61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d

General

Target

61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe
Size

135KB
MD5

efd19fee38778e4354703e345a5ac916
SHA1

8e093d7cc721e244128a6a08e6f8ff5326c3b5c9
SHA256

61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d
SHA512

ae49635fd89cc010303e2406dfd40863f62357ee544040dcb3fd49c5fed0bfeb0347d54bd5aa62b1309ea2c87ad2aea19e3096b0952ca2590d715de9abdaffeb
SSDEEP

1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOd:YfU/WF6QMauSuiWNi9eNOl0007NZIOd

Score

7^/10

defense_evasion discovery persistence upx

Malware Config

Signatures

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-1-5-21-3078542121-369484597-920690335-1000\Control Panel\International\Geo\Nation	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe

Executes dropped EXE 2 IoCs

pid	Process
3944	wuauclt.exe
2364	wuauclt.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Window Update = "\"C:\\ProgramData\\Update\\wuauclt.exe\" /run"	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1192-0-0x00000000007B0000-0x00000000007D8000-memory.dmp	upx
behavioral1/files/0x0008000000024259-3.dat	upx
behavioral1/memory/3944-5-0x0000000000E50000-0x0000000000E78000-memory.dmp	upx
behavioral1/memory/2364-7-0x0000000000E50000-0x0000000000E78000-memory.dmp	upx
behavioral1/memory/1192-8-0x00000000007B0000-0x00000000007D8000-memory.dmp	upx
behavioral1/memory/3944-9-0x0000000000E50000-0x0000000000E78000-memory.dmp	upx
behavioral1/memory/1192-10-0x00000000007B0000-0x00000000007D8000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wuauclt.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 3944	1192	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe	87
PID 1192 wrote to memory of 3944	1192	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe	87
PID 1192 wrote to memory of 3944	1192	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe	87
PID 3428 wrote to memory of 2364	3428	cmd.exe	89
PID 3428 wrote to memory of 2364	3428	cmd.exe	89
PID 3428 wrote to memory of 2364	3428	cmd.exe	89
PID 1192 wrote to memory of 5276	1192	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe	94
PID 1192 wrote to memory of 5276	1192	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe	94
PID 1192 wrote to memory of 5276	1192	61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe	94

C:\Users\Admin\AppData\Local\Temp\61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe
"C:\Users\Admin\AppData\Local\Temp\61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1192
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3944
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\61d37531c36e5fbda82cbc1fa7008fd41feb3029a84fa64a593dc7463bd3072d.exe" >> NUL
  2⤵
  - System Location Discovery: System Language Discovery
  PID:5276

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\ProgramData\Update\wuauclt.exe" /run
1⤵
- Suspicious use of WriteProcessMemory
PID:3428
- C:\ProgramData\Update\wuauclt.exe
  C:\ProgramData\Update\wuauclt.exe /run
  2⤵
  - Executes dropped EXE
  PID:2364

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Update\wuauclt.exe

Filesize
135KB

MD5
9e2e77c1f0b52a06ae52b9f6f3bd88f1

SHA1
5137eb7dcc0fb94f43addbf96f75000dfc48f73f

SHA256
e816500bb85d02ae4c7f6b61e91506260b9906c7b00ebad6824baa8bc10e19ad

SHA512
e3db63f533520d35f4ca59cee8d8d4d4e08c6997a1ddfe85e988cfdb1ff0e46d3010f2d9a85cf34b2aff5548f5e8961e3dfd03872dbd41460ed214f60ec766bf

Download Submit
memory/1192-0-0x00000000007B0000-0x00000000007D8000-memory.dmp

Filesize
160KB

Download
memory/1192-8-0x00000000007B0000-0x00000000007D8000-memory.dmp

Filesize
160KB

Download
memory/1192-10-0x00000000007B0000-0x00000000007D8000-memory.dmp

Filesize
160KB

Download
memory/2364-7-0x0000000000E50000-0x0000000000E78000-memory.dmp

Filesize
160KB

Download
memory/3944-5-0x0000000000E50000-0x0000000000E78000-memory.dmp

Filesize
160KB

Download
memory/3944-9-0x0000000000E50000-0x0000000000E78000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads