modiloader | f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2023, 13:22

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General

Target
Invoice # 78600667766.exe
Size 869KB
Sample230522-ql79fsbd6w
SHA256 f3a3371dbbdf89fca72ec55ee13431692ddb09a0f66e17ee3f2caed32352ab4e
MD5 c220056c58b75cabcdd02a60e77fe6ae
SHA1 243b70253953a398c787905a503c3c9bd27b73c8
SHA512 fcb9b42d2ca03711719e2b7bcb9e33db97bd44f2f7b615d7b0d083f89bd08578728ef35fa6e320966b8d6aeccef964fb3d86fedaaff65df48b931f55b8e8f032
SSDEEP 12288:PiG0CtrZ3HZX+pjqSDTdGluNIAOIQM6PLbHViwW5TpHJxLCRQZUts8NHDU:PiFCr7upjqSg4OIl6dw5Wm85
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

modiloader remcos sky-yak persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

SKY-YAK

www.christopherferr.com:2404

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
12345
mouse_option
false
mutex
Rmc-E68T3F
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

ModiLoader Second Stage 1 IoCs

resource	yara_rule
behavioral2/memory/5032-134-0x0000000002880000-0x00000000028B2000-memory.dmp	modiloader_stage2

Executes dropped EXE 1 IoCs

pid	Process
4860	easinvoker.exe

Loads dropped DLL 1 IoCs

pid	Process
4860	easinvoker.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Gxryidvb = "C:\\Users\\Public\\Libraries\\bvdiyrxG.url"	Invoice # 78600667766.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	xcopy.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	xcopy.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	xcopy.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2224	PING.EXE

Script User-Agent 3 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	15	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	12	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	13	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3144	powershell.exe
3144	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3144	powershell.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 5032 wrote to memory of 640	5032	Invoice # 78600667766.exe	83
PID 5032 wrote to memory of 640	5032	Invoice # 78600667766.exe	83
PID 5032 wrote to memory of 640	5032	Invoice # 78600667766.exe	83
PID 640 wrote to memory of 2212	640	cmd.exe	85
PID 640 wrote to memory of 2212	640	cmd.exe	85
PID 640 wrote to memory of 2212	640	cmd.exe	85
PID 640 wrote to memory of 1548	640	cmd.exe	86
PID 640 wrote to memory of 1548	640	cmd.exe	86
PID 640 wrote to memory of 1548	640	cmd.exe	86
PID 640 wrote to memory of 2152	640	cmd.exe	87
PID 640 wrote to memory of 2152	640	cmd.exe	87
PID 640 wrote to memory of 2152	640	cmd.exe	87
PID 640 wrote to memory of 3052	640	cmd.exe	88
PID 640 wrote to memory of 3052	640	cmd.exe	88
PID 640 wrote to memory of 3052	640	cmd.exe	88
PID 640 wrote to memory of 2076	640	cmd.exe	89
PID 640 wrote to memory of 2076	640	cmd.exe	89
PID 640 wrote to memory of 2076	640	cmd.exe	89
PID 640 wrote to memory of 2120	640	cmd.exe	90
PID 640 wrote to memory of 2120	640	cmd.exe	90
PID 640 wrote to memory of 2120	640	cmd.exe	90
PID 640 wrote to memory of 4860	640	cmd.exe	91
PID 640 wrote to memory of 4860	640	cmd.exe	91
PID 4860 wrote to memory of 4572	4860	easinvoker.exe	92
PID 4860 wrote to memory of 4572	4860	easinvoker.exe	92
PID 640 wrote to memory of 2224	640	cmd.exe	94
PID 640 wrote to memory of 2224	640	cmd.exe	94
PID 640 wrote to memory of 2224	640	cmd.exe	94
PID 4572 wrote to memory of 3144	4572	cmd.exe	95
PID 4572 wrote to memory of 3144	4572	cmd.exe	95
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97
PID 5032 wrote to memory of 1404	5032	Invoice # 78600667766.exe	97

C:\Users\Admin\AppData\Local\Temp\Invoice # 78600667766.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice # 78600667766.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:5032
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\GxryidvbO.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:640
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:2212
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:1548
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:2152
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:3052
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:2076
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:2120
- - C:\Windows \System32\easinvoker.exe
    "C:\Windows \System32\easinvoker.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:4860
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4572
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -WindowStyle Hidden -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3144
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 6
    3⤵
    - Runs ping.exe
    PID:2224
- C:\Windows\SysWOW64\logagent.exe
  "C:\Windows\System32\logagent.exe"
  2⤵
  PID:1404

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

logs.dat

Path C:\ProgramData\12345\logs.dat
Size 144B
SHA256 e2a26df8c3457702035044b1746f1cd674263eb3da9ecfe3d52743155d5baa79
MD5 9d15f5f38935e0e05fb3144a3098914f
SHA1 1a3798a4ff2c3acfc2622001197198c930cb0d48
SHA512 38e981f471ba8172e6ce353a7aaef79e5c4890e0f7a8ed8bf72390711e2315370b77ae890b2615dc72835ff2369e82010b2fa067def5e1428e4903b767516dbb
MD5 SHA1 SHA512

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__PSScriptPolicyTest_l5pe1qf0.b2r.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l5pe1qf0.b2r.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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GxryidvbO.bat

Path C:\Users\Public\Libraries\GxryidvbO.bat
Size 411B
SHA256 5a11c5641c476891aa30e7ecfa57c2639f6827d8640061f73e9afec0adbbd7d2
MD5 55aba243e88f6a6813c117ffe1fa5979
SHA1 210b9b028a4b798c837a182321dbf2e50d112816
SHA512 68009c4c9bbea75a3bfa9f79945d30957a95691ea405d031b4ca7f1cb47504bbc768fcae59173885743ad4d6cfdd2313c3fe0acb515e34e5c809ecdc7f45e307
MD5 SHA1 SHA512

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KDECO.bat

Path C:\Users\Public\Libraries\KDECO.bat
Size 155B
SHA256 37c59c8398279916cfce45f8c5e3431058248f5e3bef4d9f5c0f44a7d564f82e
MD5 213c60adf1c9ef88dc3c9b2d579959d2
SHA1 e4d2ad7b22b1a8b5b1f7a702b303c7364b0ee021
SHA512 fe897d9caa306b0e761b2fd61bb5dc32a53bfaad1ce767c6860af4e3ad59c8f3257228a6e1072dab0f990cb51c59c648084ba419ac6bc5c0a99bdffa569217b7
MD5 SHA1 SHA512

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easinvoker.exe

Path C:\Users\Public\Libraries\easinvoker.exe
Size 128KB
SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
MD5 231ce1e1d7d98b44371ffff407d68b59
SHA1 25510d0f6353dbf0c9f72fc880de7585e34b28ff
SHA512 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612
SSDEEP 3072:zar2xXibKcf5K67+k02XbFbosspwUUgcR:Nibl7+k02XZb9UA
MD5 SHA1 SHA512 SSDEEP

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netutils.dll

Path C:\Users\Public\Libraries\netutils.dll
Size 108KB
SHA256 18d5d6a74199cdff8dab23407dd1a201998b48a780ff621b80bd6066865eb692
MD5 3909f5a6bf09d6fa8d29d69e25fa72f0
SHA1 62f48eb34a8eb4c7e733b8faf9086dc04402b19d
SHA512 a13cf9281a3d447a8dd03bc3134a7a4edd2ddcf2d0a3218d8807a41c3627e476dc62e97ebbf97f75f15940662ea2d5a80cb33344507e5b7d743d1799a6bbbcc9
SSDEEP 1536:QljNHW+8ID3TTy6Xt8amsy1o865jd5w8DdD05Cl7MbiRHRYQ+b:QJxW+P/N8ago865w8DdD0wRYQ+b
MD5 SHA1 SHA512 SSDEEP

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easinvoker.exe

Path C:\Windows \System32\easinvoker.exe
Size 128KB
SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
MD5 231ce1e1d7d98b44371ffff407d68b59
SHA1 25510d0f6353dbf0c9f72fc880de7585e34b28ff
SHA512 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612
SSDEEP 3072:zar2xXibKcf5K67+k02XbFbosspwUUgcR:Nibl7+k02XZb9UA
MD5 SHA1 SHA512 SSDEEP

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easinvoker.exe

Path C:\Windows \System32\easinvoker.exe
Size 128KB
SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
MD5 231ce1e1d7d98b44371ffff407d68b59
SHA1 25510d0f6353dbf0c9f72fc880de7585e34b28ff
SHA512 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612
SSDEEP 3072:zar2xXibKcf5K67+k02XbFbosspwUUgcR:Nibl7+k02XZb9UA
MD5 SHA1 SHA512 SSDEEP

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netutils.dll

Path C:\Windows \System32\netutils.dll
Size 108KB
SHA256 18d5d6a74199cdff8dab23407dd1a201998b48a780ff621b80bd6066865eb692
MD5 3909f5a6bf09d6fa8d29d69e25fa72f0
SHA1 62f48eb34a8eb4c7e733b8faf9086dc04402b19d
SHA512 a13cf9281a3d447a8dd03bc3134a7a4edd2ddcf2d0a3218d8807a41c3627e476dc62e97ebbf97f75f15940662ea2d5a80cb33344507e5b7d743d1799a6bbbcc9
SSDEEP 1536:QljNHW+8ID3TTy6Xt8amsy1o865jd5w8DdD05Cl7MbiRHRYQ+b:QJxW+P/N8ago865w8DdD0wRYQ+b
MD5 SHA1 SHA512 SSDEEP

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netutils.dll

Path C:\Windows \System32\netutils.dll
Size 108KB
SHA256 18d5d6a74199cdff8dab23407dd1a201998b48a780ff621b80bd6066865eb692
MD5 3909f5a6bf09d6fa8d29d69e25fa72f0
SHA1 62f48eb34a8eb4c7e733b8faf9086dc04402b19d
SHA512 a13cf9281a3d447a8dd03bc3134a7a4edd2ddcf2d0a3218d8807a41c3627e476dc62e97ebbf97f75f15940662ea2d5a80cb33344507e5b7d743d1799a6bbbcc9
SSDEEP 1536:QljNHW+8ID3TTy6Xt8amsy1o865jd5w8DdD05Cl7MbiRHRYQ+b:QJxW+P/N8ago865w8DdD0wRYQ+b
MD5 SHA1 SHA512 SSDEEP

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KDECO.bat

Path C:\windows \system32\KDECO.bat
Size 155B
SHA256 37c59c8398279916cfce45f8c5e3431058248f5e3bef4d9f5c0f44a7d564f82e
MD5 213c60adf1c9ef88dc3c9b2d579959d2
SHA1 e4d2ad7b22b1a8b5b1f7a702b303c7364b0ee021
SHA512 fe897d9caa306b0e761b2fd61bb5dc32a53bfaad1ce767c6860af4e3ad59c8f3257228a6e1072dab0f990cb51c59c648084ba419ac6bc5c0a99bdffa569217b7
MD5 SHA1 SHA512

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memory/1404-201-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-193-0x0000000010590000-0x0000000010612000-memory.dmp

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memory/1404-230-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-229-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-222-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-221-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-214-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-179-0x0000000000400000-0x0000000000401000-memory.dmp

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memory/1404-180-0x00000000004C0000-0x00000000004C1000-memory.dmp

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memory/1404-213-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-185-0x0000000000520000-0x0000000000521000-memory.dmp

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memory/1404-187-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-189-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-191-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-192-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-206-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-194-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-195-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-198-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/1404-205-0x00000000020F0000-0x000000000216F000-memory.dmp

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memory/3144-174-0x000001ECF5830000-0x000001ECF5840000-memory.dmp

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memory/3144-170-0x000001ECF5830000-0x000001ECF5840000-memory.dmp

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memory/3144-163-0x000001ECDD560000-0x000001ECDD582000-memory.dmp

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memory/4860-159-0x00000000613C0000-0x00000000613E2000-memory.dmp

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memory/5032-134-0x0000000002880000-0x00000000028B2000-memory.dmp

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memory/5032-133-0x0000000002380000-0x0000000002381000-memory.dmp

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memory/5032-184-0x0000000010590000-0x0000000010612000-memory.dmp

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memory/5032-178-0x0000000010590000-0x0000000010612000-memory.dmp

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memory/5032-136-0x0000000000400000-0x00000000004DF000-memory.dmp

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