quasar | ba81b05c43bae8ee850ebff1ca399808b4828e5455ad2b2f9e64dd7962c33862

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General

Target

ba81b05c43bae8ee850ebff1ca399808b4828e5455ad2b2f9e64dd7962c33862
Size

3.1MB
MD5

1633db1ce0d5eae8b246019541b00372
SHA1

00b8f4ede2ca86fd53b3012e4a317318a20dd39b
SHA256

ba81b05c43bae8ee850ebff1ca399808b4828e5455ad2b2f9e64dd7962c33862
SHA512

3843b4ad7b2a6d7dd8220f4dd30952a3f6d9918c1391234d3fc2abfcd2adcfd33a6d161a9ad562df661149dedaf5b0589484eb053fdb35c3f41983066e22751a
SSDEEP

49152:rvzlL26AaNeWgPhlmVqvMQ7XSKY9BSPnaMYLowdseTHHB72eh2NT:rvpL26AaNeWgPhlmVqkQ7XSK+oPY

Score

10^/10

office04 quasar

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.111:4782

Mutex

1f5e43b0-2e6e-4529-bedf-628650591bdf

Attributes

encryption_key
0FF1E4E83CF341CB74C4BB8B5D7980A41A9AF65B
install_name
DescryptMain.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

Processes:

resource yara_rule

sample INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

Processes:

resource yara_rule

sample INDICATOR_SUSPICIOUS_Binary_References_Browsers
Detects executables containing common artifacts observed in infostealers 1 IoCs

Processes:

resource yara_rule

sample INDICATOR_SUSPICIOUS_GENInfoStealer
Quasar family
quasar
Quasar payload 1 IoCs

Processes:

resource yara_rule

sample family_quasar
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.

Processes:

resource

ba81b05c43bae8ee850ebff1ca399808b4828e5455ad2b2f9e64dd7962c33862

resource	yara_rule
sample	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

resource	yara_rule
sample	INDICATOR_SUSPICIOUS_Binary_References_Browsers

resource	yara_rule
sample	INDICATOR_SUSPICIOUS_GENInfoStealer

resource	yara_rule
sample	family_quasar

resource
ba81b05c43bae8ee850ebff1ca399808b4828e5455ad2b2f9e64dd7962c33862

Files

ba81b05c43bae8ee850ebff1ca399808b4828e5455ad2b2f9e64dd7962c33862
.exe windows:4 windows x86 arch:x86

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE

Imports

mscoree

_CorExeMain

Sections

.text
Size: 3.1MB - Virtual size: 3.1MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rsrc
Size: 3KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 12B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Extracted

Signatures

Files

f34d5f2d4577ed6d9ceec516c1f5a744

Headers

DLL Characteristics

File Characteristics

Imports

mscoree

Sections

.text Size: 3.1MB - Virtual size: 3.1MB

.rsrc Size: 3KB - Virtual size: 2KB

.reloc Size: 512B - Virtual size: 12B

.text
Size: 3.1MB - Virtual size: 3.1MB

.rsrc
Size: 3KB - Virtual size: 2KB

.reloc
Size: 512B - Virtual size: 12B