99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36

General

Target

99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe
Size

92KB
MD5

aa0309f312fabff45c637ea7b15a6746
SHA1

49dceca4afbc66a45168859737c6cef2b7712fa9
SHA256

99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36
SHA512

5a881f85eca17d82345281069a20c52df4493da5ce7c7a6642c3332c173054dbacbc58533dc96053e01aa47316685d7fd17dc3f75691cf842893db2ea04b1283
SSDEEP

1536:R7PvnKhWQtC3Izj6TrlDa2z6Ewd0zvPTQw9LBZRQ8V3zhb:hPvKztiIzj6xtDLBZRQ8Vj5

Score

9^/10

Malware Config

Signatures

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral1/files/0x0034000000016122-2.dat	INDICATOR_EXE_Packed_eXPressor
behavioral1/memory/2044-12-0x0000000013150000-0x0000000013167000-memory.dmp	INDICATOR_EXE_Packed_eXPressor

Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{CFF8FD86-05DB-4990-92A9-0EE5FDFB7BFE}\stubpath = "C:\\Windows\\system32\\WinHelp85.exe"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{CFF8FD86-05DB-4990-92A9-0EE5FDFB7BFE}	regedit.exe

Deletes itself 1 IoCs

pid	Process
2724	WinHelp85.exe

Executes dropped EXE 1 IoCs

pid	Process
2724	WinHelp85.exe

Loads dropped DLL 2 IoCs

pid	Process
3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe
3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\WinHelp85.exe	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe

Runs .reg file with regedit 1 IoCs

pid	Process
2872	regedit.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2724	WinHelp85.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2872	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	28
PID 3040 wrote to memory of 2872	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	28
PID 3040 wrote to memory of 2872	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	28
PID 3040 wrote to memory of 2872	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	28
PID 3040 wrote to memory of 2724	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	29
PID 3040 wrote to memory of 2724	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	29
PID 3040 wrote to memory of 2724	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	29
PID 3040 wrote to memory of 2724	3040	99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe	29
PID 2724 wrote to memory of 2044	2724	WinHelp85.exe	30
PID 2724 wrote to memory of 2044	2724	WinHelp85.exe	30
PID 2724 wrote to memory of 2044	2724	WinHelp85.exe	30
PID 2724 wrote to memory of 2044	2724	WinHelp85.exe	30
PID 2724 wrote to memory of 2044	2724	WinHelp85.exe	30

C:\Users\Admin\AppData\Local\Temp\99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe
"C:\Users\Admin\AppData\Local\Temp\99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Windows\SysWOW64\regedit.exe
  regedit.exe /s C:\Users\Admin\AppData\Local\Temp\259399585.reg
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Runs .reg file with regedit
  PID:2872
- C:\Windows\SysWOW64\WinHelp85.exe
  C:\Windows\system32\WinHelp85.exe kowdgjttgC:\Users\Admin\AppData\Local\Temp\99318921262d6b3856b953ee7f645045d1cea4003ac4f6668253b51c79d50e36.exe
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2724
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\system32\svchost.exe
    3⤵
    PID:2044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Active Setup

1

T1547.014

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\259399585.reg

Filesize
384B

MD5
ab40dcd38d384995cac67aaa7d988438

SHA1
9a79887df54e359e6b8ed6de3dae122f0e88ee12

SHA256
99d34009a80e74b612ce8e09a910394e905aead8b622365e50c83d690e1439f0

SHA512
c68526a36b959df6cb4a3b4f49cd642b7786c202cb063cafff7c9dec0751abd44e00f717d33ec0fdcdc6dc465f657ca66b8546027597557dc1b36e7d9b4cdc5e

Download Submit
\Windows\SysWOW64\WinHelp85.exe

Filesize
92KB

MD5
e4e8c41a704ce64f6cfafd95e46a0131

SHA1
ef2524da1f6249e19ffb6a85cf3e87aed360d664

SHA256
44f6b54bda1b95b04aefaaaf5b0106e85bc6bfdceed3fc2bf1e4cd3bbc46865f

SHA512
5c7f1f48f3dccb7271c63439a6f9195a4d437894eefee4991a3379ef2165cda494e1659de39a7d5fc7c7bed8cac37d807d368445bdd9019623f4fe0750c8d8b9

Download Submit
memory/2044-12-0x0000000013150000-0x0000000013167000-memory.dmp

Filesize
92KB

Download
memory/2044-10-0x0000000013150000-0x0000000013167000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads