Analysis
-
max time kernel
151s -
max time network
149s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
20-10-2021 12:29
Static task
static1
Behavioral task
behavioral1
Sample
PROFORMA INVOICE20211018.xlxs.exe
Resource
win7-en-20210920
General
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Target
PROFORMA INVOICE20211018.xlxs.exe
-
Size
760KB
-
MD5
3ec71d8b38605e11dfae1893bf96442a
-
SHA1
9f9a1e1a7cc646edb4be2dc133e9649b8443e842
-
SHA256
ef5dfc63e13d3e5262051a36bd7eaa218c828274fe27cf5cf1a7ea39a283d093
-
SHA512
fc91312c82e054c9e9464273853aa37214737d3ac3bd4c1ac922b1acb6516ea5d085ccb1a120199e53ee0b7e1f06dca0f411f6355f8f2d041f67f3d5afca2c70
Malware Config
Extracted
nanocore
1.2.2.0
185.19.85.137:7020
88b0125e-e46f-4954-ad2f-4e6855c94d7d
-
activate_away_mode
true
-
backup_connection_host
185.19.85.137
- backup_dns_server
-
buffer_size
65535
-
build_time
2021-07-24T03:28:09.410240436Z
-
bypass_user_account_control
false
-
bypass_user_account_control_data
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
-
clear_access_control
true
-
clear_zone_identifier
true
-
connect_delay
4000
-
connection_port
7020
-
default_group
NEW FILE
-
enable_debug_mode
true
-
gc_threshold
1.048576e+07
-
keep_alive_timeout
30000
-
keyboard_logging
false
-
lan_timeout
2500
-
max_packet_size
1.048576e+07
-
mutex
88b0125e-e46f-4954-ad2f-4e6855c94d7d
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
185.19.85.137
- primary_dns_server
-
request_elevation
true
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
false
-
set_critical_process
true
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8000
Signatures
-
Executes dropped EXE 2 IoCs
Processes:
A.exeInstallUtil.exepid process 1016 A.exe 3540 InstallUtil.exe -
Obfuscated with Agile.Net obfuscator 1 IoCs
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
Processes:
resource yara_rule behavioral2/memory/1420-120-0x0000000005380000-0x00000000053A1000-memory.dmp agile_net -
Adds Run key to start application 2 TTPs 3 IoCs
Processes:
reg.exeInstallUtil.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows\CurrentVersion\Run\A = "C:\\Users\\Admin\\AppData\\Roaming\\A.exe" reg.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Manager = "C:\\Program Files (x86)\\SMTP Manager\\smtpmgr.exe" InstallUtil.exe -
Processes:
InstallUtil.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA InstallUtil.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
A.exedescription pid process target process PID 1016 set thread context of 3540 1016 A.exe InstallUtil.exe -
Drops file in Program Files directory 2 IoCs
Processes:
InstallUtil.exedescription ioc process File created C:\Program Files (x86)\SMTP Manager\smtpmgr.exe InstallUtil.exe File opened for modification C:\Program Files (x86)\SMTP Manager\smtpmgr.exe InstallUtil.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
-
Suspicious behavior: EnumeratesProcesses 20 IoCs
Processes:
PROFORMA INVOICE20211018.xlxs.exeA.exeInstallUtil.exepid process 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1420 PROFORMA INVOICE20211018.xlxs.exe 1016 A.exe 1016 A.exe 3540 InstallUtil.exe 3540 InstallUtil.exe 3540 InstallUtil.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
InstallUtil.exepid process 3540 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
PROFORMA INVOICE20211018.xlxs.exeA.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 1420 PROFORMA INVOICE20211018.xlxs.exe Token: SeDebugPrivilege 1016 A.exe Token: SeDebugPrivilege 3540 InstallUtil.exe -
Suspicious use of WriteProcessMemory 23 IoCs
Processes:
PROFORMA INVOICE20211018.xlxs.execmd.exeA.exeInstallUtil.exedescription pid process target process PID 1420 wrote to memory of 2256 1420 PROFORMA INVOICE20211018.xlxs.exe cmd.exe PID 1420 wrote to memory of 2256 1420 PROFORMA INVOICE20211018.xlxs.exe cmd.exe PID 1420 wrote to memory of 2256 1420 PROFORMA INVOICE20211018.xlxs.exe cmd.exe PID 2256 wrote to memory of 3140 2256 cmd.exe reg.exe PID 2256 wrote to memory of 3140 2256 cmd.exe reg.exe PID 2256 wrote to memory of 3140 2256 cmd.exe reg.exe PID 1420 wrote to memory of 1016 1420 PROFORMA INVOICE20211018.xlxs.exe A.exe PID 1420 wrote to memory of 1016 1420 PROFORMA INVOICE20211018.xlxs.exe A.exe PID 1420 wrote to memory of 1016 1420 PROFORMA INVOICE20211018.xlxs.exe A.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 1016 wrote to memory of 3540 1016 A.exe InstallUtil.exe PID 3540 wrote to memory of 3720 3540 InstallUtil.exe schtasks.exe PID 3540 wrote to memory of 3720 3540 InstallUtil.exe schtasks.exe PID 3540 wrote to memory of 3720 3540 InstallUtil.exe schtasks.exe PID 3540 wrote to memory of 652 3540 InstallUtil.exe schtasks.exe PID 3540 wrote to memory of 652 3540 InstallUtil.exe schtasks.exe PID 3540 wrote to memory of 652 3540 InstallUtil.exe schtasks.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE20211018.xlxs.exe"C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE20211018.xlxs.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "A" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\A.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "A" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\A.exe"3⤵
- Adds Run key to start application
-
C:\Users\Admin\AppData\Roaming\A.exe"C:\Users\Admin\AppData\Roaming\A.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "SMTP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1F1D.tmp"4⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "SMTP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp20B4.tmp"4⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Local\Temp\tmp1F1D.tmpMD5
f7eb19c49b51cdff67a25c6876a78241
SHA16d86be501c2fb57b50292a55d3983b7eee8a688d
SHA256c9dab73a0044021d2acbc3952b19dea98cdfd838afc633197bd1bd12d2562fba
SHA5121e94e363f9d4d0dcdfe0a8457642fcfe4f81dff0b39f1d1f00deab9291e133cd40b48c097dfe52c356d4a15c383e0aa08fae28b136937bcc57d5e01861716740
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C:\Users\Admin\AppData\Local\Temp\tmp20B4.tmpMD5
b3b017f9df206021717a11f11d895402
SHA1e4ea12823af6550ee634536eec1eb14490580a3b
SHA256654dfce2c28024364e679e1b958f3fb81fc6d29685d534d905d1c83a84351024
SHA51295666cb81aa1fd1ade04a32f63381ce8bff274d7d300c0b59cbb10a294c4d1eebaa3000365a2000b38793de030044995cf23e623c5e3648d9b00501f97ff9343
-
C:\Users\Admin\AppData\Roaming\A.exeMD5
3ec71d8b38605e11dfae1893bf96442a
SHA19f9a1e1a7cc646edb4be2dc133e9649b8443e842
SHA256ef5dfc63e13d3e5262051a36bd7eaa218c828274fe27cf5cf1a7ea39a283d093
SHA512fc91312c82e054c9e9464273853aa37214737d3ac3bd4c1ac922b1acb6516ea5d085ccb1a120199e53ee0b7e1f06dca0f411f6355f8f2d041f67f3d5afca2c70
-
C:\Users\Admin\AppData\Roaming\A.exeMD5
3ec71d8b38605e11dfae1893bf96442a
SHA19f9a1e1a7cc646edb4be2dc133e9649b8443e842
SHA256ef5dfc63e13d3e5262051a36bd7eaa218c828274fe27cf5cf1a7ea39a283d093
SHA512fc91312c82e054c9e9464273853aa37214737d3ac3bd4c1ac922b1acb6516ea5d085ccb1a120199e53ee0b7e1f06dca0f411f6355f8f2d041f67f3d5afca2c70
-
memory/652-155-0x0000000000000000-mapping.dmp
-
memory/1016-141-0x0000000007100000-0x0000000007101000-memory.dmpFilesize
4KB
-
memory/1016-140-0x00000000070F0000-0x00000000070FB000-memory.dmpFilesize
44KB
-
memory/1016-139-0x00000000059E1000-0x00000000059E2000-memory.dmpFilesize
4KB
-
memory/1016-134-0x00000000059E0000-0x00000000059E1000-memory.dmpFilesize
4KB
-
memory/1016-127-0x0000000000000000-mapping.dmp
-
memory/1420-121-0x0000000005D20000-0x0000000005D21000-memory.dmpFilesize
4KB
-
memory/1420-126-0x00000000053B1000-0x00000000053B2000-memory.dmpFilesize
4KB
-
memory/1420-115-0x0000000000330000-0x0000000000331000-memory.dmpFilesize
4KB
-
memory/1420-123-0x0000000005F30000-0x0000000005F31000-memory.dmpFilesize
4KB
-
memory/1420-122-0x0000000005CF0000-0x0000000005CF1000-memory.dmpFilesize
4KB
-
memory/1420-120-0x0000000005380000-0x00000000053A1000-memory.dmpFilesize
132KB
-
memory/1420-119-0x00000000053B0000-0x00000000053B1000-memory.dmpFilesize
4KB
-
memory/1420-118-0x0000000004D60000-0x0000000004D61000-memory.dmpFilesize
4KB
-
memory/1420-117-0x0000000004E80000-0x0000000004E81000-memory.dmpFilesize
4KB
-
memory/2256-124-0x0000000000000000-mapping.dmp
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memory/3140-125-0x0000000000000000-mapping.dmp
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memory/3540-148-0x0000000005340000-0x0000000005341000-memory.dmpFilesize
4KB
-
memory/3540-151-0x0000000004E40000-0x0000000004E41000-memory.dmpFilesize
4KB
-
memory/3540-152-0x0000000004E40000-0x000000000533E000-memory.dmpFilesize
5.0MB
-
memory/3540-143-0x000000000041E792-mapping.dmp
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memory/3540-142-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/3540-157-0x0000000004ED0000-0x0000000004ED5000-memory.dmpFilesize
20KB
-
memory/3540-158-0x0000000005EB0000-0x0000000005EC9000-memory.dmpFilesize
100KB
-
memory/3540-159-0x0000000005FD0000-0x0000000005FD3000-memory.dmpFilesize
12KB
-
memory/3720-153-0x0000000000000000-mapping.dmp