97f6000c5473c9a9c7499fc09faa85978c138326551b8b4bb512d3ea7241fda4

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
08-07-2024 14:01

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General

Target

17510883e112fb817eb60eda9bf9cd40N.exe
Size

484KB
MD5

17510883e112fb817eb60eda9bf9cd40
SHA1

d2cb43908af542534dd5722e882a29867908bbf0
SHA256

97f6000c5473c9a9c7499fc09faa85978c138326551b8b4bb512d3ea7241fda4
SHA512

01a441ee2f8ce2653aaf98dae32cb7c8edc46f035591aef0795917fe9fdf2b01a71bcafad54d96e060685f97aba4caecb7af16c346856dc26e1943be3212002e
SSDEEP

12288:kLPkCDt1EG2XVekhdeTi0TrAFQMTB6WP5sFVm2tV:kLPkQ1bqA603AOaB6WOVp

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 3 IoCs

pid	Process
2696	taskutil.exe
2760	RMAchost.exe
2692	~1094.tmp

Loads dropped DLL 3 IoCs

pid	Process
2220	17510883e112fb817eb60eda9bf9cd40N.exe
2220	17510883e112fb817eb60eda9bf9cd40N.exe
2696	taskutil.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\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\mspall32 = "C:\\Users\\Admin\\AppData\\Roaming\\bthucalc\\taskutil.exe"	17510883e112fb817eb60eda9bf9cd40N.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\RMAchost.exe	17510883e112fb817eb60eda9bf9cd40N.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
640	2220	WerFault.exe	29

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2696	taskutil.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE
2760	RMAchost.exe
1200	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2696	taskutil.exe
Token: SeShutdownPrivilege	1200	Explorer.EXE

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2696	2220	17510883e112fb817eb60eda9bf9cd40N.exe	30
PID 2220 wrote to memory of 2696	2220	17510883e112fb817eb60eda9bf9cd40N.exe	30
PID 2220 wrote to memory of 2696	2220	17510883e112fb817eb60eda9bf9cd40N.exe	30
PID 2220 wrote to memory of 2696	2220	17510883e112fb817eb60eda9bf9cd40N.exe	30
PID 2696 wrote to memory of 2692	2696	taskutil.exe	32
PID 2696 wrote to memory of 2692	2696	taskutil.exe	32
PID 2696 wrote to memory of 2692	2696	taskutil.exe	32
PID 2696 wrote to memory of 2692	2696	taskutil.exe	32
PID 2692 wrote to memory of 1200	2692	~1094.tmp	21
PID 2220 wrote to memory of 640	2220	17510883e112fb817eb60eda9bf9cd40N.exe	33
PID 2220 wrote to memory of 640	2220	17510883e112fb817eb60eda9bf9cd40N.exe	33
PID 2220 wrote to memory of 640	2220	17510883e112fb817eb60eda9bf9cd40N.exe	33
PID 2220 wrote to memory of 640	2220	17510883e112fb817eb60eda9bf9cd40N.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1200
- C:\Users\Admin\AppData\Local\Temp\17510883e112fb817eb60eda9bf9cd40N.exe
  "C:\Users\Admin\AppData\Local\Temp\17510883e112fb817eb60eda9bf9cd40N.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2220
- - C:\Users\Admin\AppData\Roaming\bthucalc\taskutil.exe
    "C:\Users\Admin\AppData\Roaming\bthucalc"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2696
  - - C:\Users\Admin\AppData\Local\Temp\~1094.tmp
      1200 496136 2696 1
      4⤵
      Executes dropped EXE
      Suspicious use of WriteProcessMemory
      PID:2692
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2220 -s 252
    3⤵
    - Program crash
    PID:640

C:\Windows\SysWOW64\RMAchost.exe
C:\Windows\SysWOW64\RMAchost.exe -s
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\~1094.tmp

Filesize
8KB

MD5
aac3165ece2959f39ff98334618d10d9

SHA1
020a191bfdc70c1fbd3bf74cd7479258bd197f51

SHA256
96fa6a7714670823c83099ea01d24d6d3ae8fef027f01a4ddac14f123b1c9974

SHA512
9eb876812a6a13dd4b090788c2b1d9e9a2e25370598ed5c040f82e6f378edc4b78d58bc8f60d5a559ea57b1edcf3a144bfe09454a9928997173db8279d5b40cf

Download Submit
\Users\Admin\AppData\Roaming\bthucalc\taskutil.exe

Filesize
484KB

MD5
a1a15bdeaa4e71aa398c0eea295b7ceb

SHA1
b973a08f3362245de8c80463dad9661406559ec8

SHA256
f5875cfef20479c3514212a75b8af6e3797a8cbcfd4fa6e5b81d65b5fd31ed0a

SHA512
a64e409249415fa0636b287324274576e3486cec20b46d581d688e059424ba36692e86125814067678e5b0e8c7bdab3c8a4814f5f1c549f93a02705e9abe50bd

Download Submit
memory/1200-29-0x0000000004610000-0x0000000004699000-memory.dmp

Filesize
548KB

Download
memory/1200-17-0x0000000004610000-0x0000000004699000-memory.dmp

Filesize
548KB

Download
memory/1200-28-0x00000000025A0000-0x00000000025AD000-memory.dmp

Filesize
52KB

Download
memory/1200-27-0x0000000002530000-0x0000000002536000-memory.dmp

Filesize
24KB

Download
memory/1200-18-0x0000000004610000-0x0000000004699000-memory.dmp

Filesize
548KB

Download
memory/2220-35-0x0000000000390000-0x0000000000413000-memory.dmp

Filesize
524KB

Download
memory/2220-0-0x0000000000390000-0x0000000000413000-memory.dmp

Filesize
524KB

Download
memory/2696-20-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/2696-11-0x0000000000160000-0x00000000001E3000-memory.dmp

Filesize
524KB

Download
memory/2760-31-0x0000000000180000-0x0000000000186000-memory.dmp

Filesize
24KB

Download
memory/2760-34-0x0000000000180000-0x0000000000186000-memory.dmp

Filesize
24KB

Download
memory/2760-30-0x00000000000E0000-0x0000000000163000-memory.dmp

Filesize
524KB

Download
memory/2760-33-0x0000000000190000-0x0000000000196000-memory.dmp

Filesize
24KB

Download
memory/2760-36-0x0000000000180000-0x0000000000186000-memory.dmp

Filesize
24KB

Download