nymaim | 4f6e8557745996dbd1c3f2a70e2015e2647f8a60a1807baa125c2585ff8398bf

Analysis

max time kernel
91s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
08/12/2022, 16:02

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.3MB
Sample221208-tgr88aad85
SHA256 4f6e8557745996dbd1c3f2a70e2015e2647f8a60a1807baa125c2585ff8398bf
MD5 823b50e2644fef48f7fb59e77a5c05d5
SHA1 cc6d595015823756600bcaf8d5580375cf78331f
SHA512 8e2afbc8f83aacc1646fb423475d73de70b50e9e196c70c4c809120ac97de99e13bac393028fd88d6deb143494a385fb9f6c725fcc08023dffc3da7ed299bdac
SSDEEP 49152:yGJaigNmzSkVXpG89XK615vU0PtA9Xm64r4G1SDv30YmqZwN41kf:yGAigNgSkVXpX15vjFAVpESDsYt0
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
816	is-78KNE.tmp
4940	IntFolders.exe
4028	CakAp4pxdD7sUX.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	IntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
816	is-78KNE.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-P5KKD.tmp	is-78KNE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-701SE.tmp	is-78KNE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AQ36Q.tmp	is-78KNE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SKD5U.tmp	is-78KNE.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-78KNE.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-78KNE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0BGMT.tmp	is-78KNE.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\IntFolders.exe	is-78KNE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I3NPT.tmp	is-78KNE.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
976	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4940	IntFolders.exe
4940	IntFolders.exe
4940	IntFolders.exe
4940	IntFolders.exe
4940	IntFolders.exe
4940	IntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	976	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 816	2200	file.exe	80
PID 2200 wrote to memory of 816	2200	file.exe	80
PID 2200 wrote to memory of 816	2200	file.exe	80
PID 816 wrote to memory of 4940	816	is-78KNE.tmp	81
PID 816 wrote to memory of 4940	816	is-78KNE.tmp	81
PID 816 wrote to memory of 4940	816	is-78KNE.tmp	81
PID 4940 wrote to memory of 4028	4940	IntFolders.exe	82
PID 4940 wrote to memory of 4028	4940	IntFolders.exe	82
PID 4940 wrote to memory of 4028	4940	IntFolders.exe	82
PID 4940 wrote to memory of 3748	4940	IntFolders.exe	90
PID 4940 wrote to memory of 3748	4940	IntFolders.exe	90
PID 4940 wrote to memory of 3748	4940	IntFolders.exe	90
PID 3748 wrote to memory of 976	3748	cmd.exe	92
PID 3748 wrote to memory of 976	3748	cmd.exe	92
PID 3748 wrote to memory of 976	3748	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2200
- C:\Users\Admin\AppData\Local\Temp\is-07LF2.tmp\is-78KNE.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-07LF2.tmp\is-78KNE.tmp" /SL4 $40056 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2220146 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:816
- - C:\Program Files (x86)\PrintFolders\IntFolders.exe
    "C:\Program Files (x86)\PrintFolders\IntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4940
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\CakAp4pxdD7sUX.exe
      4⤵
      Executes dropped EXE
      PID:4028
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "IntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\IntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3748
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "IntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:976

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

IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.5MB
SHA256 882d01beb2fe2723bf5a1aa7d5789878c93575d618e2be83e0099452cce7f3b7
MD5 722f905ceaa28804f6f7af5133068386
SHA1 df8d79c91213457a83a1db145ea9a77c340305bb
SHA512 6bf6ecfa4a40a10a7c43ae7aa9124cb8b9901671752bbf12e5da411112c0cf92bfc4cf8c58d1201bc305677559f56e7f534c421da584c1ef06a2c246b9f2706e
SSDEEP 49152:35OBXucmmkkOJ21DLlaFk9/3sx95a3R5J2u69q/3X:35OBXucmmbOJ21DLsFE/3sng3R5J24
MD5 SHA1 SHA512 SSDEEP

Submit Download

IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.5MB
SHA256 882d01beb2fe2723bf5a1aa7d5789878c93575d618e2be83e0099452cce7f3b7
MD5 722f905ceaa28804f6f7af5133068386
SHA1 df8d79c91213457a83a1db145ea9a77c340305bb
SHA512 6bf6ecfa4a40a10a7c43ae7aa9124cb8b9901671752bbf12e5da411112c0cf92bfc4cf8c58d1201bc305677559f56e7f534c421da584c1ef06a2c246b9f2706e
SSDEEP 49152:35OBXucmmkkOJ21DLlaFk9/3sx95a3R5J2u69q/3X:35OBXucmmbOJ21DLsFE/3sng3R5J24
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-78KNE.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-07LF2.tmp\is-78KNE.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-78KNE.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-07LF2.tmp\is-78KNE.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-6828L.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

CakAp4pxdD7sUX.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\CakAp4pxdD7sUX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

CakAp4pxdD7sUX.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\CakAp4pxdD7sUX.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/2200-132-0x0000000000400000-0x0000000000418000-memory.dmp

Download

memory/2200-155-0x0000000000400000-0x0000000000418000-memory.dmp

Download

memory/2200-138-0x0000000000400000-0x0000000000418000-memory.dmp

Download

memory/4940-143-0x0000000000400000-0x000000000157C000-memory.dmp

Download

memory/4940-151-0x0000000000400000-0x000000000157C000-memory.dmp

Download

memory/4940-147-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/4940-142-0x0000000000400000-0x000000000157C000-memory.dmp

Download

memory/4940-154-0x0000000000400000-0x000000000157C000-memory.dmp

Download