nymaim | ba7654956c0c80e24867d9bbd0af693bb89e8bbdace3485df857cdda6bb93824

General

Target

file.exe
Size

1.8MB
MD5

873d9b8b73800d35ad6dab68bf156a98
SHA1

68f7896de06ff6b7345c5816a54beba014a4b8c1
SHA256

ba7654956c0c80e24867d9bbd0af693bb89e8bbdace3485df857cdda6bb93824
SHA512

1fe3073ae1e53a25c28ea9295a8136aab4848d78c883ade28eb294decad0f7d282410885d61f78e156c5f99354f12ca5d5be9e0336c0434e6d9f0d946cdd439b
SSDEEP

49152:y2+15/SocV6xgHdTo9KMniNdmVF0KmGo3Oe9wUAI/m/WahOVLH:jvvVPvMnudg0O3Uc/JhOVLH

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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
2668	file.tmp
4724	HitFiles134.exe
1800	no0NK9739T.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	HitFiles134.exe

Loads dropped DLL 1 IoCs

pid	Process
2668	file.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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-JFLB8.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-37DV1.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-TJ2N5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-AKQ2V.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-H0TF0.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\HitFiles134.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-H127U.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-PGD50.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-TQA8T.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-Q90DD.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-K9UL6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-R6ELL.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IBGF5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-A7734.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-T0AB1.tmp	file.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
2556	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4724	HitFiles134.exe
4724	HitFiles134.exe
4724	HitFiles134.exe
4724	HitFiles134.exe
4724	HitFiles134.exe
4724	HitFiles134.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2556	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 2668	4816	file.exe	81
PID 4816 wrote to memory of 2668	4816	file.exe	81
PID 4816 wrote to memory of 2668	4816	file.exe	81
PID 2668 wrote to memory of 4724	2668	file.tmp	82
PID 2668 wrote to memory of 4724	2668	file.tmp	82
PID 2668 wrote to memory of 4724	2668	file.tmp	82
PID 4724 wrote to memory of 1800	4724	HitFiles134.exe	83
PID 4724 wrote to memory of 1800	4724	HitFiles134.exe	83
PID 4724 wrote to memory of 1800	4724	HitFiles134.exe	83
PID 4724 wrote to memory of 3784	4724	HitFiles134.exe	91
PID 4724 wrote to memory of 3784	4724	HitFiles134.exe	91
PID 4724 wrote to memory of 3784	4724	HitFiles134.exe	91
PID 3784 wrote to memory of 2556	3784	cmd.exe	93
PID 3784 wrote to memory of 2556	3784	cmd.exe	93
PID 3784 wrote to memory of 2556	3784	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4816
- C:\Users\Admin\AppData\Local\Temp\is-20S3S.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-20S3S.tmp\file.tmp" /SL5="$8002C,1665573,162304,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2668
- - C:\Program Files (x86)\Split Files\HitFiles134.exe
    "C:\Program Files (x86)\Split Files\HitFiles134.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4724
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\no0NK9739T.exe
      4⤵
      Executes dropped EXE
      PID:1800
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "HitFiles134.exe" /f & erase "C:\Program Files (x86)\Split Files\HitFiles134.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3784
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "HitFiles134.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2556

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Split Files\HitFiles134.exe

Filesize
3.2MB

MD5
27f8045a97c36b430e64eb7237bf1611

SHA1
3eb15188c8ce11b213a12c32f62f7a8c193e6784

SHA256
c47573fd2b47fa73480922a2d19d387a20c8afe9c77a01825a4ae050eb090adf

SHA512
cdee0330ea4662e5e0e2b27ffebca35e6ef08d5e783b4a7ca2d35baa8170feb2a62f063f8ddbe622c7e55bf636af789b7c8a3af63e29b9a3f32fe0cc7a2fd22e

Download Submit
C:\Program Files (x86)\Split Files\HitFiles134.exe

Filesize
3.2MB

MD5
27f8045a97c36b430e64eb7237bf1611

SHA1
3eb15188c8ce11b213a12c32f62f7a8c193e6784

SHA256
c47573fd2b47fa73480922a2d19d387a20c8afe9c77a01825a4ae050eb090adf

SHA512
cdee0330ea4662e5e0e2b27ffebca35e6ef08d5e783b4a7ca2d35baa8170feb2a62f063f8ddbe622c7e55bf636af789b7c8a3af63e29b9a3f32fe0cc7a2fd22e

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-20S3S.tmp\file.tmp

Filesize
800KB

MD5
7013a53c5472267941844ed17de4de3c

SHA1
dda886aa81995da2abb763969bba86e82988db1a

SHA256
9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

SHA512
6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-20S3S.tmp\file.tmp

Filesize
800KB

MD5
7013a53c5472267941844ed17de4de3c

SHA1
dda886aa81995da2abb763969bba86e82988db1a

SHA256
9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

SHA512
6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-AGKM2.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\no0NK9739T.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\no0NK9739T.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4724-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4724-144-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4724-142-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4724-143-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4724-152-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4724-155-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4816-132-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4816-138-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4816-156-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing