b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1

General

Target

b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe
Size

134KB
MD5

f48acbbb5d3d3e61502a01769f4ad153
SHA1

3359226c1186dca08b90011d43c8018cc1030891
SHA256

b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1
SHA512

7128242bd0de42560ad67695017b4b7911134b96096dfe2bbc1c4167d979592d0dd5492601bd2847ae3c3befbd0adbcfb8679eff29328be68125d79422df66db
SSDEEP

1536:YGYU/W2/HG6QMauSV3ixJHABLrmhH7i9eNOOg00GqMIK7aGZh3SOO:YfU/WF6QMauSuiWNi9eNOl0007NZIOO

Score

9^/10

Malware Config

Signatures

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/2236-0-0x0000000001090000-0x00000000010B8000-memory.dmp	UPX
behavioral1/memory/2184-6-0x0000000000200000-0x0000000000228000-memory.dmp	UPX
behavioral1/files/0x00310000000144d6-5.dat	UPX
behavioral1/memory/2236-7-0x0000000001090000-0x00000000010B8000-memory.dmp	UPX
behavioral1/memory/2184-9-0x0000000000200000-0x0000000000228000-memory.dmp	UPX
behavioral1/memory/2236-10-0x0000000001090000-0x00000000010B8000-memory.dmp	UPX

Deletes itself 1 IoCs

pid	Process
2288	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2184	wuauclt.exe

Loads dropped DLL 1 IoCs

pid	Process
2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2236-0-0x0000000001090000-0x00000000010B8000-memory.dmp	upx
behavioral1/memory/2184-6-0x0000000000200000-0x0000000000228000-memory.dmp	upx
behavioral1/files/0x00310000000144d6-5.dat	upx
behavioral1/memory/2236-7-0x0000000001090000-0x00000000010B8000-memory.dmp	upx
behavioral1/memory/2184-9-0x0000000000200000-0x0000000000228000-memory.dmp	upx
behavioral1/memory/2236-10-0x0000000001090000-0x00000000010B8000-memory.dmp	upx

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"	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2184	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	28
PID 2236 wrote to memory of 2184	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	28
PID 2236 wrote to memory of 2184	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	28
PID 2236 wrote to memory of 2184	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	28
PID 2236 wrote to memory of 2288	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	29
PID 2236 wrote to memory of 2288	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	29
PID 2236 wrote to memory of 2288	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	29
PID 2236 wrote to memory of 2288	2236	b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe	29

C:\Users\Admin\AppData\Local\Temp\b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe
"C:\Users\Admin\AppData\Local\Temp\b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2236
- C:\ProgramData\Update\wuauclt.exe
  "C:\ProgramData\Update\wuauclt.exe" /run
  2⤵
  - Executes dropped EXE
  PID:2184
- C:\windows\SysWOW64\cmd.exe
  "C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\b1cb9f3d2ac7a954ea759051df9eab5812d3c838947066fcf971ece0a28826a1.exe" >> NUL
  2⤵
  - Deletes itself
  PID:2288

Network

MITRE ATT&CK Enterprise v15

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

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Update\wuauclt.exe

Filesize
134KB

MD5
f92c93f30896f3c02813aad7a664682d

SHA1
510455d0b877f82546e5872685dce120c7600f66

SHA256
7b1bf756f8dd9d8d5613809071e13c44c50dacc1793d045d5e9bbb740bd94bd2

SHA512
a6e913f6fe290bca3aceec1d777d586e59ec2def9da8160902da7e9985fad63834df4f829860e6d61af7d3f4b2fbe2014184f88ea89b724847b8374b090afe17

Download Submit
memory/2184-6-0x0000000000200000-0x0000000000228000-memory.dmp

Filesize
160KB

Download
memory/2184-9-0x0000000000200000-0x0000000000228000-memory.dmp

Filesize
160KB

Download
memory/2236-0-0x0000000001090000-0x00000000010B8000-memory.dmp

Filesize
160KB

Download
memory/2236-7-0x0000000001090000-0x00000000010B8000-memory.dmp

Filesize
160KB

Download
memory/2236-8-0x0000000000230000-0x0000000000258000-memory.dmp

Filesize
160KB

Download
memory/2236-10-0x0000000001090000-0x00000000010B8000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads