memory/1796-146-0x0000000000400000-0x000000000042A200-memory.dmp	upx

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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe

Loads dropped DLL 2 IoCs

pid	Process
1796	System64.exe
1796	System64.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\System64.exe	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe
File opened for modification	C:\Windows\SysWOW64\System64.exe	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1796 set thread context of 4944	1796	System64.exe	79

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1012	4944	WerFault.exe	79

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1796	System64.exe
1796	System64.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 1796	1684	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe	78
PID 1684 wrote to memory of 1796	1684	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe	78
PID 1684 wrote to memory of 1796	1684	d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe	78
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79
PID 1796 wrote to memory of 4944	1796	System64.exe	79

C:\Users\Admin\AppData\Local\Temp\d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe
"C:\Users\Admin\AppData\Local\Temp\d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757.exe"
1⤵
- Modifies Installed Components in the registry
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\SysWOW64\System64.exe
  "C:\Windows\system32\System64.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1796
- - C:\Windows\SysWOW64\userinit.exe
    "C:\Windows\system32\userinit.exe"
    3⤵
    PID:4944
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4944 -s 12
      4⤵
      Program crash
      PID:1012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4944 -ip 4944
1⤵
PID:4892

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\System64.exe

Filesize
56KB

MD5
169c85a44976f7feff6402ffcd0ce209

SHA1
f8b39e73117d494d511d9cb3e694c07ba109a97b

SHA256
d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757

SHA512
ab8ac39f34af5980f2cf0fe23130b380a247592c558adca178082fc4398ce99a2c4cecb00285ae8c5fca2d08081096aff5cc4c4eb8db67dfb18c435eaba003f8

Download Submit
C:\Windows\SysWOW64\System64.exe

Filesize
56KB

MD5
169c85a44976f7feff6402ffcd0ce209

SHA1
f8b39e73117d494d511d9cb3e694c07ba109a97b

SHA256
d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757

SHA512
ab8ac39f34af5980f2cf0fe23130b380a247592c558adca178082fc4398ce99a2c4cecb00285ae8c5fca2d08081096aff5cc4c4eb8db67dfb18c435eaba003f8

Download Submit
C:\Windows\SysWOW64\System64.exe

Filesize
56KB

MD5
169c85a44976f7feff6402ffcd0ce209

SHA1
f8b39e73117d494d511d9cb3e694c07ba109a97b

SHA256
d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757

SHA512
ab8ac39f34af5980f2cf0fe23130b380a247592c558adca178082fc4398ce99a2c4cecb00285ae8c5fca2d08081096aff5cc4c4eb8db67dfb18c435eaba003f8

Download Submit
C:\Windows\SysWOW64\System64.exe

Filesize
56KB

MD5
169c85a44976f7feff6402ffcd0ce209

SHA1
f8b39e73117d494d511d9cb3e694c07ba109a97b

SHA256
d041b285dedc222dce5607c877081f8163d264c68a1d436c4c163dc002aa1757

SHA512
ab8ac39f34af5980f2cf0fe23130b380a247592c558adca178082fc4398ce99a2c4cecb00285ae8c5fca2d08081096aff5cc4c4eb8db67dfb18c435eaba003f8

Download Submit
memory/1684-133-0x0000000000400000-0x000000000042A200-memory.dmp

Filesize
168KB

Download
memory/1684-132-0x0000000000400000-0x000000000042A200-memory.dmp

Filesize
168KB

Download
memory/1684-139-0x0000000000400000-0x000000000042A200-memory.dmp

Filesize
168KB

Download
memory/1796-146-0x0000000000400000-0x000000000042A200-memory.dmp

Filesize
168KB

Download
memory/4944-141-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4944-144-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4944-143-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4944-142-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download

Analysis

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