d701cb5b78ad384ed221a35e2c03313fa8803ce051104a997786b87ff4c32ea2

Analysis

max time kernel
144s
max time network
152s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07/05/2024, 03:53

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General

Target
6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe
Size 248KB
Sample240507-ef5etsgh3z
SHA256 d701cb5b78ad384ed221a35e2c03313fa8803ce051104a997786b87ff4c32ea2
MD5 6034c4f4fd7240dc2f0331a916a43c00
SHA1 bf49b157864df4e65150b9093bf6d957cf864641
SHA512 65f85460c629ee29c8252a3cb641023e319450032942c034852189cb5480034585ce0981a5cf95491069df4c8cac00df96184ac40e3c1db47dc02ae1ff69d04f
SSDEEP 6144:6lez2ssftlVN+zBfGrSWm+omDAgQsSygGG2SzA9T2:H6silNoGSJ+omDAdsWGLS8k
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit persistence spyware stealer upx

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2980	pjamq.exe

Executes dropped EXE 2 IoCs

pid	Process
2980	pjamq.exe
2884	frnz.exe

Loads dropped DLL 7 IoCs

pid	Process
2184	cmd.exe
2184	cmd.exe
2980	pjamq.exe
2884	frnz.exe
2884	frnz.exe
2884	frnz.exe
2884	frnz.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1152-1-0x0000000000400000-0x000000000047301D-memory.dmp	upx
behavioral1/files/0x000c00000001441e-2.dat	upx
behavioral1/memory/2980-11-0x0000000000400000-0x000000000047301D-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\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\wfl = "c:\\Program Files\\kyazhh\\frnz.exe \"c:\\Program Files\\kyazhh\\frnzk.dll\",WriteErrorLog"	frnz.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\l:	frnz.exe
File opened (read-only)	\??\r:	frnz.exe
File opened (read-only)	\??\y:	frnz.exe
File opened (read-only)	\??\a:	frnz.exe
File opened (read-only)	\??\b:	frnz.exe
File opened (read-only)	\??\j:	frnz.exe
File opened (read-only)	\??\k:	frnz.exe
File opened (read-only)	\??\v:	frnz.exe
File opened (read-only)	\??\x:	frnz.exe
File opened (read-only)	\??\e:	frnz.exe
File opened (read-only)	\??\i:	frnz.exe
File opened (read-only)	\??\m:	frnz.exe
File opened (read-only)	\??\q:	frnz.exe
File opened (read-only)	\??\g:	frnz.exe
File opened (read-only)	\??\h:	frnz.exe
File opened (read-only)	\??\n:	frnz.exe
File opened (read-only)	\??\u:	frnz.exe
File opened (read-only)	\??\w:	frnz.exe
File opened (read-only)	\??\z:	frnz.exe
File opened (read-only)	\??\o:	frnz.exe
File opened (read-only)	\??\p:	frnz.exe
File opened (read-only)	\??\s:	frnz.exe
File opened (read-only)	\??\t:	frnz.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	frnz.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\kyazhh	pjamq.exe
File created	\??\c:\Program Files\kyazhh\frnzk.dll	pjamq.exe
File created	\??\c:\Program Files\kyazhh\frnz.exe	pjamq.exe
File opened for modification	\??\c:\Program Files\kyazhh\frnz.exe	pjamq.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	frnz.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	frnz.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1912	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2884	frnz.exe
2884	frnz.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	frnz.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1152	6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe
2980	pjamq.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 2184	1152	6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe	28
PID 1152 wrote to memory of 2184	1152	6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe	28
PID 1152 wrote to memory of 2184	1152	6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe	28
PID 1152 wrote to memory of 2184	1152	6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe	28
PID 2184 wrote to memory of 1912	2184	cmd.exe	30
PID 2184 wrote to memory of 1912	2184	cmd.exe	30
PID 2184 wrote to memory of 1912	2184	cmd.exe	30
PID 2184 wrote to memory of 1912	2184	cmd.exe	30
PID 2184 wrote to memory of 2980	2184	cmd.exe	31
PID 2184 wrote to memory of 2980	2184	cmd.exe	31
PID 2184 wrote to memory of 2980	2184	cmd.exe	31
PID 2184 wrote to memory of 2980	2184	cmd.exe	31
PID 2980 wrote to memory of 2884	2980	pjamq.exe	32
PID 2980 wrote to memory of 2884	2980	pjamq.exe	32
PID 2980 wrote to memory of 2884	2980	pjamq.exe	32
PID 2980 wrote to memory of 2884	2980	pjamq.exe	32

C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pjamq.exe "C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2184
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:1912
- - C:\Users\Admin\AppData\Local\Temp\pjamq.exe
    C:\Users\Admin\AppData\Local\Temp\\pjamq.exe "C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2980
  - - \??\c:\Program Files\kyazhh\frnz.exe
      "c:\Program Files\kyazhh\frnz.exe" "c:\Program Files\kyazhh\frnzk.dll",WriteErrorLog C:\Users\Admin\AppData\Local\Temp\pjamq.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2884

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

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

frnz.exe

Path \Program Files\kyazhh\frnz.exe
Size 43KB
SHA256 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124
MD5 51138beea3e2c21ec44d0932c71762a8
SHA1 8939cf35447b22dd2c6e6f443446acc1bf986d58
SHA512 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d
SSDEEP 768:mD+ellQvZSazSRqbSEln5IyYpamDjobj8SpM:E+QWvZhSRqln5IUmDjoXV
MD5 SHA1 SHA512 SSDEEP

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frnzk.dll

Path \Program Files\kyazhh\frnzk.dll
Size 181KB
SHA256 7f24733875cc46a27fc695370b068e3fe0502e47e3f30128ee9cbb023f74c2fd
MD5 e4151202a2a65d0d54e26b865c9a944f
SHA1 cf2a08013c3daf99745898a7ff8022ed282fce34
SHA512 5bf41f31b2e44b1f5dbd7d2a78bf56d018e1c3e5a0d633d584f1b6700a96d18fe92343a03acc78c974164a50afaad38268ddd3f0641c930faf78f15342b5dae5
SSDEEP 3072:mVOVK9crNdChBpaHwHjHDgy5fpjUthLI60ttH8Ra4KvqDUhYJ9f6zfvLsSic:gq5dkpaHwH7kyzjUCttH8Ra7vNQoznL5
MD5 SHA1 SHA512 SSDEEP

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pjamq.exe

Path \Users\Admin\AppData\Local\Temp\pjamq.exe
Size 248KB
SHA256 1d5876ec77d1c7c0312cdfb906ee09f3487f084dbcb5d58d72335da169a57d2b
MD5 e9e7d97d53cb3a179131b5f66ccde20c
SHA1 563330ea45a691cda3cb51881302ddaac75a65ad
SHA512 c5728ec35f11d842a13238986a074ba75f6b01d39f38887b57ba427417f0e44a3799d3fd6a224a57f8d2ca8a860635ad3dbc41be6a575f931bd81e56dfde9ae3
SSDEEP 6144:6lez2ssftlVN+zBfGrSWm+omDAgQsSygGG2SzA9TnD:H6silNoGSJ+omDAdsWGLS8RD
MD5 SHA1 SHA512 SSDEEP

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memory/1152-1-0x0000000000400000-0x000000000047301D-memory.dmp

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memory/2884-23-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-18-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-22-0x0000000000130000-0x0000000000132000-memory.dmp

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memory/2884-25-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-27-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-29-0x0000000000130000-0x0000000000132000-memory.dmp

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memory/2884-32-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2884-36-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/2980-11-0x0000000000400000-0x000000000047301D-memory.dmp

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