nymaim | 21f4648455f88cae61ae6435b1d4f50cebd4d8037f7cf0b16145e96b8c152f5b

General

Target

file.exe
Size

2.5MB
MD5

f37aa60c5ad313e681453ba3cd706d6a
SHA1

5d151a912f032cfbbc64b684f37f6c743ef03dc1
SHA256

21f4648455f88cae61ae6435b1d4f50cebd4d8037f7cf0b16145e96b8c152f5b
SHA512

fe2c032ead18b1e9fd68eb6d1a79984f15057efd387e69ca2f18da67d1634928731e0ad42bca9cef7c40a2c8d2979035d01d40253b34f6a6dc0e02fd06b927e0
SSDEEP

49152:Z2kifGePz6U97Fm0U63qgvu7Ejls02SgW9CYpCS+6+YF6rZpbn0umjCkDXA5hq:MNfGc/ZFI0Xs02SgW9dkSMYA1pb0GVDq

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
372	is-AHE11.tmp
4800	fhsearcher65.exe
3552	xcwTw6bagJ.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	fhsearcher65.exe

Loads dropped DLL 1 IoCs

pid	Process
372	is-AHE11.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)\fhSearcher\is-5IRC8.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-5I8CO.tmp	is-AHE11.tmp
File opened for modification	C:\Program Files (x86)\fhSearcher\unins000.dat	is-AHE11.tmp
File opened for modification	C:\Program Files (x86)\fhSearcher\fhsearcher65.exe	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\unins000.dat	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-520BS.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-VD4IB.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-LS5VK.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-JURLG.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-688MU.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-FDH32.tmp	is-AHE11.tmp
File created	C:\Program Files (x86)\fhSearcher\is-SP59U.tmp	is-AHE11.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
2388	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4800	fhsearcher65.exe
4800	fhsearcher65.exe
4800	fhsearcher65.exe
4800	fhsearcher65.exe
4800	fhsearcher65.exe
4800	fhsearcher65.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2676 wrote to memory of 372	2676	file.exe	82
PID 2676 wrote to memory of 372	2676	file.exe	82
PID 2676 wrote to memory of 372	2676	file.exe	82
PID 372 wrote to memory of 4800	372	is-AHE11.tmp	83
PID 372 wrote to memory of 4800	372	is-AHE11.tmp	83
PID 372 wrote to memory of 4800	372	is-AHE11.tmp	83
PID 4800 wrote to memory of 3552	4800	fhsearcher65.exe	87
PID 4800 wrote to memory of 3552	4800	fhsearcher65.exe	87
PID 4800 wrote to memory of 3552	4800	fhsearcher65.exe	87
PID 4800 wrote to memory of 3844	4800	fhsearcher65.exe	92
PID 4800 wrote to memory of 3844	4800	fhsearcher65.exe	92
PID 4800 wrote to memory of 3844	4800	fhsearcher65.exe	92
PID 3844 wrote to memory of 2388	3844	cmd.exe	94
PID 3844 wrote to memory of 2388	3844	cmd.exe	94
PID 3844 wrote to memory of 2388	3844	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2676
- C:\Users\Admin\AppData\Local\Temp\is-VC9AK.tmp\is-AHE11.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-VC9AK.tmp\is-AHE11.tmp" /SL4 $5002C "C:\Users\Admin\AppData\Local\Temp\file.exe" 2382468 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:372
- - C:\Program Files (x86)\fhSearcher\fhsearcher65.exe
    "C:\Program Files (x86)\fhSearcher\fhsearcher65.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4800
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\xcwTw6bagJ.exe
      4⤵
      Executes dropped EXE
      PID:3552
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "fhsearcher65.exe" /f & erase "C:\Program Files (x86)\fhSearcher\fhsearcher65.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3844
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "fhsearcher65.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2388

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

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Downloads

C:\Program Files (x86)\fhSearcher\fhsearcher65.exe

Filesize
3.6MB

MD5
3fbc48a9fc5eb88789e069fa0cd41d8a

SHA1
2938566c1e763970a12d0db07e27f946ecc98a05

SHA256
d9b6576b0f60d6d75a4718ff917a6612bbdca27884c136d829ad90c525be8624

SHA512
cda5ae5484a450af58e4145f7fa633c95906a147cef7aa76b584fbb2ba5e8754b6b7809e68807ed1c6abfee93a29ea741416f012a895be37fc5d70fac878a254

Download Submit
C:\Program Files (x86)\fhSearcher\fhsearcher65.exe

Filesize
3.6MB

MD5
3fbc48a9fc5eb88789e069fa0cd41d8a

SHA1
2938566c1e763970a12d0db07e27f946ecc98a05

SHA256
d9b6576b0f60d6d75a4718ff917a6612bbdca27884c136d829ad90c525be8624

SHA512
cda5ae5484a450af58e4145f7fa633c95906a147cef7aa76b584fbb2ba5e8754b6b7809e68807ed1c6abfee93a29ea741416f012a895be37fc5d70fac878a254

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-4L2C1.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-VC9AK.tmp\is-AHE11.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-VC9AK.tmp\is-AHE11.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\xcwTw6bagJ.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\xcwTw6bagJ.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2676-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2676-134-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2676-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2676-147-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4800-143-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4800-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4800-148-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4800-142-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4800-155-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download

Analysis

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