nymaim | b78abc3e0d34c177c0e0a1363c8009164537610a6e42fb43b742ade93f35e23c

General

Target

file.exe
Size

1.4MB
MD5

aaad1a286feee914ef220663d0c9efd0
SHA1

454a9113749d663cf21e4dc2826f71eea058ef3a
SHA256

b78abc3e0d34c177c0e0a1363c8009164537610a6e42fb43b742ade93f35e23c
SHA512

7dbec86d9da4b67f2d22fc157c2c1b6a8b47e8b5ce8a6d2dea5708099040cf71e05542a90a499047a09c78a325673393f7f6e044adebbf96555cd2c74f4e5e38
SSDEEP

24576:NizuDH7k/APvEoMXt12+zg3R7kicGRZWM9G38BiVBwE33elYkX1t6rXCUMUgZIY/:muDbk/Aa2wghpFRkMY3p1noYkFwSTNey

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
1940	is-H3T7Q.tmp
920	PrintFolders.exe
332	zkyXAVJzh.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1940	is-H3T7Q.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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-ET57H.tmp	is-H3T7Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VBE9H.tmp	is-H3T7Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-H3T7Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RDIHS.tmp	is-H3T7Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-546FP.tmp	is-H3T7Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RQE1O.tmp	is-H3T7Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-H3T7Q.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-H3T7Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2R6AI.tmp	is-H3T7Q.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
3652	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
920	PrintFolders.exe
920	PrintFolders.exe
920	PrintFolders.exe
920	PrintFolders.exe
920	PrintFolders.exe
920	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
920	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3652	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 1940	1436	file.exe	79
PID 1436 wrote to memory of 1940	1436	file.exe	79
PID 1436 wrote to memory of 1940	1436	file.exe	79
PID 1940 wrote to memory of 920	1940	is-H3T7Q.tmp	80
PID 1940 wrote to memory of 920	1940	is-H3T7Q.tmp	80
PID 1940 wrote to memory of 920	1940	is-H3T7Q.tmp	80
PID 920 wrote to memory of 332	920	PrintFolders.exe	81
PID 920 wrote to memory of 332	920	PrintFolders.exe	81
PID 920 wrote to memory of 332	920	PrintFolders.exe	81
PID 920 wrote to memory of 4624	920	PrintFolders.exe	84
PID 920 wrote to memory of 4624	920	PrintFolders.exe	84
PID 920 wrote to memory of 4624	920	PrintFolders.exe	84
PID 4624 wrote to memory of 3652	4624	cmd.exe	86
PID 4624 wrote to memory of 3652	4624	cmd.exe	86
PID 4624 wrote to memory of 3652	4624	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1436
- C:\Users\Admin\AppData\Local\Temp\is-M4LRI.tmp\is-H3T7Q.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-M4LRI.tmp\is-H3T7Q.tmp" /SL4 $90046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1237110 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:920
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\zkyXAVJzh.exe
      4⤵
      Executes dropped EXE
      PID:332
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4624
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3652

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)\PrintFolders\PrintFolders.exe

Filesize
1.6MB

MD5
ee0349f724af521a64f077d005046f51

SHA1
6d4772ece05db01ef3dd2e35fdd96603a028660c

SHA256
5c07bcbe364d8f158c3d5b2bd06de8710e2bf7841eef46d4de1f7efcd0027ff2

SHA512
4ddb4b294e04a26600ded4bc9abdde96c6e901f0bd9adb1ebe6280a9c8faf4ffd7cda303b615ce6afc7d45d7f109f6daff227ebcffa6520f4838621a59c980dd

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

Filesize
1.6MB

MD5
ee0349f724af521a64f077d005046f51

SHA1
6d4772ece05db01ef3dd2e35fdd96603a028660c

SHA256
5c07bcbe364d8f158c3d5b2bd06de8710e2bf7841eef46d4de1f7efcd0027ff2

SHA512
4ddb4b294e04a26600ded4bc9abdde96c6e901f0bd9adb1ebe6280a9c8faf4ffd7cda303b615ce6afc7d45d7f109f6daff227ebcffa6520f4838621a59c980dd

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-M4LRI.tmp\is-H3T7Q.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-M4LRI.tmp\is-H3T7Q.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/332-145-0x0000000000000000-mapping.dmp

Download
memory/920-143-0x0000000000400000-0x00000000013A2000-memory.dmp

Filesize
15.6MB

Download
memory/920-142-0x0000000000400000-0x00000000013A2000-memory.dmp

Filesize
15.6MB

Download
memory/920-144-0x0000000000400000-0x00000000013A2000-memory.dmp

Filesize
15.6MB

Download
memory/920-139-0x0000000000000000-mapping.dmp

Download
memory/920-148-0x0000000000400000-0x00000000013A2000-memory.dmp

Filesize
15.6MB

Download
memory/920-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/920-155-0x0000000000400000-0x00000000013A2000-memory.dmp

Filesize
15.6MB

Download
memory/1436-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1436-137-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1436-156-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1940-134-0x0000000000000000-mapping.dmp

Download
memory/3652-154-0x0000000000000000-mapping.dmp

Download
memory/4624-153-0x0000000000000000-mapping.dmp

Download

Resubmissions

Analysis

Sharing