nymaim | 68f36bf074c8b19484cd0ec6f1c7e68520dbbf995b0268871c2cd6f388cd7156

Analysis

max time kernel
61s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24/10/2022, 00:47

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.4MB
Sample221024-a47smsdfdp
SHA256 68f36bf074c8b19484cd0ec6f1c7e68520dbbf995b0268871c2cd6f388cd7156
MD5 f6860465df5388ee77c5c9a2697cf175
SHA1 da315d39ddacc9b5d5c907e91e8782114db6804a
SHA512 5a308f54be02eaddd1dd0bf84978a4366e3e0824794c237ab9d29bd45a58b4976b2709c1e28906d85fd0ccc1c6b8c5d40aa02094e654207831df29cdbb6a06c9
SSDEEP 49152:Z2Gz/VCJ2S5EZv3JAcrPZ3uz0IEycCaQ+s5VQsC2SR7A5hq:MGDVCGB6EZ3M0WZ95g28sDq
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4920	is-LBQLC.tmp
1980	ersearcher57.exe
4804	o0lwejQn.exe

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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	ersearcher57.exe

Loads dropped DLL 1 IoCs

pid	Process
4920	is-LBQLC.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\erSearcher\is-RTF90.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-6HNBS.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-MOME9.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-QM0FA.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-KB9QP.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-0GS0A.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-AQNSN.tmp	is-LBQLC.tmp
File opened for modification	C:\Program Files (x86)\erSearcher\unins000.dat	is-LBQLC.tmp
File opened for modification	C:\Program Files (x86)\erSearcher\ersearcher57.exe	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\unins000.dat	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-GDHER.tmp	is-LBQLC.tmp
File created	C:\Program Files (x86)\erSearcher\is-5OHCA.tmp	is-LBQLC.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
812	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1980	ersearcher57.exe
1980	ersearcher57.exe
1980	ersearcher57.exe
1980	ersearcher57.exe
1980	ersearcher57.exe
1980	ersearcher57.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	812	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 4920	4584	file.exe	81
PID 4584 wrote to memory of 4920	4584	file.exe	81
PID 4584 wrote to memory of 4920	4584	file.exe	81
PID 4920 wrote to memory of 1980	4920	is-LBQLC.tmp	82
PID 4920 wrote to memory of 1980	4920	is-LBQLC.tmp	82
PID 4920 wrote to memory of 1980	4920	is-LBQLC.tmp	82
PID 1980 wrote to memory of 4804	1980	ersearcher57.exe	83
PID 1980 wrote to memory of 4804	1980	ersearcher57.exe	83
PID 1980 wrote to memory of 4804	1980	ersearcher57.exe	83
PID 1980 wrote to memory of 3584	1980	ersearcher57.exe	85
PID 1980 wrote to memory of 3584	1980	ersearcher57.exe	85
PID 1980 wrote to memory of 3584	1980	ersearcher57.exe	85
PID 3584 wrote to memory of 812	3584	cmd.exe	87
PID 3584 wrote to memory of 812	3584	cmd.exe	87
PID 3584 wrote to memory of 812	3584	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Users\Admin\AppData\Local\Temp\is-P48NG.tmp\is-LBQLC.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-P48NG.tmp\is-LBQLC.tmp" /SL4 $8004A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2270293 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4920
- - C:\Program Files (x86)\erSearcher\ersearcher57.exe
    "C:\Program Files (x86)\erSearcher\ersearcher57.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1980
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\o0lwejQn.exe
      4⤵
      Executes dropped EXE
      PID:4804
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ersearcher57.exe" /f & erase "C:\Program Files (x86)\erSearcher\ersearcher57.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3584
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ersearcher57.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:812

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

ersearcher57.exe

Path C:\Program Files (x86)\erSearcher\ersearcher57.exe
Size 3.9MB
SHA256 a5fab19e91f570c91adf13213458a98f52a23e5a8a9ba89f26c156e40216bf5d
MD5 59b594c8493f686b7a7734aa510e90ea
SHA1 41082d7cc33cb4ef6982515a1781af6d44a96f0a
SHA512 54da7dbe7f4f887c37548b4b4c6427ee69d06add20a75d3bffdfadd4ac0576dce1e580015b3139b7d4846905b9c8adafa0068d22e5135f08d37627d03ba2f804
SSDEEP 49152:kFXA7I18YtvYtzYtFYtbYthYtIUA03LN7gQXBWmJV7hsoh5h8OD/irs/Q:UMI11U757gQXB1Zhsoh5h86iQY
MD5 SHA1 SHA512 SSDEEP

Submit Download

ersearcher57.exe

Path C:\Program Files (x86)\erSearcher\ersearcher57.exe
Size 3.9MB
SHA256 a5fab19e91f570c91adf13213458a98f52a23e5a8a9ba89f26c156e40216bf5d
MD5 59b594c8493f686b7a7734aa510e90ea
SHA1 41082d7cc33cb4ef6982515a1781af6d44a96f0a
SHA512 54da7dbe7f4f887c37548b4b4c6427ee69d06add20a75d3bffdfadd4ac0576dce1e580015b3139b7d4846905b9c8adafa0068d22e5135f08d37627d03ba2f804
SSDEEP 49152:kFXA7I18YtvYtzYtFYtbYthYtIUA03LN7gQXBWmJV7hsoh5h8OD/irs/Q:UMI11U757gQXB1Zhsoh5h86iQY
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-GQ9DF.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

is-LBQLC.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-P48NG.tmp\is-LBQLC.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-LBQLC.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-P48NG.tmp\is-LBQLC.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

Submit Download

o0lwejQn.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\o0lwejQn.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

o0lwejQn.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\o0lwejQn.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1980-143-0x0000000000400000-0x00000000015F3000-memory.dmp

Download

memory/1980-142-0x0000000000400000-0x00000000015F3000-memory.dmp

Download

memory/1980-144-0x0000000000400000-0x00000000015F3000-memory.dmp

Download

memory/1980-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/1980-152-0x0000000000400000-0x00000000015F3000-memory.dmp

Download

memory/1980-155-0x0000000000400000-0x00000000015F3000-memory.dmp

Download

memory/4584-132-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/4584-137-0x0000000000400000-0x0000000000414000-memory.dmp

Download

memory/4584-156-0x0000000000400000-0x0000000000414000-memory.dmp

Download