hijackloader | e483ca3bc78e49f0ceef3406ea963101fe1d2b08b4bace6945ac9298222b8c37

General

Target

Slf.msi
Size

3.0MB
MD5

da2c2debc2177026f359f4f06db67ea2
SHA1

c9b0cb497058b925ecb430d0e29d16fd0ca273a4
SHA256

e483ca3bc78e49f0ceef3406ea963101fe1d2b08b4bace6945ac9298222b8c37
SHA512

9885d2dbec4e3599862fc76c56773de56944adfa09322b7c401550dcfbaa49e95bdf27daf1515873fdc9a4c56ad6ab8195e6b9556afc8e3488401174a5203f5d
SSDEEP

49152:Ch4L8r6F5mCmR+XuhqZL+H9IyKficUAG595WpZsNAaudSIu:Fo6NZLSIX6cZGZWUNAaud

Score

10^/10

hijackloader remcos v2 discovery loader persistence privilege_escalation rat

Malware Config

Extracted

Family

remcos

Botnet

v2

C2

185.157.162.126:1995

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
remcos
mouse_option
false
mutex
qsdazeazd-EL00KX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Detects HijackLoader (aka IDAT Loader) 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\audiogram.tif	family_hijackloader

HijackLoader
HijackLoader is a multistage loader first seen in 2023.
loader hijackloader
Hijackloader family
hijackloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Enumerates connected drives 3 TTPs 46 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

Processes:

msiexec.exemsiexec.exe

description	ioc	process
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\A:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\O:	msiexec.exe
File opened (read-only)	\??\X:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\H:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\N:	msiexec.exe
File opened (read-only)	\??\W:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\V:	msiexec.exe
File opened (read-only)	\??\Y:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\R:	msiexec.exe
File opened (read-only)	\??\G:	msiexec.exe
File opened (read-only)	\??\L:	msiexec.exe
File opened (read-only)	\??\U:	msiexec.exe
File opened (read-only)	\??\Z:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\J:	msiexec.exe
File opened (read-only)	\??\K:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\E:	msiexec.exe
File opened (read-only)	\??\I:	msiexec.exe
File opened (read-only)	\??\B:	msiexec.exe
File opened (read-only)	\??\M:	msiexec.exe
File opened (read-only)	\??\P:	msiexec.exe
File opened (read-only)	\??\T:	msiexec.exe
File opened (read-only)	\??\Q:	msiexec.exe
File opened (read-only)	\??\S:	msiexec.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

EHttpSrv.execmd.exe

description	pid	process	target process
PID 2168 set thread context of 1580	2168	EHttpSrv.exe	cmd.exe
PID 1580 set thread context of 4380	1580	cmd.exe	EHttpSrv.exe

Drops file in Windows directory 11 IoCs

Processes:

msiexec.exe

description	ioc	process
File created	C:\Windows\Installer\SourceHash{BB2F3E18-3F04-450F-B8B5-60A9665181A8}	msiexec.exe
File created	C:\Windows\Installer\e57c39e.msi	msiexec.exe
File opened for modification	C:\Windows\Installer\e57c39e.msi	msiexec.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.log	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIC759.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\	msiexec.exe
File created	C:\Windows\Installer\inprogressinstallinfo.ipi	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIC42B.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIC69D.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIC799.tmp	msiexec.exe
File opened for modification	C:\Windows\Installer\MSIC8B3.tmp	msiexec.exe

Executes dropped EXE 1 IoCs

Processes:

EHttpSrv.exe

pid process

2168 EHttpSrv.exe
Loads dropped DLL 7 IoCs

Processes:

MsiExec.exeEHttpSrv.exeEHttpSrv.exe

pid process

3116 MsiExec.exe
3116 MsiExec.exe
3116 MsiExec.exe
3116 MsiExec.exe
2168 EHttpSrv.exe
2168 EHttpSrv.exe
4380 EHttpSrv.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
persistence privilege_escalation

Installer Packages
T1546.016

Msiexec
T1218.007

Processes:

msiexec.exe

pid process

1428 msiexec.exe

pid	process
2168	EHttpSrv.exe

pid	process
3116	MsiExec.exe
3116	MsiExec.exe
3116	MsiExec.exe
3116	MsiExec.exe
2168	EHttpSrv.exe
2168	EHttpSrv.exe
4380	EHttpSrv.exe

pid	process
1428	msiexec.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

MsiExec.exeEHttpSrv.execmd.exeEHttpSrv.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MsiExec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EHttpSrv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EHttpSrv.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

msiexec.exeEHttpSrv.execmd.exe

pid process

4552 msiexec.exe
4552 msiexec.exe
2168 EHttpSrv.exe
1580 cmd.exe
1580 cmd.exe
Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

EHttpSrv.execmd.exe

pid process

2168 EHttpSrv.exe
1580 cmd.exe
1580 cmd.exe

pid	process
4552	msiexec.exe
4552	msiexec.exe
2168	EHttpSrv.exe
1580	cmd.exe
1580	cmd.exe

pid	process
2168	EHttpSrv.exe
1580	cmd.exe
1580	cmd.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

msiexec.exemsiexec.exe

description	pid	process
Token: SeShutdownPrivilege	1428	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1428	msiexec.exe
Token: SeSecurityPrivilege	4552	msiexec.exe
Token: SeCreateTokenPrivilege	1428	msiexec.exe
Token: SeAssignPrimaryTokenPrivilege	1428	msiexec.exe
Token: SeLockMemoryPrivilege	1428	msiexec.exe
Token: SeIncreaseQuotaPrivilege	1428	msiexec.exe
Token: SeMachineAccountPrivilege	1428	msiexec.exe
Token: SeTcbPrivilege	1428	msiexec.exe
Token: SeSecurityPrivilege	1428	msiexec.exe
Token: SeTakeOwnershipPrivilege	1428	msiexec.exe
Token: SeLoadDriverPrivilege	1428	msiexec.exe
Token: SeSystemProfilePrivilege	1428	msiexec.exe
Token: SeSystemtimePrivilege	1428	msiexec.exe
Token: SeProfSingleProcessPrivilege	1428	msiexec.exe
Token: SeIncBasePriorityPrivilege	1428	msiexec.exe
Token: SeCreatePagefilePrivilege	1428	msiexec.exe
Token: SeCreatePermanentPrivilege	1428	msiexec.exe
Token: SeBackupPrivilege	1428	msiexec.exe
Token: SeRestorePrivilege	1428	msiexec.exe
Token: SeShutdownPrivilege	1428	msiexec.exe
Token: SeDebugPrivilege	1428	msiexec.exe
Token: SeAuditPrivilege	1428	msiexec.exe
Token: SeSystemEnvironmentPrivilege	1428	msiexec.exe
Token: SeChangeNotifyPrivilege	1428	msiexec.exe
Token: SeRemoteShutdownPrivilege	1428	msiexec.exe
Token: SeUndockPrivilege	1428	msiexec.exe
Token: SeSyncAgentPrivilege	1428	msiexec.exe
Token: SeEnableDelegationPrivilege	1428	msiexec.exe
Token: SeManageVolumePrivilege	1428	msiexec.exe
Token: SeImpersonatePrivilege	1428	msiexec.exe
Token: SeCreateGlobalPrivilege	1428	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe
Token: SeRestorePrivilege	4552	msiexec.exe
Token: SeTakeOwnershipPrivilege	4552	msiexec.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

msiexec.exe

pid process

1428 msiexec.exe
1428 msiexec.exe

pid	process
1428	msiexec.exe
1428	msiexec.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

msiexec.exeEHttpSrv.execmd.exe

description	pid	process	target process
PID 4552 wrote to memory of 3116	4552	msiexec.exe	MsiExec.exe
PID 4552 wrote to memory of 3116	4552	msiexec.exe	MsiExec.exe
PID 4552 wrote to memory of 3116	4552	msiexec.exe	MsiExec.exe
PID 4552 wrote to memory of 2168	4552	msiexec.exe	EHttpSrv.exe
PID 4552 wrote to memory of 2168	4552	msiexec.exe	EHttpSrv.exe
PID 4552 wrote to memory of 2168	4552	msiexec.exe	EHttpSrv.exe
PID 2168 wrote to memory of 1580	2168	EHttpSrv.exe	cmd.exe
PID 2168 wrote to memory of 1580	2168	EHttpSrv.exe	cmd.exe
PID 2168 wrote to memory of 1580	2168	EHttpSrv.exe	cmd.exe
PID 2168 wrote to memory of 1580	2168	EHttpSrv.exe	cmd.exe
PID 1580 wrote to memory of 4380	1580	cmd.exe	EHttpSrv.exe
PID 1580 wrote to memory of 4380	1580	cmd.exe	EHttpSrv.exe
PID 1580 wrote to memory of 4380	1580	cmd.exe	EHttpSrv.exe
PID 1580 wrote to memory of 4380	1580	cmd.exe	EHttpSrv.exe
PID 1580 wrote to memory of 4380	1580	cmd.exe	EHttpSrv.exe

C:\Windows\system32\msiexec.exe
msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\Slf.msi
1⤵
- Enumerates connected drives
- Event Triggered Execution: Installer Packages
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:1428

C:\Windows\system32\msiexec.exe
C:\Windows\system32\msiexec.exe /V
1⤵
- Enumerates connected drives
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4552
- C:\Windows\syswow64\MsiExec.exe
  C:\Windows\syswow64\MsiExec.exe -Embedding 64DD34E820C49CA949A7EB7582E1DAB3
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:3116
- C:\Users\Admin\AppData\Local\Temp\EHttpSrv.exe
  "C:\Users\Admin\AppData\Local\Temp\EHttpSrv.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2168
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\SysWOW64\cmd.exe
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:1580
  - - C:\Users\Admin\AppData\Local\Temp\EHttpSrv.exe
      C:\Users\Admin\AppData\Local\Temp\EHttpSrv.exe
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:4380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Installer Packages

1

T1546.016

Privilege Escalation

Event Triggered Execution

1

T1546

Installer Packages

1

T1546.016

Defense Evasion

System Binary Proxy Execution

1

T1218

Msiexec

1

T1218.007

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Config.Msi\e57c3a1.rbs

Filesize
2KB

MD5
66a986ce4ecbc2e2595cf18d3edf7bf4

SHA1
4d22c06d9d82f8f802b816b08f46fc890737928e

SHA256
1c5f19213d9abc69165ac8ce9e58ee52c2075f6fe7f3f9945128ec4913b2bc58

SHA512
9fc05a0a7fda8c44bd21e3b3e558f55fc9fc7430eedb6b4563bd1a83f4fb675e76d2fbcde52c06b54a70e4c98e3efc5afe4ca748619ac7bd6ce4f37c5780fd9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\687a3e57

Filesize
1.0MB

MD5
dd6db4ca7ed5f81c1eb9e4d26c951124

SHA1
f84cb464074497cdb0ec6fef6ae91acb899ecc35

SHA256
8d521f5b9796206e1768dde736682802c7c0239ec2397c9e2c4ad57619b535eb

SHA512
0425d309741581245583a325329e11a27f2fee1d78fd437d0fe2865f3890510890f5c7e5178c7487fd189ae03b8c0a8c4bb0962a4509ffb47b1a2584ef213b36

Download Submit
C:\Users\Admin\AppData\Local\Temp\EHttpSrv.exe

Filesize
20KB

MD5
9329ba45c8b97485926a171e34c2abb8

SHA1
20118bc0432b4e8b3660a4b038b20ca28f721e5c

SHA256
effa6fcb8759375b4089ccf61202a5c63243f4102872e64e3eb0a1bdc2727659

SHA512
0af06b5495142ba0632a46be0778a7bd3d507e9848b3159436aa504536919abbcacd8b740ef4b591296e86604b49e0642fee2c273a45e44b41a80f91a1d52acc

Download Submit
C:\Users\Admin\AppData\Local\Temp\MFC80U.DLL

Filesize
1.0MB

MD5
686b224b4987c22b153fbb545fee9657

SHA1
684ee9f018fbb0bbf6ffa590f3782ba49d5d096c

SHA256
a2ac851f35066c2f13a7452b7a9a3fee05bfb42907ae77a6b85b212a2227fc36

SHA512
44d65db91ceea351d2b6217eaa27358dbc2ed27c9a83d226b59aecb336a9252b60aec5ce5e646706a2af5631d5ee0f721231ec751e97e47bbbc32d5f40908875

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSI7c13d.LOG

Filesize
20KB

MD5
454bbf3704af450f8228f7b85a8935c5

SHA1
3643cb1b591c30b199f1e3edfac30f01d710005f

SHA256
b2612a81c17f3624092c0b07dfac231f6de24bc0169b3d343916736a01944a3a

SHA512
67d9490e261f22968efff430de457d9016fde7e3532f508e26d24c54ef05a827b664406416663fac8eea55fa113a92e2d37d62fa6602722af7d3c11eff1759e1

Download Submit
C:\Users\Admin\AppData\Local\Temp\audiogram.tif

Filesize
877KB

MD5
5124236fd955464317fbb1f344a1d2f2

SHA1
fe3a91e252f1dc3c3b4980ade7157369ea6f5097

SHA256
ed1389002cdf96c9b54de35b6e972166ee3296d628943fd594a383e674c5cba6

SHA512
2b2ac23244b16f936ef9a4049586f58c809fcc4391a56390cc5db2e8d96140001e0b977680ed1d8b0ab9c410e865a880209e22add8d42e563dc40bc91236b252

Download Submit
C:\Users\Admin\AppData\Local\Temp\http_dll.dll

Filesize
883KB

MD5
4366cd6c5d795811822b9ccc3df3eab4

SHA1
30f6050729b4c08b7657454cb79dd5a3d463c606

SHA256
55497a3eced5d8d190400bcd1a4b43a304ebf74a0d6d098665474ed4b1b0e9da

SHA512
4a56a2da7ded16125c2795d5760c7c08a93362536c9212cff3a31dbf6613cb3fca436efd77c256338f5134da955bc7ccc564b4af0c45ac0dfd645460b922a349

Download Submit
C:\Windows\Installer\MSIC42B.tmp

Filesize
557KB

MD5
2c9c51ac508570303c6d46c0571ea3a1

SHA1
e3e0fe08fa11a43c8bca533f212bdf0704c726d5

SHA256
ff86c76a8d5846b3a1ad58ff2fd8e5a06a84eb5899cdee98e59c548d33335550

SHA512
df5f1def5aac44f39a2dfde9c6c73f15f83a7374b4ad42b67e425ccb7ac99a64c5701b676ae46d2f7167a04a955158031a839e7878d100aaf8fab0ce2059f127

Download Submit
memory/1580-54-0x00007FFFA91F0000-0x00007FFFA93E5000-memory.dmp

Filesize
2.0MB

Download
memory/1580-56-0x0000000073B60000-0x0000000073CDB000-memory.dmp

Filesize
1.5MB

Download
memory/2168-45-0x0000000073B60000-0x0000000073CDB000-memory.dmp

Filesize
1.5MB

Download
memory/2168-51-0x0000000073B60000-0x0000000073CDB000-memory.dmp

Filesize
1.5MB

Download
memory/4380-58-0x0000000072900000-0x0000000073B54000-memory.dmp

Filesize
18.3MB

Download
memory/4380-60-0x00007FFFA91F0000-0x00007FFFA93E5000-memory.dmp

Filesize
2.0MB

Download
memory/4380-61-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-64-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-65-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-67-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-68-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-69-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-70-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-71-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-74-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download
memory/4380-75-0x0000000000410000-0x0000000000494000-memory.dmp

Filesize
528KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads